Make

_README.md

Make

Arguments

Parallel processes.

-j 2
--jobs=2

Variables

$< -- first prerequisite file $^ -- all prerequisite files $@ -- target file $% -- target name ("file" in "file.json")

$(@D) -- target directory $(dir $@) -- target directory $(notdir $@) -- target file name ("file.json" in "/home/user/file.json")

Check if in virtual environment

check_virtualenv:
    @if [ -z $(VIRTUAL_ENV) ]; then \
            echo 'Not in virtual environment. Continuing...'; \
	else \
	    echo 'In virtual environment. Halting.'; \
	    exit 1; \
	fi

Resources

• https://gist.github.com/isaacs/62a2d1825d04437c6f08
• http://ricostacruz.com/cheatsheets/makefile.html

Makefile

# Default Makefile

# Save as ~/.Makefile or similar and use as starting point for new Makefiles.

PROJECT_DIR=`pwd`

# Keep intermediate files
.SECONDARY:

.PHONY: help

.DEFAULT_GOAL := help

help: ## Prints help list for targets.
	@# Source: http://marmelab.com/blog/2016/02/29/auto-documented-makefile.html
	@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z_-]+:.*?## / {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)

cleanup:  ## Removes any temporary files.
	@rm -rf tmp