Parse a .env (dotenv) file directly using BASH

parse_dotenv.bash

# 1. Pass the env-vars to MYCOMMAND
eval $(egrep -v '^#' .env | xargs -d '\n') MYCOMMAND
# … or ...
# 2. Export the vars in .env into your shell:
export $(egrep -v '^#' .env | xargs -d '\n')

# 3. Avoid existent vars overriding
source <(grep -v '^#' .env | sed -E 's|^(.+)=(.*)$|: ${\1=\2}; export \1|g')

# 4.
set -o allexport
[[ -f .env ]] && source .env
set +o allexport