Add proper Architectures entries in "generate-stackbrew-library.sh"

Author: tianon

generate-stackbrew-library.sh

@@ -38,6 +38,22 @@ dirCommit() {
 	)
 }
 
+getArches() {
+	local repo="$1"; shift
+	local officialImagesUrl='https://github.com/docker-library/official-images/raw/master/library/'
+
+	eval "declare -g -A parentRepoToArches=( $(
+		find -name 'Dockerfile' -exec awk '
+				toupper($1) == "FROM" && $2 !~ /^('"$repo"'|scratch|microsoft\/[^:]+)(:|$)/ {
+					print "'"$officialImagesUrl"'" $2
+				}
+			' '{}' + \
+			| sort -u \
+			| xargs bashbrew cat --format '[{{ .RepoName }}:{{ .TagName }}]="{{ join " " .TagEntry.Architectures }}"'
+	) )"
+}
+getArches 'php'
+
 cat <<-EOH
 # this file is generated via https://github.com/docker-library/php/blob/$(fileCommit "$self")/$self
 
@@ -64,37 +80,35 @@ for version in "${versions[@]}"; do
 		${aliases[$version]:-}
 	)
 
-	variant='cli'
-	variantAliases=( "${versionAliases[@]/%/-$variant}" )
-	variantAliases=( "${variantAliases[@]//latest-/}" )
-	variantAliases+=( "${versionAliases[@]}" )
-
-	echo
-	cat <<-EOE
-		Tags: $(join ', ' "${variantAliases[@]}")
-		GitCommit: $commit
-		Directory: $version
-	EOE
-
 	for variant in \
+		'' \
 		alpine \
 		apache \
 		fpm fpm/alpine \
 		zts zts/alpine \
 	; do
-		[ -f "$version/$variant/Dockerfile" ] || continue
+		dir="$version${variant:+/$variant}"
+		[ -f "$dir/Dockerfile" ] || continue
+		variant="${variant:-cli}"
 
-		commit="$(dirCommit "$version/$variant")"
+		commit="$(dirCommit "$dir")"
 
 		slash='/'
 		variantAliases=( "${versionAliases[@]/%/-${variant//$slash/-}}" )
 		variantAliases=( "${variantAliases[@]//latest-/}" )
+		if [ "$variant" = 'cli' ]; then
+			variantAliases+=( "${versionAliases[@]}" )
+		fi
+
+		variantParent="$(awk 'toupper($1) == "FROM" { print $2 }' "$dir/Dockerfile")"
+		variantArches="${parentRepoToArches[$variantParent]}"
 
 		echo
 		cat <<-EOE
 			Tags: $(join ', ' "${variantAliases[@]}")
+			Architectures: $(join ', ' $variantArches)
 			GitCommit: $commit
-			Directory: $version/$variant
+			Directory: $dir
 		EOE
 	done
 done