Diffusion Ant (type-hints-typescript) Code

root.zig
899dad6b8a9etype-hints-typescript

root.zig
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			const std = @import("std");
			const builtin = @import("builtin");

			pub const cli = @import("cli.zig");
			pub const lockfile = @import("lockfile.zig");
			pub const cache = @import("cache.zig");
			pub const fetcher = @import("fetcher.zig");
			pub const extractor = @import("extractor.zig");
			pub const linker = @import("linker.zig");
			pub const resolver = @import("resolver.zig");
			pub const intern = @import("intern.zig");
			pub const json = @import("json.zig");
			pub const debug = @import("debug.zig");

			const global_allocator: std.mem.Allocator = std.heap.c_allocator;

			fn getHomeDir(allocator: std.mem.Allocator) ![]const u8 {
			if (builtin.os.tag == .windows) {
			const home_w = std.process.getenvW(
			std.unicode.utf8ToUtf16LeStringLiteral("USERPROFILE")
			) orelse return error.NoHomeDir;
			return std.unicode.utf16LeToUtf8Alloc(allocator, home_w) catch error.NoHomeDir;
			}
			const home = std.posix.getenv("HOME") orelse return error.NoHomeDir;
			return allocator.dupe(u8, home);
			}

			fn getAbsoluteEnv(name: [:0]const u8) ?[]const u8 {
			if (builtin.os.tag == .windows) return null;
			const value = std.posix.getenv(name) orelse return null;
			if (value.len == 0 or !std.fs.path.isAbsolute(value)) return null;
			return value;
			}

			fn getLegacyAntDirIfExists(allocator: std.mem.Allocator) !?[]const u8 {
			const home = try getHomeDir(allocator);
			defer allocator.free(home);

			const dir = try std.fmt.allocPrint(allocator, "{s}/.ant", .{home});
			std.fs.cwd().access(dir, .{}) catch {
			allocator.free(dir);
			return null;
			};
			return dir;
			}

			pub const PkgError = enum(c_int) {
			ok = 0,
			out_of_memory = -1,
			invalid_lockfile = -2,
			io_error = -3,
			network_error = -4,
			cache_error = -5,
			extract_error = -6,
			resolve_error = -7,
			invalid_argument = -8,
			not_found = -9,
			integrity_mismatch = -10,
			};

			pub const ProgressCallback = ?*const fn (
			user_data: ?*anyopaque,
			phase: Phase,
			current: u32,
			total: u32,
			message: [*:0]const u8,
			) callconv(.c) void;

			pub const Phase = enum(c_int) {
			resolving = 0,
			fetching = 1,
			extracting = 2,
			linking = 3,
			caching = 4,
			postinstall = 5,
			};

			pub const PkgOptions = extern struct {
			cache_dir: ?[*:0]const u8 = null,
			registry_url: ?[*:0]const u8 = null,
			max_connections: u32 = 6,
			progress_callback: ProgressCallback = null,
			user_data: ?*anyopaque = null,
			verbose: bool = false,
			};

			pub const CacheStats = extern struct {
			total_size: u64,
			db_size: u64,
			package_count: u32,
			};

			pub const AddedPackage = extern struct {
			name: [*:0]const u8,
			version: [*:0]const u8,
			direct: bool,
			};

			pub const InstallResult = extern struct {
			package_count: u32,
			cache_hits: u32,
			cache_misses: u32,
			files_linked: u32,
			files_copied: u32,
			packages_installed: u32,
			packages_skipped: u32,
			elapsed_ms: u64,
			};

			pub const LifecycleScript = extern struct {
			name: [*:0]const u8,
			script: [*:0]const u8,
			};

			const PkgInfo = extern struct {
			name: [*:0]const u8,
			version: [*:0]const u8,
			description: [*:0]const u8,
			license: [*:0]const u8,
			homepage: [*:0]const u8,
			tarball: [*:0]const u8,
			shasum: [*:0]const u8,
			integrity: [*:0]const u8,
			keywords: [*:0]const u8,
			published: [*:0]const u8,
			dep_count: u32,
			version_count: u32,
			unpacked_size: u64,
			};

			const DistTag = extern struct {
			tag: [*:0]const u8,
			version: [*:0]const u8,
			};

			const Maintainer = extern struct {
			name: [*:0]const u8,
			email: [*:0]const u8,
			};

			const Dependency = extern struct {
			name: [*:0]const u8,
			version: [*:0]const u8,
			};

			pub const PkgContext = struct {
			allocator: std.mem.Allocator,
			arena_state: std.heap.ArenaAllocator,
			string_pool: intern.StringPool,
			cache_db: ?*cache.CacheDB,
			http: ?*fetcher.Fetcher,
			options: PkgOptions,
			last_error: ?[:0]u8,
			cache_dir: []const u8,
			metadata_cache: std.StringHashMap(resolver.PackageMetadata),
			last_install_result: InstallResult,
			added_packages: std.ArrayListUnmanaged(AddedPackage),
			added_packages_storage: std.ArrayListUnmanaged([:0]u8),
			lifecycle_scripts: std.ArrayListUnmanaged(LifecycleScript),
			lifecycle_scripts_storage: std.ArrayListUnmanaged([:0]u8),
			info_dist_tags: std.ArrayListUnmanaged(DistTag),
			info_maintainers: std.ArrayListUnmanaged(Maintainer),
			info_dependencies: std.ArrayListUnmanaged(Dependency),
			info_storage: std.ArrayListUnmanaged([:0]u8),

			pub fn init(allocator: std.mem.Allocator, options: PkgOptions) !*PkgContext {
			const ctx = try allocator.create(PkgContext);
			errdefer allocator.destroy(ctx);

			const default_cache_path = if (options.cache_dir == null)
			try getDefaultCacheDir(allocator) else null;

			defer { if (default_cache_path) \|path\| allocator.free(path); }
			const cache_path = if (options.cache_dir) \|dir\| std.mem.span(dir) else default_cache_path.?;

			ctx.* = .{
			.allocator = allocator,
			.arena_state = std.heap.ArenaAllocator.init(allocator),
			.string_pool = intern.StringPool.init(allocator),
			.cache_db = null,
			.http = null,
			.options = options,
			.last_error = null,
			.cache_dir = try allocator.dupe(u8, cache_path),
			.metadata_cache = std.StringHashMap(resolver.PackageMetadata).init(allocator),
			.last_install_result = .{
			.package_count = 0,
			.cache_hits = 0,
			.cache_misses = 0,
			.files_linked = 0,
			.files_copied = 0,
			.packages_installed = 0,
			.packages_skipped = 0,
			.elapsed_ms = 0
			},
			.added_packages = .{},
			.added_packages_storage = .{},
			.lifecycle_scripts = .{},
			.lifecycle_scripts_storage = .{},
			.info_dist_tags = .{},
			.info_maintainers = .{},
			.info_dependencies = .{},
			.info_storage = .{},
			};

			debug.enabled = options.verbose;
			debug.log("init: cache_dir={s}", .{ctx.cache_dir});
			ctx.cache_db = cache.CacheDB.open(ctx.cache_dir) catch \|err\| {
			ctx.setErrorFmt("Failed to open cache database: {}", .{err});
			return error.CacheError;
			};

			debug.log("init: cache database opened", .{});
			const registry = if (options.registry_url) \|url\|
			std.mem.span(url)
			else
			"registry.npmjs.org";

			ctx.http = fetcher.Fetcher.init(allocator, registry) catch \|err\| {
			ctx.setErrorFmt("Failed to initialize fetcher: {}", .{err});
			return error.NetworkError;
			};
			debug.log("init: http fetcher ready, registry={s}", .{registry});

			return ctx;
			}

			pub fn deinit(self: *PkgContext) void {
			if (self.http) \|h\| h.deinit();
			if (self.cache_db) \|db\| db.close();
			var meta_iter = self.metadata_cache.valueIterator();
			while (meta_iter.next()) \|meta\| meta.deinit();
			self.metadata_cache.deinit();
			self.string_pool.deinit();
			self.arena_state.deinit();
			if (self.last_error) \|e\| self.allocator.free(e);
			for (self.added_packages_storage.items) \|s\| self.allocator.free(s);
			self.added_packages_storage.deinit(self.allocator);
			self.added_packages.deinit(self.allocator);
			for (self.lifecycle_scripts_storage.items) \|s\| self.allocator.free(s);
			self.lifecycle_scripts_storage.deinit(self.allocator);
			self.lifecycle_scripts.deinit(self.allocator);
			for (self.info_storage.items) \|s\| self.allocator.free(s);
			self.info_storage.deinit(self.allocator);
			self.info_dist_tags.deinit(self.allocator);
			self.info_maintainers.deinit(self.allocator);
			self.info_dependencies.deinit(self.allocator);
			self.allocator.free(self.cache_dir);
			self.allocator.destroy(self);
			}

			pub fn setErrorFmt(self: *PkgContext, comptime fmt: []const u8, args: anytype) void {
			if (self.last_error) \|e\| self.allocator.free(e);
			self.last_error = std.fmt.allocPrintSentinel(self.allocator, fmt, args, 0) catch null;
			}

			pub fn setError(self: *PkgContext, msg: []const u8) void {
			if (self.last_error) \|e\| self.allocator.free(e);
			self.last_error = self.allocator.dupeZ(u8, msg) catch null;
			}

			fn getDefaultCacheDir(allocator: std.mem.Allocator) ![]const u8 {
			if (builtin.os.tag != .windows) {
			if (try getLegacyAntDirIfExists(allocator)) \|dir\| {
			defer allocator.free(dir);
			return std.fmt.allocPrint(allocator, "{s}/pkg", .{dir});
			}
			if (getAbsoluteEnv("XDG_CACHE_HOME")) \|base\| {
			return std.fmt.allocPrint(allocator, "{s}/ant/pkg", .{base});
			}
			const home = try getHomeDir(allocator);
			defer allocator.free(home);
			return std.fmt.allocPrint(allocator, "{s}/.cache/ant/pkg", .{home});
			}

			const home = try getHomeDir(allocator);
			defer allocator.free(home);
			return std.fmt.allocPrint(allocator, "{s}/.ant/pkg", .{home});
			}

			fn reportProgress(self: *PkgContext, phase: Phase, current: u32, total: u32, message: [:0]const u8) void {
			if (self.options.progress_callback) \|cb\| {
			cb(self.options.user_data, phase, current, total, message.ptr);
			}
			}

			fn clearAddedPackages(self: *PkgContext) void {
			for (self.added_packages_storage.items) \|s\| self.allocator.free(s);
			self.added_packages_storage.clearRetainingCapacity();
			self.added_packages.clearRetainingCapacity();
			}

			fn clearLifecycleScripts(self: *PkgContext) void {
			for (self.lifecycle_scripts_storage.items) \|s\| self.allocator.free(s);
			self.lifecycle_scripts_storage.clearRetainingCapacity();
			self.lifecycle_scripts.clearRetainingCapacity();
			}

			fn clearInfo(self: *PkgContext) void {
			for (self.info_storage.items) \|s\| self.allocator.free(s);
			self.info_storage.clearRetainingCapacity();
			self.info_dist_tags.clearRetainingCapacity();
			self.info_maintainers.clearRetainingCapacity();
			self.info_dependencies.clearRetainingCapacity();
			}

			fn storeInfoString(self: PkgContext, str: []const u8) ![:0]const u8 {
			const z = try self.allocator.dupeZ(u8, str);
			try self.info_storage.append(self.allocator, z);
			return z.ptr;
			}

			fn addLifecycleScript(self: *PkgContext, name: []const u8, script: []const u8) !void {
			const name_z = try self.allocator.dupeZ(u8, name);
			errdefer self.allocator.free(name_z);
			const script_z = try self.allocator.dupeZ(u8, script);
			errdefer self.allocator.free(script_z);

			try self.lifecycle_scripts_storage.append(self.allocator, name_z);
			try self.lifecycle_scripts_storage.append(self.allocator, script_z);
			try self.lifecycle_scripts.append(self.allocator, .{
			.name = name_z.ptr,
			.script = script_z.ptr,
			});
			}

			fn addPackageToResults(self: *PkgContext, name: []const u8, version: []const u8, direct: bool) !void {
			for (self.added_packages.items) \|pkg\| {
			if (std.mem.eql(u8, std.mem.span(pkg.name), name)) return;
			}

			const name_z = try self.allocator.dupeZ(u8, name);
			errdefer self.allocator.free(name_z);
			const version_z = try self.allocator.dupeZ(u8, version);
			errdefer self.allocator.free(version_z);

			try self.added_packages_storage.append(self.allocator, name_z);
			try self.added_packages_storage.append(self.allocator, version_z);
			try self.added_packages.append(self.allocator, .{
			.name = name_z.ptr,
			.version = version_z.ptr,
			.direct = direct,
			});
			}

			pub fn install(self: *PkgContext, lockfile_path: []const u8, node_modules_path: []const u8) !void {
			_ = self.arena_state.reset(.retain_capacity);
			const arena_alloc = self.arena_state.allocator();

			self.clearAddedPackages();

			var timer = std.time.Timer.start() catch return error.OutOfMemory;
			var stage_start: u64 = @intCast(std.time.nanoTimestamp());

			debug.log("install start: lockfile={s} node_modules={s}", .{ lockfile_path, node_modules_path });

			var lf = lockfile.Lockfile.open(lockfile_path) catch {
			self.setError("Failed to open lockfile");
			return error.InvalidLockfile;
			};
			defer lf.close();

			const pkg_count = lf.header.package_count;
			stage_start = debug.timer("lockfile open", stage_start);
			debug.log(" packages in lockfile: {d}", .{pkg_count});

			var integrities = try arena_alloc.alloc([64]u8, pkg_count);
			for (lf.packages, 0..) \|pkg, i\| {
			integrities[i] = pkg.integrity;
			}

			const db = self.cache_db orelse return error.CacheError;
			var cache_hits = try db.batchLookup(integrities, arena_alloc);
			defer cache_hits.deinit();
			stage_start = debug.timer("cache lookup", stage_start);

			var hit_set = std.AutoHashMap(u32, u32).init(arena_alloc);
			for (cache_hits.items) \|hit\| {
			try hit_set.put(hit.index, hit.file_count);
			}

			var misses = std.ArrayListUnmanaged(u32){};
			for (0..pkg_count) \|i\| {
			if (!hit_set.contains(@intCast(i))) {
			try misses.append(arena_alloc, @intCast(i));
			}
			}
			debug.log(" cache hits: {d}, misses: {d}", .{ cache_hits.items.len, misses.items.len });

			std.sort.heap(cache.CacheDB.BatchHit, cache_hits.items, &lf, batchHitLessThanParentFirst);

			var pkg_linker = linker.Linker.init(self.allocator);
			defer pkg_linker.deinit();
			try pkg_linker.setNodeModulesPath(node_modules_path);

			for (cache_hits.items, 0..) \|hit, i\| {
			const pkg = &lf.packages[hit.index];
			const pkg_name = pkg.name.slice(lf.string_table);
			const cache_path = try db.getPackagePath(&pkg.integrity, arena_alloc);
			const parent_path = pkg.parent_path.slice(lf.string_table);

			const msg = std.fmt.allocPrintSentinel(arena_alloc, "{s}", .{pkg_name}, 0) catch continue;
			self.reportProgress(.linking, @intCast(i), @intCast(cache_hits.items.len), msg);

			try pkg_linker.linkPackage(.{
			.cache_path = cache_path,
			.node_modules_path = node_modules_path,
			.name = pkg_name,
			.parent_path = if (parent_path.len > 0) parent_path else null,
			.file_count = hit.file_count,
			.has_bin = pkg.flags.has_bin,
			});

