vms/recipes/debian/provisionning/conf/common/templater.start

105 lines
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#!/usr/bin/env bash
#
# Generate all the configuration files
# Get all the values from the VLS_DIR
# Process each template from the TPL_DIR with this values
#
ENV_FILE=${ENV_FILE:-/var/run/one-context/one_env}
TPL_DIR="/usr/share/builder/templates"
VLS_DIR="/usr/share/builder/values"
CONFIG=""
if [ -f "${ENV_FILE}" ]; then
. ${ENV_FILE}
fi
BTR="$(command -v btr)"
if [ "${?}" -ne 0 ]; then
echo "Warning: Nothing to do the templater is not installed"
exit 0
fi
if [ ! -e "${TPL_DIR}" ]; then
echo "Error: The template dir is missing (${TPL_DIR})"
exit 1
fi
if [ ! -e "${VLS_DIR}" ]; then
echo "Error: The template dir is missing (${VLS_DIR})"
exit 1
fi
jsonQuery() {
local data="${1}"
local query="${2}"
echo "${data}" | jq -cr "${query}"
}
# NAME: @jsonMerge
# AIM: Merge two json structures
# NOTES:
# The last one has de last word
# if you have the same key in A and B
# this keeps the value of the B structure.
# PARAMS:
# $1: original JSON Structure
# $2: updated JSON Structure
jsonMerge() {
local data="${1}"
local data2="${2}"
echo "${data} ${data2}" | jq -cr -s ".[0] * .[1]"
}
jsonUpdateVal() {
local json="${1}"
local key="${2}"
local value="${3}"
echo "${json}" | jq --arg a "${value}" "${key} = \$a"
}
getValues() {
local values=""
for file in $(find ${VLS_DIR} -name "*.json"); do
values="${values}$(cat ${file})"
done
if [ -n "${RAW_CONFIG}" ]; then
values="$(jsonMerge ${values} ${RAW_CONFIG})"
fi
for svc in $(echo ${values} | jq -cr '.Services|keys[]'); do
for key in $(echo ${values} | jq -cr ".Services.${svc}.Vars|keys[]"); do
ukey=${key^^}
vkeys="$(echo ${values} | jq -cr \".Services.${svc}.Vars.${key}\|keys[]\")"
if [ ${?} -eq 0 ]; then
for var in $(echo ${values} | jq -cr ".Services.${svc}.Vars.${key}|keys[]"); do
uvar=${var^^}
val=$(eval echo "\$${ukey}_${uvar}")
if [ -n "${val}" ]; then
values=$(jsonUpdateVal "${values}" ".Services.${svc}.Vars.${key}.${var}" "${val}")
fi
done
else
values=$(jsonUpdateVal "${values}" ".Services.${svc}.Vars.${key}" "${!ukey}")
fi
done
done
echo ${values}
}
processTemplates() {
${BTR} -t ${TPL_DIR} -c "${1}"
}
VALUES=$(getValues)
file=$(mktemp)
echo "${VALUES}" > "${file}"
processTemplates "${file}"
rm -rf "${file}"