104 lines
3.0 KiB
Plaintext
104 lines
3.0 KiB
Plaintext
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#!/bin/bash
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isAbsPath() {
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if [[ "${1:0:1}" == / || "${1:0:2}" == ~[/a-z] ]]
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then
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echo "true"
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return 0
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else
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return 1
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fi
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}
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sed_ignore_comments () {
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cmd="sed -r 'h;s/[^#]*//1;x;s/#.*//;${1};G;s/(.*)\n/\1/'"
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if (( $# == 2 )) ; then
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eval $cmd <<< "$2"
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else
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eval $cmd < /dev/stdin
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fi
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}
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clean_env_file () {
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local compact
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# -c will also remove comments and all empty lines
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[[ $1 == "-c" ]] && compact=true && shift 1
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#
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# remove trailing spaces | remove double quotes
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# | remove blanks after equals and quote value | remove any spaces before afer =
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# remove blank lines | remove comment lines if requested
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cat $1 | sed_ignore_comments s/\\s*$//g | sed_ignore_comments s/\"//g \
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| sed_ignore_comments s/\(=[[:blank:]]*\)\(.*\)/\\1\"\\2\"/ \
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| sed_ignore_comments s/\\s*=\\s*/=/g \
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| sed -rz 's/^\n+//; s/\n+$/\n/g' | if [[ $compact ]]; then grep -v '^#' | grep -v "^$" ; else cat; fi
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}
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env_file () {
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env=${1:-.env}
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[[ -f "${env}" ]] && { echo $env; return 0; } # || echo not $env
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[[ -f "${env}.env" ]] && { echo "${env}.env"; return 0; } # || echo not ${env}.env
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[[ -f "${env}/.env" ]] && { echo "${env}/.env"; return 0; } # || echo not ${env}/.env
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return 1
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}
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read_env_file() {
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while read line; do
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evar=$(echo $line | cut -d '=' -f1)
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if [[ ! ${!evar} ]]; then
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# echo DECLARE $evar via $line
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if declare -gx "$(echo "${line}" | sed 's/\"//g' )"; then
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echo loaded: ${evar}=${!evar}
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else
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echo error setting $evar
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return 1
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fi
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else
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echo $evar already set to ${!evar}
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fi
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done < <(clean_env_file -c $1)
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}
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source_env_file () {
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local default
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if efile=$(env_file $1); then
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[[ $efile == ".env" ]] && default=true
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[[ ! $(isAbsPath $efile) ]] && efile=$(realpath $efile)
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echo -e "\e[1;37m********************\e[0;37m"
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echo loading build environment with environment file
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echo $efile
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echo ----------------
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cat $efile
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echo ----------------
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if read_env_file "$efile"; then
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[[ $default ]] && echo -e "\e[1;31mNOTE: sourced default .env file in present directory\e[0;37m"
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echo -e "\e[1;37m********************\e[0;37m"
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else
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echo error occured while loading environment file
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echo $efile
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echo exiting
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echo -e "\e[1;37m********************\e[0;37m"
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return 2
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fi
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else
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if [[ $efile ]]; then
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echo unable to find an environment file with passed ${1}
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else
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echo unable to find default environment file .env
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echo using passed and default build options
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fi
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return 2
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fi
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}
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docker_image_distro() {
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local temp=/tmp/os-release.tmp
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docker create --name dummy $1 > /dev/null
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docker cp -L dummy:/etc/os-release $temp
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docker rm -f dummy > /dev/null
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echo $(cat $temp | tr [:upper:] [:lower:] | grep -Poi '(debian|ubuntu|red hat|centos|arch|alpine)' | uniq)
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rm $temp
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}
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(return 0 2>/dev/null) || docker_image_distro $@
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