Makefile cheatsheet example

Makefile.md

include .env and use envvar:

in your .env:

foo=bar

in your Makefile:

include .env

echo:
    @echo ${foo}
    @echo ${USER}

NOTE: you have to ref var with ${VAR}, not $VAR

Makefile can read envvars from both .env and your current shell:

make echo
bar
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