Add initial jq-based templating engine

2021-11-29 17:39:49 -08:00 · 2021-11-29 17:39:49 -08:00 · cae81400f4
parent 815a93c632
commit cae81400f4
33 changed files with 961 additions and 523 deletions
--- a/.architectures-lib
+++ b/.architectures-lib
@ -1,38 +0,0 @@
-#!/usr/bin/env bash
-
-_awkArch() {
-	local version="$1"; shift
-	local awkExpr="$1"; shift
-	local file="$version/release-architectures"
-	[ -f "$file" ] || file='release-architectures'
-	awk "$@" "/^#|^\$/ { next } $awkExpr" "$file"
-}
-
-dpkgArches() {
-	local version="$1"; shift
-	_awkArch "$version" '{ print $2 }'
-}
-
-hasBashbrewArch() {
-	local version="$1"; shift
-	local bashbrewArch="$1"; shift
-	_awkArch "$version" 'BEGIN { exitCode = 1 } $1 == bashbrewArch { exitCode = 0 } END { exit exitCode }' -v bashbrewArch="$bashbrewArch"
-}
-
-dpkgToBashbrewArch() {
-	local version="$1"; shift
-	local dpkgArch="$1"; shift
-	_awkArch "$version" '$2 == dpkgArch { print $1; exit }' -v dpkgArch="$dpkgArch"
-}
-
-dpkgToJuliaTarArch() {
-	local version="$1"; shift
-	local dpkgArch="$1"; shift
-	_awkArch "$version" '$2 == dpkgArch { print $3; exit }' -v dpkgArch="$dpkgArch"
-}
-
-dpkgToJuliaDirArch() {
-	local version="$1"; shift
-	local dpkgArch="$1"; shift
-	_awkArch "$version" '$2 == dpkgArch { print $4; exit }' -v dpkgArch="$dpkgArch"
-}
--- a/.gitattributes
+++ b/.gitattributes
@ -0,0 +1,2 @@
+/*/**/Dockerfile       linguist-generated
+/Dockerfile*.template  linguist-language=Dockerfile
--- a/.github/workflows/verify-templating.yml
+++ b/.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@v2
+      - name: Apply Templates
+        run: ./apply-templates.sh
+      - name: Check Git Status
+        run: |
+          status="$(git status --short)"
+          [ -z "$status" ]
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1 @@
+.jq-template.awk
--- a/1.0/bullseye/Dockerfile
+++ b/1.0/bullseye/Dockerfile
@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM debian:bullseye-slim