			if (pkg.flags.direct) {
			const version_str = pkg.versionString(arena_alloc, lf.string_table) catch continue;
			self.addPackageToResults(pkg_name, version_str, true) catch {};
			}
			}
			stage_start = debug.timer("link cache hits", stage_start);

			if (misses.items.len > 0) {
			const http = self.http orelse return error.NetworkError;
			const PkgExtractCtx = struct {
			ext: *extractor.Extractor,
			pkg_idx: u32,
			integrity: [64]u8,
			cache_path: []const u8,
			pkg_name: []const u8,
			version_str: []const u8,
			direct: bool,
			parent_path: ?[]const u8,
			has_bin: bool,
			completed: bool,
			has_error: bool,
			};

			var extract_contexts = try arena_alloc.alloc(PkgExtractCtx, misses.items.len);
			var valid_count: usize = 0;

			debug.log("queuing {d} tarball fetches...", .{misses.items.len});

			for (misses.items, 0..) \|pkg_idx, i\| {
			const pkg = &lf.packages[pkg_idx];
			const pkg_name = pkg.name.slice(lf.string_table);
			const tarball_url = pkg.tarball_url.slice(lf.string_table);
			const version_str = pkg.versionString(arena_alloc, lf.string_table) catch continue;
			const cache_path = db.getPackagePath(&pkg.integrity, arena_alloc) catch continue;

			const msg = std.fmt.allocPrintSentinel(arena_alloc, "{s}", .{pkg_name}, 0) catch continue;
			self.reportProgress(.fetching, @intCast(i), @intCast(misses.items.len), msg);

			if (self.options.verbose) {
			debug.log(" queue: {s}@{s}", .{ pkg_name, version_str });
			}

			const ext = extractor.Extractor.init(self.allocator, cache_path) catch continue;
			const parent_path_str = pkg.parent_path.slice(lf.string_table);

			extract_contexts[valid_count] = .{
			.ext = ext,
			.pkg_idx = pkg_idx,
			.integrity = pkg.integrity,
			.cache_path = cache_path,
			.pkg_name = pkg_name,
			.version_str = version_str,
			.direct = pkg.flags.direct,
			.parent_path = if (parent_path_str.len > 0) parent_path_str else null,
			.has_bin = pkg.flags.has_bin,
			.completed = false,
			.has_error = false,
			};

			http.fetchTarball(tarball_url, fetcher.StreamHandler.init(
			struct {
			fn onData(data: []const u8, user_data: ?*anyopaque) void {
			const ctx: *PkgExtractCtx = @ptrCast(@alignCast(user_data));
			ctx.ext.feedCompressed(data) catch {
			ctx.has_error = true;
			};
			}
			}.onData,
			struct {
			fn onComplete(_: u16, user_data: ?*anyopaque) void {
			const ctx: *PkgExtractCtx = @ptrCast(@alignCast(user_data));
			ctx.completed = true;
			}
			}.onComplete,
			struct {
			fn onError(_: fetcher.FetchError, user_data: ?*anyopaque) void {
			const ctx: *PkgExtractCtx = @ptrCast(@alignCast(user_data));
			ctx.has_error = true;
			ctx.completed = true;
			}
			}.onError,
			&extract_contexts[valid_count],
			)) catch continue;

			valid_count += 1;
			}

			stage_start = debug.timer("queue fetches", stage_start);
			debug.log("running event loop for {d} fetches...", .{valid_count});

			http.run() catch {};
			stage_start = debug.timer("fetch + extract", stage_start);

			var success_count: usize = 0;
			var error_count: usize = 0;
			std.sort.heap(PkgExtractCtx, extract_contexts[0..valid_count], {}, struct {
			fn lessThan(_: void, a: PkgExtractCtx, b: PkgExtractCtx) bool {
			const depth_a = linkPathDepth(a.parent_path);
			const depth_b = linkPathDepth(b.parent_path);
			if (depth_a != depth_b) return depth_a < depth_b;

			const parent_a = a.parent_path orelse "";
			const parent_b = b.parent_path orelse "";
			const parent_order = std.mem.order(u8, parent_a, parent_b);
			if (parent_order != .eq) return parent_order == .lt;
			return std.mem.order(u8, a.pkg_name, b.pkg_name) == .lt;
			}
			}.lessThan);

			for (extract_contexts[0..valid_count], 0..) \|*ctx, i\| {
			defer ctx.ext.deinit();

			if (ctx.has_error) {
			error_count += 1;
			debug.log(" error: {s}", .{ctx.pkg_name});
			continue;
			}
			success_count += 1;

			const msg = std.fmt.allocPrintSentinel(arena_alloc, "{s}", .{ctx.pkg_name}, 0) catch continue;
			self.reportProgress(.linking, @intCast(i), @intCast(valid_count), msg);

			const stats = ctx.ext.stats();
			if (stats.files >= 100) {
			debug.log(" extracted {s}: {d} files, {d} bytes", .{ ctx.pkg_name, stats.files, stats.bytes });
			}

			db.insert(&.{
			.integrity = ctx.integrity,
			.path = ctx.cache_path,
			.unpacked_size = stats.bytes,
			.file_count = stats.files,
			.cached_at = std.time.timestamp(),
			}, ctx.pkg_name, ctx.version_str) catch continue;

			self.addPackageToResults(ctx.pkg_name, ctx.version_str, ctx.direct) catch {};

			pkg_linker.linkPackage(.{
			.cache_path = ctx.cache_path,
			.node_modules_path = node_modules_path,
			.name = ctx.pkg_name,
			.parent_path = ctx.parent_path,
			.file_count = stats.files,
			.has_bin = ctx.has_bin,
			}) catch {};
			}
			stage_start = debug.timer("cache insert + link misses", stage_start);
			debug.log(" fetched: {d} success, {d} errors", .{ success_count, error_count });
			}

			db.sync();
			stage_start = debug.timer("cache sync", stage_start);

			const link_stats = pkg_linker.getStats();
			self.last_install_result = .{
			.package_count = pkg_count,
			.cache_hits = @intCast(cache_hits.items.len),
			.cache_misses = @intCast(misses.items.len),
			.files_linked = link_stats.files_linked,
			.files_copied = link_stats.files_copied,
			.packages_installed = link_stats.packages_installed,
			.packages_skipped = link_stats.packages_skipped,
			.elapsed_ms = timer.read() / 1_000_000,
			};
			}
			};

			fn trySetHttpResolveError(c: *PkgContext, err: anyerror) bool {
			if (err != error.ResponseError) return false;

			const http = c.http orelse return false;
			const info = http.getLastHttpError() orelse return false;

			c.setErrorFmt("error: GET {s} - {d}", .{ info.url, info.status });
			return true;
			}

			fn setResolveError(c: *PkgContext, target: ?[]const u8, err: anyerror) void {
			if (trySetHttpResolveError(c, err)) return;

			if (target) \|name\| c.setErrorFmt("Failed to resolve {s}: {}", .{ name, err })
			else c.setErrorFmt("Failed to resolve dependencies: {}", .{ err });
			}

			fn linkPathDepth(parent_path: ?[]const u8) u32 {
			const parent = parent_path orelse return 0;
			if (parent.len == 0) return 0;

			var depth: u32 = 1;
			var it: usize = 0;
			while (std.mem.indexOfPos(u8, parent, it, "/node_modules/")) \|idx\| {
			depth += 1;
			it = idx + "/node_modules/".len;
			}
			return depth;
			}

			fn packageLinkLessThanParentFirst(_: void, a: linker.PackageLink, b: linker.PackageLink) bool {
			const a_depth = linkPathDepth(a.parent_path);
			const b_depth = linkPathDepth(b.parent_path);
			if (a_depth != b_depth) return a_depth < b_depth;

			const a_parent = a.parent_path orelse "";
			const b_parent = b.parent_path orelse "";
			const parent_order = std.mem.order(u8, a_parent, b_parent);
			if (parent_order != .eq) return parent_order == .lt;

			return std.mem.order(u8, a.name, b.name) == .lt;
			}

			fn batchHitLessThanParentFirst(lf: *const lockfile.Lockfile, a: cache.CacheDB.BatchHit, b: cache.CacheDB.BatchHit) bool {
			const pkg_a = &lf.packages[a.index];
			const pkg_b = &lf.packages[b.index];

			const parent_a = pkg_a.parent_path.slice(lf.string_table);
			const parent_b = pkg_b.parent_path.slice(lf.string_table);
			const depth_a = linkPathDepth(if (parent_a.len > 0) parent_a else null);
			const depth_b = linkPathDepth(if (parent_b.len > 0) parent_b else null);
			if (depth_a != depth_b) return depth_a < depth_b;

			const name_a = pkg_a.name.slice(lf.string_table);
			const name_b = pkg_b.name.slice(lf.string_table);
			const parent_order = std.mem.order(u8, parent_a, parent_b);
			if (parent_order != .eq) return parent_order == .lt;
			return std.mem.order(u8, name_a, name_b) == .lt;
			}

			export fn pkg_init(options: const PkgOptions) ?PkgContext {
			return PkgContext.init(global_allocator, options.*) catch null;
			}

			export fn pkg_free(ctx: ?*PkgContext) void {
			if (ctx) \|c\| c.deinit();
			}

			export fn pkg_install(
			ctx: ?*PkgContext,
			package_json_path: [*:0]const u8,
			lockfile_path: [*:0]const u8,
			node_modules_path: [*:0]const u8,
			) PkgError {
			const c = ctx orelse return .invalid_argument;

			_ = c.arena_state.reset(.retain_capacity);
			const arena_alloc = c.arena_state.allocator();

			c.install(
			std.mem.span(lockfile_path),
			std.mem.span(node_modules_path),
			) catch \|err\| {
			return switch (err) {
			error.InvalidLockfile => .invalid_lockfile,
			error.CacheError => .cache_error,
			error.NetworkError => .network_error,
			error.OutOfMemory => .out_of_memory,
			else => .io_error,
			};
			};

			var pkg_json = json.PackageJson.parse(arena_alloc, std.mem.span(package_json_path)) catch return .ok;
			defer pkg_json.deinit(arena_alloc);
			if (pkg_json.trusted_dependencies.count() > 0) {
			runTrustedPostinstall(c, &pkg_json.trusted_dependencies, std.mem.span(node_modules_path), arena_alloc);
			}

			return .ok;
			}

			export fn pkg_get_install_result(ctx: ?PkgContext, out: InstallResult) PkgError {
			const c = ctx orelse return .invalid_argument;
			out.* = c.last_install_result;
			return .ok;
			}

			export fn pkg_get_added_count(ctx: ?*const PkgContext) u32 {
			const c = ctx orelse return 0;
			return @intCast(c.added_packages.items.len);
			}

			export fn pkg_get_added_package(ctx: ?const PkgContext, index: u32, out: AddedPackage) PkgError {
			const c = ctx orelse return .invalid_argument;
			if (index >= c.added_packages.items.len) return .invalid_argument;
			out.* = c.added_packages.items[index];
			return .ok;
			}

			export fn pkg_get_latest_available_version(
			ctx: ?*PkgContext,
			package_name: [*:0]const u8,
			installed_version: [*:0]const u8,
			out_version: [*]u8,
			out_version_len: usize,
			) c_int {
			const c = ctx orelse return 0;
			if (out_version_len == 0) return 0;
			out_version[0] = 0;

			const name = std.mem.span(package_name);
			const installed_str = std.mem.span(installed_version);
			const installed = resolver.Version.parse(installed_str) catch return 0;
			const meta = c.metadata_cache.get(name) orelse return 0;

			var best: ?*const resolver.VersionInfo = null;
			for (meta.versions.items) \|*v\| {
			if (v.version.prerelease != null) continue;
			if (!v.matchesPlatform()) continue;
			if (best == null or v.version.order(best.?.version) == .gt) best = v;
			}
			if (best == null) {
			for (meta.versions.items) \|*v\| {
			if (!v.matchesPlatform()) continue;
			if (best == null or v.version.order(best.?.version) == .gt) best = v;
			}
			}

			const latest = best orelse return 0;
			if (latest.version.order(installed) != .gt) return 0;

			if (latest.version_str.len + 1 > out_version_len) return 0;
			@memcpy(out_version[0..latest.version_str.len], latest.version_str);
			out_version[latest.version_str.len] = 0;
			return 1;
			}

			export fn pkg_count_installed(node_modules_path: [*:0]const u8) u32 {
			const nm_path = std.mem.span(node_modules_path);
			if (!std.mem.endsWith(u8, nm_path, "node_modules")) return 0;

			const base = nm_path[0 .. nm_path.len - "node_modules".len];
			var buf: [std.fs.max_path_bytes]u8 = undefined;
			const lp = std.fmt.bufPrint(&buf, "{s}ant.lockb", .{base}) catch return 0;

			var lf = lockfile.Lockfile.open(lp) catch return 0;
			defer lf.close();
			return lf.header.package_count;
			}

			export fn pkg_discover_lifecycle_scripts(
			ctx: ?*PkgContext,
			node_modules_path: [*:0]const u8,
			) PkgError {
			const c = ctx orelse return .invalid_argument;
			c.clearLifecycleScripts();

			const nm_path = std.mem.span(node_modules_path);
			var nm_dir = std.fs.cwd().openDir(nm_path, .{ .iterate = true }) catch return .io_error;
			defer nm_dir.close();

			var iter = nm_dir.iterate();
			while (iter.next() catch null) \|entry\| {
			if (entry.kind != .directory) continue;
			if (entry.name[0] == '@') {
			var scope_dir = nm_dir.openDir(entry.name, .{ .iterate = true }) catch continue;
			defer scope_dir.close();
			var scope_iter = scope_dir.iterate();
			while (scope_iter.next() catch null) \|scoped_entry\| {
			if (scoped_entry.kind != .directory) continue;
			const full_name = std.fmt.allocPrint(c.allocator, "@{s}/{s}", .{ entry.name[1..], scoped_entry.name }) catch continue;
			defer c.allocator.free(full_name);
			discoverPackageScript(c, nm_path, full_name, scope_dir, scoped_entry.name);
			}
			} else {
			discoverPackageScript(c, nm_path, entry.name, nm_dir, entry.name);
			}
			}

			return .ok;
			}

			fn discoverPackageScript(ctx: *PkgContext, nm_path: []const u8, pkg_name: []const u8, parent_dir: std.fs.Dir, dir_name: []const u8) void {
			var pkg_dir = parent_dir.openDir(dir_name, .{}) catch return;
			defer pkg_dir.close();

			pkg_dir.access(".postinstall", .{}) catch \|err\| {
			if (err != error.FileNotFound) return;
			const pkg_json = pkg_dir.openFile("package.json", .{}) catch return;
			defer pkg_json.close();

			const content = pkg_json.readToEndAlloc(ctx.allocator, 1024 * 1024) catch return;
			defer ctx.allocator.free(content);

			var doc = json.JsonDoc.parse(content) catch return;
			defer doc.deinit();

			const root = doc.root();
			if (root.getObject("scripts")) \|scripts\| {
			const script = scripts.getString("postinstall") orelse
			scripts.getString("install") orelse return;

			if (std.mem.eql(u8, pkg_name, "esbuild")) return;
			ctx.addLifecycleScript(pkg_name, script) catch return;
			}
			return;
			};
			_ = nm_path;
			}

			export fn pkg_get_lifecycle_script_count(ctx: ?*const PkgContext) u32 {
			const c = ctx orelse return 0;
			return @intCast(c.lifecycle_scripts.items.len);
			}

