Adjust "slim" variants to also include hyper-explicit aliases ("slim-jessie", etc)

generate-stackbrew-library.sh

@@ -91,6 +91,12 @@ for version in "${versions[@]}"; do
 		dir="$version/$v"
 		variant="$(basename "$v")"
 
+		if [ "$variant" = 'slim' ]; then
+			# convert "slim" into "slim-jessie"
+			# https://github.com/docker-library/ruby/pull/142#issuecomment-320012893
+			variant="$variant-$(basename "$(dirname "$v")")"
+		fi
+
 		[ -f "$dir/Dockerfile" ] || continue
 
 		commit="$(dirCommit "$dir")"
@@ -108,11 +114,17 @@ for version in "${versions[@]}"; do
 		)
 
 		variantAliases=( "${versionAliases[@]/%/-$variant}" )
-		if [ "$variant" = "$debianSuite" ]; then
-			variantAliases+=( "${versionAliases[@]}" )
-		elif [ "$variant" = "alpine${alpineVersion}" ]; then
-			variantAliases+=( "${versionAliases[@]/%/-alpine}" )
-		fi
+		case "$variant" in
+			"$debianSuite")
+				variantAliases+=( "${versionAliases[@]}" )
+				;;
+			*-"$debianSuite")
+				variantAliases+=( "${versionAliases[@]/%/-${variant%-$debianSuite}}" )
+				;;
+			"alpine${alpineVersion}")
+				variantAliases+=( "${versionAliases[@]/%/-alpine}" )
+				;;
+		esac
 		variantAliases=( "${variantAliases[@]//latest-/}" )
 
 		case "$v" in