Replace Select2Select component with GlDropdown

- removes Vue binding to Select2Select

app/assets/javascripts/import_entities/components/group_dropdown.vue

+<script>
+import { GlDropdown, GlSearchBoxByType } from '@gitlab/ui';
+
+export default {
+  components: {
+    GlDropdown,
+    GlSearchBoxByType,
+  },
+  inheritAttrs: false,
+  props: {
+    namespaces: {
+      type: Array,
+      required: true,
+    },
+  },
+  data() {
+    return { searchTerm: '' };
+  },
+  computed: {
+    filteredNamespaces() {
+      return this.namespaces.filter((ns) =>
+        ns.toLowerCase().includes(this.searchTerm.toLowerCase()),
+      );
+    },
+  },
+};
+</script>
+<template>
+  <gl-dropdown
+    toggle-class="gl-rounded-top-right-none! gl-rounded-bottom-right-none!"
+    class="import-entities-namespace-dropdown gl-h-7 gl-flex-fill-1"
+    data-qa-selector="target_namespace_selector_dropdown"
+    v-bind="$attrs"
+  >
+    <template #header>
+      <gl-search-box-by-type v-model.trim="searchTerm" />
+    </template>
+    <slot :namespaces="filteredNamespaces"></slot>
+  </gl-dropdown>
+</template>

app/assets/javascripts/import_entities/import_groups/components/import_table_row.vue

 <script>
 import {
   GlButton,
-  GlDropdown,
   GlDropdownDivider,
   GlDropdownItem,
   GlDropdownSectionHeader,
@@ -11,6 +10,7 @@ import {
 } from '@gitlab/ui';
 import { joinPaths } from '~/lib/utils/url_utility';
 import { s__ } from '~/locale';
+import ImportGroupDropdown from '../../components/group_dropdown.vue';
 import ImportStatus from '../../components/import_status.vue';
 import { STATUSES } from '../../constants';
 import addValidationErrorMutation from '../graphql/mutations/add_validation_error.mutation.graphql';
@@ -22,8 +22,8 @@ const DEBOUNCE_INTERVAL = 300;
 export default {
   components: {
     ImportStatus,
+    ImportGroupDropdown,
     GlButton,
-    GlDropdown,
     GlDropdownDivider,
     GlDropdownItem,
     GlDropdownSectionHeader,
@@ -83,6 +83,10 @@ export default {
   },
 
   computed: {
+    availableNamespaceNames() {
+      return this.availableNamespaces.map((ns) => ns.full_path);
+    },
+
     importTarget() {
       return this.group.import_target;
     },
@@ -153,9 +157,11 @@ export default {
           disabled: isAlreadyImported,
         }"
       >
-        <gl-dropdown
+        <import-group-dropdown
+          #default="{ namespaces }"
           :text="importTarget.target_namespace"
           :disabled="isAlreadyImported"
+          :namespaces="availableNamespaceNames"
           toggle-class="gl-rounded-top-right-none! gl-rounded-bottom-right-none!"
           class="import-entities-namespace-dropdown gl-h-7 gl-flex-grow-1"
           data-qa-selector="target_namespace_selector_dropdown"
@@ -163,22 +169,22 @@ export default {
           <gl-dropdown-item @click="$emit('update-target-namespace', '')">{{
             s__('BulkImport|No parent')
           }}</gl-dropdown-item>
-          <template v-if="availableNamespaces.length">
+          <template v-if="namespaces.length">
             <gl-dropdown-divider />
             <gl-dropdown-section-header>
               {{ s__('BulkImport|Existing groups') }}
             </gl-dropdown-section-header>
             <gl-dropdown-item
-              v-for="ns in availableNamespaces"
-              :key="ns.full_path"
+              v-for="ns in namespaces"
+              :key="ns"
               data-qa-selector="target_group_dropdown_item"
-              :data-qa-group-name="ns.full_path"
-              @click="$emit('update-target-namespace', ns.full_path)"
+              :data-qa-group-name="ns"
+              @click="$emit('update-target-namespace', ns)"
             >
-              {{ ns.full_path }}
+              {{ ns }}
             </gl-dropdown-item>
           </template>
-        </gl-dropdown>
+        </import-group-dropdown>
         <div
           class="import-entities-target-select-separator gl-h-7 gl-px-3 gl-display-flex gl-align-items-center gl-border-solid gl-border-0 gl-border-t-1 gl-border-b-1"
         >

app/assets/javascripts/import_entities/import_projects/components/import_projects_table.vue