			export fn pkg_get_lifecycle_script(ctx: ?const PkgContext, index: u32, out: LifecycleScript) PkgError {
			const c = ctx orelse return .invalid_argument;
			if (index >= c.lifecycle_scripts.items.len) return .invalid_argument;
			out.* = c.lifecycle_scripts.items[index];
			return .ok;
			}

			export fn pkg_run_postinstall(
			ctx: ?*PkgContext,
			node_modules_path: [*:0]const u8,
			package_names: []const [:0]const u8,
			count: u32,
			) PkgError {
			const c = ctx orelse return .invalid_argument;
			_ = c.arena_state.reset(.retain_capacity);
			const arena_alloc = c.arena_state.allocator();

			var trusted = std.StringHashMap(void).init(arena_alloc);
			for (0..count) \|i\| {
			trusted.put(std.mem.span(package_names[i]), {}) catch continue;
			}

			runTrustedPostinstall(c, &trusted, std.mem.span(node_modules_path), arena_alloc);
			return .ok;
			}

			export fn pkg_add_trusted_dependencies(
			package_json_path: [*:0]const u8,
			package_names: []const [:0]const u8,
			count: u32,
			) PkgError {
			const allocator = std.heap.c_allocator;
			const path = std.mem.span(package_json_path);
			const path_z = package_json_path;

			debug.log("[trust] pkg_add_trusted_dependencies: path={s} count={d}", .{ path, count });

			const file = std.fs.cwd().openFile(path, .{ .mode = .read_write }) catch \|err\| {
			debug.log("[trust] failed to open file: {}", .{err});
			return .io_error;
			};
			defer file.close();

			const content = file.readToEndAlloc(allocator, 10 * 1024 * 1024) catch \|err\| {
			debug.log("[trust] failed to read file: {}", .{err});
			return .io_error;
			};
			defer allocator.free(content);

			debug.log("[trust] read {d} bytes from package.json", .{content.len});

			const doc = json.yyjson.yyjson_read(content.ptr, content.len, 0);
			if (doc == null) {
			debug.log("[trust] failed to parse JSON", .{});
			return .io_error;
			}
			defer json.yyjson.yyjson_doc_free(doc);

			const mdoc = json.yyjson.yyjson_doc_mut_copy(doc, null);
			if (mdoc == null) {
			debug.log("[trust] failed to create mutable doc", .{});
			return .out_of_memory;
			}
			defer json.yyjson.yyjson_mut_doc_free(mdoc);

			const root = json.yyjson.yyjson_mut_doc_get_root(mdoc);
			if (root == null) {
			debug.log("[trust] failed to get root", .{});
			return .io_error;
			}

			var trusted_arr = json.yyjson.yyjson_mut_obj_get(root, "trustedDependencies");
			if (trusted_arr == null) {
			debug.log("[trust] creating new trustedDependencies array", .{});
			trusted_arr = json.yyjson.yyjson_mut_arr(mdoc);
			if (trusted_arr == null) {
			debug.log("[trust] failed to create array", .{});
			return .out_of_memory;
			}
			_ = json.yyjson.yyjson_mut_obj_add_val(mdoc, root, "trustedDependencies", trusted_arr);
			} else {
			debug.log("[trust] trustedDependencies array already exists", .{});
			}

			var string_copies = std.ArrayListUnmanaged([:0]u8){};
			defer {
			for (string_copies.items) \|s\| allocator.free(s);
			string_copies.deinit(allocator);
			}

			var added: u32 = 0;
			for (0..count) \|i\| {
			const pkg_name = std.mem.span(package_names[i]);
			var exists = false;

			var iter = json.yyjson.yyjson_mut_arr_iter{};
			_ = json.yyjson.yyjson_mut_arr_iter_init(trusted_arr, &iter);
			while (json.yyjson.yyjson_mut_arr_iter_next(&iter)) \|val\| {
			if (json.yyjson.yyjson_mut_is_str(val)) {
			const existing = json.yyjson.yyjson_mut_get_str(val);
			if (existing != null and std.mem.eql(u8, std.mem.span(existing.?), pkg_name)) {
			exists = true; break;
			}
			}
			}

			if (!exists) {
			const name_copy = allocator.dupeZ(u8, pkg_name) catch continue;
			string_copies.append(allocator, name_copy) catch {
			allocator.free(name_copy);
			continue;
			};
			const val = json.yyjson.yyjson_mut_str(mdoc, name_copy.ptr);
			if (val != null) {
			_ = json.yyjson.yyjson_mut_arr_append(trusted_arr, val);
			added += 1;
			debug.log("[trust] added {s}", .{pkg_name});
			}
			} else {
			debug.log("[trust] {s} already in trustedDependencies", .{pkg_name});
			}
			}
			debug.log("[trust] added {d} packages, writing file", .{added});

			var write_err: json.yyjson.yyjson_write_err = undefined;
			const flags = json.yyjson.YYJSON_WRITE_PRETTY_TWO_SPACES \| json.yyjson.YYJSON_WRITE_ESCAPE_UNICODE;
			const written = json.yyjson.yyjson_mut_write_file(path_z, mdoc, flags, null, &write_err);
			if (!written) {
			const msg = if (write_err.msg) \|m\| std.mem.span(m) else "unknown";
			debug.log("[trust] failed to write file: code={d} msg={s}", .{ write_err.code, msg });
			return .io_error;
			}

			debug.log("[trust] successfully wrote package.json", .{});
			return .ok;
			}

			const InterleavedExtractCtx = struct {
			ext: *extractor.Extractor,
			integrity: [64]u8,
			cache_path: []const u8,
			pkg_name: []const u8,
			version_str: []const u8,
			direct: bool,
			parent_path: ?[]const u8,
			has_bin: bool,
			completed: bool,
			has_error: bool,
			queued: bool,
			parent: *InterleavedContext,
			};

			const InterleavedContext = struct {
			allocator: std.mem.Allocator,
			arena_alloc: std.mem.Allocator,
			db: *cache.CacheDB,
			http: *fetcher.Fetcher,
			pkg_ctx: *PkgContext,
			extract_contexts: std.ArrayListUnmanaged(*InterleavedExtractCtx),
			queued_integrities: std.AutoHashMap([64]u8, void),
			callbacks_received: usize,
			integrity_duplicates: usize,
			cache_hits: usize,
			tarballs_queued: usize,
			tarballs_completed: std.atomic.Value(u32),

			fn init(allocator: std.mem.Allocator, arena_alloc: std.mem.Allocator, db: cache.CacheDB, http: fetcher.Fetcher, pkg_ctx: *PkgContext) InterleavedContext {
			return .{
			.allocator = allocator,
			.arena_alloc = arena_alloc,
			.db = db,
			.http = http,
			.pkg_ctx = pkg_ctx,
			.extract_contexts = .{},
			.queued_integrities = std.AutoHashMap([64]u8, void).init(arena_alloc),
			.callbacks_received = 0,
			.integrity_duplicates = 0,
			.cache_hits = 0,
			.tarballs_queued = 0,
			.tarballs_completed = std.atomic.Value(u32).init(0),
			};
			}

			fn deinit(self: *InterleavedContext) void {
			self.extract_contexts.deinit(self.arena_alloc);
			self.queued_integrities.deinit();
			}

			fn onPackageResolved(pkg: const resolver.ResolvedPackage, user_data: ?anyopaque) void {
			const self: *InterleavedContext = @ptrCast(@alignCast(user_data));
			self.callbacks_received += 1;

			const pkg_name = pkg.name.slice();
			const current: u32 = @intCast(self.callbacks_received);
			const msg = std.fmt.allocPrintSentinel(self.arena_alloc, "{s}", .{pkg_name}, 0) catch return;
			self.pkg_ctx.reportProgress(.resolving, current, current, msg);

			if (self.queued_integrities.contains(pkg.integrity)) {
			self.integrity_duplicates += 1; return;
			} self.queued_integrities.put(pkg.integrity, {}) catch return;

			if (self.db.hasIntegrity(&pkg.integrity)) {
			self.cache_hits += 1; return;
			} self.tarballs_queued += 1;

			const cache_path = self.db.getPackagePath(&pkg.integrity, self.arena_alloc) catch return;
			const version_str = pkg.version.format(self.arena_alloc) catch return;

			const ext = extractor.Extractor.init(self.allocator, cache_path) catch return;
			const ctx = self.arena_alloc.create(InterleavedExtractCtx) catch {
			ext.deinit(); return;
			};

			ctx.* = .{
			.ext = ext,
			.integrity = pkg.integrity,
			.cache_path = cache_path,
			.pkg_name = pkg.name.slice(),
			.version_str = version_str,
			.direct = pkg.direct,
			.parent_path = pkg.parent_path,
			.has_bin = pkg.has_bin,
			.completed = false,
			.has_error = false,
			.queued = false,
			.parent = self,
			};

			self.http.fetchTarball(pkg.tarball_url, fetcher.StreamHandler.init(
			struct {
			fn onData(data: []const u8, ud: ?*anyopaque) void {
			const c: *InterleavedExtractCtx = @ptrCast(@alignCast(ud));
			if (c.has_error) return;
			c.ext.feedCompressed(data) catch { c.has_error = true; };
			}
			}.onData,
			struct {
			fn onComplete(_: u16, ud: ?*anyopaque) void {
			const c: *InterleavedExtractCtx = @ptrCast(@alignCast(ud));
			c.completed = true;

			const completed = c.parent.tarballs_completed.fetchAdd(1, .monotonic) + 1;
			const total: u32 = @intCast(c.parent.tarballs_queued);

			var msg_buf: [256]u8 = undefined;
			const msg_len = std.fmt.bufPrint(&msg_buf, "{s}", .{c.pkg_name}) catch return;

			msg_buf[msg_len.len] = 0;
			c.parent.pkg_ctx.reportProgress(.fetching, completed, total, msg_buf[0..msg_len.len :0]);
			}
			}.onComplete,
			struct {
			fn onError(_: fetcher.FetchError, ud: ?*anyopaque) void {
			const c: *InterleavedExtractCtx = @ptrCast(@alignCast(ud));
			c.has_error = true;
			c.completed = true;
			}
			}.onError,
			ctx,
			)) catch {
			ext.deinit();
			self.arena_alloc.destroy(ctx);
			return;
			};

			ctx.queued = true;
			self.extract_contexts.append(self.arena_alloc, ctx) catch return;

			debug.log(" queued tarball: {s}@{s}", .{ pkg.name.slice(), version_str });
			}
			};

			export fn pkg_resolve_and_install(
			ctx: ?*PkgContext,
			package_json_path: [*:0]const u8,
			lockfile_path: [*:0]const u8,
			node_modules_path: [*:0]const u8,
			) PkgError {
			const c = ctx orelse return .invalid_argument;
			_ = c.arena_state.reset(.retain_capacity);
			const arena_alloc = c.arena_state.allocator();

			var timer = std.time.Timer.start() catch return .out_of_memory;
			var stage_start: u64 = @intCast(std.time.nanoTimestamp());

			debug.log("resolve+install (interleaved): package_json={s} lockfile={s} node_modules={s}", .{
			std.mem.span(package_json_path),
			std.mem.span(lockfile_path),
			std.mem.span(node_modules_path),
			});

			const http = c.http orelse return .network_error;
			http.resetMetaClients();
			const db = c.cache_db orelse return .cache_error;

			const pkg_json_path_z = arena_alloc.dupeZ(u8, std.mem.span(package_json_path)) catch return .out_of_memory;
			var pkg_json = json.PackageJson.parse(arena_alloc, pkg_json_path_z) catch {
			c.setError("Failed to parse package.json");
			return .io_error;
			}; defer pkg_json.deinit(arena_alloc);

			if (pkg_json.trusted_dependencies.count() > 0) {
			debug.log(" trusted dependencies: {d}", .{pkg_json.trusted_dependencies.count()});
			}

			var interleaved = InterleavedContext.init(c.allocator, arena_alloc, db, http, c);
			defer interleaved.deinit();

			var res = resolver.Resolver.init(
			arena_alloc,
			c.allocator,
			&c.string_pool,
			http,
			db,
			if (c.options.registry_url) \|url\| std.mem.span(url) else "https://registry.npmjs.org",
			&c.metadata_cache,
			); defer res.deinit();

			res.setOnPackageResolved(InterleavedContext.onPackageResolved, &interleaved);
			res.resolveFromPackageJson(std.mem.span(package_json_path)) catch \|err\| {
			setResolveError(c, null, err);
			return .resolve_error;
			};

			stage_start = debug.timer("resolve + queue tarballs", stage_start);
			debug.log(" resolved {d} packages, callbacks={d} (dupes={d}), cache hits={d}, queued={d}", .{
			res.resolved.count(),
			interleaved.callbacks_received,
			interleaved.integrity_duplicates,
			interleaved.cache_hits,
			interleaved.tarballs_queued,
			});

			var direct_iter = res.resolved.valueIterator();
			while (direct_iter.next()) \|pkg_ptr\| {
			const pkg = pkg_ptr.*;
			if (pkg.direct) {
			const version_str = pkg.version.format(arena_alloc) catch continue;
			c.addPackageToResults(pkg.name.slice(), version_str, true) catch {};
			}
			}

			var pkg_linker = linker.Linker.init(c.allocator);
			defer pkg_linker.deinit();
			pkg_linker.setNodeModulesPath(std.mem.span(node_modules_path)) catch return .io_error;

			var cache_hit_jobs = std.ArrayListUnmanaged(linker.PackageLink){};
			var pkg_iter = res.resolved.valueIterator();
			while (pkg_iter.next()) \|pkg_ptr\| {
			const pkg = pkg_ptr.*;
			if (interleaved.queued_integrities.contains(pkg.integrity)) {
			var is_download = false;
			for (interleaved.extract_contexts.items) \|ext_ctx\| {
			if (std.mem.eql(u8, &ext_ctx.integrity, &pkg.integrity)) { is_download = true; break; }
			}
			if (is_download) continue;
			}

			var cache_entry = db.lookup(&pkg.integrity) orelse continue;
			defer cache_entry.deinit();
			const cache_path = arena_alloc.dupe(u8, cache_entry.path) catch continue;

			cache_hit_jobs.append(arena_alloc, .{
			.cache_path = cache_path,
			.node_modules_path = std.mem.span(node_modules_path),
			.name = pkg.name.slice(),
			.parent_path = pkg.parent_path,
			.file_count = cache_entry.file_count,
			.has_bin = pkg.has_bin,
			}) catch continue;
			}

			var tarball_thread: ?std.Thread = null;
			if (interleaved.tarballs_queued > 0) {
			debug.log("finishing {d} tarball downloads (pending={d})...", .{
			interleaved.tarballs_queued,
			http.pending.items.len,
			});
			tarball_thread = std.Thread.spawn(.{}, struct {
			fn work(h: *fetcher.Fetcher) void { h.run() catch {}; }
			}.work, .{http}) catch \|err\| blk: {
			debug.log("warning: failed to spawn tarball thread: {}, running synchronously", .{err});
			http.run() catch {};
			break :blk null;
			};
			}

			std.sort.heap(linker.PackageLink, cache_hit_jobs.items, {}, packageLinkLessThanParentFirst);

			var linked_count: usize = 0;
			for (cache_hit_jobs.items, 0..) \|job, i\| {
			const msg = std.fmt.allocPrintSentinel(arena_alloc, "{s}", .{job.name}, 0) catch continue;
			c.reportProgress(.linking, @intCast(i), @intCast(cache_hit_jobs.items.len), msg);
			pkg_linker.linkPackage(job) catch continue;
			linked_count += 1;
			}

