245 lines
7.3 KiB
Go
245 lines
7.3 KiB
Go
package checkout
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import (
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"fmt"
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"net/http"
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"os"
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"os/exec"
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"strings"
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"github.com/cli/cli/api"
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"github.com/cli/cli/context"
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"github.com/cli/cli/git"
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"github.com/cli/cli/internal/config"
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"github.com/cli/cli/internal/ghrepo"
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"github.com/cli/cli/internal/run"
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"github.com/cli/cli/pkg/cmd/pr/shared"
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"github.com/cli/cli/pkg/cmdutil"
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"github.com/cli/cli/pkg/iostreams"
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"github.com/cli/safeexec"
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"github.com/spf13/cobra"
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)
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type CheckoutOptions struct {
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HttpClient func() (*http.Client, error)
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Config func() (config.Config, error)
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IO *iostreams.IOStreams
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BaseRepo func() (ghrepo.Interface, error)
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Remotes func() (context.Remotes, error)
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Branch func() (string, error)
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SelectorArg string
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RecurseSubmodules bool
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Force bool
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Detach bool
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}
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func NewCmdCheckout(f *cmdutil.Factory, runF func(*CheckoutOptions) error) *cobra.Command {
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opts := &CheckoutOptions{
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IO: f.IOStreams,
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HttpClient: f.HttpClient,
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Config: f.Config,
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Remotes: f.Remotes,
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Branch: f.Branch,
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}
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cmd := &cobra.Command{
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Use: "checkout {<number> | <url> | <branch>}",
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Short: "Check out a pull request in git",
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Args: cmdutil.MinimumArgs(1, "argument required"),
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RunE: func(cmd *cobra.Command, args []string) error {
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// support `-R, --repo` override
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opts.BaseRepo = f.BaseRepo
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if len(args) > 0 {
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opts.SelectorArg = args[0]
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}
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if runF != nil {
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return runF(opts)
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}
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return checkoutRun(opts)
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},
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}
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cmd.Flags().BoolVarP(&opts.RecurseSubmodules, "recurse-submodules", "", false, "Update all submodules after checkout")
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cmd.Flags().BoolVarP(&opts.Force, "force", "f", false, "Reset the existing local branch to the latest state of the pull request")
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cmd.Flags().BoolVarP(&opts.Detach, "detach", "", false, "Checkout PR with a detached HEAD")
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return cmd
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}
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func checkoutRun(opts *CheckoutOptions) error {
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remotes, err := opts.Remotes()
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if err != nil {
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return err
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}
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httpClient, err := opts.HttpClient()
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if err != nil {
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return err
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}
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apiClient := api.NewClientFromHTTP(httpClient)
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pr, baseRepo, err := shared.PRFromArgs(apiClient, opts.BaseRepo, opts.Branch, opts.Remotes, opts.SelectorArg)
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if err != nil {
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return err
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}
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cfg, err := opts.Config()
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if err != nil {
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return err
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}
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protocol, _ := cfg.Get(baseRepo.RepoHost(), "git_protocol")
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baseRemote, _ := remotes.FindByRepo(baseRepo.RepoOwner(), baseRepo.RepoName())
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baseURLOrName := ghrepo.FormatRemoteURL(baseRepo, protocol)
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if baseRemote != nil {
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baseURLOrName = baseRemote.Name
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}
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headRemote := baseRemote
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if pr.IsCrossRepository {
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headRemote, _ = remotes.FindByRepo(pr.HeadRepositoryOwner.Login, pr.HeadRepository.Name)
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}
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if strings.HasPrefix(pr.HeadRefName, "-") {
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return fmt.Errorf("invalid branch name: %q", pr.HeadRefName)
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}
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var cmdQueue [][]string
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if headRemote != nil {
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cmdQueue = append(cmdQueue, cmdsForExistingRemote(headRemote, pr, opts)...)
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} else {
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defaultBranch, err := api.RepoDefaultBranch(apiClient, baseRepo)
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if err != nil {
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return err
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}
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cmdQueue = append(cmdQueue, cmdsForMissingRemote(pr, baseURLOrName, baseRepo.RepoHost(), defaultBranch, protocol, opts)...)
