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Precompose filenames to NFC on macOS when matching archive ignore patterns - #23566
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| // to on for macOS; we mirror that gating so our ignore matching agrees with | ||
| // git's on the same filesystem. | ||
| // | ||
| // It is a var rather than a const so tests can exercise the precompose path on |
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As long as TestIgnorePrecomposesUnicode is running on macOS does it really make sense to mutate this to also test on linux? Feels like we could simplify and just move this into the method, and run the test with the gitignore and file created via the NFC name, and on macOS that implicitly gets decomposed so running the test checks that precompose is working.
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Good call on dropping the package-level var and the Linux machinery — done. But I couldn't take the "create it via NFC and let macOS decompose it" route: that's HFS+ behavior, and modern macOS defaults to APFS, which is normalization-preserving (it stores the exact bytes you write and only compares insensitively). I verified on my box — write NFC, readdir hands back NFC; write NFD, readdir hands back NFD. So an NFC-on-disk name never comes back decomposed, and that test passes even with precomposeUnicode stubbed to a no-op — i.e. it wouldn't actually exercise the fix.
So the test now writes the on-disk name explicitly in NFD (robust: NFD-in gives NFD-back on both APFS and HFS+) with an NFC .gitignore pattern, and skips on non-darwin since the code path is darwin-only anyway. I confirmed it fails without the fix and passes with it. No more mutation, no more Linux path — just the real macOS behavior.
The archive ignore matcher (used by template and policy-pack publish, and honoring .gitignore files) compared filesystem entry names against ignore patterns byte/rune-exact, with no Unicode normalization. macOS stores filenames in a decomposed (roughly NFD) form, so a name like "café" read back from readdir is a different rune sequence than the composed (NFC) "café" a user typically types into a .gitignore. The pattern then fails to match and the file is archived despite being ignored. Mirror git's core.precomposeunicode: on macOS, precompose directory-entry names to NFC before matching. Gated to macOS for the same reason git gates it -- on a decomposing filesystem the NFC name still resolves to the same file, while on a byte-preserving filesystem rewriting the name could point at a file that does not exist. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Drop the package-level precomposeUnicodeFS var and its test-time mutation, inlining the darwin check into precomposeUnicode. The test now runs only on macOS against a real NFD-on-disk name, which genuinely exercises the precompose path (APFS preserves the bytes we write rather than decomposing them, so the previous NFC-on-disk approach would have passed trivially). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Description
When archiving a directory for upload (
pulumi template publishand policy-pack publish), we honor.gitignorefiles plus a set of default excludes. The matcher compared filesystem entry names against ignore patterns byte/rune-exact, with no Unicode normalization.macOS stores filenames in a decomposed (roughly NFD) form, so a name like
caféread back fromreaddiris a different rune sequence than the composed (NFC)caféa user typically types into a.gitignore. The pattern then fails to match, and the file is included in the archive even though the user intended to exclude it.This mirrors git's own
core.precomposeunicodebehavior (default-on for macOS): precompose directory-entry names to NFC before matching. Since we read and honor.gitignorefiles, matching git here is the correct behavior. The normalization is gated to macOS for the same reason git gates it — on a decomposing filesystem the NFC name still resolves to the same file, whereas on a byte-preserving filesystem (Linux) rewriting the name could point at a file that doesn't exist.Changes
precompose.go:precomposeUnicode(name)returns the NFC form on filesystems that decompose Unicode (macOS), and the name unchanged elsewhere.archive.go: precompose each directory-entry name at the single point where it enters the path used for matching, the tar header, and file open.TestIgnorePrecomposesUnicode: an NFD-on-disk directory with an NFC.gitignorepattern is correctly excluded. Verified it fails without the fix.golang.org/x/textfrom indirect to direct insdk/go.mod(effective version unchanged).Test plan
cd sdk && go test ./go/common/util/archive/ -count=1passes, including the new test..gitignorethat should match it; confirm the file is now excluded from the archive (was previously included).🤖 Generated with Claude Code
Internal tracking: pulumi/home#4807