Function trimPath

internal/report/source.go:1036–1064

trimPath cleans up a path by removing prefixes that are commonly found on profiles plus configured prefixes. TODO(aalexand): Consider optimizing out the redundant work done in this function if it proves to matter.

(path, trimPath, searchPath string)

// TODO(aalexand): Consider optimizing out the redundant work done in this
// function if it proves to matter.
func trimPath(path, trimPath, searchPath string) string {
	// Keep path variable intact as it's used below to form the return value.
	sPath, searchPath := filepath.ToSlash(path), filepath.ToSlash(searchPath)
	if trimPath == "" {
		// If the trim path is not configured, try to guess it heuristically:
		// search for basename of each search path in the original path and, if
		// found, strip everything up to and including the basename. So, for
		// example, given original path "/some/remote/path/my-project/foo/bar.c"
		// and search path "/my/local/path/my-project" the heuristic will return
		// "/my/local/path/my-project/foo/bar.c".
		for _, dir := range filepath.SplitList(searchPath) {
			want := "/" + filepath.Base(dir) + "/"
			if found := strings.Index(sPath, want); found != -1 {
				return path[found+len(want):]
			}
		}
	}
	// Trim configured trim prefixes.
	trimPaths := append(filepath.SplitList(filepath.ToSlash(trimPath)), "/proc/self/cwd/./", "/proc/self/cwd/")
	for _, trimPath := range trimPaths {
		if !strings.HasSuffix(trimPath, "/") {
			trimPath += "/"
		}
		if strings.HasPrefix(sPath, trimPath) {
			return path[len(trimPath):]
		}
	}
	return path
}

func indentation(line string) int {
	column := 0