An ignore rule naming a directory with an accent silently does nothing on
macOS, and the files it was meant to exclude get scanned anyway.
macOS (APFS/HFS+) returns filenames in NFD — "ç" comes back as "c" + U+0327
COMBINING CEDILLA — while editors write ignore files in NFC, where the same
"ç" is the single codepoint U+00E7. The two render identically and compare
unequal, so `fnmatch` never matches and the pattern is a no-op.
Found in a real repo: a `.graphifyignore` containing `Orçamento/` failed to
exclude that directory, and 9 client contract PDFs were picked up for semantic
extraction — i.e. queued to be sent to an LLM — despite an explicit rule
against it. The failure is silent: there is no warning, and the only symptom
is a file count that does not match what you expect. A user who does not
count would never know. That is what makes this worth fixing rather than
documenting: the rule appears to work.
Both sides are now normalized to NFC before matching, at three boundaries:
the pattern (in `_parse_gitignore_line`, so it covers .graphifyignore,
.gitignore and $GIT_DIR/info/exclude alike) and the two path forms used in
`_is_ignored` (`target.name` and the anchor-relative path).
NFC is already the form Linux and Windows produce, so this is a no-op there
and only repairs the macOS mismatch.
Tests: two regression tests cover both directions (NFC pattern vs NFD path on
disk, and the reverse); both fail before this change and pass after. A third
asserts ASCII patterns are unaffected, so the normalization cannot regress
existing behavior.
Full suite: 3833 passed. The 13 failures in tests/test_terraform.py are
pre-existing on a clean upstream checkout (optional tree_sitter_hcl not
installed) and unrelated to this change.
Bruno Santanna
5ffaaa606a