Add support for migrating from Gitlab (#9084)

* First stab at a Gitlab migrations interface.

* Modify JS to show migration for Gitlab

* Properly strip out #gitlab tag from repo name

* Working Gitlab migrations!
Still need to figure out how to hide tokens/etc from showing up in opts.CloneAddr

* Try #2 at trying to hide credentials.
CloneAddr was being used as OriginalURL.
Now passing OriginalURL through from the form and saving it.

* Add go-gitlab dependency

* Vendor go-gitlab

* Use gitlab.BasicAuthClient
Correct CloneURL.
This should be functioning!
Previous commits fixed "Migrated from"
from including the migration credentials.

* Replaced repoPath with repoID globally.
RepoID is grabbed in NewGitlabDownloader

* Logging touchup

* Properly set private repo status.
Properly set milestone deadline time.
Consistently use Gitlab username for 'Name'.

* Add go-gitlab vendor cache

* Fix PR migrations:
- Count of issues is kept to set a non-conflicting PR.ID
- Bool is used to tell whether to fetch Issue or PR comments

* Ensure merged PRs are closed and set with the proper time

* Remove copyright and some commented code

* Rip out '#gitlab' based self-hosted Gitlab support

* Hide given credentials for migrated repos.

CloneAddr was being saved as OriginalURL.

Now passing OriginalURL through from the form and
saving it in it's place

* Use asset.URL directly, no point in parsing.
Opened PRs should fall through to false.

* Fix importing Milestones.
Allow importing using Personal Tokens or anonymous access.

* Fix Gitlab Milestone migration if DueDate isn't set

* Empty Milestone due dates properly return nil, not zero time

* Add GITLAB_READ_TOKEN to drone unit-test step

* Add working gitlab_test.go.
A Personal Access Token, given in env variable GITLAB_READ_TOKEN
is required to run the test.

* Fix linting issues

* Add modified JS files

* Remove pre-build JS files

* Only merged PRs are marged as merged/closed

* Test topics

* Skip test if gitlab is inaccessible

* Grab personal token from username, not password.
Matches Github migration implementation

* Add SetContext() to GitlabDownloader.

* Checking Updated field in Issues.

* Actually fetch Issue Updated time from Gitlab

* Add Gitlab migration GetReviews() stub

* Fix Patch and Clone URLs

* check Updated too

* fix mod

* make vendor with go1.14

Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

vendor/github.com/xanzy/go-gitlab/namespaces.go

@@ -0,0 +1,122 @@
+//
+// Copyright 2017, Sander van Harmelen
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package gitlab
+
+import (
+	"fmt"
+)
+
+// NamespacesService handles communication with the namespace related methods
+// of the GitLab API.
+//
+// GitLab API docs: https://docs.gitlab.com/ce/api/namespaces.html
+type NamespacesService struct {
+	client *Client
+}
+
+// Namespace represents a GitLab namespace.
+//
+// GitLab API docs: https://docs.gitlab.com/ce/api/namespaces.html
+type Namespace struct {
+	ID                          int    `json:"id"`
+	Name                        string `json:"name"`
+	Path                        string `json:"path"`
+	Kind                        string `json:"kind"`
+	FullPath                    string `json:"full_path"`
+	ParentID                    int    `json:"parent_id"`
+	MembersCountWithDescendants int    `json:"members_count_with_descendants"`
+}
+
+func (n Namespace) String() string {
+	return Stringify(n)
+}
+
+// ListNamespacesOptions represents the available ListNamespaces() options.
+//
+// GitLab API docs: https://docs.gitlab.com/ce/api/namespaces.html#list-namespaces
+type ListNamespacesOptions struct {
+	ListOptions
+	Search *string `url:"search,omitempty" json:"search,omitempty"`
+}
+
+// ListNamespaces gets a list of projects accessible by the authenticated user.
+//
+// GitLab API docs: https://docs.gitlab.com/ce/api/namespaces.html#list-namespaces
+func (s *NamespacesService) ListNamespaces(opt *ListNamespacesOptions, options ...OptionFunc) ([]*Namespace, *Response, error) {
+	req, err := s.client.NewRequest("GET", "namespaces", opt, options)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var n []*Namespace
+	resp, err := s.client.Do(req, &n)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return n, resp, err
+}
+
+// SearchNamespace gets all namespaces that match your string in their name
+// or path.
+//
+// GitLab API docs:
+// https://docs.gitlab.com/ce/api/namespaces.html#search-for-namespace
+func (s *NamespacesService) SearchNamespace(query string, options ...OptionFunc) ([]*Namespace, *Response, error) {
+	var q struct {
+		Search string `url:"search,omitempty" json:"search,omitempty"`
+	}
+	q.Search = query
+
+	req, err := s.client.NewRequest("GET", "namespaces", &q, options)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var n []*Namespace
+	resp, err := s.client.Do(req, &n)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return n, resp, err
+}
+
+// GetNamespace gets a namespace by id.
+//
+// GitLab API docs:
+// https://docs.gitlab.com/ce/api/namespaces.html#get-namespace-by-id
+func (s *NamespacesService) GetNamespace(id interface{}, options ...OptionFunc) (*Namespace, *Response, error) {
+	namespace, err := parseID(id)
+	if err != nil {
+		return nil, nil, err
+	}
+	u := fmt.Sprintf("namespaces/%s", namespace)
+
+	req, err := s.client.NewRequest("GET", u, nil, options)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	n := new(Namespace)
+	resp, err := s.client.Do(req, n)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return n, resp, err
+}