Function GetDiffShortStat

git/api/diff.go:668–698

GetDiffShortStat counts number of changed files, number of additions and deletions.

(
	ctx context.Context,
	repoPath string,
	ignoreWhitespace bool,
	args ...string,
)

// GetDiffShortStat counts number of changed files, number of additions and deletions.
func GetDiffShortStat(
	ctx context.Context,
	repoPath string,
	ignoreWhitespace bool,
	args ...string,
) (DiffShortStat, error) {
	// Now if we call:
	// $ git diff --shortstat 1ebb35b98889ff77299f24d82da426b434b0cca0...788b8b1440462d477f45b0088875
	// we get:
	// " 9902 files changed, 2034198 insertions(+), 298800 deletions(-)\n"

	cmd := command.New("diff",
		command.WithFlag("--shortstat"),
		command.WithArg(args...),
	)

	if ignoreWhitespace {
		// Ignore whitespace when comparing lines.
		cmd.Add(command.WithFlag("-w"))
	}

	stdout := &bytes.Buffer{}
	if err := cmd.Run(ctx,
		command.WithDir(repoPath),
		command.WithStdout(stdout),
	); err != nil {
		return DiffShortStat{}, err
	}

	return parseDiffStat(stdout.String())
}

var shortStatFormat = regexp.MustCompile(
	`\s*(\d+) files? changed(?:, (\d+) insertions?\(\+\))?(?:, (\d+) deletions?\(-\))?`)