Implement jq templating

.github/workflows/verify-templating.yml

@@ -0,0 +1,22 @@
+name: Verify Templating
+
+on:
+  pull_request:
+  push:
+
+defaults:
+  run:
+    shell: 'bash -Eeuo pipefail -x {0}'
+
+jobs:
+  apply-templates:
+    name: Check For Uncomitted Changes
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Apply Templates
+        run: ./apply-templates.sh
+      - name: Check Git Status
+        run: |
+          status="$(git status --short)"
+          [ -z "$status" ]

.gitignore

@@ -0,0 +1 @@
+.jq-template.awk

6.0/alpine/Dockerfile → 6.0/alpine3.18/Dockerfile

@@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM alpine:3.18
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added

6.0/Dockerfile → 6.0/bookworm/Dockerfile

@@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM debian:bookworm-slim
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added

6.2/alpine/Dockerfile → 6.2/alpine3.18/Dockerfile

@@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM alpine:3.18
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added

6.2/Dockerfile → 6.2/bookworm/Dockerfile

@@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM debian:bookworm-slim
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added

7.0/alpine/Dockerfile → 7.0/alpine3.18/Dockerfile

@@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM alpine:3.18
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added

7.0/Dockerfile → 7.0/bookworm/Dockerfile

@@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM debian:bookworm-slim
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added

7.2/alpine/Dockerfile → 7.2/alpine3.18/Dockerfile

@@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM alpine:3.18
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added

7.2/Dockerfile → 7.2/bookworm/Dockerfile

@@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM debian:bookworm-slim
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added

Dockerfile-alpine.template

@@ -1,4 +1,4 @@
-FROM alpine:3.18
+FROM alpine:{{ env.variant | ltrimstr("alpine") }}
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
 RUN addgroup -S -g 1000 redis && adduser -S -G redis -u 999 redis
@@ -10,9 +10,9 @@ RUN apk add --no-cache \
 # add tzdata for https://github.com/docker-library/redis/issues/138
 		tzdata
 
-ENV REDIS_VERSION placeholder
-ENV REDIS_DOWNLOAD_URL placeholder
-ENV REDIS_DOWNLOAD_SHA placeholder
+ENV REDIS_VERSION {{ .version }}
+ENV REDIS_DOWNLOAD_URL {{ .downloadUrl }}
+ENV REDIS_DOWNLOAD_SHA {{ .sha256 }}
 
 RUN set -eux; \
 	\

Dockerfile.template

@@ -1,11 +1,11 @@
-FROM debian:bookworm-slim
+FROM debian:{{ env.variant }}-slim
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
 RUN groupadd -r -g 999 redis && useradd -r -g redis -u 999 redis
 
 # grab gosu for easy step-down from root
 # https://github.com/tianon/gosu/releases
-ENV GOSU_VERSION 1.16
+ENV GOSU_VERSION {{ .gosu.version }}
 RUN set -eux; \
 	savedAptMark="$(apt-mark showmanual)"; \
 	apt-get update; \
@@ -26,9 +26,9 @@ RUN set -eux; \
 	gosu --version; \
 	gosu nobody true
 
-ENV REDIS_VERSION placeholder
-ENV REDIS_DOWNLOAD_URL placeholder
-ENV REDIS_DOWNLOAD_SHA placeholder
+ENV REDIS_VERSION {{ .version }}
+ENV REDIS_DOWNLOAD_URL {{ .downloadUrl }}
+ENV REDIS_DOWNLOAD_SHA {{ .sha256 }}
 
 RUN set -eux; \
 	\

apply-templates.sh

@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+[ -f versions.json ] # run "versions.sh" first
+
+cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
+
+jqt='.jq-template.awk'
+if [ -n "${BASHBREW_SCRIPTS:-}" ]; then
+	jqt="$BASHBREW_SCRIPTS/jq-template.awk"
+elif [ "$BASH_SOURCE" -nt "$jqt" ]; then
+	# https://github.com/docker-library/bashbrew/blob/master/scripts/jq-template.awk
+	wget -qO "$jqt" 'https://github.com/docker-library/bashbrew/raw/9f6a35772ac863a0241f147c820354e4008edf38/scripts/jq-template.awk'
+fi
+
+if [ "$#" -eq 0 ]; then
+	versions="$(jq -r 'keys | map(@sh) | join(" ")' versions.json)"
+	eval "set -- $versions"
+fi
+
+generated_warning() {
+	cat <<-EOH
+		#
+		# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+		#
+		# PLEASE DO NOT EDIT IT DIRECTLY.
+		#
+
+	EOH
+}
+
+for version; do
+	export version
+
+	if [ -d "$version" ]; then
+		rm -rf "$version"
+	fi
+
+	if jq -e '.[env.version] | not' versions.json > /dev/null; then
+		echo "skipping $version ..."
+		continue
+	fi
+
+	variants="$(jq -r '.[env.version].variants | map(@sh) | join(" ")' versions.json)"
+	eval "variants=( $variants )"
+
+	for variant in "${variants[@]}"; do
+		export variant
+
+		echo "processing $version/$variant ..."
+
+		dir="$version${variant:+/$variant}"
+
+		mkdir -p "$dir"
+
+		cp -f docker-entrypoint.sh "$dir/"
+
+		case "$variant" in
+			alpine*)
+				template='Dockerfile-alpine.template'
+				sed -i -e 's/gosu/su-exec/g' "$dir/docker-entrypoint.sh"
+				;;
+			*)
+				template='Dockerfile.template'
+				;;
+		esac
+
+		{
+			generated_warning
+			gawk -f "$jqt" "$template"
+		} > "$dir/Dockerfile"
+	done
+done

