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Load environment variables from dotenv / .env file in Bash
if [ ! -f .env ]
then
export $(cat .env | xargs)
fi
@bolorundurovj
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bolorundurovj commented Sep 12, 2022

The cleanest solution I found for this was using allexport and source like this

set -o allexport
source .env set
+o allexport

This was by far the best solution here for me, removed all the complexity around certain chars, spaces comments etc. Just needed a tweak on formatting to prevent others being tripped up, should be:
set -o allexport
source .env
set +o allexport

From man set:

       -o option
             This  option  is  supported if the system supports the User Portability Utilities op‐
             tion. It shall set various options, many of which shall be equivalent to  the  single
             option letters. The following values of option shall be supported:

             allexport Equivalent to -a.

So this is the same as

set -a            
source .env
set +a

Worked for me

@rjchicago
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rjchicago commented Sep 12, 2022

The above worked fine for me, but thought I'd share the solution I went with:
https://stackoverflow.com/a/30969768/179329

set -o allexport; source .env; set +o allexport

As @richarddewit pointed out above, -a/+a can be used in place of -o allexport to be more concise (thanks!).

I now use the following simple line to source .env files into my scripts...

set -a; source .env; set +a

@miedza
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miedza commented Sep 29, 2022

export $(awk -F= '{output=output" "$1"="$2} END {print output}' aaa.env)

@bergpb
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bergpb commented Dec 9, 2022

[ ! -f .env ] || export $(grep -v '^#' .env | xargs)

Sweet, works like a charm for me, thanks.

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