Hide merge request option in IDE when merge requests are disabled

Closes #45698

app/assets/javascripts/ide/components/commit_sidebar/actions.vue

 <script>
-import { mapActions, mapState } from 'vuex';
+import { mapActions, mapState, mapGetters } from 'vuex';
 import { sprintf, __ } from '~/locale';
 import * as consts from '../../stores/modules/commit/constants';
 import RadioGroup from './radio_group.vue';
@@ -10,6 +10,7 @@ export default {
   },
   computed: {
     ...mapState(['currentBranchId', 'changedFiles', 'stagedFiles']),
+    ...mapGetters(['currentProject']),
     commitToCurrentBranchText() {
       return sprintf(
         __('Commit to %{branchName} branch'),
@@ -52,6 +53,7 @@ export default {
       :show-input="true"
     />
     <radio-group
+      v-if="currentProject.merge_requests_enabled"
       :value="$options.commitToNewBranchMR"
       :label="__('Create a new branch and merge request')"
       :show-input="true"

changelogs/unreleased/ide-hide-merge-request-if-disabled.yml

+---
+title: Hide merge request option in IDE when disabled
+merge_request:
+author:
+type: changed

spec/javascripts/ide/components/commit_sidebar/actions_spec.js

@@ -3,6 +3,7 @@ import store from '~/ide/stores';
 import commitActions from '~/ide/components/commit_sidebar/actions.vue';
 import { createComponentWithStore } from 'spec/helpers/vue_mount_component_helper';
 import { resetStore } from 'spec/ide/helpers';
+import { projectData } from 'spec/ide/mock_data';
 
 describe('IDE commit sidebar actions', () => {
   let vm;
@@ -13,6 +14,10 @@ describe('IDE commit sidebar actions', () => {
     vm = createComponentWithStore(Component, store);
 
     vm.$store.state.currentBranchId = 'master';
+    vm.$store.state.currentProjectId = 'abcproject';
+    vm.$store.state.projects.abcproject = {
+      ...projectData,
+    };
 
     vm.$mount();
 
@@ -32,4 +37,19 @@ describe('IDE commit sidebar actions', () => {
   it('renders current branch text', () => {
     expect(vm.$el.textContent).toContain('Commit to master branch');
   });
+
+  it('hides merge request option when project merge requests are disabled', done => {
+    vm.$destroy();
+
+    vm.$store.state.projects.abcproject.merge_requests_enabled = false;
+
+    vm.$mount();
+
+    vm.$nextTick(() => {
+      expect(vm.$el.querySelectorAll('input[type="radio"]').length).toBe(2);
+      expect(vm.$el.textContent).not.toContain('Create a new branch and merge request');
+
+      done();
+    });
+  });
 });

spec/javascripts/ide/mock_data.js

@@ -12,4 +12,5 @@ export const projectData = {
     },
   },
   mergeRequests: {},
+  merge_requests_enabled: true,
 };