Function IsFileModified

git/git.go:1609–1648

IsFileModified returns whether the filepath specified is modified according to `git status`. A file is modified if it has uncommitted changes in the working copy or the index. This includes being untracked.

(filepath string)

// to `git status`. A file is modified if it has uncommitted changes in the
// working copy or the index. This includes being untracked.
func IsFileModified(filepath string) (bool, error) {

	args := []string{
		"-c", "core.quotepath=false", // handle special chars in filenames
		"status",
		"--porcelain",
		"--", // separator in case filename ambiguous
		filepath,
	}
	cmd, err := git(args...)
	if err != nil {
		return false, lfserrors.Wrap(err, tr.Tr.Get("failed to find `git status`"))
	}
	outp, err := cmd.StdoutPipe()
	if err != nil {
		return false, lfserrors.Wrap(err, tr.Tr.Get("Failed to call `git status`"))
	}
	if err := cmd.Start(); err != nil {
		return false, lfserrors.Wrap(err, tr.Tr.Get("Failed to start `git status`"))
	}
	matched := false
	for scanner := bufio.NewScanner(outp); scanner.Scan(); {
		line := scanner.Text()
		// Porcelain format is "<I><W> <filename>"
		// Where <I> = index status, <W> = working copy status
		if len(line) > 3 {
			// Double-check even though should be only match
			if strings.TrimSpace(line[3:]) == filepath {
				matched = true
				// keep consuming output to exit cleanly
				// will typically fall straight through anyway due to 1 line output
			}
		}
	}
	if err := cmd.Wait(); err != nil {
		return false, lfserrors.Wrap(err, tr.Tr.Get("`git status` failed"))
	}

	return matched, nil
}

// IsWorkingCopyDirty returns true if and only if the working copy in which the
// command was executed is dirty as compared to the index.