			if (tarball_thread) \|t\| {
			t.join();
			stage_start = debug.timer("finish tarballs + link cache hits", stage_start);
			} else stage_start = debug.timer("link cache hits", stage_start);
			debug.log(" linked {d} from cache", .{linked_count});

			res.writeLockfile(std.mem.span(lockfile_path)) catch \|err\| {
			c.setErrorFmt("Failed to write lockfile: {}", .{err});
			return .io_error;
			};
			stage_start = debug.timer("write lockfile", stage_start);

			var success_count: usize = 0;
			var error_count: usize = 0;

			const LinkJobWithSize = struct {
			job: linker.PackageLink,
			size: u64,
			};

			var cache_entries = std.ArrayListUnmanaged(cache.CacheDB.NamedCacheEntry){};
			var link_jobs = std.ArrayListUnmanaged(LinkJobWithSize){};
			const current_time = std.time.timestamp();
			const nm_path = std.mem.span(node_modules_path);

			for (interleaved.extract_contexts.items) \|ext_ctx\| {
			if (ext_ctx.has_error or !ext_ctx.completed) {
			error_count += 1;
			debug.log(" error: {s}", .{ext_ctx.pkg_name}); continue;
			}
			success_count += 1;

			const stats = ext_ctx.ext.stats();
			cache_entries.append(arena_alloc, .{
			.entry = .{
			.integrity = ext_ctx.integrity,
			.path = ext_ctx.cache_path,
			.unpacked_size = stats.bytes,
			.file_count = stats.files,
			.cached_at = current_time,
			},
			.name = ext_ctx.pkg_name,
			.version = ext_ctx.version_str,
			}) catch continue;

			link_jobs.append(arena_alloc, .{
			.job = .{
			.cache_path = ext_ctx.cache_path,
			.node_modules_path = nm_path,
			.name = ext_ctx.pkg_name,
			.parent_path = ext_ctx.parent_path,
			.file_count = stats.files,
			.has_bin = ext_ctx.has_bin,
			},
			.size = stats.bytes,
			}) catch continue;

			c.addPackageToResults(ext_ctx.pkg_name, ext_ctx.version_str, ext_ctx.direct) catch {};
			}

			for (cache_entries.items, 0..) \|entry, i\| {
			const msg = std.fmt.allocPrintSentinel(arena_alloc, "{s}", .{entry.name}, 0) catch continue;
			c.reportProgress(.caching, @intCast(i), @intCast(cache_entries.items.len), msg);
			}
			db.batchInsertNamed(cache_entries.items) catch {};
			stage_start = debug.timer("cache insert (batch)", stage_start);

			const total_jobs: u32 = @intCast(link_jobs.items.len);
			var link_counter = std.atomic.Value(u32).init(0);
			std.sort.heap(LinkJobWithSize, link_jobs.items, {}, struct {
			fn lessThan(_: void, a: LinkJobWithSize, b: LinkJobWithSize) bool {
			const depth_a = linkPathDepth(a.job.parent_path);
			const depth_b = linkPathDepth(b.job.parent_path);
			if (depth_a != depth_b) return depth_a < depth_b;
			if (a.size != b.size) return a.size > b.size;

			const parent_a = a.job.parent_path orelse "";
			const parent_b = b.job.parent_path orelse "";
			const parent_order = std.mem.order(u8, parent_a, parent_b);
			if (parent_order != .eq) return parent_order == .lt;
			return std.mem.order(u8, a.job.name, b.job.name) == .lt;
			}
			}.lessThan);

			var slow_link_count = std.atomic.Value(u32).init(0);
			var max_link_ms = std.atomic.Value(u64).init(0);
			var slow_link_names = std.ArrayListUnmanaged([]const u8){};
			defer slow_link_names.deinit(c.allocator);
			var slow_link_lock = std.Thread.Mutex{};

			var depth_start: usize = 0;
			while (depth_start < link_jobs.items.len) {
			const depth = linkPathDepth(link_jobs.items[depth_start].job.parent_path);
			var depth_end = depth_start + 1;
			while (depth_end < link_jobs.items.len and
			linkPathDepth(link_jobs.items[depth_end].job.parent_path) == depth) : (depth_end += 1) {}

			const depth_jobs = link_jobs.items[depth_start..depth_end];
			const num_threads = @min(8, depth_jobs.len);
			if (c.options.verbose and depth_jobs.len > 1) {
			debug.log(" linking depth {d} ({d} items)", .{ depth, depth_jobs.len });
			}

			if (num_threads > 1 and depth_jobs.len > 4) {
			var threads: [8]?std.Thread = .{null} ** 8;
			const jobs_per_thread = (depth_jobs.len + num_threads - 1) / num_threads;

			for (0..num_threads) \|t\| {
			const start_idx = t * jobs_per_thread;
			const end_idx = @min(start_idx + jobs_per_thread, depth_jobs.len);
			if (start_idx >= end_idx) break;

			threads[t] = std.Thread.spawn(.{}, struct {
			fn work(lnk: linker.Linker, jobs: []const LinkJobWithSize, pkg_ctx: PkgContext, total: u32, counter: std.atomic.Value(u32), slow_count: std.atomic.Value(u32), max_ms: std.atomic.Value(u64), names: std.ArrayListUnmanaged([]const u8), lock: *std.Thread.Mutex, alloc: std.mem.Allocator) void {
			for (jobs) \|job_with_size\| {
			const job = job_with_size.job;
			const current = counter.fetchAdd(1, .monotonic) + 1;
			var msg_buf: [256]u8 = undefined;
			const msg_len = std.fmt.bufPrint(&msg_buf, "{s}", .{job.name}) catch continue;
			msg_buf[msg_len.len] = 0;
			pkg_ctx.reportProgress(.linking, current, total, msg_buf[0..msg_len.len :0]);
			const start = std.time.nanoTimestamp();
			lnk.linkPackage(job) catch {};
			const delta = std.time.nanoTimestamp() - start;
			const elapsed_ms: u64 = if (delta < 0) 0 else @intCast(@as(u128, @intCast(delta)) / 1_000_000);
			if (elapsed_ms > 100) {
			_ = slow_count.fetchAdd(1, .monotonic);
			lock.lock();
			const entry = std.fmt.allocPrint(alloc, "{s} {d}ms", .{ job.name, elapsed_ms }) catch null;
			if (entry) \|val\| {
			names.append(alloc, val) catch {};
			}
			lock.unlock();
			var current_max = max_ms.load(.monotonic);
			while (elapsed_ms > current_max) : (current_max = max_ms.load(.monotonic)) {
			if (max_ms.cmpxchgWeak(current_max, elapsed_ms, .monotonic, .monotonic) == null) break;
			}
			}
			}
			}
			}.work, .{ &pkg_linker, depth_jobs[start_idx..end_idx], c, total_jobs, &link_counter, &slow_link_count, &max_link_ms, &slow_link_names, &slow_link_lock, c.allocator }) catch null;
			}

			for (&threads) \|*t\| {
			if (t.*) \|thread\| thread.join();
			}
			} else {
			for (depth_jobs) \|job_with_size\| {
			const job = job_with_size.job;
			const current = link_counter.fetchAdd(1, .monotonic) + 1;
			const msg = std.fmt.allocPrintSentinel(arena_alloc, "{s}", .{job.name}, 0) catch continue;
			c.reportProgress(.linking, current, total_jobs, msg);
			const start = std.time.nanoTimestamp();
			pkg_linker.linkPackage(job) catch {};
			const elapsed_ms: u64 = @intCast((@as(u64, @intCast(std.time.nanoTimestamp())) - @as(u64, @intCast(start))) / 1_000_000);
			if (elapsed_ms > 100 and c.options.verbose) {
			debug.log(" link slow: {s} {d}ms", .{ job.name, elapsed_ms });
			}
			}
			}

			depth_start = depth_end;
			}

			if (c.options.verbose) {
			debug.log(" link slow (>100ms): {d} max={d}ms", .{ slow_link_count.load(.monotonic), max_link_ms.load(.monotonic) });
			for (slow_link_names.items) \|entry\| {
			debug.log(" link slow: {s}", .{entry});
			}
			}

			for (slow_link_names.items) \|entry\| c.allocator.free(entry);
			stage_start = debug.timer("link downloads (parallel)", stage_start);

			debug.log(" downloaded: {d} success, {d} errors", .{ success_count, error_count });
			for (interleaved.extract_contexts.items) \|ext_ctx\| ext_ctx.ext.deinit();

			db.sync();
			_ = debug.timer("cache sync", stage_start);

			const link_stats = pkg_linker.getStats();
			c.last_install_result = .{
			.package_count = @intCast(res.resolved.count()),
			.cache_hits = @intCast(interleaved.cache_hits),
			.cache_misses = @intCast(interleaved.tarballs_queued),
			.files_linked = link_stats.files_linked,
			.files_copied = link_stats.files_copied,
			.packages_installed = link_stats.packages_installed,
			.packages_skipped = link_stats.packages_skipped,
			.elapsed_ms = timer.read() / 1_000_000,
			};

			debug.log("total: {d} packages in {d}ms", .{ res.resolved.count(), c.last_install_result.elapsed_ms });

			if (pkg_json.trusted_dependencies.count() > 0) {
			runTrustedPostinstall(c, &pkg_json.trusted_dependencies, std.mem.span(node_modules_path), arena_alloc);
			}

			return .ok;
			}

			const PostinstallJob = struct {
			pkg_name: []const u8,
			pkg_dir: []const u8,
			script: []const u8,
			child: ?std.process.Child = null,
			exit_code: ?u8 = null,
			stderr: ?[]const u8 = null,
			failed: bool = false,
			};

			fn runTrustedPostinstall(
			ctx: *PkgContext,
			trusted: *std.StringHashMap(void),
			node_modules_path: []const u8,
			allocator: std.mem.Allocator,
			) void {
			var env_map = std.process.getEnvMap(allocator) catch return;
			defer env_map.deinit();

			const cwd = std.fs.cwd();
			const abs_nm_path = cwd.realpathAlloc(allocator, node_modules_path) catch return;
			defer allocator.free(abs_nm_path);

			const bin_path = std.fmt.allocPrint(allocator, "{s}/.bin", .{abs_nm_path}) catch return;
			defer allocator.free(bin_path);

			const current_path = env_map.get("PATH") orelse "";
			const new_path = if (builtin.os.tag == .windows)
			std.fmt.allocPrint(allocator, "{s};{s}", .{ bin_path, current_path }) catch return
			else
			std.fmt.allocPrint(allocator, "{s}:{s}", .{ bin_path, current_path }) catch return;
			defer allocator.free(new_path);

			env_map.put("PATH", new_path) catch return;

			var jobs = std.ArrayListUnmanaged(PostinstallJob){};
			defer {
			for (jobs.items) \|*job\| if (job.stderr) \|s\| allocator.free(s);
			jobs.deinit(allocator);
			}

			var key_iter = trusted.keyIterator();
			while (key_iter.next()) \|pkg_name_ptr\| {
			const pkg_name = pkg_name_ptr.*;

			const pkg_json_path = std.fmt.allocPrint(allocator, "{s}/{s}/package.json", .{
			node_modules_path, pkg_name,
			}) catch continue;
			defer allocator.free(pkg_json_path);

			const file = std.fs.cwd().openFile(pkg_json_path, .{}) catch continue;
			defer file.close();

			const content = file.readToEndAlloc(allocator, 1024 * 1024) catch continue;
			defer allocator.free(content);

			var doc = json.JsonDoc.parse(content) catch continue;
			defer doc.deinit();

			const root = doc.root();

			if (root.getObject("scripts")) \|scripts\| {
			const script = scripts.getString("postinstall") orelse
			scripts.getString("install") orelse continue;

			if (std.mem.eql(u8, pkg_name, "esbuild")) {
			debug.log("ignoring esbuild lifecycle scripts", .{});
			continue;
			}

			const pkg_dir = std.fmt.allocPrint(allocator, "{s}/{s}", .{
			node_modules_path, pkg_name,
			}) catch continue;

			const marker_path = std.fmt.allocPrint(allocator, "{s}/.postinstall", .{pkg_dir}) catch continue;
			defer allocator.free(marker_path);
			if (std.fs.cwd().access(marker_path, .{})) \|_\| {
			debug.log("postinstall already done: {s}", .{pkg_name});
			allocator.free(pkg_dir);
			continue;
			} else \|_\| {}

			jobs.append(allocator, .{
			.pkg_name = pkg_name,
			.pkg_dir = pkg_dir,
			.script = allocator.dupe(u8, script) catch continue,
			}) catch continue;
			}
			}

			if (jobs.items.len == 0) return;
			for (jobs.items) \|job\| debug.log("starting postinstall: {s}", .{job.pkg_name});

			for (jobs.items, 0..) \|*job, i\| {
			const msg = std.fmt.allocPrintSentinel(allocator, "{s}", .{job.pkg_name}, 0) catch continue;
			ctx.reportProgress(.postinstall, @intCast(i), @intCast(jobs.items.len), msg);
			debug.log("running postinstall: {s}", .{job.pkg_name});

			const shell_argv: []const []const u8 = if (builtin.os.tag == .windows)
			&[_][]const u8{ "cmd", "/c", job.script }
			else
			&[_][]const u8{ "sh", "-c", job.script };

			var child = std.process.Child.init(shell_argv, allocator);
			child.cwd = job.pkg_dir;
			child.env_map = &env_map;
			child.stderr_behavior = .Pipe;
			child.stdout_behavior = .Pipe;

			child.spawn() catch {
			job.failed = true;
			continue;
			};
			job.child = child;
			}

			var scripts_run: u32 = 0;
			for (jobs.items) \|*job\| {
			if (job.child) \|*child\| {
			var stdout_buf: std.ArrayList(u8) = .empty;
			var stderr_buf: std.ArrayList(u8) = .empty;

			child.collectOutput(allocator, &stdout_buf, &stderr_buf, 1024 * 1024) catch {};

			const term = child.wait() catch {
			stdout_buf.deinit(allocator);
			stderr_buf.deinit(allocator);
			job.failed = true;
			continue;
			};

			if (stdout_buf.items.len > 0) {
			var line_iter = std.mem.splitScalar(u8, stdout_buf.items, '\n');
			while (line_iter.next()) \|line\| {
			if (line.len > 0) debug.log(" {s}: {s}", .{ job.pkg_name, line });
			}
			} stdout_buf.deinit(allocator);

			switch (term) {
			.Exited => \|code\| {
			if (code != 0) {
			job.exit_code = code;
			job.stderr = if (stderr_buf.items.len > 0) stderr_buf.toOwnedSlice(allocator) catch null else null;
			debug.log(" postinstall failed for {s}: exit code {d}", .{ job.pkg_name, code });
			if (job.stderr) \|s\| {
			if (s.len > 0) debug.log(" stderr: {s}", .{s});
			}
			} else {
			stderr_buf.deinit(allocator);
			scripts_run += 1;
			const marker_path = std.fmt.allocPrint(allocator, "{s}/.postinstall", .{job.pkg_dir}) catch continue;
			defer allocator.free(marker_path);
			if (std.fs.cwd().createFile(marker_path, .{})) \|f\| f.close() else \|_\| {}
			}
			},
			.Signal => \|sig\| {
			job.failed = true;
			debug.log(" postinstall killed by signal {d}: {s}", .{ sig, job.pkg_name });
			stderr_buf.deinit(allocator);
			},
			else => {
			job.failed = true;
			stderr_buf.deinit(allocator);
			},
			}
			}
			}