@@ -47,18 +47,7 @@ export default {
     },
 
     availableNamespaces() {
-      const serializedNamespaces = this.namespaces.map(({ fullPath }) => ({
-        id: fullPath,
-        text: fullPath,
-      }));
-
-      return [
-        { text: __('Groups'), children: serializedNamespaces },
-        {
-          text: __('Users'),
-          children: [{ id: this.defaultTargetNamespace, text: this.defaultTargetNamespace }],
-        },
-      ];
+      return this.namespaces.map(({ fullPath }) => fullPath);
     },
 
     importAllButtonText() {
@@ -179,6 +168,7 @@ export default {
               :key="repo.importSource.providerLink"
               :repo="repo"
               :available-namespaces="availableNamespaces"
+              :user-namespace="defaultTargetNamespace"
             />
           </template>
         </tbody>

app/assets/javascripts/import_entities/import_projects/components/provider_repo_table_row.vue

 <script>
-import { GlIcon, GlBadge, GlFormInput, GlButton, GlLink } from '@gitlab/ui';
+import {
+  GlIcon,
+  GlBadge,
+  GlFormInput,
+  GlButton,
+  GlLink,
+  GlDropdownItem,
+  GlDropdownDivider,
+  GlDropdownSectionHeader,
+} from '@gitlab/ui';
 import { mapState, mapGetters, mapActions } from 'vuex';
 import { __ } from '~/locale';
-import Select2Select from '~/vue_shared/components/select2_select.vue';
+import ImportGroupDropdown from '../../components/group_dropdown.vue';
 import ImportStatus from '../../components/import_status.vue';
 import { STATUSES } from '../../constants';
 import { isProjectImportable, isIncompatible, getImportStatus } from '../utils';
@@ -10,10 +19,13 @@ import { isProjectImportable, isIncompatible, getImportStatus } from '../utils';
 export default {
   name: 'ProviderRepoTableRow',
   components: {
-    Select2Select,
+    ImportGroupDropdown,
     ImportStatus,
     GlFormInput,
     GlButton,
+    GlDropdownItem,
+    GlDropdownDivider,
+    GlDropdownSectionHeader,
     GlIcon,
     GlBadge,
     GlLink,
@@ -23,6 +35,10 @@ export default {
       type: Object,
       required: true,
     },
+    userNamespace: {
+      type: String,
+      required: true,
+    },
     availableNamespaces: {
       type: Array,
       required: true,
@@ -61,22 +77,6 @@ export default {
       return this.ciCdOnly ? __('Connect') : __('Import');
     },
 
-    select2Options() {
-      return {
-        data: this.availableNamespaces,
-        containerCssClass: 'import-namespace-select qa-project-namespace-select gl-w-auto',
-      };
-    },
-
-    targetNamespaceSelect: {
-      get() {
-        return this.importTarget.targetNamespace;
-      },
-      set(value) {
-        this.updateImportTarget({ targetNamespace: value });
-      },
-    },
-
     newNameInput: {
       get() {
         return this.importTarget.newName;
@@ -118,7 +118,29 @@ export default {
       <template v-if="repo.importSource.target">{{ repo.importSource.target }}</template>
       <template v-else-if="isImportNotStarted">
         <div class="import-entities-target-select gl-display-flex gl-align-items-stretch gl-w-full">
-          <select2-select v-model="targetNamespaceSelect" :options="select2Options" />
+          <import-group-dropdown
+            #default="{ namespaces }"
+            :text="importTarget.targetNamespace"
+            :namespaces="availableNamespaces"
+          >
+            <template v-if="namespaces.length">
+              <gl-dropdown-section-header>{{ __('Groups') }}</gl-dropdown-section-header>
+              <gl-dropdown-item
+                v-for="ns in namespaces"
+                :key="ns"
+                data-qa-selector="target_group_dropdown_item"
+                :data-qa-group-name="ns"
+                @click="updateImportTarget({ targetNamespace: ns })"
+              >
+                {{ ns }}
+              </gl-dropdown-item>
+              <gl-dropdown-divider />
+            </template>
+            <gl-dropdown-section-header>{{ __('Users') }}</gl-dropdown-section-header>
+            <gl-dropdown-item @click="updateImportTarget({ targetNamespace: ns })">{{
+              userNamespace
+            }}</gl-dropdown-item>
+          </import-group-dropdown>
           <div
             class="import-entities-target-select-separator gl-px-3 gl-display-flex gl-align-items-center gl-border-solid gl-border-0 gl-border-t-1 gl-border-b-1"
           >

app/assets/javascripts/import_entities/import_projects/index.js

@@ -38,7 +38,7 @@ export function initStoreFromElement(element) {
 
 export function initPropsFromElement(element) {
   return {
-    providerTitle: element.dataset.providerTitle,
+    providerTitle: element.dataset.provider,
     filterable: parseBoolean(element.dataset.filterable),
     paginatable: parseBoolean(element.dataset.paginatable),
   };