 RUN set -eux; \
@ -33,25 +39,34 @@ RUN set -eux; \
 	\
 # https://julialang.org/downloads/#julia-command-line-version
 # https://julialang-s3.julialang.org/bin/checksums/julia-1.0.5.sha256
-# this "case" statement is generated via "update.sh"
-	dpkgArch="$(dpkg --print-architecture)"; \
-	case "${dpkgArch##*-}" in \
-# amd64
-		amd64) tarArch='x86_64'; dirArch='x64'; sha256='9dedd613777ba6ebd8aee5796915ff50aa6188ea03ed143cb687fc2aefd76b03' ;; \
-# arm32v7
-		armhf) tarArch='armv7l'; dirArch='armv7l'; sha256='cfb2712765db90f0e4fa27e57a88c6d994ebcf1781f8673ebb17b5df7962d0c5' ;; \
-# arm64v8
-		arm64) tarArch='aarch64'; dirArch='aarch64'; sha256='41cea1336ed8861413bb945740e567360e26f241eb3e10b3bb0fccd25655ed28' ;; \
-# i386
-		i386) tarArch='i686'; dirArch='x86'; sha256='67c8f31699b79df96ce95926a363cd24ffa5bb4d9a814e071b1e8c8ff33e5a8f' ;; \
-		*) echo >&2 "error: current architecture ($dpkgArch) does not have a corresponding Julia binary release"; exit 1 ;; \
+	arch="$(dpkg --print-architecture)"; \
+	case "$arch" in \
+		'amd64') \
+			url='https://julialang-s3.julialang.org/bin/linux/x64/1.0/julia-1.0.5-linux-x86_64.tar.gz'; \
+			sha256='9dedd613777ba6ebd8aee5796915ff50aa6188ea03ed143cb687fc2aefd76b03'; \
+			;; \
+		'armhf') \
+			url='https://julialang-s3.julialang.org/bin/linux/armv7l/1.0/julia-1.0.5-linux-armv7l.tar.gz'; \
+			sha256='cfb2712765db90f0e4fa27e57a88c6d994ebcf1781f8673ebb17b5df7962d0c5'; \
+			;; \
+		'arm64') \
+			url='https://julialang-s3.julialang.org/bin/linux/aarch64/1.0/julia-1.0.5-linux-aarch64.tar.gz'; \
+			sha256='41cea1336ed8861413bb945740e567360e26f241eb3e10b3bb0fccd25655ed28'; \
+			;; \
+		'i386') \
+			url='https://julialang-s3.julialang.org/bin/linux/x86/1.0/julia-1.0.5-linux-i686.tar.gz'; \
+			sha256='67c8f31699b79df96ce95926a363cd24ffa5bb4d9a814e071b1e8c8ff33e5a8f'; \
+			;; \
+		*) \
+			echo >&2 "error: current architecture ($arch) does not have a corresponding Julia binary release"; \
+			exit 1; \
+			;; \
 	esac; \
 	\
-	folder="$(echo "$JULIA_VERSION" | cut -d. -f1-2)"; \
-	curl -fL -o julia.tar.gz.asc "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz.asc"; \
-	curl -fL -o julia.tar.gz     "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz"; \
+	curl -fL -o julia.tar.gz.asc "$url.asc"; \
+	curl -fL -o julia.tar.gz "$url"; \
 	\
-	echo "${sha256} *julia.tar.gz" | sha256sum -c -; \
+	echo "$sha256 *julia.tar.gz" | sha256sum --strict --check -; \
 	\
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
--- a/1.0/buster/Dockerfile
+++ b/1.0/buster/Dockerfile
@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM debian:buster-slim

 RUN set -eux; \
@ -33,25 +39,34 @@ RUN set -eux; \
 	\
 # https://julialang.org/downloads/#julia-command-line-version
 # https://julialang-s3.julialang.org/bin/checksums/julia-1.0.5.sha256
-# this "case" statement is generated via "update.sh"
-	dpkgArch="$(dpkg --print-architecture)"; \
-	case "${dpkgArch##*-}" in \
-# amd64
-		amd64) tarArch='x86_64'; dirArch='x64'; sha256='9dedd613777ba6ebd8aee5796915ff50aa6188ea03ed143cb687fc2aefd76b03' ;; \
-# arm32v7
-		armhf) tarArch='armv7l'; dirArch='armv7l'; sha256='cfb2712765db90f0e4fa27e57a88c6d994ebcf1781f8673ebb17b5df7962d0c5' ;; \
-# arm64v8
-		arm64) tarArch='aarch64'; dirArch='aarch64'; sha256='41cea1336ed8861413bb945740e567360e26f241eb3e10b3bb0fccd25655ed28' ;; \
-# i386
-		i386) tarArch='i686'; dirArch='x86'; sha256='67c8f31699b79df96ce95926a363cd24ffa5bb4d9a814e071b1e8c8ff33e5a8f' ;; \
-		*) echo >&2 "error: current architecture ($dpkgArch) does not have a corresponding Julia binary release"; exit 1 ;; \
+	arch="$(dpkg --print-architecture)"; \
+	case "$arch" in \
+		'amd64') \
+			url='https://julialang-s3.julialang.org/bin/linux/x64/1.0/julia-1.0.5-linux-x86_64.tar.gz'; \
+			sha256='9dedd613777ba6ebd8aee5796915ff50aa6188ea03ed143cb687fc2aefd76b03'; \
+			;; \
+		'armhf') \
+			url='https://julialang-s3.julialang.org/bin/linux/armv7l/1.0/julia-1.0.5-linux-armv7l.tar.gz'; \
+			sha256='cfb2712765db90f0e4fa27e57a88c6d994ebcf1781f8673ebb17b5df7962d0c5'; \
+			;; \
+		'arm64') \
+			url='https://julialang-s3.julialang.org/bin/linux/aarch64/1.0/julia-1.0.5-linux-aarch64.tar.gz'; \
+			sha256='41cea1336ed8861413bb945740e567360e26f241eb3e10b3bb0fccd25655ed28'; \
+			;; \
+		'i386') \
+			url='https://julialang-s3.julialang.org/bin/linux/x86/1.0/julia-1.0.5-linux-i686.tar.gz'; \
+			sha256='67c8f31699b79df96ce95926a363cd24ffa5bb4d9a814e071b1e8c8ff33e5a8f'; \
+			;; \
+		*) \
+			echo >&2 "error: current architecture ($arch) does not have a corresponding Julia binary release"; \
+			exit 1; \
+			;; \
 	esac; \
 	\
-	folder="$(echo "$JULIA_VERSION" | cut -d. -f1-2)"; \
-	curl -fL -o julia.tar.gz.asc "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz.asc"; \
-	curl -fL -o julia.tar.gz     "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz"; \
+	curl -fL -o julia.tar.gz.asc "$url.asc"; \
+	curl -fL -o julia.tar.gz "$url"; \
 	\
-	echo "${sha256} *julia.tar.gz" | sha256sum -c -; \
+	echo "$sha256 *julia.tar.gz" | sha256sum --strict --check -; \
 	\
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
--- a/1.0/windows/windowsservercore-1809/Dockerfile
+++ b/1.0/windows/windowsservercore-1809/Dockerfile
@ -1,15 +1,21 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM mcr.microsoft.com/windows/servercore:1809

