feat: extract from edx-platform

This contribution is part of the [FC-0012 project](https://openedx.atlassian.net/l/cp/XGS0iCcQ) which is sparked by the [Translation Infrastructure update OEP-58](https://open-edx-proposals.readthedocs.io/en/latest/architectural-decisions/oep-0058-arch-translations-management.html#specification).

.github/workflows/extract-translation-source-files.yml

@@ -39,6 +39,7 @@ jobs:
               'edx-ace',
               'edx-bulk-grades',
               'edx-ora2',
+              'edx-platform',
               'edx-proctoring',
               'FeedbackXBlock',
               'RecommenderXBlock',
@@ -182,30 +183,56 @@ jobs:
           repository: openedx/${{ matrix.repo }}
           path: translations/${{ matrix.repo }}
 
-      # Sets up Python
+      - name: prepare the environment with edx-platform specific changes
+        if: matrix.repo == 'edx-platform'
+        run: |
+          # This is needed for edx-platform base.txt packages
+          sudo apt install -y libxml2-dev libxmlsec1-dev libxslt1-dev
+
+          # There is a theme directory with it's own conf/locale directory, we need to remove that
+          rm -rf translations/${{ matrix.repo }}/themes/conf
+
+      # Setup Python
       - name: setup python
         uses: actions/setup-python@v4
+        id: setup_python
         with:
           python-version: '3.8'
+          cache: pip
+          # The `edx-platf*rm` wildcard will be expanded to `edx-platform` if its requirement file exists,
+          # otherwise it will be omitted
+          cache-dependency-path: |
+            requirements/translations.txt
+            translations/edx-platf*rm/requirements/edx/base.txt
 
       # Installs Python requirements from translations.txt
       - name: install requirements
-        run: pip install -r requirements/translations.txt
+        run: |
+          # Install requirements for all packages
+          pip install -r requirements/translations.txt
+
+          EDX_BASE_REQS=translations/edx-platform/requirements/edx/base.txt
+          if test -f $EDX_BASE_REQS; then
+            # Install edx-platform specific apps (e.g. wiki) which is required to extract translations from
+            pip install -r $EDX_BASE_REQS
+          fi
 
       # Extracts the translation source files
       - name: extract translation source files
         run: |
           cd translations/${{ matrix.repo }}
           make extract_translations
+        env:
+          IS_OPENEDX_TRANSLATIONS_WORKFLOW: yes
 
       # Validate compilation of translation source files
       - name: validate compilation of translation source files
         run: |
           cd translations/${{ matrix.repo }}
           django-admin compilemessages --locale en
 
-      # git adds only the translation source files, found in conf/locale/en
-      - name: git add the translation source files
+      # Preparations so git adds only the translation source files, found in conf/locale/en
+      - name: find the location of the translation source files
         id: add-sources
         run: |
           # set identity
@@ -217,17 +244,26 @@ jobs:
           # */*/conf/locale/en
           # but also exclude any hidden directories that might exist for some reason
           EN_DIR=$(find . -type d -not -path '*/.*' -regex ".+conf\/locale\/en$")
-          # If the directory is not found, exit with an error. This can happen if we add a repository that doesn't
-          # comply with OEP-58, or it still doesn't have any translations yet
-          if [ -z "$EN_DIR" ]; then
-            echo "Missing English locale directory for ${{ matrix.repo }}!"
-            echo "exiting with error!"
+          en_dir_count=$(echo "$EN_DIR" | wc -l)
+          # If the repo complies with OEP-58, then we'll find only one directory that matches the above criteria
+          # Otherwise, we'll consider it an error
+          if [ $en_dir_count -gt 1 ]; then
+            echo "Error: More than one English locale directory found!"
+            exit 1
+          elif [ $en_dir_count -eq 0 ]; then
+            echo "Error: Missing English locale directory for ${{ matrix.repo }}!"
             exit 1
           fi
+          # Save EN_DIR value to be used in next steps
+          echo "EN_DIR=$EN_DIR" >> $GITHUB_ENV
           # remove translations/${{ matrix.repo }}/.git so we don't commit a submodule
           rm -rf .git
+
+      - name: add repo translation source files openedx-translations
+        run: |
           # finds the django.po and djangojs.po files generated by make
           # extract_translations into EN_DIR and adds them
+          cd translations/${{ matrix.repo }}
           DJANGO_PATH=$(find $EN_DIR -name 'django.po')
           DJANGOJS_PATH=$(find $EN_DIR -name 'djangojs.po')
           ############## Special support for XBlocks