generate-stackbrew-library.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -eu
 
 declare -A aliases=(
@@ -9,11 +9,13 @@ declare -A aliases=(
 self="$(basename "$BASH_SOURCE")"
 cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
 
-versions=( */ )
-versions=( "${versions[@]%/}" )
+if [ "$#" -eq 0 ]; then
+	versions="$(jq -r 'keys | map(@sh) | join(" ")' versions.json)"
+	eval "set -- $versions"
+fi
 
 # sort version numbers with highest first
-IFS=$'\n'; versions=( $(echo "${versions[*]}" | sort -rV) ); unset IFS
+IFS=$'\n'; set -- $(sort -rV <<<"$*"); unset IFS
 
 # get the most recent commit which modified any of "$@"
 fileCommit() {
@@ -68,51 +70,50 @@ join() {
 	echo "${out#$sep}"
 }
 
-for version in "${versions[@]}"; do
-	for v in \
-		'' alpine \
-	; do
-		dir="$version${v:+/$v}"
-		variant="$(basename "$v")"
+for version; do
+	export version
 
-		[ -f "$dir/Dockerfile" ] || continue
+	variants="$(jq -r '.[env.version].variants | map(@sh) | join(" ")' versions.json)"
+	eval "variants=( $variants )"
 
-		commit="$(dirCommit "$dir")"
+	alpine="$(jq -r '.[env.version].alpine' versions.json)"
+	debian="$(jq -r '.[env.version].debian' versions.json)"
 
-		fullVersion="$(git show "$commit":"$dir/Dockerfile" | awk '$1 == "ENV" && $2 == "REDIS_VERSION" { print $3; exit }')"
-
-		versionAliases=()
-		while [ "$fullVersion" != "$version" -a "${fullVersion%[.]*}" != "$fullVersion" ]; do
-			versionAliases+=( $fullVersion )
-			fullVersion="${fullVersion%[.]*}"
-		done
-		versionAliases+=(
-			$version
-			${aliases[$version]:-}
-		)
-
-		if [ -n "$variant" ]; then
-			variantAliases=( "${versionAliases[@]/%/-$variant}" )
-			variantAliases=( "${variantAliases[@]//latest-/}" )
-		else
-			variantAliases=( "${versionAliases[@]}" )
-		fi
+	fullVersion="$(jq -r '.[env.version].version' versions.json)"
 
-		variantParent="$(awk 'toupper($1) == "FROM" { print $2 }' "$dir/Dockerfile")"
+	versionAliases=()
+	while [ "$fullVersion" != "$version" -a "${fullVersion%[.]*}" != "$fullVersion" ]; do
+		versionAliases+=( $fullVersion )
+		fullVersion="${fullVersion%[.]*}"
+	done
+	versionAliases+=(
+		$version
+		${aliases[$version]:-}
+	)
 
-		suite="${variantParent#*:}" # "jessie-slim", "stretch"
-		suite="${suite%-slim}" # "jessie", "stretch"
-
-		if [ "$v" = 'alpine' ]; then
-			suite="alpine$suite" # "alpine3.8"
-			suiteAliases=( "${versionAliases[@]/%/-$suite}" )
-		else
-			suiteAliases=( "${variantAliases[@]/%/-$suite}" )
-		fi
-		suiteAliases=( "${suiteAliases[@]//latest-/}" )
-		variantAliases+=( "${suiteAliases[@]}" )
+	for variant in "${variants[@]}"; do
+		dir="$version/$variant"
+		commit="$(dirCommit "$dir")"
+
+		variantParent="$(awk 'toupper($1) == "FROM" { print $2 }' "$dir/Dockerfile")"
 		variantArches="${parentRepoToArches[$variantParent]}"
 
+		variantAliases=( "${versionAliases[@]/%/-$variant}" )
+		variantAliases=( "${variantAliases[@]//latest-/}" )
+
+		case "$variant" in
+			"$debian")
+				variantAliases=(
+					"${versionAliases[@]}"
+					"${variantAliases[@]}"
+				)
+				;;
+			alpine"$alpine")
+				variantAliases+=( "${versionAliases[@]/%/-alpine}" )
+				variantAliases=( "${variantAliases[@]//latest-/}" )
+				;;
+		esac
+
 		echo
 		cat <<-EOE
 			Tags: $(join ', ' "${variantAliases[@]}")