Fix handling of migration errors (#12928)

* Fix handling of migration errors

The migration type selection screen PR did not correctly handle errors
and any user input error on the migration page would simply redirect
back to the selection page. This meant that the error would simply be
lost and the user would be none the wiser as to what happened.

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

* make gen-swagger

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

modules/auth/repo_form.go

@@ -11,6 +11,7 @@ import (
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/routers/utils"
 
 	"gitea.com/macaron/binding"
@@ -58,7 +59,7 @@ func (f *CreateRepoForm) Validate(ctx *macaron.Context, errs binding.Errors) bin
 type MigrateRepoForm struct {
 	// required: true
 	CloneAddr    string                 `json:"clone_addr" binding:"Required"`
-	Service      int    `json:"service"`
+	Service      structs.GitServiceType `json:"service"`
 	AuthUsername string                 `json:"auth_username"`
 	AuthPassword string                 `json:"auth_password"`
 	AuthToken    string                 `json:"auth_token"`

routers/repo/migrate.go

@@ -94,9 +94,11 @@ func handleMigrateError(ctx *context.Context, owner *models.User, err error, nam
 func MigratePost(ctx *context.Context, form auth.MigrateRepoForm) {
 	ctx.Data["Title"] = ctx.Tr("new_migrate")
 	// Plain git should be first
-	ctx.Data["service"] = form.Service
+	ctx.Data["service"] = structs.GitServiceType(form.Service)
 	ctx.Data["Services"] = append([]structs.GitServiceType{structs.PlainGitService}, structs.SupportedFullGitService...)
 
+	tpl := base.TplName("repo/migrate/" + structs.GitServiceType(form.Service).Name())
+
 	ctxUser := checkContextUser(ctx, form.UID)
 	if ctx.Written() {
 		return
@@ -104,7 +106,7 @@ func MigratePost(ctx *context.Context, form auth.MigrateRepoForm) {
 	ctx.Data["ContextUser"] = ctxUser
 
 	if ctx.HasError() {
-		ctx.HTML(200, tplMigrate)
+		ctx.HTML(200, tpl)
 		return
 	}
 
@@ -115,11 +117,11 @@ func MigratePost(ctx *context.Context, form auth.MigrateRepoForm) {
 			addrErr := err.(models.ErrInvalidCloneAddr)
 			switch {
 			case addrErr.IsURLError:
-				ctx.RenderWithErr(ctx.Tr("form.url_error"), tplMigrate, &form)
+				ctx.RenderWithErr(ctx.Tr("form.url_error"), tpl, &form)
 			case addrErr.IsPermissionDenied:
-				ctx.RenderWithErr(ctx.Tr("repo.migrate.permission_denied"), tplMigrate, &form)
+				ctx.RenderWithErr(ctx.Tr("repo.migrate.permission_denied"), tpl, &form)
 			case addrErr.IsInvalidPath:
-				ctx.RenderWithErr(ctx.Tr("repo.migrate.invalid_local_path"), tplMigrate, &form)
+				ctx.RenderWithErr(ctx.Tr("repo.migrate.invalid_local_path"), tpl, &form)
 			default:
 				ctx.ServerError("Unknown error", err)
 			}
@@ -159,7 +161,7 @@ func MigratePost(ctx *context.Context, form auth.MigrateRepoForm) {
 
 	err = models.CheckCreateRepository(ctx.User, ctxUser, opts.RepoName)
 	if err != nil {
-		handleMigrateError(ctx, ctxUser, err, "MigratePost", tplMigrate, &form)
+		handleMigrateError(ctx, ctxUser, err, "MigratePost", tpl, &form)
 		return
 	}
 
@@ -169,5 +171,5 @@ func MigratePost(ctx *context.Context, form auth.MigrateRepoForm) {
 		return
 	}
 
-	handleMigrateError(ctx, ctxUser, err, "MigratePost", tplMigrate, &form)
+	handleMigrateError(ctx, ctxUser, err, "MigratePost", tpl, &form)
 }

templates/swagger/v1_json.tmpl

@@ -13231,6 +13231,12 @@
       },
       "x-go-package": "code.gitea.io/gitea/modules/structs"
     },
+    "GitServiceType": {
+      "description": "GitServiceType represents a git service",
+      "type": "integer",
+      "format": "int64",
+      "x-go-package": "code.gitea.io/gitea/modules/structs"
+    },
     "GitTreeResponse": {
       "description": "GitTreeResponse returns a git tree",
       "type": "object",
@@ -13658,9 +13664,7 @@
           "x-go-name": "RepoName"
         },
         "service": {
-          "type": "integer",
-          "format": "int64",
-          "x-go-name": "Service"
+          "$ref": "#/definitions/GitServiceType"
         },
         "uid": {
           "type": "integer",