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git_credential.go
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161 lines (135 loc) · 3.47 KB
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package shared
import (
"bytes"
"errors"
"fmt"
"path/filepath"
"strings"
"github.com/AlecAivazis/survey/v2"
"github.com/MakeNowJust/heredoc"
"github.com/cli/cli/v2/git"
"github.com/cli/cli/v2/internal/run"
"github.com/cli/cli/v2/pkg/prompt"
"github.com/google/shlex"
)
type GitCredentialFlow struct {
Executable string
shouldSetup bool
helper string
scopes []string
}
func (flow *GitCredentialFlow) Prompt(hostname string) error {
var gitErr error
flow.helper, gitErr = gitCredentialHelper(hostname)
if isOurCredentialHelper(flow.helper) {
flow.scopes = append(flow.scopes, "workflow")
return nil
}
err := prompt.SurveyAskOne(&survey.Confirm{
Message: "Authenticate Git with your GitHub credentials?",
Default: true,
}, &flow.shouldSetup)
if err != nil {
return fmt.Errorf("could not prompt: %w", err)
}
if flow.shouldSetup {
if isGitMissing(gitErr) {
return gitErr
}
flow.scopes = append(flow.scopes, "workflow")
}
return nil
}
func (flow *GitCredentialFlow) Scopes() []string {
return flow.scopes
}
func (flow *GitCredentialFlow) ShouldSetup() bool {
return flow.shouldSetup
}
func (flow *GitCredentialFlow) Setup(hostname, username, authToken string) error {
return flow.gitCredentialSetup(hostname, username, authToken)
}
func (flow *GitCredentialFlow) gitCredentialSetup(hostname, username, password string) error {
if flow.helper == "" {
// first use a blank value to indicate to git we want to sever the chain of credential helpers
preConfigureCmd, err := git.GitCommand("config", "--global", gitCredentialHelperKey(hostname), "")
if err != nil {
return err
}
if err = run.PrepareCmd(preConfigureCmd).Run(); err != nil {
return err
}
// use GitHub CLI as a credential helper (for this host only)
configureCmd, err := git.GitCommand(
"config", "--global", "--add",
gitCredentialHelperKey(hostname),
fmt.Sprintf("!%s auth git-credential", shellQuote(flow.Executable)),
)
if err != nil {
return err
}
return run.PrepareCmd(configureCmd).Run()
}
// clear previous cached credentials
rejectCmd, err := git.GitCommand("credential", "reject")
if err != nil {
return err
}
rejectCmd.Stdin = bytes.NewBufferString(heredoc.Docf(`
protocol=https
host=%s
`, hostname))
err = run.PrepareCmd(rejectCmd).Run()
if err != nil {
return err
}
approveCmd, err := git.GitCommand("credential", "approve")
if err != nil {
return err
}
approveCmd.Stdin = bytes.NewBufferString(heredoc.Docf(`
protocol=https
host=%s
username=%s
password=%s
`, hostname, username, password))
err = run.PrepareCmd(approveCmd).Run()
if err != nil {
return err
}
return nil
}
func gitCredentialHelperKey(hostname string) string {
return fmt.Sprintf("credential.https://%s.helper", hostname)
}
func gitCredentialHelper(hostname string) (helper string, err error) {
helper, err = git.Config(gitCredentialHelperKey(hostname))
if helper != "" {
return
}
helper, err = git.Config("credential.helper")
return
}
func isOurCredentialHelper(cmd string) bool {
if !strings.HasPrefix(cmd, "!") {
return false
}
args, err := shlex.Split(cmd[1:])
if err != nil || len(args) == 0 {
return false
}
return strings.TrimSuffix(filepath.Base(args[0]), ".exe") == "gh"
}
func isGitMissing(err error) bool {
if err == nil {
return false
}
var errNotInstalled *git.NotInstalled
return errors.As(err, &errNotInstalled)
}
func shellQuote(s string) string {
if strings.ContainsAny(s, " $") {
return "'" + s + "'"
}
return s
}