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|
package shared
import (
"bytes"
"context"
"errors"
"fmt"
"path/filepath"
"strings"
"github.com/MakeNowJust/heredoc"
"github.com/cli/cli/v2/git"
"github.com/cli/cli/v2/internal/ghinstance"
"github.com/google/shlex"
)
type GitCredentialFlow struct {
Executable string
Prompter Prompt
GitClient *git.Client
shouldSetup bool
helper string
scopes []string
}
func (flow *GitCredentialFlow) Prompt(hostname string) error {
var gitErr error
flow.helper, gitErr = gitCredentialHelper(flow.GitClient, hostname)
if isOurCredentialHelper(flow.helper) {
flow.scopes = append(flow.scopes, "workflow")
return nil
}
result, err := flow.Prompter.Confirm("Authenticate Git with your GitHub credentials?", true)
if err != nil {
return err
}
flow.shouldSetup = result
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 {
gitClient := flow.GitClient
ctx := context.Background()
if flow.helper == "" {
credHelperKeys := []string{
gitCredentialHelperKey(hostname),
}
gistHost := strings.TrimSuffix(ghinstance.GistHost(hostname), "/")
if strings.HasPrefix(gistHost, "gist.") {
credHelperKeys = append(credHelperKeys, gitCredentialHelperKey(gistHost))
}
var configErr error
for _, credHelperKey := range credHelperKeys {
if configErr != nil {
break
}
// first use a blank value to indicate to git we want to sever the chain of credential helpers
preConfigureCmd, err := gitClient.Command(ctx, "config", "--global", "--replace-all", credHelperKey, "")
if err != nil {
configErr = err
break
}
if _, err = preConfigureCmd.Output(); err != nil {
configErr = err
break
}
// second configure the actual helper for this host
configureCmd, err := gitClient.Command(ctx,
"config", "--global", "--add",
credHelperKey,
fmt.Sprintf("!%s auth git-credential", shellQuote(flow.Executable)),
)
if err != nil {
configErr = err
} else {
_, configErr = configureCmd.Output()
}
}
return configErr
}
// clear previous cached credentials
rejectCmd, err := gitClient.Command(ctx, "credential", "reject")
if err != nil {
return err
}
rejectCmd.Stdin = bytes.NewBufferString(heredoc.Docf(`
protocol=https
host=%s
`, hostname))
_, err = rejectCmd.Output()
if err != nil {
return err
}
approveCmd, err := gitClient.Command(ctx, "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 = approveCmd.Output()
if err != nil {
return err
}
return nil
}
func gitCredentialHelperKey(hostname string) string {
host := strings.TrimSuffix(ghinstance.HostPrefix(hostname), "/")
return fmt.Sprintf("credential.%s.helper", host)
}
func gitCredentialHelper(gitClient *git.Client, hostname string) (helper string, err error) {
ctx := context.Background()
helper, err = gitClient.Config(ctx, gitCredentialHelperKey(hostname))
if helper != "" {
return
}
helper, err = gitClient.Config(ctx, "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
}
|
