Function matchGitignorePattern

internal/diff/git.go:206–239

matchGitignorePattern checks if relPath matches a single .gitignore pattern.

(relPath, pat string)

// matchGitignorePattern checks if relPath matches a single .gitignore pattern.
func matchGitignorePattern(relPath, pat string) bool {
	// Directory-only patterns (trailing /)
	if before, ok := strings.CutSuffix(pat, "/"); ok {
		dirName := before
		// Match if any path segment equals the dir name
		segments := strings.Split(relPath, "/")
		return slices.Contains(segments, dirName)
	}

	// Negation patterns are not needed for exclusion purposes
	if strings.HasPrefix(pat, "!") {
		return false
	}

	// Patterns without / match basename
	if !strings.Contains(pat, "/") {
		base := filepath.Base(relPath)
		if matched, _ := filepath.Match(pat, base); matched {
			return true
		}
		return false
	}

	// Patterns with / match against the full relative path
	if matched, _ := filepath.Match(pat, relPath); matched {
		return true
	}
	// Also try matching against suffix of path
	if strings.HasSuffix(relPath, pat) {
		return true
	}

	return false
}

// filterDiffs removes diffs whose file paths are excluded.
func (p *Provider) filterDiffs(diffs []model.Diff) []model.Diff {