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cli.zig
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cli.zig
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const std = @import("std");
const root = @import("root.zig");
const ListCallback =
*const fn ([*:0]const u8, [*:0]const u8, ?*anyopaque) callconv(.c) void;
const PkgDeps = struct {
deps: ?std.json.ObjectMap,
dev_deps: ?std.json.ObjectMap,
nm_path: []const u8,
arena: std.mem.Allocator,
parsed: std.json.Parsed(std.json.Value),
pub fn deinit(self: *PkgDeps) void {
self.parsed.deinit();
}
pub fn count(self: *const PkgDeps) u32 {
var c: u32 = 0;
if (self.deps) |d| c += @intCast(d.count());
if (self.dev_deps) |d| c += @intCast(d.count());
return c;
}
};
fn emitPkg(pd: *PkgDeps, name: []const u8, cb: ListCallback, ud: ?*anyopaque) void {
const pkg_json = std.fmt.allocPrint(pd.arena, "{s}/{s}/package.json", .{pd.nm_path, name}) catch return;
const content = std.fs.cwd().readFileAlloc(pd.arena, pkg_json, 256 * 1024) catch return;
const parsed = std.json.parseFromSlice(std.json.Value, pd.arena, content, .{}) catch return;
defer parsed.deinit();
const ver = if (parsed.value.object.get("version")) |v| if (v == .string) v.string else "?" else "?";
cb(pd.arena.dupeZ(u8, name) catch return, pd.arena.dupeZ(u8, ver) catch return, ud);
}
pub fn get_dependencies(ctx: ?*root.PkgContext, base_path: ?[]const u8, include_dev: bool) ?PkgDeps {
const c = ctx orelse return null;
_ = c.arena_state.reset(.retain_capacity);
const arena = c.arena_state.allocator();
const pkg_json_path = if (base_path) |bp| std.fmt.allocPrint(arena, "{s}/package.json", .{bp}) catch return null
else arena.dupe(u8, "package.json") catch return null;
const nm_path = if (base_path) |bp| std.fmt.allocPrint(arena, "{s}/node_modules", .{bp}) catch return null
else arena.dupe(u8, "node_modules") catch return null;
const content = std.fs.cwd().readFileAlloc(arena, pkg_json_path, 1024 * 1024) catch return null;
const parsed = std.json.parseFromSlice(std.json.Value, arena, content, .{}) catch return null;
const deps_val = parsed.value.object.get("dependencies");
const deps = if (deps_val) |v| if (v == .object) v.object else null else null;
const dev_deps = if (include_dev) blk: {
const dev_val = parsed.value.object.get("devDependencies");
break :blk if (dev_val) |v| if (v == .object) v.object else null else null;
} else null;
if (deps == null and dev_deps == null) {
var p = parsed;
p.deinit();
return null;
}
return .{ .deps = deps, .dev_deps = dev_deps, .nm_path = nm_path, .arena = arena, .parsed = parsed };
}
pub fn list_dependencies(pd: *PkgDeps, cb: ListCallback, ud: ?*anyopaque) void {
if (pd.deps) |d| for (d.keys()) |n| emitPkg(pd, n, cb, ud);
if (pd.dev_deps) |d| for (d.keys()) |n| emitPkg(pd, n, cb, ud);
}

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