44 lines
1.7 KiB
TypeScript
44 lines
1.7 KiB
TypeScript
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import { strict as assert } from 'node:assert';
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import { test } from 'node:test';
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import { readdirSync } from 'node:fs';
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import { join } from 'node:path';
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/**
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* Guard against same-directory filenames that differ only by case (e.g.
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* `threadSummary.ts` vs `ThreadSummary.tsx`). On case-insensitive filesystems
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* (the Windows release runner) an extensionless import of one can resolve to
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* the OTHER file — rolldown tries `.ts` before `.tsx` — producing
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* MISSING_EXPORT failures that never reproduce on the Linux/macOS machines the
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* project is developed and web-deployed on. This broke the desktop release
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* build twice before being diagnosed; this test makes the collision a local,
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* immediate failure instead.
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*/
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const findCaseCollisions = (dir: string, collisions: string[]): void => {
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const entries = readdirSync(dir, { withFileTypes: true });
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const seen = new Map<string, string>();
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entries.forEach((entry) => {
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// Compare basenames without extension: `Foo.tsx` collides with `foo.ts`
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// because module resolution is extensionless.
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const stem = entry.isDirectory() ? entry.name : entry.name.replace(/\.[^.]+$/, '');
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const key = stem.toLowerCase();
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const existing = seen.get(key);
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if (existing !== undefined && existing !== stem) {
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collisions.push(`${dir}: "${existing}" vs "${stem}"`);
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}
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if (existing === undefined) seen.set(key, stem);
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if (entry.isDirectory()) {
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findCaseCollisions(join(dir, entry.name), collisions);
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}
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});
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};
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test('no same-directory filenames differing only by case under src/', () => {
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const collisions: string[] = [];
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findCaseCollisions('src', collisions);
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assert.deepEqual(
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collisions,
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[],
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`Case-colliding names break Windows builds:\n${collisions.join('\n')}`,
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);
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});
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