Add initial generate-stackbrew-library.sh

generate-stackbrew-library.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+set -e
+
+declare -A prefixes=(
+	[upstream]=''
+	[ubuntu-trusty]='ubuntu'
+)
+
+cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
+
+versions=( upstream/ ubuntu-*/ )
+versions=( "${versions[@]%/}" )
+url='git://github.com/docker-library/busybox'
+
+echo '# maintainer: InfoSiftr <github@infosiftr.com> (@infosiftr)'
+echo '# maintainer: Jérôme Petazzoni <jerome@docker.com> (@jpetazzo)'
+
+for version in "${versions[@]}"; do
+	commit="$(cd "$version" && git log -1 --format='format:%H' -- Dockerfile $(awk 'toupper($1) == "COPY" || toupper($1) == "ADD" { for (i = 2; i < NF; i++) { print $i } }' Dockerfile))"
+	fullVersion="$(grep -m1 'ENV BUSYBOX_VERSION ' "$version/Dockerfile.builder" | cut -d' ' -f3)"
+	fullVersion="${fullVersion#*:}"
+	fullVersion="${fullVersion%-*}"
+
+	prefix="${prefixes[$version]:+${prefixes[$version]}-}"
+
+	versionAliases=()
+	while [ "${fullVersion%.*}" != "$fullVersion" ]; do
+		versionAliases+=( $prefix$fullVersion )
+		fullVersion="${fullVersion%.*}"
+	done
+	versionAliases+=( $prefix$fullVersion ${prefixes[$version]:-latest} )
+
+	echo
+	for va in "${versionAliases[@]}"; do
+		echo "$va: ${url}@${commit} $version"
+	done
+done