app/assets/javascripts/vue_shared/components/select2_select.vue

-<script>
-import $ from 'jquery';
-import 'select2';
-import { loadCSSFile } from '~/lib/utils/css_utils';
-
-export default {
-  // False positive i18n lint: https://gitlab.com/gitlab-org/frontend/eslint-plugin-i18n/issues/26
-  // eslint-disable-next-line @gitlab/require-i18n-strings
-  name: 'Select2Select',
-  props: {
-    options: {
-      type: Object,
-      required: false,
-      default: () => ({}),
-    },
-    value: {
-      type: String,
-      required: false,
-      default: '',
-    },
-  },
-
-  watch: {
-    value() {
-      $(this.$refs.dropdownInput).val(this.value).trigger('change');
-    },
-  },
-
-  mounted() {
-    loadCSSFile(gon.select2_css_path)
-      .then(() => {
-        $(this.$refs.dropdownInput)
-          .val(this.value)
-          .select2(this.options)
-          .on('change', (event) => this.$emit('input', event.target.value));
-      })
-      .catch(() => {});
-  },
-
-  beforeDestroy() {
-    $(this.$refs.dropdownInput).select2('destroy');
-  },
-};
-</script>
-
-<template>
-  <input ref="dropdownInput" type="hidden" />
-</template>

qa/qa/page/group/bulk_import.rb

@@ -10,12 +10,15 @@ module QA
 
         view "app/assets/javascripts/import_entities/import_groups/components/import_table_row.vue" do
           element :import_item
-          element :target_namespace_selector_dropdown
           element :target_group_dropdown_item
           element :import_status_indicator
           element :import_group_button
         end
 
+        view "app/assets/javascripts/import_entities/components/group_dropdown.vue" do
+          element :target_namespace_selector_dropdown
+        end
+
         # Import source group in to target group
         #
         # @param [String] source_group_name

qa/qa/page/project/import/github.rb

@@ -14,13 +14,16 @@ module QA
 
           view 'app/assets/javascripts/import_entities/import_projects/components/provider_repo_table_row.vue' do
             element :project_import_row
-            element :project_namespace_select
             element :project_path_field
             element :import_button
             element :project_path_content
             element :go_to_project_button
           end
 
+          view "app/assets/javascripts/import_entities/components/group_dropdown.vue" do
+            element :target_namespace_selector_dropdown
+          end
+
           def add_personal_access_token(personal_access_token)
             # If for some reasons this process is retried, user cannot re-enter github token in the same group
             # In this case skip this step and proceed to import project row
@@ -59,10 +62,9 @@ module QA
 
           def choose_test_namespace(full_path)
             within_repo_path(full_path) do
-              click_element :project_namespace_select
+              within_element(:target_namespace_selector_dropdown) { click_button(class: 'dropdown-toggle') }
+              click_element(:target_group_dropdown_item, group_name: Runtime::Namespace.path)
             end
-
-            search_and_select(Runtime::Namespace.path)
           end
 
           def set_path(full_path, name)

spec/frontend/import_entities/components/group_dropdown_spec.js

+import { GlSearchBoxByType, GlDropdown } from '@gitlab/ui';
+import { shallowMount } from '@vue/test-utils';
+import { nextTick } from 'vue';
+import GroupDropdown from '~/import_entities/components/group_dropdown.vue';
+
+describe('Import entities group dropdown component', () => {
+  let wrapper;
+  let namespacesTracker;
+
+  const createComponent = (propsData) => {
+    namespacesTracker = jest.fn();
+
+    wrapper = shallowMount(GroupDropdown, {
+      scopedSlots: {
+        default: namespacesTracker,
+      },
+      stubs: { GlDropdown },
+      propsData,
+    });
+  };
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('passes namespaces from props to default slot', () => {
+    const namespaces = ['ns1', 'ns2'];
+    createComponent({ namespaces });
+
+    expect(namespacesTracker).toHaveBeenCalledWith({ namespaces });
+  });
+
+  it('filters namespaces based on user input', async () => {
+    const namespaces = ['match1', 'some unrelated', 'match2'];
+    createComponent({ namespaces });
+
+    namespacesTracker.mockReset();
+    wrapper.find(GlSearchBoxByType).vm.$emit('input', 'match');
+
+    await nextTick();
+
+    expect(namespacesTracker).toHaveBeenCalledWith({ namespaces: ['match1', 'match2'] });
+  });
+});