			for (jobs.items) \|job\| {
			allocator.free(job.pkg_dir);
			allocator.free(job.script);
			}

			if (scripts_run > 0) debug.log("ran {d} postinstall scripts", .{scripts_run});
			}

			export fn pkg_add(
			ctx: ?*PkgContext,
			package_json_path: [*:0]const u8,
			package_spec: [*:0]const u8,
			dev: bool,
			) PkgError {
			const c = ctx orelse return .invalid_argument;
			_ = c.arena_state.reset(.retain_capacity);
			const arena_alloc = c.arena_state.allocator();

			const pkg_json_str = std.mem.span(package_json_path);
			const spec_str = std.mem.span(package_spec);

			var pkg_name: []const u8 = spec_str;
			var version_constraint: []const u8 = "latest";

			if (std.mem.indexOf(u8, spec_str, "@")) \|at_idx\| {
			if (at_idx == 0) {
			if (std.mem.indexOfPos(u8, spec_str, 1, "@")) \|second_at\| {
			pkg_name = spec_str[0..second_at];
			version_constraint = spec_str[second_at + 1 ..];
			}
			} else {
			pkg_name = spec_str[0..at_idx];
			version_constraint = spec_str[at_idx + 1 ..];
			}
			}

			const http = c.http orelse return .network_error;
			var res = resolver.Resolver.init(
			arena_alloc,
			c.allocator,
			&c.string_pool,
			http,
			c.cache_db,
			if (c.options.registry_url) \|url\| std.mem.span(url) else "https://registry.npmjs.org",
			&c.metadata_cache,
			); defer res.deinit();

			const resolved_pkg = res.resolve(pkg_name, version_constraint, 0) catch \|err\| {
			setResolveError(c, pkg_name, err);
			return .resolve_error;
			};

			const content = blk: {
			const file = std.fs.cwd().openFile(pkg_json_str, .{ .mode = .read_only }) catch \|err\| {
			if (err == error.FileNotFound) break :blk "{}";
			c.setError("Failed to open package.json");
			return .io_error;
			};
			defer file.close();
			break :blk file.readToEndAlloc(arena_alloc, 10 * 1024 * 1024) catch {
			c.setError("Failed to read package.json");
			return .io_error;
			};
			};

			const parsed = std.json.parseFromSlice(std.json.Value, arena_alloc, content, .{}) catch {
			c.setError("Failed to parse package.json");
			return .invalid_argument;
			}; defer parsed.deinit();

			if (parsed.value != .object) {
			c.setError("Invalid package.json format");
			return .invalid_argument;
			}

			const version_str = resolved_pkg.version.format(arena_alloc) catch {
			return .out_of_memory;
			};

			const version_with_caret = std.fmt.allocPrint(arena_alloc, "^{s}", .{version_str}) catch {
			return .out_of_memory;
			};

			const target_key = if (dev) "devDependencies" else "dependencies";

			var deps = if (parsed.value.object.get(target_key)) \|d\|
			if (d == .object) d.object else std.json.ObjectMap.init(arena_alloc)
			else std.json.ObjectMap.init(arena_alloc);

			deps.put(pkg_name, .{ .string = version_with_caret }) catch {
			return .out_of_memory;
			};

			var writer = json.JsonWriter.init() catch {
			return .out_of_memory;
			}; defer writer.deinit();

			const root_obj = writer.createObject();
			writer.setRoot(root_obj);

			var found_target = false;
			for (parsed.value.object.keys(), parsed.value.object.values()) \|key, value\| {
			if (std.mem.eql(u8, key, target_key)) {
			found_target = true;
			const deps_obj = writer.createObject();
			var dep_iter = deps.iterator();
			while (dep_iter.next()) \|entry\| {
			if (entry.value_ptr.* == .string) {
			writer.objectAdd(deps_obj, entry.key_ptr.*, writer.createString(entry.value_ptr.string));
			}
			} writer.objectAdd(root_obj, key, deps_obj);
			} else {
			const json_val = jsonValueToMut(&writer, value) catch continue;
			writer.objectAdd(root_obj, key, json_val);
			}
			}

			if (!found_target) {
			const deps_obj = writer.createObject();
			writer.objectAdd(deps_obj, pkg_name, writer.createString(version_with_caret));
			writer.objectAdd(root_obj, target_key, deps_obj);
			}

			const pkg_json_z = arena_alloc.dupeZ(u8, pkg_json_str) catch {
			return .out_of_memory;
			};

			writer.writeToFile(pkg_json_z) catch {
			c.setError("Failed to write package.json");
			return .io_error;
			};

			return .ok;
			}

			export fn pkg_add_many(
			ctx: ?*PkgContext,
			package_json_path: [*:0]const u8,
			package_specs: []const [:0]const u8,
			count: u32,
			dev: bool,
			) PkgError {
			const c = ctx orelse return .invalid_argument;
			_ = c.arena_state.reset(.retain_capacity);
			const arena_alloc = c.arena_state.allocator();

			const pkg_json_str = std.mem.span(package_json_path);

			const http = c.http orelse return .network_error;
			var res = resolver.Resolver.init(
			arena_alloc,
			c.allocator,
			&c.string_pool,
			http,
			c.cache_db,
			if (c.options.registry_url) \|url\| std.mem.span(url) else "https://registry.npmjs.org",
			&c.metadata_cache,
			); defer res.deinit();

			const ResolvedEntry = struct {
			name: []const u8,
			version_str: []const u8,
			};

			const resolved = arena_alloc.alloc(ResolvedEntry, count) catch return .out_of_memory;

			for (0..count) \|i\| {
			const spec_str = std.mem.span(package_specs[i]);
			var pkg_name: []const u8 = spec_str;
			var version_constraint: []const u8 = "latest";

			if (std.mem.indexOf(u8, spec_str, "@")) \|at_idx\| {
			if (at_idx == 0) {
			if (std.mem.indexOfPos(u8, spec_str, 1, "@")) \|second_at\| {
			pkg_name = spec_str[0..second_at];
			version_constraint = spec_str[second_at + 1 ..];
			}
			} else {
			pkg_name = spec_str[0..at_idx];
			version_constraint = spec_str[at_idx + 1 ..];
			}
			}

			const resolved_pkg = res.resolve(pkg_name, version_constraint, 0) catch \|err\| {
			setResolveError(c, pkg_name, err);
			return .resolve_error;
			};

			const version_str = resolved_pkg.version.format(arena_alloc) catch return .out_of_memory;
			resolved[i] = .{ .name = pkg_name, .version_str = version_str };
			}

			const content = blk: {
			const file = std.fs.cwd().openFile(pkg_json_str, .{ .mode = .read_only }) catch \|err\| {
			if (err == error.FileNotFound) break :blk "{}";
			c.setError("Failed to open package.json");
			return .io_error;
			};
			defer file.close();
			break :blk file.readToEndAlloc(arena_alloc, 10 * 1024 * 1024) catch {
			c.setError("Failed to read package.json");
			return .io_error;
			};
			};

			const parsed = std.json.parseFromSlice(std.json.Value, arena_alloc, content, .{}) catch {
			c.setError("Failed to parse package.json");
			return .invalid_argument;
			}; defer parsed.deinit();

			if (parsed.value != .object) {
			c.setError("Invalid package.json format");
			return .invalid_argument;
			}

			const target_key = if (dev) "devDependencies" else "dependencies";

			var deps = if (parsed.value.object.get(target_key)) \|d\|
			if (d == .object) d.object else std.json.ObjectMap.init(arena_alloc)
			else std.json.ObjectMap.init(arena_alloc);

			for (resolved) \|entry\| {
			const version_with_caret = std.fmt.allocPrint(arena_alloc, "^{s}", .{entry.version_str}) catch return .out_of_memory;
			deps.put(entry.name, .{ .string = version_with_caret }) catch return .out_of_memory;
			}

			var writer = json.JsonWriter.init() catch return .out_of_memory;
			defer writer.deinit();

			const root_obj = writer.createObject();
			writer.setRoot(root_obj);

			var found_target = false;
			for (parsed.value.object.keys(), parsed.value.object.values()) \|key, value\| {
			if (std.mem.eql(u8, key, target_key)) {
			found_target = true;
			const deps_obj = writer.createObject();
			var dep_iter = deps.iterator();
			while (dep_iter.next()) \|entry\| {
			if (entry.value_ptr.* == .string) {
			writer.objectAdd(deps_obj, entry.key_ptr.*, writer.createString(entry.value_ptr.string));
			}
			} writer.objectAdd(root_obj, key, deps_obj);
			} else {
			const json_val = jsonValueToMut(&writer, value) catch continue;
			writer.objectAdd(root_obj, key, json_val);
			}
			}

			if (!found_target) {
			const deps_obj = writer.createObject();
			for (resolved) \|entry\| {
			const version_with_caret = std.fmt.allocPrint(arena_alloc, "^{s}", .{entry.version_str}) catch return .out_of_memory;
			writer.objectAdd(deps_obj, entry.name, writer.createString(version_with_caret));
			}
			writer.objectAdd(root_obj, target_key, deps_obj);
			}

			const pkg_json_z = arena_alloc.dupeZ(u8, pkg_json_str) catch return .out_of_memory;

			writer.writeToFile(pkg_json_z) catch {
			c.setError("Failed to write package.json");
			return .io_error;
			};

			return .ok;
			}

			fn jsonValueToMut(writer: json.JsonWriter, value: std.json.Value) !json.yyjson.yyjson_mut_val {
			return switch (value) {
			.null => writer.createNull(),
			.bool => \|b\| writer.createBool(b),
			.integer => \|i\| writer.createInt(i),
			.float => \|f\| writer.createReal(f),
			.string => \|s\| writer.createString(s),
			.array => \|arr\| blk: {
			const json_arr = writer.createArray();
			for (arr.items) \|item\| {
			const item_val = try jsonValueToMut(writer, item);
			writer.arrayAppend(json_arr, item_val);
			}
			break :blk json_arr;
			},
			.object => \|obj\| blk: {
			const json_obj = writer.createObject();
			for (obj.keys(), obj.values()) \|k, v\| {
			const v_mut = try jsonValueToMut(writer, v);
			writer.objectAdd(json_obj, k, v_mut);
			}
			break :blk json_obj;
			},
			.number_string => \|s\| writer.createString(s),
			};
			}

			export fn pkg_remove(
			ctx: ?*PkgContext,
			package_json_path: [*:0]const u8,
			package_name: [*:0]const u8,
			) PkgError {
			const c = ctx orelse return .invalid_argument;
			_ = c.arena_state.reset(.retain_capacity);
			const arena_alloc = c.arena_state.allocator();

			const pkg_json_str = std.mem.span(package_json_path);
			const name_str = std.mem.span(package_name);

			const content = std.fs.cwd().readFileAlloc(arena_alloc, pkg_json_str, 10 * 1024 * 1024) catch {
			c.setError("Failed to read package.json");
			return .io_error;
			};

			const parsed = std.json.parseFromSlice(std.json.Value, arena_alloc, content, .{}) catch {
			c.setError("Failed to parse package.json");
			return .invalid_argument;
			};
			defer parsed.deinit();

			if (parsed.value != .object) {
			c.setError("Invalid package.json format");
			return .invalid_argument;
			}

			const dep_keys = [_][]const u8{
			"dependencies",
			"devDependencies",
			"peerDependencies",
			"optionalDependencies"
			};

			const found = found: {
			for (dep_keys) \|dep_key\| {
			const deps = parsed.value.object.get(dep_key) orelse continue;
			if (deps != .object) continue;
			if (deps.object.get(name_str) != null) break :found true;
			}
			break :found false;
			};

			if (!found) {
			c.setErrorFmt("Package {s} not found in dependencies", .{name_str});
			return .not_found;
			}

			var writer = json.JsonWriter.init() catch return .out_of_memory;
			defer writer.deinit();

			const root_obj = writer.createObject();
			writer.setRoot(root_obj);

			for (parsed.value.object.keys(), parsed.value.object.values()) \|key, value\| {
			const is_dep_obj = for (dep_keys) \|dk\| {
			if (std.mem.eql(u8, key, dk)) break true;
			} else false;

			if (!is_dep_obj or value != .object) {
			const val_mut = jsonValueToMut(&writer, value) catch continue;
			writer.objectAdd(root_obj, key, val_mut);
			continue;
			}

			const filtered_obj = writer.createObject();
			for (value.object.keys(), value.object.values()) \|dk, dv\| {
			if (std.mem.eql(u8, dk, name_str)) continue;
			const dv_mut = jsonValueToMut(&writer, dv) catch continue;
			writer.objectAdd(filtered_obj, dk, dv_mut);
			}
			writer.objectAdd(root_obj, key, filtered_obj);
			}

			const pkg_json_z = arena_alloc.dupeZ(u8, pkg_json_str) catch return .out_of_memory;
			writer.writeToFile(pkg_json_z) catch {
			c.setError("Failed to write package.json");
			return .io_error;
			};

			return .ok;
			}

			export fn pkg_error_string(ctx: ?const PkgContext) [:0]const u8 {
			if (ctx) \|c\| if (c.last_error) \|e\| return e.ptr;
			return "Unknown error";
			}

			export fn pkg_cache_sync(ctx: ?*PkgContext) void {
			if (ctx) \|c\| if (c.cache_db) \|db\| db.sync();
			}

			export fn pkg_cache_stats(ctx: ?PkgContext, out: CacheStats) PkgError {
			const c = ctx orelse return .invalid_argument;
			const db = c.cache_db orelse return .cache_error;

			const stats = db.stats() catch return .cache_error;
			out.* = .{
			.total_size = stats.cache_size,
			.db_size = stats.db_size,
			.package_count = @intCast(stats.entries),
			};

			return .ok;
			}

			export fn pkg_cache_prune(ctx: ?*PkgContext, max_age_days: u32) i32 {
			const c = ctx orelse return @intFromEnum(PkgError.invalid_argument);
			const db = c.cache_db orelse return @intFromEnum(PkgError.cache_error);

			const pruned = db.prune(max_age_days) catch return @intFromEnum(PkgError.cache_error);
			return @intCast(pruned);
			}

			export fn pkg_get_bin_path(
			node_modules_path: [*:0]const u8,
			bin_name: [*:0]const u8,
			out_path: [*]u8,
			out_path_len: usize,
			) c_int {
			const nm_path = std.mem.span(node_modules_path);
			const full = std.mem.span(bin_name);

			const start: usize = if (full.len > 0 and full[0] == '@')
			(std.mem.indexOfScalar(u8, full[1..], '/') orelse return -1) + 2
			else 0;
			const name, const constraint_str = if (std.mem.indexOfScalar(u8, full[start..], '@')) \|i\|
			.{ full[0..start + i], full[start + i + 1..] }
			else
			.{ full, @as([]const u8, "") };

			var path_buf: [std.fs.max_path_bytes]u8 = undefined;
			const bin_path = std.fmt.bufPrint(&path_buf, "{s}/.bin/{s}", .{ nm_path, name }) catch return -1;

			std.fs.cwd().access(bin_path, .{}) catch return -1;

			if (constraint_str.len > 0) {
			const constraint = resolver.Constraint.parse(constraint_str) catch return -1;
			if (constraint.kind != .any) {
			var pkg_buf: [std.fs.max_path_bytes]u8 = undefined;
			const pkg_path = std.fmt.bufPrint(&pkg_buf, "{s}/{s}/package.json", .{ nm_path, name }) catch return -1;
			const pkg_path_z = pkg_buf[0..pkg_path.len :0];
			var doc = json.JsonDoc.parseFile(pkg_path_z) catch return -1;
			defer doc.deinit();
			const version_str = doc.root().getString("version") orelse return -1;
			const installed = resolver.Version.parse(version_str) catch return -1;
			if (!constraint.satisfies(installed)) return -1;
			}
			}

			var real_path_buf: [std.fs.max_path_bytes]u8 = undefined;
			const real_path = std.fs.cwd().realpath(bin_path, &real_path_buf) catch return -1;

			if (real_path.len >= out_path_len) return -1;

