docker: poorly formatted environment: variable contains whitespaces

docker environment-variables multiline

The problem occur because the way docker parses this file it does not accept multi-line string and whitespaces in the key names. See relevant issue.

Workaround. Strip all line-endings from multi-line variables:

>.envfor var in $(compgen -v | grep -Ev '^(BASH)'); do    var_fixed=$(printf "%s" "${!var}" | tr -d '\n' )    echo "$var=${var_fixed}" >>.envdone

Each line explained:

>.env - make .env to be an empty file
for var in $(compgen -v | grep -Ev '^(BASH)'); do - iterate over env keys
var_fixed=$(printf "%s" "${!var}" | tr -d '\n' ) - remove new-lines from key value
echo "$var=${var_fixed}" >>.env - write key=value pair to .env file

docker environment-variables multiline

For me this was caused by having export in the .env file:

export ENDPOINT=https://endpoint.io

Instead do

ENDPOINT=https://endpoint.io

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