From 69b64507ea6fddf09ddd4d3ec76a90b3a221d31a Mon Sep 17 00:00:00 2001
From: Cristian Dominguez <cristiand391@users.noreply.github.com>
Date: Fri, 23 Oct 2020 18:45:20 -0300
Subject: [PATCH] Add support for git flags in gh repo fork

---
 pkg/cmd/repo/fork/fork.go      | 19 +++++++++++++++----
 pkg/cmd/repo/fork/fork_test.go |  7 +++++++
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/pkg/cmd/repo/fork/fork.go b/pkg/cmd/repo/fork/fork.go
index b22e2501c..d24bd486a 100644
--- a/pkg/cmd/repo/fork/fork.go
+++ b/pkg/cmd/repo/fork/fork.go
@@ -18,6 +18,7 @@ import (
 	"github.com/cli/cli/pkg/prompt"
 	"github.com/cli/cli/utils"
 	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
 )
 
 type ForkOptions struct {
@@ -27,6 +28,7 @@ type ForkOptions struct {
 	BaseRepo   func() (ghrepo.Interface, error)
 	Remotes    func() (context.Remotes, error)
 
+	GitArgs      []string
 	Repository   string
 	Clone        bool
 	Remote       bool
@@ -48,16 +50,19 @@ func NewCmdFork(f *cmdutil.Factory, runF func(*ForkOptions) error) *cobra.Comman
 	}
 
 	cmd := &cobra.Command{
-		Use:   "fork [<repository>]",
-		Args:  cobra.MaximumNArgs(1),
+		Use:   "fork [<repository>] [-- <gitflags>...]",
+		Args:  cobra.MaximumNArgs(2),
 		Short: "Create a fork of a repository",
 		Long: `Create a fork of a repository.
 
-With no argument, creates a fork of the current repository. Otherwise, forks the specified repository.`,
+With no argument, creates a fork of the current repository. Otherwise, forks the specified repository.
+
+If '--clone' is specified, you can pass aditional 'git clone' flags by listing them after '--'.`,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			promptOk := opts.IO.CanPrompt()
 			if len(args) > 0 {
 				opts.Repository = args[0]
+				opts.GitArgs = args[1:]
 			}
 
 			if promptOk && !cmd.Flags().Changed("clone") {
@@ -74,6 +79,12 @@ With no argument, creates a fork of the current repository. Otherwise, forks the
 			return forkRun(opts)
 		},
 	}
+	cmd.SetFlagErrorFunc(func(cmd *cobra.Command, err error) error {
+		if err == pflag.ErrHelp {
+			return err
+		}
+		return &cmdutil.FlagError{Err: fmt.Errorf("%w\nSeparate git clone flags with '--'.", err)}
+	})
 
 	cmd.Flags().BoolVar(&opts.Clone, "clone", false, "Clone the fork {true|false}")
 	cmd.Flags().BoolVar(&opts.Remote, "remote", false, "Add remote for fork {true|false}")
@@ -248,7 +259,7 @@ func forkRun(opts *ForkOptions) error {
 		}
 		if cloneDesired {
 			forkedRepoURL := ghrepo.FormatRemoteURL(forkedRepo, protocol)
-			cloneDir, err := git.RunClone(forkedRepoURL, []string{})
+			cloneDir, err := git.RunClone(forkedRepoURL, opts.GitArgs)
 			if err != nil {
 				return fmt.Errorf("failed to clone fork: %w", err)
 			}
diff --git a/pkg/cmd/repo/fork/fork_test.go b/pkg/cmd/repo/fork/fork_test.go
index 0a92b77e5..baf6cb995 100644
--- a/pkg/cmd/repo/fork/fork_test.go
+++ b/pkg/cmd/repo/fork/fork_test.go
@@ -465,6 +465,13 @@ func TestRepoFork_in_parent_survey_no(t *testing.T) {
 	reg.Verify(t)
 }
 
+func Test_RepoFork_flagError(t *testing.T) {
+	_, err := runCommand(nil, nil, true, "--depth 1 OWNER/REPO")
+	if err == nil || err.Error() != "unknown flag: --depth\nSeparate git clone flags with '--'." {
+		t.Errorf("unexpected error %v", err)
+	}
+}
+
 func stubSpinner() {
 	// not bothering with teardown since we never want spinners when doing tests
 	utils.StartSpinner = func(_ *spinner.Spinner) {