feat: ENABLE_LEGACY_LIBRARY_MIGRATOR flag added (#2440)

- Adds the `ENABLE_LEGACY_LIBRARY_MIGRATOR` flag. **Reason:** The migrator frontend is finishing before the backend; this flag is mainly to hide it until it is fully connected and working with the backend.
- Puts the migration warning under the new flag.

.env

@@ -36,6 +36,7 @@ ENABLE_ASSETS_PAGE=false
 ENABLE_VIDEO_UPLOAD_PAGE_LINK_IN_CONTENT_DROPDOWN=false
 ENABLE_TAGGING_TAXONOMY_PAGES=true
 ENABLE_CERTIFICATE_PAGE=true
+ENABLE_LEGACY_LIBRARY_MIGRATOR=false
 BBB_LEARN_MORE_URL=''
 HOTJAR_APP_ID=''
 HOTJAR_VERSION=6

.env.development

@@ -39,6 +39,7 @@ ENABLE_VIDEO_UPLOAD_PAGE_LINK_IN_CONTENT_DROPDOWN=true
 ENABLE_CERTIFICATE_PAGE=true
 ENABLE_NEW_VIDEO_UPLOAD_PAGE=true
 ENABLE_TAGGING_TAXONOMY_PAGES=true
+ENABLE_LEGACY_LIBRARY_MIGRATOR=true
 BBB_LEARN_MORE_URL=''
 HOTJAR_APP_ID=''
 HOTJAR_VERSION=6

.env.test

@@ -34,6 +34,7 @@ ENABLE_ASSETS_PAGE=false
 ENABLE_VIDEO_UPLOAD_PAGE_LINK_IN_CONTENT_DROPDOWN=true
 ENABLE_CERTIFICATE_PAGE=true
 ENABLE_TAGGING_TAXONOMY_PAGES=true
+ENABLE_LEGACY_LIBRARY_MIGRATOR=true
 BBB_LEARN_MORE_URL=''
 INVITE_STUDENTS_EMAIL_TO="someone@domain.com"
 ENABLE_HOME_PAGE_COURSE_API_V2=true

src/index.jsx

@@ -171,6 +171,7 @@ initialize({
         ENABLE_CERTIFICATE_PAGE: process.env.ENABLE_CERTIFICATE_PAGE || 'false',
         ENABLE_TAGGING_TAXONOMY_PAGES: process.env.ENABLE_TAGGING_TAXONOMY_PAGES || 'false',
         ENABLE_CHECKLIST_QUALITY: process.env.ENABLE_CHECKLIST_QUALITY || 'true',
+        ENABLE_LEGACY_LIBRARY_MIGRATOR: process.env.ENABLE_LEGACY_LIBRARY_MIGRATOR || 'false',
         ENABLE_GRADING_METHOD_IN_PROBLEMS: process.env.ENABLE_GRADING_METHOD_IN_PROBLEMS === 'true',
         LIBRARY_UNSUPPORTED_BLOCKS: (process.env.LIBRARY_UNSUPPORTED_BLOCKS || 'conditional,step-builder,problem-builder').split(','),
         COURSE_TEAM_SUPPORT_EMAIL: process.env.COURSE_TEAM_SUPPORT_EMAIL || null,

src/studio-home/tabs-section/libraries-tab/index.tsx

@@ -2,6 +2,7 @@ import React from 'react';
 import { useIntl } from '@edx/frontend-platform/i18n';
 import { Icon, Row } from '@openedx/paragon';
 import { Error } from '@openedx/paragon/icons';
+import { getConfig } from '@edx/frontend-platform';
 
 import AlertMessage from '@src/generic/alert-message';
 import { LoadingSpinner } from '@src/generic/Loading';
@@ -48,7 +49,7 @@ const LibrariesTab = ({
       />
     ) : (
       <>
-        <MigrateLegacyLibrariesAlert />
+        {getConfig().ENABLE_LEGACY_LIBRARY_MIGRATOR === 'true' && (<MigrateLegacyLibrariesAlert />)}
         <div className="courses-tab">
           {sortAlphabeticallyArray(libraries).map(({
             displayName, org, number, url,