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Allow using docker secrets for env variables #57

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Merged
LeoColomb merged 2 commits into from
Jun 24, 2020
Merged

Allow using docker secrets for env variables #57

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1b1f514
Update docker-entrypoint.sh
jhollowe Jun 23, 2020
0ea0f4e
Apply suggestions from code review
jhollowe Jun 24, 2020
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30 changes: 30 additions & 0 deletions docker-entrypoint.sh
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Original file line number Diff line number Diff line change
@@ -1,6 +1,36 @@
#!/bin/bash
set -euo pipefail

# usage: file_env VAR [DEFAULT]
# ie: file_env 'XYZ_DB_PASSWORD' 'example'
# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
# "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
file_env() {
local var="$1"
local fileVar="${var}_FILE"
local def="${2:-}"
if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
printf 'Both %s and %s are set (but are exclusive)' "$var" "$fileVar"
fi
local val="$def"
if [ "${!var:-}" ]; then
val="${!var}"
elif [ "${!fileVar:-}" ]; then
val="$(< "${!fileVar}")"
fi
export "$var"="$val"
unset "$fileVar"
}

file_env 'YOURLS_DB_HOST'
file_env 'YOURLS_DB_USER'
file_env 'YOURLS_DB_PASS'
file_env 'YOURLS_DB_NAME'
file_env 'YOURLS_DB_PREFIX'
file_env 'YOURLS_SITE'
file_env 'YOURLS_USER'
file_env 'YOURLS_PASS'

if [ ! -e /var/www/html/yourls-loader.php ]; then
tar cf - --one-file-system -C /usr/src/yourls . | tar xf -
chown -R www-data:www-data /var/www/html
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