spec/frontend/import_entities/import_groups/components/import_table_row_spec.js

-import { GlButton, GlDropdown, GlDropdownItem, GlLink, GlFormInput } from '@gitlab/ui';
+import { GlButton, GlDropdownItem, GlLink, GlFormInput } from '@gitlab/ui';
 import { shallowMount } from '@vue/test-utils';
 import Vue, { nextTick } from 'vue';
 import VueApollo from 'vue-apollo';
 import createMockApollo from 'helpers/mock_apollo_helper';
+import ImportGroupDropdown from '~/import_entities/components/group_dropdown.vue';
 import { STATUSES } from '~/import_entities/constants';
 import ImportTableRow from '~/import_entities/import_groups/components/import_table_row.vue';
 import addValidationErrorMutation from '~/import_entities/import_groups/graphql/mutations/add_validation_error.mutation.graphql';
@@ -41,7 +42,7 @@ describe('import table row', () => {
   };
   const findImportButton = () => findByText(GlButton, 'Import');
   const findNameInput = () => wrapper.find(GlFormInput);
-  const findNamespaceDropdown = () => wrapper.find(GlDropdown);
+  const findNamespaceDropdown = () => wrapper.find(ImportGroupDropdown);
 
   const createComponent = (props) => {
     apolloProvider = createMockApollo([
@@ -65,6 +66,7 @@ describe('import table row', () => {
 
     wrapper = shallowMount(ImportTableRow, {
       apolloProvider,
+      stubs: { ImportGroupDropdown },
       propsData: {
         availableNamespaces: availableNamespacesFixture,
         groupPathRegex: /.*/,

spec/frontend/import_entities/import_projects/components/import_projects_table_spec.js

@@ -11,6 +11,8 @@ import state from '~/import_entities/import_projects/store/state';
 describe('ImportProjectsTable', () => {
   let wrapper;
 
+  const USER_NAMESPACE = 'root';
+
   const findFilterField = () =>
     wrapper
       .findAllComponents(GlFormInput)
@@ -48,7 +50,7 @@ describe('ImportProjectsTable', () => {
     localVue.use(Vuex);
 
     const store = new Vuex.Store({
-      state: { ...state(), ...initialState },
+      state: { ...state(), defaultTargetNamespace: USER_NAMESPACE, ...initialState },
       getters: {
         ...getters,
         ...customGetters,

spec/frontend/import_entities/import_projects/components/provider_repo_table_row_spec.js

-import { GlBadge, GlButton } from '@gitlab/ui';
+import { GlBadge, GlButton, GlDropdown } from '@gitlab/ui';
 import { createLocalVue, shallowMount } from '@vue/test-utils';
 import { nextTick } from 'vue';
 import Vuex from 'vuex';
 import { STATUSES } from '~/import_entities//constants';
+import ImportGroupDropdown from '~/import_entities/components/group_dropdown.vue';
 import ImportStatus from '~/import_entities/components/import_status.vue';
 import ProviderRepoTableRow from '~/import_entities/import_projects/components/provider_repo_table_row.vue';
-import Select2Select from '~/vue_shared/components/select2_select.vue';
 
 describe('ProviderRepoTableRow', () => {
   let wrapper;
@@ -16,10 +16,8 @@ describe('ProviderRepoTableRow', () => {
     newName: 'newName',
   };
 
-  const availableNamespaces = [
-    { text: 'Groups', children: [{ id: 'test', text: 'test' }] },
-    { text: 'Users', children: [{ id: 'root', text: 'root' }] },
-  ];
+  const availableNamespaces = ['test'];
+  const userNamespace = 'root';
 
   function initStore(initialState) {
     const store = new Vuex.Store({
@@ -48,7 +46,7 @@ describe('ProviderRepoTableRow', () => {
     wrapper = shallowMount(ProviderRepoTableRow, {
       localVue,
       store,
-      propsData: { availableNamespaces, ...props },
+      propsData: { availableNamespaces, userNamespace, ...props },
     });
   }
 
@@ -81,9 +79,8 @@ describe('ProviderRepoTableRow', () => {
       expect(wrapper.find(ImportStatus).props().status).toBe(STATUSES.NONE);
     });
 
-    it('renders a select2 namespace select', () => {
-      expect(wrapper.find(Select2Select).exists()).toBe(true);
-      expect(wrapper.find(Select2Select).props().options.data).toBe(availableNamespaces);
+    it('renders a group namespace select', () => {
+      expect(wrapper.find(ImportGroupDropdown).props().namespaces).toBe(availableNamespaces);
     });
 
     it('renders import button', () => {
@@ -133,7 +130,7 @@ describe('ProviderRepoTableRow', () => {
     });
 
     it('does not renders a namespace select', () => {
-      expect(wrapper.find(Select2Select).exists()).toBe(false);
+      expect(wrapper.find(GlDropdown).exists()).toBe(false);
     });
 
     it('does not render import button', () => {