Update repository structure for future multi-version support

Author: tianon

.travis.yml

@@ -2,15 +2,16 @@ language: bash
 services: docker
 
 env:
-  - VARIANT=debian
-  - VARIANT=alpine
+  - VERSION=3.6 VARIANT=debian
+  - VERSION=3.6 VARIANT=alpine
 
 install:
   - git clone https://github.com/docker-library/official-images.git ~/official-images
 
 before_script:
   - env | sort
-  - image="rabbitmq:$VARIANT"
+  - cd "$VERSION"
+  - image="rabbitmq:$VERSION-$VARIANT"
 
 script:
   - travis_retry docker build -t "$image" "$VARIANT"

alpine/Dockerfile renamed to 3.6/alpine/Dockerfile

@@ -1,11 +1,20 @@
 #!/bin/bash
 set -eu
 
+declare -A aliases=(
+	[3.6]='3 latest'
+)
 defaultVariant='debian'
 
 self="$(basename "$BASH_SOURCE")"
 cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
 
+versions=( */ )
+versions=( "${versions[@]%/}" )
+
+# sort version numbers with highest first
+IFS=$'\n'; versions=( $(echo "${versions[*]}" | sort -rV) ); unset IFS
+
 # get the most recent commit which modified any of "$@"
 fileCommit() {
 	git log -1 --format='format:%H' HEAD -- "$@"
@@ -43,50 +52,52 @@ join() {
 	echo "${out#$sep}"
 }
 
-for variant in debian alpine; do
-	commit="$(dirCommit "$variant")"
-
-	fullVersion="$(git show "$commit":"$variant/Dockerfile" | awk '$1 == "ENV" && $2 == "RABBITMQ_VERSION" { print $3; exit }')"
-
-	versionAliases=()
-	while [ "${fullVersion%.*}" != "$fullVersion" ]; do
-		versionAliases+=( $fullVersion )
-		fullVersion="${fullVersion%.*}"
-	done
-	versionAliases+=(
-		$fullVersion
-		latest
-	)
-
-	variantAliases=( "${versionAliases[@]/%/-$variant}" )
-	variantAliases=( "${variantAliases[@]//latest-/}" )
-
-	if [ "$variant" = "$defaultVariant" ]; then
-		variantAliases=( "${versionAliases[@]}" )
-	fi
-
-	echo
-	cat <<-EOE
-		Tags: $(join ', ' "${variantAliases[@]}")
-		GitCommit: $commit
-		Directory: $variant
-	EOE
-
-	for subVariant in management; do
-		commit="$(dirCommit "$variant/$subVariant")"
-
-		subVariantAliases=( "${versionAliases[@]/%/-$subVariant}" )
-		subVariantAliases=( "${subVariantAliases[@]//latest-/}" )
-
-		if [ "$variant" != "$defaultVariant" ]; then
-			subVariantAliases=( "${subVariantAliases[@]/%/-$variant}" )
+for version in "${versions[@]}"; do
+	for variant in debian alpine; do
+		commit="$(dirCommit "$version/$variant")"
+
+		fullVersion="$(git show "$commit":"$version/$variant/Dockerfile" | awk '$1 == "ENV" && $2 == "RABBITMQ_VERSION" { print $3; exit }')"
+
+		versionAliases=()
+		while [ "$fullVersion" != "$version" -a "${fullVersion%[.-]*}" != "$fullVersion" ]; do
+			versionAliases+=( $fullVersion )
+			fullVersion="${fullVersion%[.-]*}"
+		done
+		versionAliases+=(
+			$version
+			${aliases[$version]:-}
+		)
+
+		if [ "$variant" = "$defaultVariant" ]; then
+			variantAliases=( "${versionAliases[@]}" )
+		else
+			variantAliases=( "${versionAliases[@]/%/-$variant}" )
+			variantAliases=( "${variantAliases[@]//latest-/}" )
 		fi
 
 		echo
 		cat <<-EOE
-			Tags: $(join ', ' "${subVariantAliases[@]}")
+			Tags: $(join ', ' "${variantAliases[@]}")
 			GitCommit: $commit
-			Directory: $variant/$subVariant
+			Directory: $version/$variant
 		EOE
+
+		for subVariant in management; do
+			commit="$(dirCommit "$version/$variant/$subVariant")"
+
+			subVariantAliases=( "${versionAliases[@]/%/-$subVariant}" )
+			subVariantAliases=( "${subVariantAliases[@]//latest-/}" )
+
+			if [ "$variant" != "$defaultVariant" ]; then
+				subVariantAliases=( "${subVariantAliases[@]/%/-$variant}" )
+			fi
+
+			echo
+			cat <<-EOE
+				Tags: $(join ', ' "${subVariantAliases[@]}")
+				GitCommit: $commit
+				Directory: $variant/$subVariant
+			EOE
+		done
 	done
 done

alpine/docker-entrypoint.sh renamed to 3.6/alpine/docker-entrypoint.sh

@@ -3,12 +3,37 @@ set -e
 
 cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
 
-debianVersion="$(curl -sSL 'http://www.rabbitmq.com/debian/dists/testing/main/binary-amd64/Packages' | grep -m1 -A10 '^Package: rabbitmq-server$' | grep -m1 '^Version: ' | cut -d' ' -f2)"
+versions=( "$@" )
+if [ ${#versions[@]} -eq 0 ]; then
+	versions=( */ )
+fi
+versions=( "${versions[@]%/}" )
 
-rabbitmqVersion="${debianVersion%%-*}"
+travisEnv=
+for version in "${versions[@]}"; do
+	# TODO figure out what multi-version looks like here? :(
+	debianVersion="$(curl -sSL 'http://www.rabbitmq.com/debian/dists/testing/main/binary-amd64/Packages' | grep -m1 -A10 '^Package: rabbitmq-server$' | grep -m1 '^Version: ' | cut -d' ' -f2)"
+	# https://github.com/docker-library/rabbitmq/pull/121#issuecomment-271816323
 
-set -x
-sed -ri \
-	-e 's/^(ENV RABBITMQ_VERSION) .*/\1 '"$rabbitmqVersion"'/' \
-	-e 's/^(ENV RABBITMQ_DEBIAN_VERSION) .*/\1 '"$debianVersion"'/' \
-	*/Dockerfile
+	rabbitmqVersion="${debianVersion%%-*}"
+
+	if [[ "$rabbitmqVersion" != "$version".* ]]; then
+		echo >&2 "warning: $rabbitmqVersion doesn't appear to be $version -- skipping for now"
+		continue
+	fi
+
+	for variant in alpine debian; do
+		(
+			set -x
+			sed -ri \
+				-e 's/^(ENV RABBITMQ_VERSION) .*/\1 '"$rabbitmqVersion"'/' \
+				-e 's/^(ENV RABBITMQ_DEBIAN_VERSION) .*/\1 '"$debianVersion"'/' \
+				"$version/$variant/Dockerfile"
+		)
+
+		travisEnv='\n  - VERSION='"$version"' VARIANT='"$variant$travisEnv"
+	done
+done
+
+travis="$(awk -v 'RS=\n\n' '$1 == "env:" { $0 = "env:'"$travisEnv"'" } { printf "%s%s", $0, RS }' .travis.yml)"
+echo "$travis" > .travis.yml