fix(build): select the core Zig project explicitly

scripts/verify-zig-core-project.tsadded+30-0

Changes to scripts/verify-zig-core-project.ts

		@@ -0,0 +1,30 @@
	1	+import { existsSync, mkdtempSync, mkdirSync, readFileSync, rmSync, writeFileSync } from 'node:fs'
	2	+import { join, resolve } from 'node:path'
	3	+import { resolveZig } from './zig'
	4	+
	5	+const source = resolve(import.meta.dir, '..')
	6	+const zig = resolveZig(source)
	7	+console.log('Tracked core project:', JSON.stringify({ file: join(source, 'packages/zig/build.zig'), exists: existsSync(join(source, 'packages/zig/build.zig')) }))
	8	+// Keep the fixture on the checkout's volume. Hosted Windows keeps the
	9	+// checkout on D: and the system temporary directory/compiler cache on C:.
	10	+const root = mkdtempSync(join(source, '.zig-core-project-'))
	11	+const core = join(root, 'packages', 'zig')
	12	+try {
	13	+ mkdirSync(core, { recursive: true })
	14	+ writeFileSync(join(root, 'pantry.lock'), readFileSync(join(source, 'pantry.lock')))
	15	+ writeFileSync(join(root, 'package.json'), JSON.stringify({ version: '1.2.3' }))
	16	+ writeFileSync(join(root, 'build.zig'), 'const std=; pub fn build(b:*std.Build) void {_=b.standardOptimizeOption(.{});}\n')
	17	+ writeFileSync(join(core, 'build.zig'), 'const std=; pub fn build(b:*std.Build) void {_=b.standardOptimizeOption(.{}); const version=b.option([]const u8,"version","version") orelse "missing"; std.debug.print("PROJECT_VERSION={s}\\n",.{version});}\n')
	18	+ const env = { ...process.env, CRAFT_ZIG: zig.path }
	19	+ const runner = join(root, 'runner.ts')
	20	+ writeFileSync(runner, `import {runZig} from ${JSON.stringify(join(source, 'scripts/zig.ts'))};process.exitCode=runZig(${JSON.stringify(root)},['--core','--versioned','build']);\n`)
	21	+ const result = Bun.spawnSync([process.execPath, runner], { cwd: root, env, stdout: 'pipe', stderr: 'pipe' })
	22	+ console.log(result.stdout.toString(), result.stderr.toString())
	23	+ // The root wrapper rejects -Dversion. A successful configure therefore
	24	+ // proves core selection even when Zig reuses its cached configuration.
	25	+ if (result.exitCode !== 0)
	26	+ throw new Error('The actual pinned compiler did not configure the selected core project with its package version.')
	27	+}
	28	+finally {
	29	+ rmSync(root, { recursive: true, force: true })
	30	+}