Simplify the requirements setup further

Signed-off-by: Filipe Laíns <lains@riseup.net>

Author: FFY00

Doc/Makefile

@@ -14,8 +14,7 @@ PAPER        =
 SOURCES      =
 DISTVERSION  = $(shell $(PYTHON) tools/extensions/patchlevel.py)
 IS_PYTHON_BUILD = $(shell $(PYTHON) -c 'import sysconfig; print("true") if sysconfig.is_python_build() else None')
-REQUIREMENTS = requirements.txt
-REQUIREMENTS_NO_BUILD = requirements-no-build.txt
+REQUIREMENTS = $(if $(IS_PYTHON_BUILD),requirements.txt,requirements-no-build.txt)
 SPHINXERRORHANDLING = --fail-on-warning
 
 # Internal variables.
@@ -168,19 +167,18 @@ clean-venv:
 
 .PHONY: venv
 venv:
-	requirements = -r $(REQUIREMENTS) $(if $(IS_PYTHON_BUILD),,-r $(REQUIREMENTS_NO_BUILD))
 	@if [ -d $(VENVDIR) ] ; then \
 		echo "venv already exists."; \
 		echo "To recreate it, remove it first with \`make clean-venv'."; \
 	else \
 		echo "Creating venv in $(VENVDIR)"; \
 		if $(UV) --version >/dev/null 2>&1; then \
 			$(UV) venv --python=$(PYTHON) $(VENVDIR); \
-			VIRTUAL_ENV=$(VENVDIR) $(UV) pip install $(requirements); \
+			VIRTUAL_ENV=$(VENVDIR) $(UV) pip install -r $(REQUIREMENTS); \
 		else \
 			$(PYTHON) -m venv $(VENVDIR); \
 			$(VENVDIR)/bin/python3 -m pip install --upgrade pip; \
-			$(VENVDIR)/bin/python3 -m pip install $(requirements); \
+			$(VENVDIR)/bin/python3 -m pip install -r $(REQUIREMENTS); \
 		fi; \
 		echo "The venv has been created in the $(VENVDIR) directory"; \
 	fi

Doc/requirements-no-build.txt

@@ -1,3 +1,5 @@
+-r requirements.txt
+
 # Requirements when not running the build Python,
 # such as optional native extensions.