cli/pkg/cmd/extensions/manager.go
Mislav Marohnić 4bdddd72d3 Allow installing local extensions via symlinks
This also quits searching for local extensions in PATH.
2021-06-03 19:06:28 +02:00

121 lines
2.6 KiB
Go

package extensions
import (
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path"
"path/filepath"
"strings"
"github.com/cli/cli/internal/config"
"github.com/cli/safeexec"
)
type Manager struct {
dataDir func() string
lookPath func(string) (string, error)
}
func NewManager() *Manager {
return &Manager{
dataDir: config.ConfigDir,
lookPath: safeexec.LookPath,
}
}
func (m *Manager) Dispatch(args []string, stdin io.Reader, stdout, stderr io.Writer) (bool, error) {
if len(args) == 0 {
return false, errors.New("too few arguments in list")
}
var exe string
extName := "gh-" + args[0]
forwardArgs := args[1:]
for _, e := range m.List() {
if filepath.Base(e) == extName {
exe = e
break
}
}
if exe == "" {
return false, nil
}
// TODO: parse the shebang on Windows and invoke the correct interpreter instead of invoking directly
externalCmd := exec.Command(exe, forwardArgs...)
externalCmd.Stdin = stdin
externalCmd.Stdout = stdout
externalCmd.Stderr = stderr
return true, externalCmd.Run()
}
func (m *Manager) List() []string {
dir := m.installDir()
entries, err := ioutil.ReadDir(dir)
if err != nil {
return nil
}
var results []string
for _, f := range entries {
if !strings.HasPrefix(f.Name(), "gh-") || !(f.IsDir() || f.Mode()&os.ModeSymlink != 0) {
continue
}
results = append(results, filepath.Join(dir, f.Name(), f.Name()))
}
return results
}
func (m *Manager) InstallLocal(dir string) error {
name := filepath.Base(dir)
targetDir := filepath.Join(m.installDir(), name)
return os.Symlink(dir, targetDir)
}
func (m *Manager) Install(cloneURL string, stdout, stderr io.Writer) error {
exe, err := m.lookPath("git")
if err != nil {
return err
}
name := strings.TrimSuffix(path.Base(cloneURL), ".git")
targetDir := filepath.Join(m.installDir(), name)
externalCmd := exec.Command(exe, "clone", cloneURL, targetDir)
externalCmd.Stdout = stdout
externalCmd.Stderr = stderr
return externalCmd.Run()
}
func (m *Manager) Upgrade(stdout, stderr io.Writer) error {
exe, err := m.lookPath("git")
if err != nil {
return err
}
exts := m.List()
if len(exts) == 0 {
return errors.New("no extensions installed")
}
for _, f := range exts {
fmt.Fprintf(stdout, "[%s]: ", filepath.Base(f))
dir := filepath.Dir(f)
externalCmd := exec.Command(exe, "-C", dir, "--git-dir="+filepath.Join(dir, ".git"), "pull", "--ff-only")
externalCmd.Stdout = stdout
externalCmd.Stderr = stderr
if e := externalCmd.Run(); e != nil {
err = e
}
}
return err
}
func (m *Manager) installDir() string {
return filepath.Join(m.dataDir(), "extensions")
}