			@memcpy(out_path[0..real_path.len], real_path);
			out_path[real_path.len] = 0;

			return @intCast(real_path.len);
			}

			export fn pkg_list_bins(
			node_modules_path: [*:0]const u8,
			callback: ?const fn ([:0]const u8, ?*anyopaque) callconv(.c) void,
			user_data: ?*anyopaque,
			) c_int {
			const nm_path = std.mem.span(node_modules_path);

			var path_buf: [std.fs.max_path_bytes]u8 = undefined;
			const bin_dir_path = std.fmt.bufPrint(&path_buf, "{s}/.bin", .{nm_path}) catch return -1;

			var dir = std.fs.cwd().openDir(bin_dir_path, .{ .iterate = true }) catch return -1;
			defer dir.close();

			var count: c_int = 0;
			var iter = dir.iterate();
			while (iter.next() catch null) \|entry\| {
			if (entry.kind == .sym_link or entry.kind == .file) {
			if (callback) \|cb\| {
			var name_buf: [256]u8 = undefined;
			if (entry.name.len < name_buf.len) {
			@memcpy(name_buf[0..entry.name.len], entry.name);
			name_buf[entry.name.len] = 0;
			cb(@ptrCast(&name_buf), user_data);
			}
			}
			count += 1;
			}
			}

			return count;
			}

			export fn pkg_list_package_bins(
			node_modules_path: [*:0]const u8,
			package_name: [*:0]const u8,
			callback: ?const fn ([:0]const u8, ?*anyopaque) callconv(.c) void,
			user_data: ?*anyopaque,
			) c_int {
			const nm_path = std.mem.span(node_modules_path);
			const pkg_name = std.mem.span(package_name);

			var path_buf: [std.fs.max_path_bytes]u8 = undefined;
			const pkg_json_path = std.fmt.bufPrint(&path_buf, "{s}/{s}/package.json", .{ nm_path, pkg_name }) catch return -1;

			const file = std.fs.cwd().openFile(pkg_json_path, .{}) catch return -1;
			defer file.close();

			const content = file.readToEndAlloc(global_allocator, 1024 * 1024) catch return -1;
			defer global_allocator.free(content);

			var doc = json.JsonDoc.parse(content) catch return -1;
			defer doc.deinit();

			const root_val = doc.root();
			var count: c_int = 0;

			if (root_val.getObject("bin")) \|bin_obj\| {
			var iter = bin_obj.objectIterator() orelse return 0;
			while (iter.next()) \|entry\| {
			if (callback) \|cb\| {
			var name_buf: [256]u8 = undefined;
			if (entry.key.len < name_buf.len) {
			@memcpy(name_buf[0..entry.key.len], entry.key);
			name_buf[entry.key.len] = 0;
			cb(@ptrCast(&name_buf), user_data);
			}
			}
			count += 1;
			}
			} else if (root_val.getString("bin")) \|_\| {
			const simple_name = if (std.mem.indexOf(u8, pkg_name, "/")) \|slash\| pkg_name[slash + 1 ..]
			else pkg_name;

			if (callback) \|cb\| {
			var name_buf: [256]u8 = undefined;
			if (simple_name.len < name_buf.len) {
			@memcpy(name_buf[0..simple_name.len], simple_name);
			name_buf[simple_name.len] = 0;
			cb(@ptrCast(&name_buf), user_data);
			}
			}
			count = 1;
			}

			return count;
			}

			export fn pkg_get_script(
			package_json_path: [*:0]const u8,
			script_name: [*:0]const u8,
			out_script: [*]u8,
			out_script_len: usize,
			) c_int {
			const allocator = global_allocator;
			const name = std.mem.span(script_name);

			var doc = json.JsonDoc.parseFile(std.mem.span(package_json_path)) catch return -1;
			defer doc.deinit();
			const root_val = doc.root();

			if (root_val.getObject("scripts")) \|scripts_obj\| {
			if (scripts_obj.getString(std.mem.span(script_name))) \|script\| {
			if (script.len >= out_script_len) return -1;
			@memcpy(out_script[0..script.len], script);
			out_script[script.len] = 0;
			return @intCast(script.len);
			}
			}

			if (std.mem.eql(u8, name, "start")) {
			if (root_val.getString("main")) \|main_file\| {
			const script = std.fmt.allocPrint(allocator, "ant {s}", .{main_file}) catch return -1;
			defer allocator.free(script);
			if (script.len >= out_script_len) return -1;
			@memcpy(out_script[0..script.len], script);
			out_script[script.len] = 0;
			return @intCast(script.len);
			}

			if (std.fs.cwd().access("server.js", .{})) \|_\| {
			const script = "ant server.js";
			if (script.len >= out_script_len) return -1;
			@memcpy(out_script[0..script.len], script);
			out_script[script.len] = 0;
			return @intCast(script.len);
			} else \|_\| {}
			}

			return -1;
			}

			pub const ScriptResult = extern struct {
			exit_code: c_int,
			signal: c_int,
			};

			fn runScriptCommand(
			allocator: std.mem.Allocator,
			script: []const u8,
			extra_args: ?[*:0]const u8,
			env_map: *std.process.EnvMap,
			) !ScriptResult {
			const final_script = if (extra_args) \|args\| blk: {
			const args_str = std.mem.span(args);
			if (args_str.len > 0) {
			break :blk try std.fmt.allocPrint(allocator, "{s} {s}", .{ script, args_str });
			}
			break :blk try allocator.dupe(u8, script);
			} else try allocator.dupe(u8, script);
			defer allocator.free(final_script);

			const script_z = try allocator.dupeZ(u8, final_script);
			defer allocator.free(script_z);

			const shell_argv: []const []const u8 = if (builtin.os.tag == .windows)
			&[_][]const u8{ "cmd", "/c", script_z }
			else &[_][]const u8{ "sh", "-c", script_z };

			var child = std.process.Child.init(shell_argv, allocator);
			child.env_map = env_map;

			try child.spawn();
			const term = try child.wait();

			return switch (term) {
			.Exited => \|code\| .{ .exit_code = code, .signal = 0 },
			.Signal => \|sig\| .{ .exit_code = -1, .signal = @intCast(sig) },
			else => .{ .exit_code = -1, .signal = 0 },
			};
			}

			export fn pkg_run_script(
			package_json_path: [*:0]const u8,
			script_name: [*:0]const u8,
			node_modules_path: [*:0]const u8,
			extra_args: ?[*:0]const u8,
			result: ?*ScriptResult,
			) PkgError {
			const allocator = global_allocator;
			const name = std.mem.span(script_name);

			var doc = json.JsonDoc.parseFile(std.mem.span(package_json_path)) catch return .io_error;
			defer doc.deinit(); const root_val = doc.root();

			var script_buf: [8192]u8 = undefined;
			const script_len = pkg_get_script(package_json_path, script_name, &script_buf, script_buf.len);

			if (script_len < 0) return .not_found;
			const script = script_buf[0..@intCast(script_len)];

			var pre_script: ?[]const u8 = null;
			var post_script: ?[]const u8 = null;

			if (root_val.getObject("scripts")) \|scripts_obj\| {
			var pre_key_buf: [256]u8 = undefined;
			var post_key_buf: [256]u8 = undefined;

			const pre_key = std.fmt.bufPrintZ(&pre_key_buf, "pre{s}", .{name}) catch null;
			const post_key = std.fmt.bufPrintZ(&post_key_buf, "post{s}", .{name}) catch null;

			if (pre_key) \|pk\| pre_script = scripts_obj.getString(pk);
			if (post_key) \|pk\| post_script = scripts_obj.getString(pk);
			}

			var env_map = std.process.getEnvMap(allocator) catch return .out_of_memory;
			defer env_map.deinit(); const nm_path = std.mem.span(node_modules_path);

			const cwd = std.fs.cwd();
			const abs_nm_path = cwd.realpathAlloc(allocator, nm_path) catch nm_path;
			defer if (abs_nm_path.ptr != nm_path.ptr) allocator.free(abs_nm_path);

			const bin_path = std.fmt.allocPrint(allocator, "{s}/.bin", .{abs_nm_path}) catch return .out_of_memory;
			defer allocator.free(bin_path);

			const current_path = env_map.get("PATH") orelse "";
			const new_path = if (builtin.os.tag == .windows)
			std.fmt.allocPrint(allocator, "{s};{s}", .{ bin_path, current_path }) catch return .out_of_memory
			else
			std.fmt.allocPrint(allocator, "{s}:{s}", .{ bin_path, current_path }) catch return .out_of_memory;
			defer allocator.free(new_path);

			env_map.put("PATH", new_path) catch return .out_of_memory;
			env_map.put("npm_lifecycle_event", name) catch {};

			if (root_val.getObject("config")) \|config_obj\| {
			if (config_obj.objectIterator()) \|*config_iter_ptr\| {
			var config_iter = config_iter_ptr.*;
			while (config_iter.next()) \|entry\| {
			if (entry.value.asString()) \|value\| {
			const env_key = std.fmt.allocPrint(allocator, "npm_package_config_{s}", .{entry.key}) catch continue;
			defer allocator.free(env_key);
			env_map.put(env_key, value) catch {};
			}
			}
			}
			}

			if (root_val.getString("name")) \|pkg_name\| env_map.put("npm_package_name", pkg_name) catch {};
			if (root_val.getString("version")) \|pkg_version\| env_map.put("npm_package_version", pkg_version) catch {};

			if (pre_script) \|pre\| {
			const pre_event = std.fmt.allocPrint(allocator, "pre{s}", .{name}) catch name;
			defer if (pre_event.ptr != name.ptr) allocator.free(pre_event);
			env_map.put("npm_lifecycle_event", pre_event) catch {};
			const pre_result = runScriptCommand(allocator, pre, null, &env_map) catch return .io_error;
			if (pre_result.exit_code != 0) {
			if (result) \|r\| r.* = pre_result;
			return .ok;
			}
			}

			env_map.put("npm_lifecycle_event", name) catch {};
			const main_result = runScriptCommand(allocator, script, extra_args, &env_map) catch return .io_error;

			if (main_result.exit_code != 0) {
			if (result) \|r\| r.* = main_result;
			return .ok;
			}

			if (post_script) \|post\| {
			const post_event = std.fmt.allocPrint(allocator, "post{s}", .{name}) catch name;
			defer if (post_event.ptr != name.ptr) allocator.free(post_event);
			env_map.put("npm_lifecycle_event", post_event) catch {};
			const post_result = runScriptCommand(allocator, post, null, &env_map) catch return .io_error;
			if (result) \|r\| r.* = post_result;
			return .ok;
			}

			if (result) \|r\| r.* = main_result;
			return .ok;
			}

			pub const DepType = packed struct(u8) {
			peer: bool = false,
			dev: bool = false,
			optional: bool = false,
			direct: bool = false,
			_reserved: u4 = 0,
			};

			pub const DepCallback = ?*const fn (
			name: [*:0]const u8,
			version: [*:0]const u8,
			constraint: [*:0]const u8,
			dep_type: DepType,
			user_data: ?*anyopaque,
			) callconv(.c) void;

			pub const WhyInfo = extern struct {
			target_version: [64]u8,
			found: bool,
			is_peer: bool,
			is_dev: bool,
			is_direct: bool,
			};

			export fn pkg_why_info(
			lockfile_path: [*:0]const u8,
			package_name: [*:0]const u8,
			out: *WhyInfo,
			) c_int {
			const lf = lockfile.Lockfile.open(std.mem.span(lockfile_path)) catch return -1;
			defer @constCast(&lf).close();

			const target_name = std.mem.span(package_name);
			out.found = false;
			out.is_peer = false;
			out.is_dev = false;
			out.is_direct = false;
			@memset(&out.target_version, 0);

			for (lf.packages) \|*pkg\| {
			const pkg_name = pkg.name.slice(lf.string_table);
			if (std.mem.eql(u8, pkg_name, target_name)) {
			const ver_str = pkg.versionString(global_allocator, lf.string_table) catch return -1;
			defer global_allocator.free(ver_str);
			if (ver_str.len < out.target_version.len) {
			@memcpy(out.target_version[0..ver_str.len], ver_str);
			out.target_version[ver_str.len] = 0;
			}
			out.found = true;
			out.is_dev = pkg.flags.dev;
			out.is_direct = pkg.flags.direct;
			}

			const deps = lf.getPackageDeps(pkg);
			for (deps) \|dep\| {
			const dep_pkg = &lf.packages[dep.package_index];
			const dep_name = dep_pkg.name.slice(lf.string_table);
			if (std.mem.eql(u8, dep_name, target_name) and dep.flags.peer) {
			out.is_peer = true;
			}
			}
			}
			return 0;
			}

			export fn pkg_why(
			lockfile_path: [*:0]const u8,
			package_name: [*:0]const u8,
			callback: DepCallback,
			user_data: ?*anyopaque,
			) c_int {
			const lf = lockfile.Lockfile.open(std.mem.span(lockfile_path)) catch return -1;
			defer @constCast(&lf).close();

			const target_name = std.mem.span(package_name);
			var count: c_int = 0;

			var name_buf: [512]u8 = undefined;
			var ver_buf: [64]u8 = undefined;
			var constraint_buf: [128]u8 = undefined;

			for (lf.packages) \|*pkg\| {
			const deps = lf.getPackageDeps(pkg);
			for (deps) \|dep\| {
			const dep_pkg = &lf.packages[dep.package_index];
			const dep_name = dep_pkg.name.slice(lf.string_table);

			if (std.mem.eql(u8, dep_name, target_name)) {
			const pkg_name = pkg.name.slice(lf.string_table);
			const constraint = dep.constraint.slice(lf.string_table);

			if (callback) \|cb\| {
			if (pkg_name.len < name_buf.len) {
			@memcpy(name_buf[0..pkg_name.len], pkg_name);
			name_buf[pkg_name.len] = 0;

			const ver_str = pkg.versionString(global_allocator, lf.string_table) catch continue;
			defer global_allocator.free(ver_str);
			if (ver_str.len < ver_buf.len) {
			@memcpy(ver_buf[0..ver_str.len], ver_str);
			ver_buf[ver_str.len] = 0;

			if (constraint.len < constraint_buf.len) {
			@memcpy(constraint_buf[0..constraint.len], constraint);
			constraint_buf[constraint.len] = 0;

			const dep_type = DepType{
			.peer = dep.flags.peer,
			.dev = dep.flags.dev or pkg.flags.dev,
			.optional = dep.flags.optional,
			.direct = pkg.flags.direct,
			};
			cb(@ptrCast(&name_buf), @ptrCast(&ver_buf), @ptrCast(&constraint_buf), dep_type, user_data);
			}
			}
			}
			}
			count += 1;
			}
			}
			}

			for (lf.packages) \|*pkg\| {
			const pkg_name = pkg.name.slice(lf.string_table);
			if (std.mem.eql(u8, pkg_name, target_name) and pkg.flags.direct) {
			if (callback) \|cb\| {
			const direct_str = "package.json";
			var direct_buf: [16]u8 = undefined;
			@memcpy(direct_buf[0..direct_str.len], direct_str);
			direct_buf[direct_str.len] = 0;

