Please see the below Makefile:
SHELL=/bin/bash -euo pipefail
REPO_ROOT = $(shell pwd)
export VIRTUAL_ENV := ${REPO_ROOT}/venv
# bin = POSIX, Scripts = Windows
export PATH := ${VIRTUAL_ENV}/bin:${VIRTUAL_ENV}/Scripts:${PATH}
show-python: ## Show path to python and version
@echo -n "python location: "
@python -c "import sys; print(sys.executable, end='')"
@echo -n ", version: "
@python -c "import platform; print(platform.python_version())"
install: show-python
install: ## Install all dev dependencies into a local virtual environment.
export VIRTUAL_ENV="${VIRTUAL_ENV}"; \
python -m pip install -r requirements-dev.txt --progress-bar off
The install recipe only works if I manually export the environment variable VIRTUAL_ENV inside the recipe with ; chaining it into the next command. In other words, the first line of the install recipe is currently "doing something special" that I can't figure out.
What is going on here with this export being required twice?
(I am the OP).
MINGW64: Didn't Work
Per the comments, I updated the Makefile recipe:
install: show-python
install: ## Install all dev dependencies into a local virtual environment.
echo $$VIRTUAL_ENV; echo $$PATH; echo $$SHELL; echo $$BASH_VERSION
python -m pip install -r requirements-dev.txt --progress-bar off \
--extra-index-url $(PIP_EXTRA_INDEX_URL)
It prints the below, where everything looks correct:
echo $VIRTUAL_ENV; echo $PATH; echo $SHELL; echo $BASH_VERSION
/c/path/to/repo/venv
/c/path/to/repo/venv/bin:/c/path/to/repo/venv/Scripts:/c/Users/user/bin:/mingw64/bin:/usr/local/bin:/usr/bin:/usr/bin:/mingw64/bin:/usr/bin:/c/Users/user/bin:/c/Users/user/.pyenv/pyenv-win/bin:/c/Users/user/.pyenv/pyenv-win/shims:/c/Python38/Scripts:/c/Python38:/c/WINDOWS/system32:/c/WINDOWS:/c/WINDOWS/System32/Wbem:/c/WINDOWS/System32/WindowsPowerShell/v1.0:/c/WINDOWS/System32/OpenSSH:/c/ProgramData/chocolatey/bin:/c/Program Files/dotnet:/cmd:/c/Users/user/.pyenv/pyenv-win/bin:/c/Users/user/.pyenv/pyenv-win/shims:/c/Users/user/AppData/Local/Microsoft/WindowsApps:/usr/bin/vendor_perl:/usr/bin/core_perl
/usr/bin/bash.exe
5.1.16(1)-release
Note that I am using Git Bash from Git 2.38.1.windows.1 (Git for Windows) with MINGW64 (installed via msys2-runtime 3.3.6-1).
Cygwin: Works
Next, I was like maybe it's a MINGW64 issue, so let me try Cygwin (version 3.3.6-341.x86_64 which uses bash version 4.4.12(3)-release).
Sure enough, it works out the box, no need for the pass-through export VIRTUAL_ENV="${VIRTUAL_ENV}"; \.
Conclusions