Add tea issue edit (#506)

fixes #229
fixes #502

interactive mode will be in a follow up

Co-authored-by: Norwin <git@nroo.de>
Co-authored-by: 6543 <6543@obermui.de>
Reviewed-on: https://gitea.com/gitea/tea/pulls/506
Reviewed-by: 6543 <6543@obermui.de>
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Norwin <noerw@noreply.gitea.io>
Co-committed-by: Norwin <noerw@noreply.gitea.io>

cmd/issues/edit.go

@@ -0,0 +1,63 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package issues
+
+import (
+	"fmt"
+
+	"code.gitea.io/tea/cmd/flags"
+	"code.gitea.io/tea/modules/context"
+	"code.gitea.io/tea/modules/print"
+	"code.gitea.io/tea/modules/task"
+	"code.gitea.io/tea/modules/utils"
+
+	"github.com/urfave/cli/v2"
+)
+
+// CmdIssuesEdit is the subcommand of issues to edit issues
+var CmdIssuesEdit = cli.Command{
+	Name:    "edit",
+	Aliases: []string{"e"},
+	Usage:   "Edit one or more issues",
+	Description: `Edit one or more issues. To unset a property again,
+use an empty string (eg. --milestone "").`,
+	ArgsUsage: "<idx> [<idx>...]",
+	Action:    runIssuesEdit,
+	Flags:     flags.IssuePREditFlags,
+}
+
+func runIssuesEdit(cmd *cli.Context) error {
+	ctx := context.InitCommand(cmd)
+	ctx.Ensure(context.CtxRequirement{RemoteRepo: true})
+
+	if !cmd.Args().Present() {
+		return fmt.Errorf("must specify at least one issue index")
+	}
+
+	opts, err := flags.GetIssuePREditFlags(ctx)
+	if err != nil {
+		return err
+	}
+
+	indices, err := utils.ArgsToIndices(ctx.Args().Slice())
+	if err != nil {
+		return err
+	}
+
+	client := ctx.Login.Client()
+	for _, opts.Index = range indices {
+		issue, err := task.EditIssue(ctx, client, *opts)
+		if err != nil {
+			return err
+		}
+		if ctx.Args().Len() > 1 {
+			fmt.Println(issue.HTMLURL)
+		} else {
+			print.IssueDetails(issue, nil)
+		}
+	}
+
+	return nil
+}