build: add compile-requirements make target

Makefile

@@ -13,7 +13,7 @@ export BROWSER_PYSCRIPT
 BROWSER := python -c "$$BROWSER_PYSCRIPT"
 
 .PHONY: clean, coverage, diff_cover, docs, help, dev_requirements, test, test_quality, test_requirements, upgrade,\
-		check_keywords
+		compile-requirements check_keywords
 
 help: ## Display this help message
 	@echo "Please use \`make <target>' where <target> is one of"
@@ -51,24 +51,27 @@ $(COMMON_CONSTRAINTS_TXT):
 	wget -O "$(@)" https://raw.githubusercontent.com/edx/edx-lint/master/edx_lint/files/common_constraints.txt || touch "$(@)"
 	echo "$(COMMON_CONSTRAINTS_TEMP_COMMENT)" | cat - $(@) > temp && mv temp $(@)
 
-export CUSTOM_COMPILE_COMMAND = make upgrade
-upgrade: piptools $(COMMON_CONSTRAINTS_TXT)	## update the requirements/*.txt files with the latest packages satisfying requirements/*.in
+compile-requirements: export CUSTOM_COMPILE_COMMAND = make upgrade
+compile-requirements: piptools $(COMMON_CONSTRAINTS_TXT)	## update the requirements/*.txt files with the latest packages satisfying requirements/*.in
 	# Make sure to compile files after any other files they include!
-	pip-compile --upgrade --allow-unsafe --rebuild -o requirements/pip.txt requirements/pip.in
-	pip-compile --upgrade --verbose --rebuild -o requirements/pip-tools.txt requirements/pip-tools.in
+	pip-compile ${COMPILE_OPTS} --allow-unsafe --rebuild -o requirements/pip.txt requirements/pip.in
+	pip-compile ${COMPILE_OPTS} --verbose --rebuild -o requirements/pip-tools.txt requirements/pip-tools.in
 	pip install -qr requirements/pip.txt
 	pip install -qr requirements/pip-tools.txt
-	pip-compile --upgrade --verbose --rebuild -o requirements/base.txt requirements/base.in
-	pip-compile --upgrade --verbose --rebuild -o requirements/docs.txt requirements/docs.in
-	pip-compile --upgrade --verbose --rebuild -o requirements/test.txt requirements/test.in
-	pip-compile --upgrade --verbose --rebuild -o requirements/dev.txt requirements/dev.in
-	pip-compile --upgrade --verbose --rebuild -o requirements/tox.txt requirements/tox.in
-	pip-compile --upgrade --verbose --rebuild -o requirements/ci.txt requirements/ci.in
+	pip-compile ${COMPILE_OPTS} --verbose --rebuild -o requirements/base.txt requirements/base.in
+	pip-compile ${COMPILE_OPTS} --verbose --rebuild -o requirements/docs.txt requirements/docs.in
+	pip-compile ${COMPILE_OPTS} --verbose --rebuild -o requirements/test.txt requirements/test.in
+	pip-compile ${COMPILE_OPTS} --verbose --rebuild -o requirements/dev.txt requirements/dev.in
+	pip-compile ${COMPILE_OPTS} --verbose --rebuild -o requirements/tox.txt requirements/tox.in
+	pip-compile ${COMPILE_OPTS} --verbose --rebuild -o requirements/ci.txt requirements/ci.in
 	# Let tox control the Django and DRF versions for tests
 	sed -i.tmp '/^django==/d' requirements/test.txt
 	sed -i.tmp '/^djangorestframework==/d' requirements/test.txt
 	rm requirements/test.txt.tmp
 
+upgrade:  ## update the pip requirements files to use the latest releases satisfying our constraints
+	$(MAKE) compile-requirements COMPILE_OPTS="--upgrade"
+
 test: clean ## Run tests in the current virtualenv
 	pytest