[F3] Forgejo driver and CLI

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Signed-off-by: Earl Warren <contact@earl-warren.org>

Preserve file size when creating attachments

Introduced in c6f5029708

repoList.LoadAttributes has a ctx argument now

Rename `repo.GetOwner` to `repo.LoadOwner`

bd66fa586a

upgrade to the latest gof3

(cherry picked from commit c770713656)

[F3] ID remapping logic is in place, remove workaround

(cherry picked from commit d0fee30167)

[F3] it is experimental, do not enable by default

(cherry picked from commit de325b21d0)
(cherry picked from commit 547e7b3c40)
(cherry picked from commit 820df3a56b)
(cherry picked from commit eaba87689b)
(cherry picked from commit 1b86896b3b)
(cherry picked from commit 0046aac1c6)
(cherry picked from commit f14220df8f)
(cherry picked from commit 559b731001)
(cherry picked from commit 801f7d600d)
(cherry picked from commit 6aa76e9bcf)
(cherry picked from commit a8757dcb07)

[F3] promote F3 users to matching OAuth2 users on first sign-in

(cherry picked from commit bd7fef7496)
(cherry picked from commit 07412698e8)
(cherry picked from commit d143e5b2a3)

[F3] upgrade to gof3 50a6e740ac04

Add new methods GetIDString() & SetIDString() & ToFormatInterface()
Change the prototype of the fixture function

(cherry picked from commit d7b263ff8b)
(cherry picked from commit b3eaf2249d)
(cherry picked from commit d492ddd9bb)

[F3] add GetLocalMatchingRemote with a default implementation

(cherry picked from commit 0a22015039)
(cherry picked from commit f1310c38fb)
(cherry picked from commit deb68552f2)

[F3] GetLocalMatchingRemote for user

(cherry picked from commit e73cb837f5)
(cherry picked from commit a24bc0b85e)
(cherry picked from commit 846a522ecc)

[F3] GetAdminUser now has a ctx argument

(cherry picked from commit 37357a92af)
(cherry picked from commit 660bc1673c)
(cherry picked from commit 72d692a767)

[F3] introduce UserTypeF3

To avoid conflicts should UserTypeRemoteUser be used differently by Gitea

(cherry picked from commit 6de2701bb3)

[F3] user.Put: idempotency

(cherry picked from commit 821e38573c)

cmd/f3.go

@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: MIT
+
+package cmd
+
+import (
+	"context"
+	"fmt"
+
+	auth_model "code.gitea.io/gitea/models/auth"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/services/f3/util"
+
+	"github.com/urfave/cli"
+	"lab.forgefriends.org/friendlyforgeformat/gof3"
+	f3_common "lab.forgefriends.org/friendlyforgeformat/gof3/forges/common"
+	f3_format "lab.forgefriends.org/friendlyforgeformat/gof3/format"
+)
+
+var CmdF3 = cli.Command{
+	Name:        "f3",
+	Usage:       "Friendly Forge Format (F3) format export/import.",
+	Description: "Import or export a repository from or to the Friendly Forge Format (F3) format.",
+	Action:      runF3,
+	Flags: []cli.Flag{
+		cli.StringFlag{
+			Name:  "directory",
+			Value: "./f3",
+			Usage: "Path of the directory where the F3 dump is stored",
+		},
+		cli.StringFlag{
+			Name:  "user",
+			Value: "",
+			Usage: "The name of the user who owns the repository",
+		},
+		cli.StringFlag{
+			Name:  "repository",
+			Value: "",
+			Usage: "The name of the repository",
+		},
+		cli.StringFlag{
+			Name:  "authentication-source",
+			Value: "",
+			Usage: "The name of the authentication source matching the forge of origin",
+		},
+		cli.BoolFlag{
+			Name:  "no-pull-request",
+			Usage: "Do not dump pull requests",
+		},
+		cli.BoolFlag{
+			Name:  "import",
+			Usage: "Import from the directory",
+		},
+		cli.BoolFlag{
+			Name:  "export",
+			Usage: "Export to the directory",
+		},
+	},
+}
+
+func runF3(ctx *cli.Context) error {
+	stdCtx, cancel := installSignals()
+	defer cancel()
+
+	if err := initDB(stdCtx); err != nil {
+		return err
+	}
+
+	if err := git.InitSimple(stdCtx); err != nil {
+		return err
+	}
+
+	return RunF3(stdCtx, ctx)
+}
+
+func getAuthenticationSource(ctx context.Context, authenticationSource string) (*auth_model.Source, error) {
+	source, err := auth_model.GetSourceByName(ctx, authenticationSource)
+	if err != nil {
+		if auth_model.IsErrSourceNotExist(err) {
+			return nil, nil
+		}
+		return nil, err
+	}
+	return source, nil
+}
+
+func RunF3(stdCtx context.Context, ctx *cli.Context) error {
+	doer, err := user_model.GetAdminUser(stdCtx)
+	if err != nil {
+		return err
+	}
+
+	features := gof3.AllFeatures
+	if ctx.Bool("no-pull-request") {
+		features.PullRequests = false
+	}
+
+	var sourceID int64
+	sourceName := ctx.String("authentication-source")
+	source, err := getAuthenticationSource(stdCtx, sourceName)
+	if err != nil {
+		return fmt.Errorf("error retrieving the authentication-source %s %v", sourceName, err)
+	}
+	if source != nil {
+		sourceID = source.ID
+	}
+
+	forgejo := util.ForgejoForgeRoot(features, doer, sourceID)
+	f3 := util.F3ForgeRoot(features, ctx.String("directory"))
+
+	if ctx.Bool("export") {
+		forgejo.Forge.Users.List(stdCtx)
+		user := forgejo.Forge.Users.GetFromFormat(stdCtx, &f3_format.User{UserName: ctx.String("user")})
+		if user.IsNil() {
+			return fmt.Errorf("%s is not a known user", ctx.String("user"))
+		}
+
+		user.Projects.List(stdCtx)
+		project := user.Projects.GetFromFormat(stdCtx, &f3_format.Project{Name: ctx.String("repository")})
+		if project.IsNil() {
+			return fmt.Errorf("%s/%s is not a known repository", ctx.String("user"), ctx.String("repository"))
+		}
+
+		options := f3_common.NewMirrorOptionsRecurse(user, project)
+		f3.Forge.Mirror(stdCtx, forgejo.Forge, options)
+		fmt.Println("exported")
+	} else if ctx.Bool("import") {
+		options := f3_common.NewMirrorOptionsRecurse()
+		forgejo.Forge.Mirror(stdCtx, f3.Forge, options)
+		fmt.Println("imported")
+	} else {
+		return fmt.Errorf("either --import or --export must be specified")
+	}
+
+	return nil
+}