Function firstLine

internal/diff/git.go:549–556

firstLine returns the first non-empty trimmed line of git output, so a stray trailing newline or an unexpected second line never pollutes a resolved SHA.

(out string)

// firstLine returns the first non-empty trimmed line of git output, so a stray
// trailing newline or an unexpected second line never pollutes a resolved SHA.
func firstLine(out string) string {
	for _, line := range strings.Split(out, "\n") {
		if s := strings.TrimSpace(line); s != "" {
			return s
		}
	}
	return ""
}

func (p *Provider) workspaceTrackedDiff(ctx context.Context) (string, error) {
	out, err := p.runGit(ctx, "-c", "core.quotepath=false", "diff", "--no-ext-diff", "--no-textconv", "--find-renames", "--src-prefix=a/", "--dst-prefix=b/", "--no-color", "-U"+fmt.Sprint(DiffContextLines), "--end-of-options", "HEAD", "--")