feat: make extract_translations to use i18n_tool

Refs: FC-0012 OEP-58

Makefile

@@ -6,6 +6,12 @@
 
 NODE_BIN=$(CURDIR)/node_modules/.bin
 
+WORKING_DIR := edx_credentials_themes
+EXTRACT_DIR := $(WORKING_DIR)/conf/locale/en/LC_MESSAGES
+EXTRACTED_DJANGO_PARTIAL := $(EXTRACT_DIR)/django-partial.po
+EXTRACTED_DJANGOJS_PARTIAL := $(EXTRACT_DIR)/djangojs-partial.po
+EXTRACTED_DJANGO := $(EXTRACT_DIR)/django.po
+
 # Generates a help message. Borrowed from https://github.com/pydanny/cookiecutter-djangopackage.
 help: ## display this help message
 	@echo "Please use \`make <target>\` where <target> is one of"
@@ -26,8 +32,16 @@ detect_changed_source_translations:
 dummy_translations:
 	cd edx_credentials_themes && i18n_tool dummy
 
-extract_translations:
-	cd edx_credentials_themes && django-admin.py makemessages -l en -d django
+extract_translations: ## extract strings to be translated, outputting .po files
+	cd $(WORKING_DIR) && i18n_tool extract
+	mv $(EXTRACTED_DJANGO_PARTIAL) $(EXTRACTED_DJANGO)
+	# Safely concatenate djangojs if it exists
+	if test -f $(EXTRACTED_DJANGOJS_PARTIAL); then \
+	  msgcat $(EXTRACTED_DJANGO) $(EXTRACTED_DJANGOJS_PARTIAL) -o $(EXTRACTED_DJANGO) && \
+	  rm $(EXTRACTED_DJANGOJS_PARTIAL); \
+	fi
+	sed -i'' -e 's/nplurals=INTEGER/nplurals=2/' $(EXTRACTED_DJANGO)
+	sed -i'' -e 's/plural=EXPRESSION/plural=\(n != 1\)/' $(EXTRACTED_DJANGO)
 
 generate_translations: extract_translations dummy_translations compile_translations
 
@@ -47,7 +61,7 @@ requirements: base_requirements
 
 test:
 	# Confirm compiled assets have not changed, indicating SASS matches CSS.
-	git diff --exit-code edx_credentials_themes/
+	git diff --exit-code edx_credentials_themes/ ":(exclude)edx_credentials_themes/conf"
 
 upgrade: export CUSTOM_COMPILE_COMMAND=make upgrade
 upgrade: ## update the requirements/*.txt files with the latest packages satisfying requirements/*.in
@@ -60,7 +74,7 @@ upgrade: ## update the requirements/*.txt files with the latest packages satisfy
 	pip-compile --upgrade -o requirements/test.txt requirements/test.in
 
 validate_translations: generate_translations detect_changed_source_translations
-	cd edx_credentials_themes && i18n_tool validate
+	## Validate translations without (i18n_tool validate) since we're moving towards complying with OEP-58
 
 install_transifex_client: ## Install the Transifex client
 	curl -o- https://raw.githubusercontent.com/transifex/cli/master/install.sh | bash

edx_credentials_themes/locale

@@ -0,0 +1 @@
+conf/locale