 # $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

 ENV JULIA_VERSION 1.0.5
+ENV JULIA_URL https://julialang-s3.julialang.org/bin/winnt/x64/1.0/julia-1.0.5-win64.exe
 ENV JULIA_SHA256 83c04bdc264e7ab87f4e22be9f3dff8c5a62a49c8edea6a0c85f4645d4cbac7a

-RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win64.exe' -f $env:JULIA_VERSION, ($env:JULIA_VERSION.Split('.')[0..1] -Join '.')); \
-	Write-Host ('Downloading {0} ...' -f $url); \
+RUN Write-Host ('Downloading {0} ...' -f $env:JULIA_URL); \
 	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $url -OutFile 'julia.exe'; \
+	Invoke-WebRequest -Uri $env:JULIA_URL -OutFile 'julia.exe'; \
 	\
 	Write-Host ('Verifying sha256 ({0}) ...' -f $env:JULIA_SHA256); \
 	if ((Get-FileHash julia.exe -Algorithm sha256).Hash -ne $env:JULIA_SHA256) { \
@ -25,6 +31,9 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 			'/D=C:\julia' \
 		); \
 	\
+	Write-Host 'Removing ...'; \
+	Remove-Item julia.exe -Force; \
+	\
 	Write-Host 'Updating PATH ...'; \
 	$env:PATH = 'C:\julia\bin;' + $env:PATH; \
 	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
@ -32,9 +41,6 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 	Write-Host 'Verifying install ("julia --version") ...'; \
 	julia --version; \
 	\
-	Write-Host 'Removing ...'; \
-	Remove-Item julia.exe -Force; \
-	\
 	Write-Host 'Complete.'

