1package repository
 2
 3import (
 4	"bytes"
 5	"fmt"
 6	"io"
 7	"strings"
 8
 9	"golang.org/x/sys/execabs"
10)
11
12// gitCli is a helper to launch CLI git commands
13type gitCli struct {
14	path string
15}
16
17// Run the given git command with the given I/O reader/writers, returning an error if it fails.
18func (cli gitCli) runGitCommandWithIO(stdin io.Reader, stdout, stderr io.Writer, args ...string) error {
19	// make sure that the working directory for the command
20	// always exist, in particular when running "git init".
21	path := strings.TrimSuffix(cli.path, ".git")
22
23	// fmt.Printf("[%s] Running git %s\n", path, strings.Join(args, " "))
24
25	cmd := execabs.Command("git", args...)
26	cmd.Dir = path
27	cmd.Stdin = stdin
28	cmd.Stdout = stdout
29	cmd.Stderr = stderr
30
31	return cmd.Run()
32}
33
34// Run the given git command and return its stdout, or an error if the command fails.
35func (cli gitCli) runGitCommandRaw(stdin io.Reader, args ...string) (string, string, error) {
36	var stdout bytes.Buffer
37	var stderr bytes.Buffer
38	err := cli.runGitCommandWithIO(stdin, &stdout, &stderr, args...)
39	return strings.TrimSpace(stdout.String()), strings.TrimSpace(stderr.String()), err
40}
41
42// Run the given git command and return its stdout, or an error if the command fails.
43func (cli gitCli) runGitCommandWithStdin(stdin io.Reader, args ...string) (string, error) {
44	stdout, stderr, err := cli.runGitCommandRaw(stdin, args...)
45	if err != nil {
46		if stderr == "" {
47			stderr = "Error running git command: " + strings.Join(args, " ")
48		}
49		err = fmt.Errorf(stderr)
50	}
51	return stdout, err
52}
53
54// Run the given git command and return its stdout, or an error if the command fails.
55func (cli gitCli) runGitCommand(args ...string) (string, error) {
56	return cli.runGitCommandWithStdin(nil, args...)
57}