devilbox/.tests/scripts/env-getvar.sh
2019-11-18 00:17:10 +01:00

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#!/usr/bin/env bash
set -e
set -u
set -o pipefail
SCRIPT_PATH="$( cd "$(dirname "$0")" && pwd -P )"
DVLBOX_PATH="$( cd "${SCRIPT_PATH}/../.." && pwd -P )"
# shellcheck disable=SC1090
. "${SCRIPT_PATH}/.lib.sh"
# -------------------------------------------------------------------------------------------------
# Pre-check
# -------------------------------------------------------------------------------------------------
if [ "${#}" -ne "1" ]; then
>&2 echo "Error, requires one argument: <DIRECTIVE>"
exit 1
fi
if ! command -v awk >/dev/null 2>&1; then
>&2 echo "Error 'awk' binary not found, but required."
exit 1
fi
# -------------------------------------------------------------------------------------------------
# FUNCTIONS
# -------------------------------------------------------------------------------------------------
env_get() {
local env_path="${1}"
local directive="${2}"
if [ ! -f "${env_path}" ]; then
>&2 echo "Error, .env file does not exist in: ${env_path}"
return 1
fi
if ! grep -Eq "^${directive}=" "${env_path}"; then
>&2 echo "Error, directive does not exist in .env: ${directive}"
return 1
fi
if [ "$( grep -Ec "^${directive}=" "${env_path}" )" -ne "1" ]; then
>&2 echo "Error, directive exists multiple times in .env: ${directive}"
return 1
fi
grep -E "^${directive}=.*\$" "${env_path}" \
| awk -F'=' '{for (i=2; i<NF; i++) printf $i "="; print $NF}'
}
# -------------------------------------------------------------------------------------------------
# ENTRYPOINT
# -------------------------------------------------------------------------------------------------
env_get "${DVLBOX_PATH}/.env" "${1}"