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test: run assembled setup harness scripts from a temp file, not bash -c argv (Windows MSYS2 8 KB truncation)

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windows-free-tests (run 33907177851) failed in
test/setup-alias-name-uniqueness.test.ts with
  bash: -c: line 178: unexpected EOF while looking for matching `'
The harness slices functions out of `setup` and passed the joined script as
one `bash -c` argv element. The ownership gate grew that script from 6.7 KB
to 15.7 KB, and on Windows bash is an MSYS2 program: when its parent is a
non-MSYS process (bun), msys-2.0.dll's build_argv() runs any argument
containing `?*["'(){}` through globify()/glob(), which copies the pattern
into a fixed `Char patbuf[8192]` and silently stops after 8192 - MB_CUR_MAX
(8186 chars under C.UTF-8); GLOB_NOCHECK then returns the truncated text as
the argument. Character 8186 lands inside the single-quoted sed token on
line 178. Rebuilding the exact script with CI path shapes and cutting it at
8186-8190 characters reproduces the identical message locally; cmd.exe's
8191-UTF-16 cap and CreateProcess's 32767 do not fit the evidence.

Fix: test/helpers/bash-script.ts writes the script to a temp file and runs
`bash <path>` — a short glob-free argument that never enters globify. Every
setup harness that assembled a script for `bash -c` (11 files, 22 sites)
uses it; timeouts and env are preserved verbatim, spawn/timeout errors are
appended to stderr, temp cleanup is best-effort. `spawnSync('bash',
[<Windows absolute path>])` already passes on windows-latest in setup-help,
uninstall-windows-copies and the migration tests. The Windows-curated list
is byte-identical before and after.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This commit is contained in:
Garry Tan
2026-09-04 23:05:59 +00:00
co-authored by Claude Fable 5.1
parent e64bab7a00
commit 1204828699
12 changed files with 92 additions and 42 deletions
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test/user-render-out-dir-install.test.ts
+4 -3
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@@ -14,6 +14,7 @@
*/
import { describe, test, expect } from 'bun:test';
import { spawnSync } from 'child_process';
import { runBashScript } from './helpers/bash-script';
import * as fs from 'fs';
import * as os from 'os';
import * as path from 'path';
@@ -86,7 +87,7 @@ describe(':user render targets the out-dir, never the checkout (#2569)', () => {
extractFn(src, '_swap_in_render'),
`_swap_in_render "${live}" "${fresh}"`,
].join('\n');
const r = spawnSync('bash', ['-c', script], { encoding: 'utf-8', timeout: 15_000 });
const r = runBashScript(script, { timeout: 15_000 });
expect(r.status).toBe(0);
// Live dir now serves the fresh render at the SAME path (links into
// it stay valid), tmp and .old are gone.
@@ -126,7 +127,7 @@ describe(':user render targets the out-dir, never the checkout (#2569)', () => {
' echo "render failed — previous render left in place" >&2',
'fi',
].join('\n');
const r = spawnSync('bash', ['-c', script], { encoding: 'utf-8', timeout: 15_000 });
const r = runBashScript(script, { timeout: 15_000 });
expect(r.status).toBe(0);
expect(fs.readFileSync(path.join(live, 'ship', 'SKILL.md'), 'utf-8')).toBe('previous-render\n');
// The installed symlink still resolves — the skill set did not vanish.
@@ -191,7 +192,7 @@ describe('link_claude_skill_dirs prefers rendered SKILL.md (behavior)', () => {
extractFn(SETUP_SRC, 'link_claude_skill_dirs'),
`link_claude_skill_dirs "${src}" "${skills}"`,
].join('\n');
const r = spawnSync('bash', ['-c', script], { encoding: 'utf-8', timeout: 15_000 });
const r = runBashScript(script, { timeout: 15_000 });
expect(r.status).toBe(0);
expect(fs.readFileSync(path.join(skills, 'alpha', 'SKILL.md'), 'utf-8')).toContain('rendered-alpha');