Add git helper (#612)

Add support to tea login with helper same another tools and `gh`

Reviewed-on: https://gitea.com/gitea/tea/pulls/612
Reviewed-by: 6543 <6543@obermui.de>
Co-authored-by: Matheus Sampaio Queiroga <srherobrine20@gmail.com>
Co-committed-by: Matheus Sampaio Queiroga <srherobrine20@gmail.com>

cmd/login.go

@@ -28,6 +28,7 @@ var CmdLogin = cli.Command{
 		&login.CmdLoginEdit,
 		&login.CmdLoginDelete,
 		&login.CmdLoginSetDefault,
+		&login.CmdLoginHelper,
 	},
 }
 

cmd/login/add.go

@@ -84,6 +84,11 @@ var CmdLoginAdd = cli.Command{
 			Aliases: []string{"a"},
 			Usage:   "Use SSH public key or SSH fingerprint to login (needs a running ssh-agent with ssh key loaded)",
 		},
+		&cli.BoolFlag{
+			Name:    "helper",
+			Aliases: []string{"j"},
+			Usage:   "Add helper",
+		},
 	},
 	Action: runLoginAdd,
 }
@@ -113,5 +118,7 @@ func runLoginAdd(ctx *cli.Context) error {
 		ctx.String("ssh-agent-key"),
 		ctx.Bool("insecure"),
 		sshAgent,
-		!ctx.Bool("no-version-check"))
+		!ctx.Bool("no-version-check"),
+		ctx.Bool("helper"),
+	)
 }

cmd/login/helper.go

@@ -0,0 +1,112 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package login
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"net/url"
+	"os"
+	"strings"
+
+	"code.gitea.io/tea/modules/config"
+	"code.gitea.io/tea/modules/task"
+	"github.com/urfave/cli/v2"
+)
+
+// CmdLoginHelper represents to login a gitea helper.
+var CmdLoginHelper = cli.Command{
+	Name:        "helper",
+	Aliases:     []string{"git-credential"},
+	Usage:       "Git helper",
+	Description: `Git helper`,
+	Hidden:      true,
+	Subcommands: []*cli.Command{
+		{
+			Name:        "store",
+			Description: "Command drops",
+			Aliases:     []string{"erase"},
+			Action: func(ctx *cli.Context) error {
+				return nil
+			},
+		},
+		{
+			Name:        "setup",
+			Description: "Setup helper to tea authenticate",
+			Action: func(ctx *cli.Context) error {
+				logins, err := config.GetLogins()
+				if err != nil {
+					return err
+				}
+				for _, login := range logins {
+					added, err := task.SetupHelper(login)
+					if err != nil {
+						return err
+					} else if added {
+						fmt.Printf("Added \"%s\"\n", login.Name)
+					} else {
+						fmt.Printf("\"%s\" has already been added!\n", login.Name)
+					}
+				}
+				return nil
+			},
+		},
+		{
+			Name:        "get",
+			Description: "Get token to auth",
+			Action: func(cmd *cli.Context) error {
+				wants := map[string]string{}
+				s := bufio.NewScanner(os.Stdin)
+				for s.Scan() {
+					line := s.Text()
+					if line == "" {
+						break
+					}
+					parts := strings.SplitN(line, "=", 2)
+					if len(parts) < 2 {
+						continue
+					}
+					key, value := parts[0], parts[1]
+					if key == "url" {
+						u, err := url.Parse(value)
+						if err != nil {
+							return err
+						}
+						wants["protocol"] = u.Scheme
+						wants["host"] = u.Host
+						wants["path"] = u.Path
+						wants["username"] = u.User.Username()
+						wants["password"], _ = u.User.Password()
+					} else {
+						wants[key] = value
+					}
+				}
+
+				if len(wants["host"]) == 0 {
+					log.Fatal("Require hostname")
+				} else if len(wants["protocol"]) == 0 {
+					wants["protocol"] = "http"
+				}
+
+				userConfig := config.GetLoginByHost(wants["host"])
+				if len(userConfig.Token) == 0 {
+					log.Fatal("User no set")
+				}
+
+				host, err := url.Parse(userConfig.URL)
+				if err != nil {
+					return err
+				}
+
+				_, err = fmt.Fprintf(os.Stdout, "protocol=%s\nhost=%s\nusername=%s\npassword=%s\n", host.Scheme, host.Host, userConfig.User, userConfig.Token)
+				if err != nil {
+					return err
+				}
+
+				return nil
+			},
+		},
+	},
+}