			var empty_buf: [1]u8 = .{0};
			var dep_buf: [16]u8 = undefined;
			const constraint_str = "dependencies";
			@memcpy(dep_buf[0..constraint_str.len], constraint_str);
			dep_buf[constraint_str.len] = 0;

			const dep_type = DepType{
			.peer = false,
			.dev = pkg.flags.dev,
			.optional = false,
			.direct = true,
			};
			cb(@ptrCast(&direct_buf), @ptrCast(&empty_buf), @ptrCast(&dep_buf), dep_type, user_data);
			}
			count += 1;
			}
			}

			return count;
			}

			export fn pkg_list_scripts(
			package_json_path: [*:0]const u8,
			callback: ?const fn ([:0]const u8, [:0]const u8, ?anyopaque) callconv(.c) void,
			user_data: ?*anyopaque,
			) c_int {
			var doc = json.JsonDoc.parseFile(std.mem.span(package_json_path)) catch return -1;
			defer doc.deinit();

			const root_val = doc.root();
			const scripts_obj = root_val.getObject("scripts") orelse return 0;

			var iter = scripts_obj.objectIterator() orelse return 0;
			defer iter.deinit();

			var count: c_int = 0;
			while (iter.next()) \|entry\| {
			if (callback) \|cb\| {
			var name_buf: [256]u8 = undefined;
			var cmd_buf: [4096]u8 = undefined;

			if (entry.key.len < name_buf.len) {
			@memcpy(name_buf[0..entry.key.len], entry.key);
			name_buf[entry.key.len] = 0;

			if (entry.value.asString()) \|cmd\| {
			if (cmd.len < cmd_buf.len) {
			@memcpy(cmd_buf[0..cmd.len], cmd);
			cmd_buf[cmd.len] = 0;
			cb(@ptrCast(&name_buf), @ptrCast(&cmd_buf), user_data);
			}
			}
			}
			}
			count += 1;
			}

			return count;
			}

			export fn pkg_info(
			ctx: ?*PkgContext,
			package_spec: [*:0]const u8,
			out: *PkgInfo,
			) PkgError {
			const c = ctx orelse return .invalid_argument;
			c.clearInfo();
			_ = c.arena_state.reset(.retain_capacity);
			const arena = c.arena_state.allocator();

			const http = c.http orelse return .network_error;
			const spec = std.mem.span(package_spec);

			var name: []const u8 = spec;
			var requested_version: ?[]const u8 = null;
			if (std.mem.lastIndexOf(u8, spec, "@")) \|at_idx\| {
			if (at_idx > 0) {
			name = spec[0..at_idx];
			requested_version = spec[at_idx + 1..];
			}
			}

			const data = http.fetchMetadataFull(name, true, c.allocator) catch \|err\| {
			c.setErrorFmt("Failed to fetch package info: {}", .{err});
			return .network_error;
			}; defer c.allocator.free(data);

			var doc = json.JsonDoc.parse(data) catch {
			c.setError("Failed to parse package metadata");
			return .resolve_error;
			};

			defer doc.deinit();
			const root = doc.root();

			const versions_obj = root.getObject("versions") orelse {
			c.setError("No versions found");
			return .not_found;
			};

			var versions_iter = versions_obj.objectIterator() orelse return .resolve_error;
			defer versions_iter.deinit();
			var version_count: u32 = 0;
			while (versions_iter.next()) \|_\| version_count += 1;

			var version_str: []const u8 = "";
			if (requested_version) \|rv\| {
			version_str = rv;
			} else if (root.getObject("dist-tags")) \|tags\| {
			version_str = tags.getString("latest") orelse "";
			}

			const version_z = arena.dupeZ(u8, version_str) catch return .out_of_memory;

			const version_obj = versions_obj.getObject(version_z) orelse {
			c.setErrorFmt("Version {s} not found", .{version_str});
			return .not_found;
			};

			var dep_count: u32 = 0;
			if (version_obj.getObject("dependencies")) \|deps\| {
			var deps_iter = deps.objectIterator() orelse return .resolve_error;
			defer deps_iter.deinit();
			while (deps_iter.next()) \|entry\| {
			dep_count += 1;
			if (entry.value.asString()) \|ver\| {
			c.info_dependencies.append(c.allocator, .{
			.name = c.storeInfoString(entry.key) catch continue,
			.version = c.storeInfoString(ver) catch continue,
			}) catch continue;
			}
			}
			}

			const dist = version_obj.getObject("dist");
			const unpacked_size: u64 = if (dist) \|d\| @as(u64, @intCast(d.getInt("unpackedSize") orelse 0)) else 0;

			var keywords_buf = std.ArrayListUnmanaged(u8){};
			defer keywords_buf.deinit(c.allocator);
			if (version_obj.getArray("keywords")) \|kw_arr\| {
			var kw_iter = kw_arr.arrayIterator() orelse return .resolve_error;
			defer kw_iter.deinit();
			var first = true;
			while (kw_iter.next()) \|kw_val\| {
			if (kw_val.asString()) \|kw\| {
			if (!first) keywords_buf.appendSlice(c.allocator, ", ") catch {};
			keywords_buf.appendSlice(c.allocator, kw) catch {};
			first = false;
			}
			}
			}

			out.* = .{
			.name = c.storeInfoString(root.getString("name") orelse name) catch return .out_of_memory,
			.version = c.storeInfoString(version_str) catch return .out_of_memory,
			.description = c.storeInfoString(version_obj.getString("description") orelse "") catch return .out_of_memory,
			.license = c.storeInfoString(version_obj.getString("license") orelse "") catch return .out_of_memory,
			.homepage = c.storeInfoString(version_obj.getString("homepage") orelse "") catch return .out_of_memory,
			.tarball = c.storeInfoString(if (dist) \|d\| d.getString("tarball") orelse "" else "") catch return .out_of_memory,
			.shasum = c.storeInfoString(if (dist) \|d\| d.getString("shasum") orelse "" else "") catch return .out_of_memory,
			.integrity = c.storeInfoString(if (dist) \|d\| d.getString("integrity") orelse "" else "") catch return .out_of_memory,
			.keywords = c.storeInfoString(keywords_buf.items) catch return .out_of_memory,
			.published = c.storeInfoString(if (root.getObject("time")) \|t\| t.getString(version_z) orelse "" else "") catch return .out_of_memory,
			.dep_count = dep_count,
			.version_count = version_count,
			.unpacked_size = unpacked_size,
			};

			if (root.getObject("dist-tags")) \|tags\| {
			var tags_iter = tags.objectIterator() orelse return .ok;
			defer tags_iter.deinit();
			while (tags_iter.next()) \|entry\| {
			if (entry.value.asString()) \|ver\| {
			c.info_dist_tags.append(c.allocator, .{
			.tag = c.storeInfoString(entry.key) catch continue,
			.version = c.storeInfoString(ver) catch continue,
			}) catch continue;
			}
			}
			}

			if (root.getArray("maintainers")) \|maint_arr\| {
			var maint_iter = maint_arr.arrayIterator() orelse return .ok;
			defer maint_iter.deinit();
			while (maint_iter.next()) \|maint_val\| {
			const maint_name = maint_val.getString("name") orelse continue;
			const maint_email = maint_val.getString("email") orelse "";
			c.info_maintainers.append(c.allocator, .{
			.name = c.storeInfoString(maint_name) catch continue,
			.email = c.storeInfoString(maint_email) catch continue,
			}) catch continue;
			}
			}

			return .ok;
			}

			export fn pkg_info_dist_tag_count(ctx: ?*const PkgContext) u32 {
			const c = ctx orelse return 0;
			return @intCast(c.info_dist_tags.items.len);
			}

			export fn pkg_info_get_dist_tag(ctx: ?const PkgContext, index: u32, out: DistTag) PkgError {
			const c = ctx orelse return .invalid_argument;
			if (index >= c.info_dist_tags.items.len) return .invalid_argument;
			out.* = c.info_dist_tags.items[index];
			return .ok;
			}

			export fn pkg_info_maintainer_count(ctx: ?*const PkgContext) u32 {
			const c = ctx orelse return 0;
			return @intCast(c.info_maintainers.items.len);
			}

			export fn pkg_info_get_maintainer(ctx: ?const PkgContext, index: u32, out: Maintainer) PkgError {
			const c = ctx orelse return .invalid_argument;
			if (index >= c.info_maintainers.items.len) return .invalid_argument;
			out.* = c.info_maintainers.items[index];
			return .ok;
			}

			export fn pkg_info_dependency_count(ctx: ?*const PkgContext) u32 {
			const c = ctx orelse return 0;
			return @intCast(c.info_dependencies.items.len);
			}

			export fn pkg_info_get_dependency(ctx: ?const PkgContext, index: u32, out: Dependency) PkgError {
			const c = ctx orelse return .invalid_argument;
			if (index >= c.info_dependencies.items.len) return .invalid_argument;
			out.* = c.info_dependencies.items[index];
			return .ok;
			}

			const BinSelection = struct {
			err: PkgError,
			name: []const u8 = "",
			};

			fn packageSimpleName(pkg_name: []const u8) []const u8 {
			if (std.mem.lastIndexOfScalar(u8, pkg_name, '/')) \|slash\| {
			return pkg_name[slash + 1 ..];
			}
			return pkg_name;
			}

			fn normalizedBinTarget(path: []const u8) []const u8 {
			if (std.mem.startsWith(u8, path, "./")) return path[2..];
			return path;
			}

			fn appendBinName(list: *std.ArrayList(u8), allocator: std.mem.Allocator, name: []const u8) !void {
			if (list.items.len > 0) try list.appendSlice(allocator, ", ");
			try list.appendSlice(allocator, name);
			}

			fn selectPackageBinName(
			c: *PkgContext,
			allocator: std.mem.Allocator,
			node_modules_path: []const u8,
			pkg_name: []const u8,
			) BinSelection {
			const simple_name = packageSimpleName(pkg_name);

			const pkg_json_path = std.fmt.allocPrint(allocator, "{s}/{s}/package.json", .{
			node_modules_path,
			pkg_name,
			}) catch return .{ .err = .out_of_memory };

			const file = std.fs.cwd().openFile(pkg_json_path, .{}) catch {
			c.setErrorFmt("Package '{s}' was installed, but its package.json could not be opened", .{pkg_name});
			return .{ .err = .io_error };
			};
			defer file.close();

			const content = file.readToEndAlloc(allocator, 1024 * 1024) catch {
			c.setErrorFmt("Package '{s}' was installed, but its package.json could not be read", .{pkg_name});
			return .{ .err = .io_error };
			};

			var doc = json.JsonDoc.parse(content) catch {
			c.setErrorFmt("Package '{s}' was installed, but its package.json could not be parsed", .{pkg_name});
			return .{ .err = .io_error };
			};
			defer doc.deinit();

			const root_val = doc.root();

			if (root_val.getString("bin")) \|_\| {
			const selected = allocator.dupe(u8, simple_name) catch return .{ .err = .out_of_memory };
			return .{ .err = .ok, .name = selected };
			}

			const bin_obj = root_val.getObject("bin") orelse {
			c.setErrorFmt("Package '{s}' does not declare any binaries", .{pkg_name});
			return .{ .err = .not_found };
			};

			var iter = bin_obj.objectIterator() orelse {
			c.setErrorFmt("Package '{s}' does not declare any usable binaries", .{pkg_name});
			return .{ .err = .not_found };
			};

			var valid_count: usize = 0;
			var first_name: []const u8 = "";
			var first_target: []const u8 = "";
			var package_named_bin: ?[]const u8 = null;
			var all_targets_same = true;
			var names: std.ArrayList(u8) = .empty;

			while (iter.next()) \|entry\| {
			const target = entry.value.asString() orelse continue;

			if (valid_count == 0) {
			first_name = entry.key;
			first_target = normalizedBinTarget(target);
			} else if (!std.mem.eql(u8, normalizedBinTarget(target), first_target)) {
			all_targets_same = false;
			}

			appendBinName(&names, allocator, entry.key) catch return .{ .err = .out_of_memory };
			valid_count += 1;

			if (std.mem.eql(u8, entry.key, simple_name)) {
			package_named_bin = entry.key;
			}
			}

			const selected = package_named_bin orelse if (valid_count == 1 or all_targets_same) first_name else "";
			if (selected.len > 0) {
			const selected_copy = allocator.dupe(u8, selected) catch return .{ .err = .out_of_memory };
			return .{ .err = .ok, .name = selected_copy };
			}

			if (valid_count == 0) {
			c.setErrorFmt("Package '{s}' does not declare any usable binaries", .{pkg_name});
			} else {
			c.setErrorFmt("Package '{s}' exposes multiple binaries ({s}) and no default could be inferred", .{
			pkg_name,
			names.items,
			});
			}

			return .{ .err = .not_found };
			}

			export fn pkg_exec_temp(
			ctx: ?*PkgContext,
			package_spec: [*:0]const u8,
			out_bin_path: [*]u8,
			out_bin_path_len: usize,
			) PkgError {
			const c = ctx orelse return .invalid_argument;
			_ = c.arena_state.reset(.retain_capacity);
			const arena_alloc = c.arena_state.allocator();

			const spec_str = std.mem.span(package_spec);

			var pkg_name: []const u8 = spec_str;
			var bin_name: []const u8 = spec_str;
			var version_constraint: []const u8 = "latest";

			if (std.mem.indexOf(u8, spec_str, "@")) \|at_idx\| {
			if (at_idx == 0) {
			if (std.mem.indexOfPos(u8, spec_str, 1, "@")) \|second_at\| {
			pkg_name = spec_str[0..second_at];
			version_constraint = spec_str[second_at + 1 ..];
			}
			} else {
			pkg_name = spec_str[0..at_idx];
			version_constraint = spec_str[at_idx + 1 ..];
			}
			}

			if (std.mem.lastIndexOfScalar(u8, pkg_name, '/')) \|slash\| {
			bin_name = pkg_name[slash + 1 ..];
			} else {
			bin_name = pkg_name;
			}

			const exec_base = std.fmt.allocPrint(arena_alloc, "{s}/exec", .{c.cache_dir}) catch return .out_of_memory;
			const temp_nm_path = std.fmt.allocPrint(arena_alloc, "{s}/{s}", .{exec_base, pkg_name}) catch return .out_of_memory;
			const temp_pkg_json = std.fmt.allocPrint(arena_alloc, "{s}/package.json", .{temp_nm_path}) catch return .out_of_memory;
			const temp_nm_dir = std.fmt.allocPrint(arena_alloc, "{s}/node_modules", .{temp_nm_path}) catch return .out_of_memory;
			const temp_lockfile = std.fmt.allocPrint(arena_alloc, "{s}/ant.lockb", .{temp_nm_path}) catch return .out_of_memory;

			if (std.fs.cwd().openDir(exec_base, .{ .iterate = true })) \|dir\| {
			var d = dir;
			defer d.close();

			const stat = d.statFile(pkg_name) catch null;
			if (stat) \|s\| {
			const now: i128 = std.time.nanoTimestamp();
			const mtime: i128 = s.mtime;
			const age_ns = now - mtime;
			const hours_24_ns: i128 = 24 * 60 * 60 * 1_000_000_000;

			if (age_ns > hours_24_ns) {
			debug.log("exec: cleaning stale cache for {s} (age: {d}h)", .{
			pkg_name, @divFloor(age_ns, 60 * 60 * 1_000_000_000),
			});
			d.deleteTree(pkg_name) catch {};
			}
			}
			} else \|_\| {}

			std.fs.cwd().makePath(temp_nm_path) catch {};

