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Load environment variables from dotenv / .env file in Bash
if [ ! -f .env ]
then
export $(cat .env | xargs)
fi
@MrYutz
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MrYutz commented Nov 11, 2021

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

I like this too.

@n1k0
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n1k0 commented Mar 1, 2022

oh-my-zsh users can also activate the dotenv plugin.

@BinitaBharati
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BinitaBharati commented Mar 3, 2022

source .env

works for me

wont work if you have # in your .env

Thanks for this.

@xswirelab
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xswirelab commented Mar 12, 2022

@devzom
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devzom commented Mar 16, 2022

Great work ! :)

  • I have .env with [VAR1=xyz, VAR2=233, NPM_TOKEN=123]

  • Seems that this example from @valmayaki :

if [ -f .env ]; then
  export $(echo $(cat .env | sed 's/#.*//g'| xargs) | envsubst)
fi
# always response as one liner with all the variables
  • I switched to use this without xargs:
export "$(grep -vE "^(#.*|\s*)$" .env)"
# as it's responding with single value ex: 
echo $NPM_TOKEN # just print the single variable

thanks to all for great cooperation <3

@michchan
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michchan commented Mar 27, 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

This works!

@alphanetEX
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alphanetEX commented May 20, 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

Many thanks for this solution reference

@theofanisv
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theofanisv commented Jun 17, 2022

That 's great, thanks

@wffranco
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wffranco commented Jun 29, 2022

@chengxuncc

using export $(grep -v '^#' .env | xargs) could not export the following,

A=10
B=$A
C=${A}

now, echo $B produces $A while it should print 10

this read line by line, allowing to use previous set variables

  while read -r LINE; do
    if [[ $LINE == *'='* ]] && [[ $LINE != '#'* ]]; then
      ENV_VAR="$(echo $LINE | envsubst)"
      eval "declare $ENV_VAR"
    fi
  done < .env

@Krong1997
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Krong1997 commented Jul 7, 2022

@wffranco

@chengxuncc
using export $(grep -v '^#' .env | xargs) could not export the following,

A=10
B=$A
C=${A}

now, echo $B produces $A while it should print 10

this read line by line, allowing to use previous set variables

  while read -r LINE; do
    if [[ $LINE == *'='* ]] && [[ $LINE != '#'* ]]; then
      ENV_VAR="$(echo $LINE | envsubst)"
      eval "declare $ENV_VAR"
    fi
  done < .env

This solution is helpful!
Thanks a lot!

@bergkvist
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bergkvist commented Jul 26, 2022

You can also do:

eval "$(
  cat .env | awk '!/^\s*#/' | awk '!/^\s*$/' | while IFS='' read -r line; do
    key=$(echo "$line" | cut -d '=' -f 1)
    value=$(echo "$line" | cut -d '=' -f 2-)
    echo "export $key=\"$value\""
  done
)"

This ignores empty lines, and lines starting with # (comments). If you replace eval with echo - you can inspect the generated code.

@richarddewit
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richarddewit commented Jul 28, 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

@jairajsahgal
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jairajsahgal commented Jul 29, 2022

[ ! -f .env ] || export $(sed 's/#.*//g' .env | xargs)

Update: TEXT="abc#def" not work as expected, so just replace line begin with #.

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

This one works for django .env

@SrEnrique
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SrEnrique commented Jul 31, 2022

this works for me

#!/usr/bin/env bash
. .env

@drjasonharrison
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drjasonharrison commented Sep 1, 2022

For those using sed to rewrite their .env files before evaluation by bash, for example the solution suggested by @kolypto in https://gist.github.com/mihow/9c7f559807069a03e302605691f85572?permalink_comment_id=3625310#gistcomment-3625310

I ran into another case that hadn't been considered: Windows line endings "\r\n". I'm now using:

    set -o allexport # enable all variable definitions to be exported
    source <(sed -e "s/\r//" -e '/^#/d;/^\s*$/d' -e "s/'/'\\\''/g" -e "s/=\(.*\)/=\"\1\"/g" "${ENV_FILE}")
    set +o allexport

@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)

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