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}
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if opts.RecurseSubmodules {
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cmdQueue = append(cmdQueue, []string{"git", "submodule", "sync", "--recursive"})
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cmdQueue = append(cmdQueue, []string{"git", "submodule", "update", "--init", "--recursive"})
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}
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err = executeCmds(cmdQueue)
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if err != nil {
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return err
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}
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return nil
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}
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func cmdsForExistingRemote(remote *context.Remote, pr *api.PullRequest, opts *CheckoutOptions) [][]string {
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var cmds [][]string
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remoteBranch := fmt.Sprintf("%s/%s", remote.Name, pr.HeadRefName)
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refSpec := fmt.Sprintf("+refs/heads/%s", pr.HeadRefName)
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if !opts.Detach {
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refSpec += fmt.Sprintf(":refs/remotes/%s", remoteBranch)
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}
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cmds = append(cmds, []string{"git", "fetch", remote.Name, refSpec})
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switch {
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case opts.Detach:
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cmds = append(cmds, []string{"git", "checkout", "--detach", "FETCH_HEAD"})
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case localBranchExists(pr.HeadRefName):
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cmds = append(cmds, []string{"git", "checkout", pr.HeadRefName})
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if opts.Force {
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cmds = append(cmds, []string{"git", "reset", "--hard", fmt.Sprintf("refs/remotes/%s", remoteBranch)})
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} else {
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// TODO: check if non-fast-forward and suggest to use `--force`
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cmds = append(cmds, []string{"git", "merge", "--ff-only", fmt.Sprintf("refs/remotes/%s", remoteBranch)})
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}
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default:
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cmds = append(cmds, []string{"git", "checkout", "-b", pr.HeadRefName, "--no-track", remoteBranch})
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cmds = append(cmds, []string{"git", "config", fmt.Sprintf("branch.%s.remote", pr.HeadRefName), remote.Name})
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cmds = append(cmds, []string{"git", "config", fmt.Sprintf("branch.%s.merge", pr.HeadRefName), "refs/heads/" + pr.HeadRefName})
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}
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return cmds
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}
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func cmdsForMissingRemote(pr *api.PullRequest, baseURLOrName, repoHost, defaultBranch, protocol string, opts *CheckoutOptions) [][]string {
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var cmds [][]string
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newBranchName := pr.HeadRefName
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// avoid naming the new branch the same as the default branch
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if newBranchName == defaultBranch {
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newBranchName = fmt.Sprintf("%s/%s", pr.HeadRepositoryOwner.Login, newBranchName)
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}
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ref := fmt.Sprintf("refs/pull/%d/head", pr.Number)
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if opts.Detach {
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cmds = append(cmds, []string{"git", "fetch", baseURLOrName, ref})
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cmds = append(cmds, []string{"git", "checkout", "--detach", "FETCH_HEAD"})
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return cmds
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}
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currentBranch, _ := opts.Branch()
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if newBranchName == currentBranch {
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// PR head matches currently checked out branch
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cmds = append(cmds, []string{"git", "fetch", baseURLOrName, ref})
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if opts.Force {
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cmds = append(cmds, []string{"git", "reset", "--hard", "FETCH_HEAD"})
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} else {
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// TODO: check if non-fast-forward and suggest to use `--force`
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cmds = append(cmds, []string{"git", "merge", "--ff-only", "FETCH_HEAD"})
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}
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} else {
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// create a new branch
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if opts.Force {
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cmds = append(cmds, []string{"git", "fetch", baseURLOrName, fmt.Sprintf("%s:%s", ref, newBranchName), "--force"})
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} else {
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// TODO: check if non-fast-forward and suggest to use `--force`
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cmds = append(cmds, []string{"git", "fetch", baseURLOrName, fmt.Sprintf("%s:%s", ref, newBranchName)})
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}
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cmds = append(cmds, []string{"git", "checkout", newBranchName})
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}
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remote := baseURLOrName
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mergeRef := ref
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if pr.MaintainerCanModify {
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headRepo := ghrepo.NewWithHost(pr.HeadRepositoryOwner.Login, pr.HeadRepository.Name, repoHost)
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remote = ghrepo.FormatRemoteURL(headRepo, protocol)
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mergeRef = fmt.Sprintf("refs/heads/%s", pr.HeadRefName)
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}
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if missingMergeConfigForBranch(newBranchName) {
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cmds = append(cmds, []string{"git", "config", fmt.Sprintf("branch.%s.remote", newBranchName), remote})
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cmds = append(cmds, []string{"git", "config", fmt.Sprintf("branch.%s.merge", newBranchName), mergeRef})
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}
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return cmds
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}
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func missingMergeConfigForBranch(b string) bool {
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mc, err := git.Config(fmt.Sprintf("branch.%s.merge", b))
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return err != nil || mc == ""
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}
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func localBranchExists(b string) bool {
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_, err := git.ShowRefs("refs/heads/" + b)
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return err == nil
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}
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func executeCmds(cmdQueue [][]string) error {
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for _, args := range cmdQueue {
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// TODO: reuse the result of this lookup across loop iteration
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exe, err := safeexec.LookPath(args[0])
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if err != nil {
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return err
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}
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cmd := exec.Command(exe, args[1:]...)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := run.PrepareCmd(cmd).Run(); err != nil {
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return err
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}
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}
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return nil
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}
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