Unexport errors returned by the filer package #4156
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pietern
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shreyas-goenka
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Dec 18, 2025
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Commit: fb49611
30 interesting tests: 14 KNOWN, 7 flaky, 6 RECOVERED, 2 FAIL, 1 SKIP
Top 50 slowest tests (at least 2 minutes):
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denik
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| _, _, err = testcli.RequireErrorRun(t, ctx, "fs", "cat", path.Join(tmpDir, "dir1")) | ||
| assert.ErrorAs(t, err, &filer.NotAFile{}) | ||
| assert.ErrorIs(t, err, fs.ErrInvalid) |
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unrelated to this PR, but is fs.ErrInvalid a correct error to use? The docs say "invalid argument", implies bad arguments passed to the function, not an issue with remote object being a wrong type.
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Good point. The fs package doesn't have a better alternative. But if we need one, we could add a few constants to libs/filer for more specific checks.
denik
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Dec 18, 2025
| switch { | ||
| case errors.Is(err, fs.ErrNotExist): | ||
| return NoSuchDirectoryError{path: absPath} | ||
| return noSuchDirectoryError{path: absPath} |
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why replace fs.ErrNotExists with noSuchDirectoryError which pretends to be fs.ErrNotExist ?
People checking Is() will not see the difference.
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It normalizes the string Error() to be the same.
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Why
Some call sites depended on the underlying type of the error. All callers can rely on error equivalence with the
fs.Err*errors instead. The next step is to include the underlying errors in case callers need access to additional error details. This can use the error wrapping/unwrapping pattern.Tests
Unit tests pass.