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test: clean up tests writing to tracked files, prevent future violations - #14772
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This PR stops the test suite from leaving scratch files inside the tracked source tree, so that a test run no longer shows up as a dirty working copy. The `ltarStable` Lake test now copies its package into `work/` (already ignored, and the idiom `srcHash` uses) instead of appending a comment to the tracked `Test/A.lean` and dropping `out*.jsonl`, `bundles*.txt`, `staging/` and `Test/A.lean.bak` next to it. The two `compact_closure` compile tests adopt the `_tmp_` prefix that `tests/compile/.gitignore` documents. The remaining cases are cleanup targets that no ignore rule covered: `manifest/lake-packages`, `toml/toml-test`, `bench/size/install`, `clone/lean-toolchain`, `init/mathlib_standards` and `rebuild/Foo/`. Scratch `produced.*` output under `tests/pkg` is now covered by one rule in `tests/pkg/.gitignore` rather than per-package copies. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This PR stops several Lake tests from editing files inside the checked-in source tree, so that a test run no longer shows up as a dirty working copy. `copy_to_work` in `tests/lake/tests/common.sh` replaces the copy-into-`work/` preamble seven tests had spelled out, and additionally makes the copies writable, since `cp` propagates the source mode. `shake` and `updateUnknown` move onto it too: `shake` copied `input/*` over its own test directory, which had left `DepMain.lean` tracked because `.gitignore` transposed the name to `MainDep.lean`, and `updateUnknown` rewrote its tracked `lakefile.toml` in place and leaked `lakefile.toml.bak` whenever a run died before the restoring `mv`. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This PR makes CI fail when a test writes into the checked-in source tree, so that scratch output has to go to an ignored path instead. Tracked files are made read-only for the duration of the test run, and `git status` is compared before and after it. The two halves catch different things: the comparison finds byproducts a test leaves behind, while the read-only bit also catches a test that edits a tracked file and restores it afterwards, which the comparison cannot see. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The Windows job runs the test suite as well, and MSYS2 honors `chmod`; `tests/lake/tests/cache` already relies on that. The tree comparison never needed the exemption at all, it only inherited it because `tree-before` is captured in the `chmod` step. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Fixes even more tests writing to tracked files, which can create a mess with version control. Makes tracked files read-only during CI test runs and checks for new untracked and non-ignored files afterwards to prevent future violations.