Add command to bulk set must-change-password (#22823)

As part of administration sometimes it is appropriate to forcibly tell
users to update their passwords.

This PR creates a new command `gitea admin user must-change-password`
which will set the `MustChangePassword` flag on the provided users.

Signed-off-by: Andrew Thornton <art27@cantab.net>

cmd/admin_user_must_change_password.go

@@ -0,0 +1,58 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package cmd
+
+import (
+	"errors"
+	"fmt"
+
+	user_model "code.gitea.io/gitea/models/user"
+
+	"github.com/urfave/cli"
+)
+
+var microcmdUserMustChangePassword = cli.Command{
+	Name:   "must-change-password",
+	Usage:  "Set the must change password flag for the provided users or all users",
+	Action: runMustChangePassword,
+	Flags: []cli.Flag{
+		cli.BoolFlag{
+			Name:  "all,A",
+			Usage: "All users must change password, except those explicitly excluded with --exclude",
+		},
+		cli.StringSliceFlag{
+			Name:  "exclude,e",
+			Usage: "Do not change the must-change-password flag for these users",
+		},
+		cli.BoolFlag{
+			Name:  "unset",
+			Usage: "Instead of setting the must-change-password flag, unset it",
+		},
+	},
+}
+
+func runMustChangePassword(c *cli.Context) error {
+	ctx, cancel := installSignals()
+	defer cancel()
+
+	if c.NArg() == 0 && !c.IsSet("all") {
+		return errors.New("either usernames or --all must be provided")
+	}
+
+	mustChangePassword := !c.Bool("unset")
+	all := c.Bool("all")
+	exclude := c.StringSlice("exclude")
+
+	if err := initDB(ctx); err != nil {
+		return err
+	}
+
+	n, err := user_model.SetMustChangePassword(ctx, all, mustChangePassword, c.Args(), exclude)
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("Updated %d users setting MustChangePassword to %t\n", n, mustChangePassword)
+	return nil
+}