Summary
SkipDirs / SkipFiles / ignore-rule lookups in FileIndexer.cs:1416, 1509 perform exact-case basename matching even on case-insensitive filesystems (macOS HFS+/APFS default, Windows NTFS, ExFAT). A user who adds node_modules to the skip list but whose project happens to contain Node_Modules/ (different casing on the same volume) gets the directory walked. The class already tracks an _ignoreCase hint elsewhere, but it is not consulted at the skip lookup. Symmetrically, on case-sensitive filesystems containing two directories Foo/ and foo/, an ignore rule for foo matches only one — surprising for users moving cross-platform.
Where
src/CodeIndex/Indexer/Scanning/FileIndexer.cs:1416 (skip-dir lookup)src/CodeIndex/Indexer/Scanning/FileIndexer.cs:1509 (skip-file lookup)
Suggested approach
(1) Detect filesystem case-sensitivity once per workspace root (probe by creating two files differing only in case in a tmp dir under the workspace, or by reading the O_PATH/macOS pathconf(_PC_CASE_SENSITIVE)). (2) Cache the result on the scanner and use case-insensitive matching for skip lists when the workspace FS is case-insensitive. (3) Document the policy: "Ignore rules match case-insensitively on case-insensitive filesystems". (4) Add a --ignore-case-sensitivity=auto|strict|loose override for users who want explicit control. (5) Add regression tests on macOS/Linux runners that create both casings and assert the ignore rule fires correctly. (6) Cross-link with #1633 (IgnoreRules) — same family.
Summary
SkipDirs/SkipFiles/ ignore-rule lookups inFileIndexer.cs:1416, 1509perform exact-case basename matching even on case-insensitive filesystems (macOS HFS+/APFS default, Windows NTFS, ExFAT). A user who addsnode_modulesto the skip list but whose project happens to containNode_Modules/(different casing on the same volume) gets the directory walked. The class already tracks an_ignoreCasehint elsewhere, but it is not consulted at the skip lookup. Symmetrically, on case-sensitive filesystems containing two directoriesFoo/andfoo/, an ignore rule forfoomatches only one — surprising for users moving cross-platform.Where
src/CodeIndex/Indexer/Scanning/FileIndexer.cs:1416(skip-dir lookup)src/CodeIndex/Indexer/Scanning/FileIndexer.cs:1509(skip-file lookup)Suggested approach
(1) Detect filesystem case-sensitivity once per workspace root (probe by creating two files differing only in case in a tmp dir under the workspace, or by reading the
O_PATH/macOSpathconf(_PC_CASE_SENSITIVE)). (2) Cache the result on the scanner and use case-insensitive matching for skip lists when the workspace FS is case-insensitive. (3) Document the policy: "Ignore rules match case-insensitively on case-insensitive filesystems". (4) Add a--ignore-case-sensitivity=auto|strict|looseoverride for users who want explicit control. (5) Add regression tests on macOS/Linux runners that create both casings and assert the ignore rule fires correctly. (6) Cross-link with #1633 (IgnoreRules) — same family.