[FLINK-16260] Change generate-stackbrew-library.sh to support new release.metadata file

generate-stackbrew-library-docker.sh

@@ -1,6 +1,6 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 exec docker run --rm \
     --volume "${PWD}:/build:ro" \
-    plucas/docker-flink-build \
+    rmetzger/git-and-bash:latest \
     /build/generate-stackbrew-library.sh

generate-stackbrew-library.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # This script generates a manifest compatibile with the expectations set forth
 # by docker-library/official-images.
@@ -8,16 +8,9 @@
 
 set -eu
 
-declare -A aliases=(
-    [1.11]='latest'
-)
-
 self="$(basename "$BASH_SOURCE")"
 cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
 
-# Identify directories matching '?.?' (e.g. '1.7') and remove trailing slashes
-versions=( ?.?/ ?.??/ )
-versions=( "${versions[@]%/}" )
 
 # get the most recent commit which modified any of "$@"
 fileCommit() {
@@ -41,21 +34,32 @@ dirCommit() {
     )
 }
 
-getArches() {
-    local repo="$1"; shift
-    local officialImagesUrl='https://github.com/docker-library/official-images/raw/master/library/'
+# Inputs:
+#  - tags: comma-seprated list of image tags
+#  - latestVersion: latest version
+# Output: comma-separated list of tags with "latest" removed if not latest version
+pruneTags() {
+    local inTagsString=$1
+    local latestVersion=$2
+    if [[ $inTagsString =~ $latestVersion ]]; then
+        # tagsString contains latest version. keep "latest" tag
+        echo $inTagsString
+    else
+        # remove "latest" and any "scala_" tag, unless it is the latest version
+        # the "scala_" tag has a similar semantic as the "latest" tag in docker registries. 
+        echo $inTagsString | sed -E 's|,(scala\|latest)[-_[:alnum:]]*||g'
+    fi
+}
 
-    eval "declare -g -A parentRepoToArches=( $(
-        find -name 'Dockerfile' -exec awk '
-                toupper($1) == "FROM" && $2 !~ /^('"$repo"'|scratch|microsoft\/[^:]+)(:|$)/ {
-                    print "'"$officialImagesUrl"'" $2
-                }
-            ' '{}' + \
-            | sort -u \
-            | xargs bashbrew cat --format '[{{ .RepoName }}:{{ .TagName }}]="{{ join " " .TagEntry.Architectures }}"'
-    ) )"
+extractValue() {
+    local key="$1"
+    local file="$2"
+    local line=$(cat $file | grep "$key:")
+    echo $line | cut -d ':' -f 2 | tr -d ' ' # remove key from line, remove whitespace
 }
-getArches 'flink'
+
+# get latest flink version
+latest_version=`ls -1a | grep -E "[0-9]+.[0-9]+" | sort -V -r | head -n 1`
 
 cat <<-EOH
 # this file is generated via https://github.com/apache/flink-docker/blob/$(fileCommit "$self")/$self
@@ -65,105 +69,25 @@ Maintainers: Patrick Lucas <me@patricklucas.com> (@patricklucas),
 GitRepo: https://github.com/apache/flink-docker.git
 EOH
 
-# prints "$2$1$3$1...$N"
-join() {
-    local sep="$1"; shift
-    local out; printf -v out "${sep//%/%%}%s" "$@"
-    echo "${out#$sep}"
-}
-
-# Sorry for the style here, but it makes the nested code easier to read
-for version in "${versions[@]}"; do
-
-# Defaults, can vary between versions
-source_variants=( debian )
-scala_versions=( 2.11 2.12 )
 
-# Version-specific variants (example)
-# if [ "$flink_release" = "x.y" ]; then
-#     scala_versions=( 2.10 2.11 2.12 )
-# fi
-
-for source_variant in "${source_variants[@]}"; do
-for scala_version in "${scala_versions[@]}"; do
-    dir="$version/scala_${scala_version}-${source_variant}"
-
-    # Not all variant combinations may exist
-    [ -f "$dir/Dockerfile" ] || continue
+for dockerfile in $(find . -name "Dockerfile"); do
+    dir=$(dirname $dockerfile)
 
     commit="$(dirCommit "$dir")"
+    metadata="$dir/release.metadata"
+    architectures=$(extractValue "Architectures" $metadata)
+    tags=$(extractValue "Tags" $metadata)
+    tags=$(pruneTags "$tags" $latest_version)
 
-    # Extract the full Flink version from the Dockerfile
-    flink_version="$(git show "$commit":"$dir/Dockerfile" | grep 'dist/flink/flink-[0-9.]*' | cut -d/ -f6 | cut -d- -f2)"
-
-    full_version=$flink_version-scala_$scala_version
-
-    variantParent="$(awk 'toupper($1) == "FROM" { print $2 }' "$dir/Dockerfile")"
-    variantArches="${parentRepoToArches[$variantParent]}"
-
-    # Start with the full version e.g. "1.2.0-scala_2.11" and add
-    # additional tags as relevant
-    tags=( $full_version )
-
-    is_latest_version=
-    [ "$version" = "${versions[-1]}" ] && is_latest_version=1
-
-    is_latest_scala=
-    [ "$scala_version" = "${scala_versions[-1]}" ] && is_latest_scala=1
-
-    add_tags=( $version )
-
-    # Add a scala version tag to each image
-    tags=(
-        ${tags[@]}
-        ${add_tags[@]/%/-scala_$scala_version}
-    )
-
-    # If this is the latest Flink release, add a tag with only the scala version
-    if [ -n "$is_latest_version" ]; then
-        tags=(
-            ${tags[@]}
-            "scala_$scala_version"
-        )
-    fi
-
-    # For the latest supported Scala version, add tags that omit the scala version
-    if [ -n "$is_latest_scala" ]; then
-        tags=(
-            ${tags[@]}
-            $flink_version
-            $version
-        )
-    fi
-
-    # Add -$variant suffix for non-debian-based images
-    if [ "$source_variant" != "debian" ]; then
-        tags=( ${tags[@]/%/-$source_variant} )
-    fi
-
-    # Finally, designate the 'latest' tag (or '$variant', for non-debian-based images)
-    if [ -n "$is_latest_scala" ]; then
-        alias_tag="${aliases[$version]:-}"
-        if [ -n "$alias_tag" ] && [ "$source_variant" != "debian" ]; then
-            alias_tag="$source_variant"
-        fi
-
-        tags=(
-            ${tags[@]}
-            $alias_tag
-        )
-    fi
-
+    # newline
     echo
 
     # The tabs here are necessary for the heredoc to work right
     cat <<-EOE
-		Tags: $(join ', ' "${tags[@]}")
-		Architectures: $(join ', ' $variantArches)
+		Tags: $tags
+		Architectures: $architectures
 		GitCommit: $commit
 		Directory: $dir
 	EOE
 
 done
-done
-done