Sandbox::https://github.com/qube-rt/docker-library-python/blob/master/apply-templates.sh

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#!/usr/bin/env bash

set -Eeuo pipefail

[ -f versions.json ] # run "versions.sh" first

jqt='.jq-template.awk'

if [ -n "${BASHBREW_SCRIPTS:-}" ]; then

jqt="$BASHBREW_SCRIPTS/jq-template.awk"

elif [ "$BASH_SOURCE" -nt "$jqt" ]; then

# https://github.com/docker-library/bashbrew/blob/master/scripts/jq-template.awk

wget -qO "$jqt" 'https://github.com/docker-library/bashbrew/raw/9f6a35772ac863a0241f147c820354e4008edf38/scripts/jq-template.awk'

if [ "$#" -eq 0 ]; then

versions="$(jq -r 'keys | map(@sh) | join(" ")' versions.json)"

eval "set -- $versions"

generated_warning() {

cat <<-EOH

# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"

# PLEASE DO NOT EDIT IT DIRECTLY.

EOH

}

for version; do

export version

rm -rf "$version/"

variants="$(jq -r '.[env.version].variants | map(@sh) | join(" ")' versions.json)"

eval "variants=( $variants )"

for dir in "${variants[@]}"; do

variant="$(basename "$dir")" # "buster", "windowsservercore-1809", etc

export variant

case "$dir" in

windows/*)

windowsVariant="${variant%%-*}" # "windowsservercore", "nanoserver"

windowsRelease="${variant#$windowsVariant-}" # "ltsc2022", "1809", etc

windowsVariant="${windowsVariant#windows}" # "servercore", "nanoserver"

export windowsVariant windowsRelease

template='Dockerfile-windows.template'

;;

template='Dockerfile-linux.template'

;;

esac

echo "processing $version/$dir ..."

mkdir -p "$version/$dir"

{

generated_warning

gawk -f "$jqt" "$template"

} > "$version/$dir/Dockerfile"

done

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