4-fly-patch-products.sh

#! /bin/bash

set -euo pipefail

show_usage () {
    pipeline_name=$1
    cat << EOF
Usage: $(basename "$0") -t <Concourse target name> -p <PCF platform code> -n <pipeline name> [OPTION]

  -t <Concourse target name>          the logged in fly's target name
  -p <PCF platform code>              the PCF platform code the pipeline is created for, e.g. prod
  -n <pipeline name>                  the pipeline name

  -s <true/false to specify stemcell> true/false to indicate whether to specify stemcell
  -o <ops files seperated by comma>   the ops files, seperated by comma, e.g. file1.yml,file2.yml
  -h                                  display this help and exit

Examples:
  $(basename "$0") -t prod -p prod -n ${pipeline_name}
  $(basename "$0") -t prod -p prod -n ${pipeline_name} -s true
  $(basename "$0") -t prod -p prod -n ${pipeline_name} -o ops-file1.yml
  $(basename "$0") -t prod -p prod -n ${pipeline_name} -o ops-file1.yml,ops-file1.yml

EOF
}

opt_t=''    # fly target name
opt_p=''    # PCF platform code
opt_n=''    # pipeline name
opt_s=''    # true/false flag wether to specify stemcell
opt_o=()    # ops files seperated by comma

suggested_pipeline_name="install-upgrade-products"

while getopts "t:p:n:s:o:h" opt; do
    case $opt in
        t)  opt_t=$OPTARG
            ;;
        p)  opt_p=$OPTARG
            ;;
        n)  opt_n=$OPTARG
            ;;
        s)  opt_s=$OPTARG
            ;;
        o)  opt_o+=("$OPTARG")
            ;;
        h)
            show_usage "$suggested_pipeline_name"
            exit 0
            ;;
        ?)
            show_usage "$suggested_pipeline_name" >&2
            exit 1
            ;;
    esac
done

if [ -z "$opt_t" ] || [ -z "$opt_p" ] || [ -z "$opt_n" ]; then
    echo -e "ERROR: please specify Concourse's target name with '-t', PCF platform code with '-p', and pipeline name with '-n' \n"
    show_usage "$suggested_pipeline_name"
    exit 0
fi

if ! [ -x "$(command -v ytt)" ]; then
    echo "ytt tool is required. Please get it from https://github.com/k14s/ytt/releases"
    exit 1
fi

config_file="cat"
if [[ ${#opt_o[@]} > 0 ]]; then
    if ! [ -x "$(command -v yaml-patch)" ]; then
        echo "yaml-patch tool is required for ops-files. Please get it from https://github.com/krishicks/yaml-patch/releases"
        exit 1
    fi

    config_file=" yaml-patch "
    for ops_file in "${opt_o[@]}"; do
        config_file+=" -o ${ops_file} "
    done
fi

if [ "$opt_s" == "true" ] ; then
    fly -t $opt_t set-pipeline -p $opt_n \
        -c <( ytt template \
                -f pipelines/patch-products-with-specific-stemcell.yml \
                -f templates/functions.lib.yml \
                -f templates/groups.lib.yml \
                -f templates/resource-types.lib.yml \
                -f templates/resources-patch-with-specific-stemcell.lib.yml \
                -f templates/jobs-common.lib.yml  \
                -f templates/jobs-patch-with-specific-stemcell.lib.yml  \
                -f vars-$opt_p/vars-products.yml  \
                | $config_file \
            ) \
        -l vars-$opt_p/vars-common.yml
else
    fly -t $opt_t set-pipeline -p $opt_n \
        -c <( ytt template \
                -f pipelines/patch-products.yml \
                -f templates/functions.lib.yml \
                -f templates/groups.lib.yml \
                -f templates/resource-types.lib.yml \
                -f templates/resources-patch.lib.yml \
                -f templates/jobs-common.lib.yml  \
                -f templates/jobs-patch.lib.yml  \
                -f vars-$opt_p/vars-products.yml  \
                | $config_file \
            ) \
        -l vars-$opt_p/vars-common.yml
fi