 CMD ["julia"]
--- a/1.0/windows/windowsservercore-ltsc2016/Dockerfile
+++ b/1.0/windows/windowsservercore-ltsc2016/Dockerfile
@ -1,15 +1,21 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM mcr.microsoft.com/windows/servercore:ltsc2016

 # $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

 ENV JULIA_VERSION 1.0.5
+ENV JULIA_URL https://julialang-s3.julialang.org/bin/winnt/x64/1.0/julia-1.0.5-win64.exe
 ENV JULIA_SHA256 83c04bdc264e7ab87f4e22be9f3dff8c5a62a49c8edea6a0c85f4645d4cbac7a

-RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win64.exe' -f $env:JULIA_VERSION, ($env:JULIA_VERSION.Split('.')[0..1] -Join '.')); \
-	Write-Host ('Downloading {0} ...' -f $url); \
+RUN Write-Host ('Downloading {0} ...' -f $env:JULIA_URL); \
 	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $url -OutFile 'julia.exe'; \
+	Invoke-WebRequest -Uri $env:JULIA_URL -OutFile 'julia.exe'; \
 	\
 	Write-Host ('Verifying sha256 ({0}) ...' -f $env:JULIA_SHA256); \
 	if ((Get-FileHash julia.exe -Algorithm sha256).Hash -ne $env:JULIA_SHA256) { \
@ -25,6 +31,9 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 			'/D=C:\julia' \
 		); \
 	\
+	Write-Host 'Removing ...'; \
+	Remove-Item julia.exe -Force; \
+	\
 	Write-Host 'Updating PATH ...'; \
 	$env:PATH = 'C:\julia\bin;' + $env:PATH; \
 	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
@ -32,9 +41,6 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 	Write-Host 'Verifying install ("julia --version") ...'; \
 	julia --version; \
 	\
-	Write-Host 'Removing ...'; \
-	Remove-Item julia.exe -Force; \
-	\
 	Write-Host 'Complete.'

 CMD ["julia"]
--- a/1.0/windows/windowsservercore-ltsc2022/Dockerfile
+++ b/1.0/windows/windowsservercore-ltsc2022/Dockerfile
@ -1,15 +1,21 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM mcr.microsoft.com/windows/servercore:ltsc2022

 # $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

 ENV JULIA_VERSION 1.0.5
+ENV JULIA_URL https://julialang-s3.julialang.org/bin/winnt/x64/1.0/julia-1.0.5-win64.exe
 ENV JULIA_SHA256 83c04bdc264e7ab87f4e22be9f3dff8c5a62a49c8edea6a0c85f4645d4cbac7a

-RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win64.exe' -f $env:JULIA_VERSION, ($env:JULIA_VERSION.Split('.')[0..1] -Join '.')); \
-	Write-Host ('Downloading {0} ...' -f $url); \
+RUN Write-Host ('Downloading {0} ...' -f $env:JULIA_URL); \
 	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $url -OutFile 'julia.exe'; \
+	Invoke-WebRequest -Uri $env:JULIA_URL -OutFile 'julia.exe'; \
 	\
 	Write-Host ('Verifying sha256 ({0}) ...' -f $env:JULIA_SHA256); \
 	if ((Get-FileHash julia.exe -Algorithm sha256).Hash -ne $env:JULIA_SHA256) { \
@ -25,6 +31,9 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 			'/D=C:\julia' \
 		); \
 	\
+	Write-Host 'Removing ...'; \
+	Remove-Item julia.exe -Force; \
+	\
 	Write-Host 'Updating PATH ...'; \
 	$env:PATH = 'C:\julia\bin;' + $env:PATH; \
 	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
@ -32,9 +41,6 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 	Write-Host 'Verifying install ("julia --version") ...'; \
 	julia --version; \
 	\
-	Write-Host 'Removing ...'; \
-	Remove-Item julia.exe -Force; \
-	\
 	Write-Host 'Complete.'

 CMD ["julia"]
--- a/1.6/alpine3.14/Dockerfile
+++ b/1.6/alpine3.14/Dockerfile
@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM alpine:3.14

