feat: fill MR desc with all commit bodies

adds --fill-commit-body flag to add all the commit bodies to the MR description
when creating an my with --fill

closes #795

commands/mr/create/mr_create.go

@@ -40,14 +40,15 @@ type CreateOpts struct {
 	RemoveSourceBranch bool
 	AllowCollaboration bool
 
-	Autofill      bool
-	IsDraft       bool
-	IsWIP         bool
-	ShouldPush    bool
-	NoEditor      bool
-	IsInteractive bool
-	Yes           bool
-	Web           bool
+	Autofill       bool
+	FillCommitBody bool
+	IsDraft        bool
+	IsWIP          bool
+	ShouldPush     bool
+	NoEditor       bool
+	IsInteractive  bool
+	Yes            bool
+	Web            bool
 
 	IO       *iostreams.IOStreams
 	Branch   func() (string, error)
@@ -84,6 +85,7 @@ func NewCmdCreate(f *cmdutils.Factory, runE func(opts *CreateOpts) error) *cobra
 			$ glab mr create -a username -t "fix annoying bug"
 			$ glab mr create -f --draft --label RFC
 			$ glab mr create --fill --yes --web
+			$ glab mr create --fill --fill-commit-body --yes
 		`),
 		Args: cobra.ExactArgs(0),
 		PreRun: func(cmd *cobra.Command, args []string) {
@@ -121,6 +123,9 @@ func NewCmdCreate(f *cmdutils.Factory, runE func(opts *CreateOpts) error) *cobra
 			if cmd.Flags().Changed("wip") && cmd.Flags().Changed("draft") {
 				return &cmdutils.FlagError{Err: errors.New("specify either of --draft or --wip")}
 			}
+			if !opts.Autofill && opts.FillCommitBody {
+				return &cmdutils.FlagError{Err: errors.New("--fill required for --fill-commit-body")}
+			}
 			// Remove this once --yes does more than just skip the prompts that --web happen to skip
 			// by design
 			if opts.Yes && opts.Web {
@@ -135,6 +140,7 @@ func NewCmdCreate(f *cmdutils.Factory, runE func(opts *CreateOpts) error) *cobra
 		},
 	}
 	mrCreateCmd.Flags().BoolVarP(&opts.Autofill, "fill", "f", false, "Do not prompt for title/description and just use commit info")
+	mrCreateCmd.Flags().BoolVarP(&opts.FillCommitBody, "fill-commit-body", "", false, "Fill description with each commit body when multiple commits")
 	mrCreateCmd.Flags().BoolVarP(&opts.IsDraft, "draft", "", false, "Mark merge request as a draft")
 	mrCreateCmd.Flags().BoolVarP(&opts.IsWIP, "wip", "", false, "Mark merge request as a work in progress. Alternative to --draft")
 	mrCreateCmd.Flags().BoolVarP(&opts.ShouldPush, "push", "", false, "Push committed changes after creating merge request. Make sure you have committed changes")
@@ -501,7 +507,16 @@ func mrBodyAndTitle(opts *CreateOpts) error {
 		if opts.Description == "" {
 			var body strings.Builder
 			for i := len(commits) - 1; i >= 0; i-- {
-				fmt.Fprintf(&body, "- %s\n", commits[i].Title)
+				// adds 2 spaces for markdown line wrapping
+				fmt.Fprintf(&body, "- %s  \n", commits[i].Title)
+
+				if opts.FillCommitBody {
+					commitBody, err := git.CommitBody(commits[i].Sha)
+					if err != nil {
+						return err
+					}
+					fmt.Fprintf(&body, "%s\n", commitBody)
+				}
 			}
 			opts.Description = body.String()
 		}

commands/mr/create/mr_create_test.go

@@ -276,6 +276,40 @@ resolves #1
 like this
 
 resolves #1
+`, opts.Description)
+	})
+	t.Run("given-fill-commit-body", func(t *testing.T) {
+		opts = &CreateOpts{
+			SourceBranch:         "mr-autofill-test-br",
+			TargetBranch:         "master",
+			TargetTrackingBranch: "origin/master",
+		}
+		cs, csTeardown := test.InitCmdStubber()
+		defer csTeardown()
+
+		cs.Stub("d1sd2e,chore: some tidying\nd2asa3,docs: more changes to more things")
+		cs.Stub("Here, I am adding some commit body.\nLittle longer\n\nResolves #1\n")
+		cs.Stub("another body for another commit\ncloses 1234\n")
+
+		opts := *opts
+		opts.FillCommitBody = true
+
+		if err := mrBodyAndTitle(&opts); err != nil {
+			t.Errorf("unexpected error: %v", err)
+			return
+		}
+
+		assert.Equal(t, "mr autofill test br", opts.Title)
+		assert.Equal(t, `- docs: more changes to more things  
+Here, I am adding some commit body.
+Little longer
+
+Resolves #1
+
+- chore: some tidying  
+another body for another commit
+closes 1234
+
 `, opts.Description)
 	})
 }