Generate random password (go-gitea#5023)

* add random-password flag * run make fmt * add length cli flag rather than use a default value

Author: adelowo

cmd/admin.go

@@ -6,13 +6,15 @@
 package cmd
 
 import (
+"errors"
 "fmt"
 "os"
 "text/tabwriter"
 
 "code.gitea.io/git"
 "code.gitea.io/gitea/models"
 "code.gitea.io/gitea/modules/auth/oauth2"
+"code.gitea.io/gitea/modules/generate"
 "code.gitea.io/gitea/modules/log"
 "code.gitea.io/gitea/modules/setting"
 
@@ -59,10 +61,19 @@ var (
 Value: "custom/conf/app.ini",
 Usage: "Custom configuration file path",
 },
+cli.BoolFlag{
+Name: "random-password",
+Usage: "Generate a random password for the user",
+},
 cli.BoolFlag{
 Name: "must-change-password",
 Usage: "Force the user to change his/her password after initial login",
 },
+cli.IntFlag{
+Name: "random-password-length",
+Usage: "Length of the random password to be generated",
+Value: 12,
+},
 },
 }
 
@@ -277,10 +288,29 @@ func runChangePassword(c *cli.Context) error {
 }
 
 func runCreateUser(c *cli.Context) error {
-if err := argsSet(c, "name", "password", "email"); err != nil {
+if err := argsSet(c, "name", "email"); err != nil {
 return err
 }
 
+if c.IsSet("password") && c.IsSet("random-password") {
+return errors.New("cannot set both -random-password and -password flags")
+}
+
+var password string
+
+if c.IsSet("password") {
+password = c.String("password")
+} else if c.IsSet("random-password") {
+password, err := generate.GetRandomString(c.Int("random-password-length"))
+if err != nil {
+return err
+}
+
+fmt.Printf("generated random password is '%s'\n", password)
+} else {
+return errors.New("must set either password or random-password flag")
+}
+
 if c.IsSet("config") {
 setting.CustomConf = c.String("config")
 }
@@ -299,7 +329,7 @@ func runCreateUser(c *cli.Context) error {
 if err := models.CreateUser(&models.User{
 Name: c.String("name"),
 Email: c.String("email"),
-Passwd: c.String("password"),
+Passwd: password,
 IsActive: true,
 IsAdmin: c.Bool("admin"),
 MustChangePassword: changePassword,