 ENV JULIA_PATH /usr/local/julia
@ -16,19 +22,22 @@ RUN set -eux; \
 	\
 # https://julialang.org/downloads/#julia-command-line-version
 # https://julialang-s3.julialang.org/bin/checksums/julia-1.6.4.sha256
-# this "case" statement is generated via "update.sh"
-	apkArch="$(apk --print-arch)"; \
-	case "$apkArch" in \
-# amd64
-		x86_64) tarArch='x86_64'; dirArch='x64'; sha256='63f121dffa982ff9b53c7c8a334830e17e2c9d2efa79316a548d29f7f8925e66' ;; \
-		*) echo >&2 "error: current architecture ($apkArch) does not have a corresponding Julia binary release"; exit 1 ;; \
+	arch="$(apk --print-arch)"; \
+	case "$arch" in \
+		'x86_64') \
+			url='https://julialang-s3.julialang.org/bin/musl/x64/1.6/julia-1.6.4-musl-x86_64.tar.gz'; \
+			sha256='63f121dffa982ff9b53c7c8a334830e17e2c9d2efa79316a548d29f7f8925e66'; \
+			;; \
+		*) \
+			echo >&2 "error: current architecture ($arch) does not have a corresponding Julia binary release"; \
+			exit 1; \
+			;; \
 	esac; \
 	\
-	folder="$(echo "$JULIA_VERSION" | cut -d. -f1-2)"; \
-	wget -O julia.tar.gz.asc "https://julialang-s3.julialang.org/bin/musl/${dirArch}/${folder}/julia-${JULIA_VERSION}-musl-${tarArch}.tar.gz.asc"; \
-	wget -O julia.tar.gz     "https://julialang-s3.julialang.org/bin/musl/${dirArch}/${folder}/julia-${JULIA_VERSION}-musl-${tarArch}.tar.gz"; \
+	wget -O julia.tar.gz.asc "$url.asc"; \
+	wget -O julia.tar.gz "$url"; \
 	\
-	echo "${sha256} *julia.tar.gz" | sha256sum -c -; \
+	echo "$sha256 *julia.tar.gz" | sha256sum -w -c -; \
 	\
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
--- a/1.6/alpine3.15/Dockerfile
+++ b/1.6/alpine3.15/Dockerfile
@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM alpine:3.15

 ENV JULIA_PATH /usr/local/julia
@ -16,19 +22,22 @@ RUN set -eux; \
 	\
 # https://julialang.org/downloads/#julia-command-line-version
 # https://julialang-s3.julialang.org/bin/checksums/julia-1.6.4.sha256
-# this "case" statement is generated via "update.sh"
-	apkArch="$(apk --print-arch)"; \
-	case "$apkArch" in \
-# amd64
-		x86_64) tarArch='x86_64'; dirArch='x64'; sha256='63f121dffa982ff9b53c7c8a334830e17e2c9d2efa79316a548d29f7f8925e66' ;; \
-		*) echo >&2 "error: current architecture ($apkArch) does not have a corresponding Julia binary release"; exit 1 ;; \
+	arch="$(apk --print-arch)"; \
+	case "$arch" in \
+		'x86_64') \
+			url='https://julialang-s3.julialang.org/bin/musl/x64/1.6/julia-1.6.4-musl-x86_64.tar.gz'; \
+			sha256='63f121dffa982ff9b53c7c8a334830e17e2c9d2efa79316a548d29f7f8925e66'; \
+			;; \
+		*) \
+			echo >&2 "error: current architecture ($arch) does not have a corresponding Julia binary release"; \
+			exit 1; \
+			;; \
 	esac; \
 	\
-	folder="$(echo "$JULIA_VERSION" | cut -d. -f1-2)"; \
-	wget -O julia.tar.gz.asc "https://julialang-s3.julialang.org/bin/musl/${dirArch}/${folder}/julia-${JULIA_VERSION}-musl-${tarArch}.tar.gz.asc"; \
-	wget -O julia.tar.gz     "https://julialang-s3.julialang.org/bin/musl/${dirArch}/${folder}/julia-${JULIA_VERSION}-musl-${tarArch}.tar.gz"; \
+	wget -O julia.tar.gz.asc "$url.asc"; \
+	wget -O julia.tar.gz "$url"; \
 	\
-	echo "${sha256} *julia.tar.gz" | sha256sum -c -; \
+	echo "$sha256 *julia.tar.gz" | sha256sum -w -c -; \
 	\
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
--- a/1.6/bullseye/Dockerfile
+++ b/1.6/bullseye/Dockerfile
@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM debian:bullseye-slim

