Fix Bitbucket Server import not allowing personal projects

Bitbucket Server places personal projects in a namespace called
`~username`. This change allows those projects and also strips
them from the GitLab namespace.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/53419

app/controllers/import/bitbucket_server_controller.rb

@@ -13,7 +13,10 @@ class Import::BitbucketServerController < Import::BaseController
   # Repository names are limited to 128 characters. They must start with a
   # letter or number and may contain spaces, hyphens, underscores, and periods.
   # (https://community.atlassian.com/t5/Answers-Developer-Questions/stash-repository-names/qaq-p/499054)
-  VALID_BITBUCKET_CHARS = /\A[\w\-_\.\s]+\z/
+  #
+  # Bitbucket Server starts personal project names with a tilde.
+  VALID_BITBUCKET_PROJECT_CHARS = /\A~?[\w\-\.\s]+\z/
+  VALID_BITBUCKET_CHARS = /\A[\w\-\.\s]+\z/
 
   def new
   end
@@ -91,7 +94,7 @@ class Import::BitbucketServerController < Import::BaseController
 
     return render_validation_error('Missing project key') unless @project_key.present? && @repo_slug.present?
     return render_validation_error('Missing repository slug') unless @repo_slug.present?
-    return render_validation_error('Invalid project key') unless @project_key =~ VALID_BITBUCKET_CHARS
+    return render_validation_error('Invalid project key') unless @project_key =~ VALID_BITBUCKET_PROJECT_CHARS
     return render_validation_error('Invalid repository slug') unless @repo_slug =~ VALID_BITBUCKET_CHARS
   end
 

app/helpers/import_helper.rb

@@ -8,7 +8,9 @@ module ImportHelper
   end
 
   def sanitize_project_name(name)
-    name.gsub(/[^\w\-]/, '-')
+    # For personal projects in Bitbucket in the form ~username, we can
+    # just drop that leading tilde.
+    name.gsub(/\A~+/, '').gsub(/[^\w\-]/, '-')
   end
 
   def import_project_target(owner, name)

app/views/import/bitbucket_server/status.html.haml

@@ -56,7 +56,7 @@
               .project-path.input-group-prepend
                 - if current_user.can_select_namespace?
                   - selected = params[:namespace_id] || :extra_group
-                  - opts = current_user.can_create_group? ? { extra_group: Group.new(name: repo.project_key, path: repo.project_key) } : {}
+                  - opts = current_user.can_create_group? ? { extra_group: Group.new(name: sanitize_project_name(repo.project_key), path: sanitize_project_name(repo.project_key)) } : {}
                   = select_tag :namespace_id, namespaces_options(selected, opts.merge({ display_path: true })), { class: 'input-group-text select2 js-select-namespace', tabindex: 1 }
                 - else
                   = text_field_tag :path, current_user.namespace_path, class: "input-group-text input-large form-control", tabindex: 1, disabled: true

changelogs/unreleased/sh-issue-53419-fix.yml

+---
+title: Fix Bitbucket Server import not allowing personal projects
+merge_request: 23601
+author:
+type: fixed

spec/controllers/import/bitbucket_server_controller_spec.rb

@@ -28,9 +28,11 @@ describe Import::BitbucketServerController do
   end
 
   describe 'POST create' do
+    let(:project_name) { "my-project_123" }
+
     before do
       allow(controller).to receive(:bitbucket_client).and_return(client)
-      repo = double(name: 'my-project')
+      repo = double(name: project_name)
       allow(client).to receive(:repo).with(project_key, repo_slug).and_return(repo)
       assign_session_tokens
     end
@@ -39,7 +41,7 @@ describe Import::BitbucketServerController do
 
     it 'returns the new project' do
       allow(Gitlab::BitbucketServerImport::ProjectCreator)
-        .to receive(:new).with(project_key, repo_slug, anything, 'my-project', user.namespace, user, anything)
+        .to receive(:new).with(project_key, repo_slug, anything, project_name, user.namespace, user, anything)
         .and_return(double(execute: project))
 
       post :create, params: { project: project_key, repository: repo_slug }, format: :json
@@ -47,6 +49,20 @@ describe Import::BitbucketServerController do
       expect(response).to have_gitlab_http_status(200)
     end
 
+    context 'with project key with tildes' do
+      let(:project_key) { '~someuser_123' }
+
+      it 'successfully creates a project' do
+        allow(Gitlab::BitbucketServerImport::ProjectCreator)
+          .to receive(:new).with(project_key, repo_slug, anything, project_name, user.namespace, user, anything)
+          .and_return(double(execute: project))
+
+        post :create, params: { project: project_key, repository: repo_slug, format: :json }
+
+        expect(response).to have_gitlab_http_status(200)
+      end
+    end
+
     it 'returns an error when an invalid project key is used' do
       post :create, params: { project: 'some&project' }
 
@@ -69,7 +85,7 @@ describe Import::BitbucketServerController do
 
     it 'returns an error when the project cannot be saved' do
       allow(Gitlab::BitbucketServerImport::ProjectCreator)
-        .to receive(:new).with(project_key, repo_slug, anything, 'my-project', user.namespace, user, anything)
+        .to receive(:new).with(project_key, repo_slug, anything, project_name, user.namespace, user, anything)
         .and_return(double(execute: build(:project)))
 
       post :create, params: { project: project_key, repository: repo_slug }, format: :json

spec/helpers/import_helper_spec.rb

@@ -2,6 +2,10 @@ require 'rails_helper'
 
 describe ImportHelper do
   describe '#sanitize_project_name' do
+    it 'removes leading tildes' do
+      expect(helper.sanitize_project_name('~~root')).to eq('root')
+    end
+
     it 'removes whitespace' do
       expect(helper.sanitize_project_name('my test repo')).to eq('my-test-repo')
     end