			const pkg_json_content = std.fmt.allocPrint(arena_alloc,
			\\{{"dependencies":{{"{s}":"{s}"}}}}
			, .{pkg_name, version_constraint}) catch return .out_of_memory;

			const pkg_json_file = std.fs.cwd().createFile(temp_pkg_json, .{}) catch {
			c.setError("Failed to create temp package.json");
			return .io_error;
			};
			pkg_json_file.writeAll(pkg_json_content) catch {
			pkg_json_file.close();
			c.setError("Failed to write temp package.json");
			return .io_error;
			};
			pkg_json_file.close();

			const http = c.http orelse return .network_error;
			const db = c.cache_db orelse return .cache_error;

			var interleaved = InterleavedContext.init(c.allocator, arena_alloc, db, http, c);
			defer interleaved.deinit();

			var res = resolver.Resolver.init(
			arena_alloc,
			c.allocator,
			&c.string_pool,
			http,
			db,
			if (c.options.registry_url) \|url\| std.mem.span(url) else "https://registry.npmjs.org",
			&c.metadata_cache,
			); defer res.deinit();

			res.setOnPackageResolved(InterleavedContext.onPackageResolved, &interleaved);
			res.resolveFromPackageJson(temp_pkg_json) catch \|err\| {
			setResolveError(c, pkg_name, err);
			return .resolve_error;
			};

			debug.log("exec: resolved {d} packages, queued {d} tarballs", .{
			interleaved.callbacks_received, interleaved.tarballs_queued,
			});

			http.run() catch {};

			var pkg_linker = linker.Linker.init(c.allocator);
			defer pkg_linker.deinit();

			pkg_linker.setNodeModulesPath(temp_nm_dir) catch \|err\| {
			c.setErrorFmt("Failed to set up exec directory: {}", .{err});
			return .io_error;
			};

			for (interleaved.extract_contexts.items) \|ectx\| {
			defer ectx.ext.deinit();
			if (ectx.has_error) continue;

			const stats = ectx.ext.stats();
			db.insert(&.{
			.integrity = ectx.integrity,
			.path = ectx.cache_path,
			.unpacked_size = stats.bytes,
			.file_count = stats.files,
			.cached_at = std.time.timestamp(),
			}, ectx.pkg_name, ectx.version_str) catch continue;

			pkg_linker.linkPackage(.{
			.cache_path = ectx.cache_path,
			.node_modules_path = temp_nm_dir,
			.name = ectx.pkg_name,
			.parent_path = ectx.parent_path,
			.file_count = stats.files,
			.has_bin = ectx.has_bin,
			}) catch continue;
			}

			var resolved_iter = res.resolved.valueIterator();
			while (resolved_iter.next()) \|pkg_ptr\| {
			const pkg = pkg_ptr.*;
			if (db.lookup(&pkg.integrity)) \|cache_entry\| {
			var entry = cache_entry;
			defer entry.deinit();
			const pkg_cache_path = arena_alloc.dupe(u8, entry.path) catch continue;
			pkg_linker.linkPackage(.{
			.cache_path = pkg_cache_path,
			.node_modules_path = temp_nm_dir,
			.name = pkg.name.slice(),
			.parent_path = pkg.parent_path,
			.file_count = entry.file_count,
			.has_bin = pkg.has_bin,
			}) catch continue;
			}
			}

			res.writeLockfile(temp_lockfile) catch {};

			var trusted = std.StringHashMap(void).init(arena_alloc);
			var resolved_iter2 = res.resolved.valueIterator();
			while (resolved_iter2.next()) \|pkg_ptr\| {
			trusted.put(pkg_ptr.*.name.slice(), {}) catch continue;
			}
			runTrustedPostinstall(c, &trusted, temp_nm_dir, arena_alloc);

			const selected_bin = selectPackageBinName(c, arena_alloc, temp_nm_dir, pkg_name);
			if (selected_bin.err != .ok) return selected_bin.err;
			bin_name = selected_bin.name;

			var bin_path_buf: [std.fs.max_path_bytes]u8 = undefined;
			const bin_link_path = std.fmt.bufPrint(&bin_path_buf, "{s}/.bin/{s}", .{ temp_nm_dir, bin_name }) catch return .io_error;

			debug.log("exec: looking for bin at {s}", .{bin_link_path});

			std.fs.cwd().access(bin_link_path, .{}) catch {
			c.setErrorFmt("Binary '{s}' not found in package", .{bin_name});
			return .not_found;
			};

			var real_path_buf: [std.fs.max_path_bytes]u8 = undefined;
			const real_path = std.fs.cwd().realpath(bin_link_path, &real_path_buf) catch return .io_error;

			if (real_path.len >= out_bin_path_len) return .io_error;

			@memcpy(out_bin_path[0..real_path.len], real_path);
			out_bin_path[real_path.len] = 0;

			return .ok;
			}

			fn getGlobalDir(allocator: std.mem.Allocator) ![]const u8 {
			if (builtin.os.tag != .windows) {
			if (try getLegacyAntDirIfExists(allocator)) \|dir\| {
			defer allocator.free(dir);
			return std.fmt.allocPrint(allocator, "{s}/pkg/global", .{dir});
			}
			if (getAbsoluteEnv("XDG_DATA_HOME")) \|base\| {
			return std.fmt.allocPrint(allocator, "{s}/ant/pkg/global", .{base});
			}
			const home = try getHomeDir(allocator);
			defer allocator.free(home);
			return std.fmt.allocPrint(allocator, "{s}/.local/share/ant/pkg/global", .{home});
			}

			const home = try getHomeDir(allocator);
			defer allocator.free(home);
			return std.fmt.allocPrint(allocator, "{s}/.ant/pkg/global", .{home});
			}

			fn getGlobalBinDir(allocator: std.mem.Allocator) ![]const u8 {
			const home = try getHomeDir(allocator);
			defer allocator.free(home);
			if (builtin.os.tag != .windows) {
			if (try getLegacyAntDirIfExists(allocator)) \|dir\| {
			defer allocator.free(dir);
			return std.fmt.allocPrint(allocator, "{s}/bin", .{dir});
			}
			return std.fmt.allocPrint(allocator, "{s}/.local/bin", .{home});
			}
			return std.fmt.allocPrint(allocator, "{s}/.ant/bin", .{home});
			}

			fn ensureGlobalPackageJson(allocator: std.mem.Allocator, global_dir: []const u8) !void {
			const pkg_json_path = try std.fmt.allocPrint(allocator, "{s}/package.json", .{global_dir});
			defer allocator.free(pkg_json_path);

			std.fs.cwd().access(pkg_json_path, .{}) catch {
			std.fs.cwd().makePath(global_dir) catch {};
			const file = try std.fs.cwd().createFile(pkg_json_path, .{});
			defer file.close();
			try file.writeAll("{\"dependencies\":{}}\n");
			};
			}

			fn linkGlobalBins(allocator: std.mem.Allocator, nm_path: []const u8, pkg_name: []const u8) void {
			const bin_dir = getGlobalBinDir(allocator) catch return;
			defer allocator.free(bin_dir);

			std.fs.cwd().makePath(bin_dir) catch return;

			const pkg_bin_dir = std.fmt.allocPrint(allocator, "{s}/{s}", .{nm_path, pkg_name}) catch return;
			defer allocator.free(pkg_bin_dir);

			const pkg_json_path = std.fmt.allocPrint(allocator, "{s}/package.json", .{pkg_bin_dir}) catch return;
			defer allocator.free(pkg_json_path);

			const content = std.fs.cwd().readFileAlloc(allocator, pkg_json_path, 1024 * 1024) catch return;
			defer allocator.free(content);

			const parsed = std.json.parseFromSlice(std.json.Value, allocator, content, .{}) catch return;
			defer parsed.deinit();

			const bin_val = parsed.value.object.get("bin") orelse return;

			switch (bin_val) {
			.string => \|s\| {
			const base_name = if (std.mem.lastIndexOfScalar(u8, pkg_name, '/')) \|idx\|
			pkg_name[idx + 1..] else pkg_name;
			linkSingleBin(allocator, bin_dir, nm_path, pkg_name, base_name, s);
			},
			.object => \|obj\| {
			for (obj.keys(), obj.values()) \|bin_name, path_val\| {
			if (path_val == .string) linkSingleBin(allocator, bin_dir, nm_path, pkg_name, bin_name, path_val.string);
			}
			},
			else => {},
			}
			}

			fn linkSingleBin(allocator: std.mem.Allocator, bin_dir: []const u8, nm_path: []const u8, pkg_name: []const u8, bin_name: []const u8, bin_rel_path: []const u8) void {
			const target = std.fmt.allocPrint(allocator, "{s}/{s}/{s}", .{nm_path, pkg_name, bin_rel_path}) catch return;
			defer allocator.free(target);

			const link_path = std.fmt.allocPrint(allocator, "{s}/{s}", .{bin_dir, bin_name}) catch return;
			defer allocator.free(link_path);

			std.fs.cwd().deleteFile(link_path) catch {};
			linker.createSymlinkAbsolute(target, link_path);

			debug.log("linked global bin: {s} -> {s}", .{link_path, target});
			}

			fn unlinkGlobalBins(allocator: std.mem.Allocator, pkg_name: []const u8) void {
			const bin_dir = getGlobalBinDir(allocator) catch return;
			defer allocator.free(bin_dir);

			var dir = std.fs.cwd().openDir(bin_dir, .{ .iterate = true }) catch return;
			defer dir.close();

			var iter = dir.iterate();
			while (iter.next() catch null) \|entry\| {
			if (entry.kind != .sym_link) continue;

			var target_buf: [std.fs.max_path_bytes]u8 = undefined;
			const target = dir.readLink(entry.name, &target_buf) catch continue;

			const pattern = std.fmt.allocPrint(allocator, "/{s}/", .{pkg_name}) catch continue;
			defer allocator.free(pattern);
			const pattern_end = std.fmt.allocPrint(allocator, "/{s}", .{pkg_name}) catch continue;
			defer allocator.free(pattern_end);

			if (std.mem.indexOf(u8, target, pattern) != null or std.mem.endsWith(u8, target, pattern_end)) {
			dir.deleteFile(entry.name) catch continue;
			debug.log("unlinked global bin: {s}", .{entry.name});
			}
			}
			}

			export fn pkg_add_global(
			ctx: ?*PkgContext,
			package_spec: [*:0]const u8,
			) PkgError {
			const specs = [_][*:0]const u8{package_spec};
			return pkg_add_global_many(ctx, &specs, 1);
			}

			export fn pkg_add_global_many(
			ctx: ?*PkgContext,
			package_specs: []const [:0]const u8,
			count: u32,
			) PkgError {
			const c = ctx orelse return .invalid_argument;
			const allocator = c.allocator;

			const global_dir = getGlobalDir(allocator) catch {
			c.setError("HOME not set");
			return .invalid_argument;
			};
			defer allocator.free(global_dir);

			ensureGlobalPackageJson(allocator, global_dir) catch {
			c.setError("Failed to create global package.json");
			return .io_error;
			};

			const pkg_json_path = std.fmt.allocPrintSentinel(allocator, "{s}/package.json", .{global_dir}, 0) catch return .out_of_memory;
			defer allocator.free(pkg_json_path);
			const lockfile_path = std.fmt.allocPrintSentinel(allocator, "{s}/ant.lockb", .{global_dir}, 0) catch return .out_of_memory;
			defer allocator.free(lockfile_path);
			const nm_path = std.fmt.allocPrintSentinel(allocator, "{s}/node_modules", .{global_dir}, 0) catch return .out_of_memory;
			defer allocator.free(nm_path);

			const add_result = pkg_add_many(c, pkg_json_path.ptr, package_specs, count, false);
			if (add_result != .ok) return add_result;

			const install_result = pkg_resolve_and_install(c, pkg_json_path.ptr, lockfile_path.ptr, nm_path.ptr);
			if (install_result != .ok) return install_result;

			for (0..count) \|i\| {
			const spec_str = std.mem.span(package_specs[i]);
			var pkg_name: []const u8 = spec_str;

			if (std.mem.indexOf(u8, spec_str, "@")) \|at_idx\| {
			if (at_idx == 0) {
			if (std.mem.indexOfPos(u8, spec_str, 1, "@")) \|second_at\| pkg_name = spec_str[0..second_at];
			} else pkg_name = spec_str[0..at_idx];
			}

			linkGlobalBins(allocator, nm_path, pkg_name);
			}

			return .ok;
			}

			export fn pkg_remove_global(
			ctx: ?*PkgContext,
			package_name: [*:0]const u8,
			) PkgError {
			const c = ctx orelse return .invalid_argument;
			const allocator = c.allocator;

			const global_dir = getGlobalDir(allocator) catch {
			c.setError("HOME not set");
			return .invalid_argument;
			};
			defer allocator.free(global_dir);

			const pkg_json_path = std.fmt.allocPrintSentinel(allocator, "{s}/package.json", .{global_dir}, 0) catch return .out_of_memory;
			defer allocator.free(pkg_json_path);
			const lockfile_path = std.fmt.allocPrintSentinel(allocator, "{s}/ant.lockb", .{global_dir}, 0) catch return .out_of_memory;
			defer allocator.free(lockfile_path);
			const nm_path = std.fmt.allocPrintSentinel(allocator, "{s}/node_modules", .{global_dir}, 0) catch return .out_of_memory;
			defer allocator.free(nm_path);

			const name_str = std.mem.span(package_name);

			unlinkGlobalBins(allocator, name_str);

			const remove_result = pkg_remove(c, pkg_json_path.ptr, package_name);
			if (remove_result != .ok and remove_result != .not_found) return remove_result;
			if (remove_result == .not_found) return .not_found;

			const install_result = pkg_resolve_and_install(c, pkg_json_path.ptr, lockfile_path.ptr, nm_path.ptr);
			if (install_result != .ok) return install_result;

			return .ok;
			}

			export fn pkg_count_local(ctx: ?*PkgContext) u32 {
			var pd = cli.get_dependencies(ctx, null, true) orelse return 0;
			defer pd.deinit(); return pd.count();
			}

			export fn pkg_count_global(ctx: ?*PkgContext) u32 {
			const global_dir = getGlobalDir(global_allocator) catch return 0;
			var pd = cli.get_dependencies(ctx, global_dir, false) orelse return 0;
			defer pd.deinit(); return pd.count();
			}

			export fn pkg_list_local(
			ctx: ?*PkgContext,
			callback: ?const fn (name: [:0]const u8, version: [:0]const u8, user_data: ?anyopaque) callconv(.c) void,
			user_data: ?*anyopaque,
			) PkgError {
			var pd = cli.get_dependencies(ctx, null, true) orelse return .ok;
			defer pd.deinit();
			if (callback) \|cb\| cli.list_dependencies(&pd, cb, user_data);
			return .ok;
			}

			export fn pkg_list_global(
			ctx: ?*PkgContext,
			callback: ?const fn (name: [:0]const u8, version: [:0]const u8, user_data: ?anyopaque) callconv(.c) void,
			user_data: ?*anyopaque,
			) PkgError {
			const global_dir = getGlobalDir(global_allocator) catch return .invalid_argument;
			var pd = cli.get_dependencies(ctx, global_dir, false) orelse return .ok;
			defer pd.deinit();
			if (callback) \|cb\| cli.list_dependencies(&pd, cb, user_data);
			return .ok;
			}

Owner Packages

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ant/src/pkg/root.zig899dad6b8a9etype-hints-typescript

root.zigView Options

Owner Packages

ant/src/pkg/root.zig
899dad6b8a9etype-hints-typescript

root.zig
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