 RUN set -eux; \
@ -33,25 +39,34 @@ RUN set -eux; \
 	\
 # https://julialang.org/downloads/#julia-command-line-version
 # https://julialang-s3.julialang.org/bin/checksums/julia-1.6.4.sha256
-# this "case" statement is generated via "update.sh"
-	dpkgArch="$(dpkg --print-architecture)"; \
-	case "${dpkgArch##*-}" in \
-# amd64
-		amd64) tarArch='x86_64'; dirArch='x64'; sha256='52244ae47697e8073dfbc9d1251b0422f0dbd1fbe1a41da4b9f7ddf0506b2132' ;; \
-# arm32v7
-		armhf) tarArch='armv7l'; dirArch='armv7l'; sha256='9ad3f6bd71eb6840d4cef1569855da20c0b4931a2bdf77703a64df672b0702a1' ;; \
-# arm64v8
-		arm64) tarArch='aarch64'; dirArch='aarch64'; sha256='072daac7229c15fa41d0c1b65b8a3d6ee747323d02f5943da3846b075291b48b' ;; \
-# i386
-		i386) tarArch='i686'; dirArch='x86'; sha256='9d43d642174cf22cf0fde18dc2578c84f357d2c619b9d846d3a6da4192ba48cf' ;; \
-		*) echo >&2 "error: current architecture ($dpkgArch) does not have a corresponding Julia binary release"; exit 1 ;; \
+	arch="$(dpkg --print-architecture)"; \
+	case "$arch" in \
+		'amd64') \
+			url='https://julialang-s3.julialang.org/bin/linux/x64/1.6/julia-1.6.4-linux-x86_64.tar.gz'; \
+			sha256='52244ae47697e8073dfbc9d1251b0422f0dbd1fbe1a41da4b9f7ddf0506b2132'; \
+			;; \
+		'armhf') \
+			url='https://julialang-s3.julialang.org/bin/linux/armv7l/1.6/julia-1.6.4-linux-armv7l.tar.gz'; \
+			sha256='9ad3f6bd71eb6840d4cef1569855da20c0b4931a2bdf77703a64df672b0702a1'; \
+			;; \
+		'arm64') \
+			url='https://julialang-s3.julialang.org/bin/linux/aarch64/1.6/julia-1.6.4-linux-aarch64.tar.gz'; \
+			sha256='072daac7229c15fa41d0c1b65b8a3d6ee747323d02f5943da3846b075291b48b'; \
+			;; \
+		'i386') \
+			url='https://julialang-s3.julialang.org/bin/linux/x86/1.6/julia-1.6.4-linux-i686.tar.gz'; \
+			sha256='9d43d642174cf22cf0fde18dc2578c84f357d2c619b9d846d3a6da4192ba48cf'; \
+			;; \
+		*) \
+			echo >&2 "error: current architecture ($arch) does not have a corresponding Julia binary release"; \
+			exit 1; \
+			;; \
 	esac; \
 	\
-	folder="$(echo "$JULIA_VERSION" | cut -d. -f1-2)"; \
-	curl -fL -o julia.tar.gz.asc "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz.asc"; \
-	curl -fL -o julia.tar.gz     "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz"; \
+	curl -fL -o julia.tar.gz.asc "$url.asc"; \
+	curl -fL -o julia.tar.gz "$url"; \
 	\
-	echo "${sha256} *julia.tar.gz" | sha256sum -c -; \
+	echo "$sha256 *julia.tar.gz" | sha256sum --strict --check -; \
 	\
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
--- a/1.6/buster/Dockerfile
+++ b/1.6/buster/Dockerfile
@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM debian:buster-slim

 RUN set -eux; \
@ -33,25 +39,34 @@ RUN set -eux; \
 	\
 # https://julialang.org/downloads/#julia-command-line-version
 # https://julialang-s3.julialang.org/bin/checksums/julia-1.6.4.sha256
-# this "case" statement is generated via "update.sh"
-	dpkgArch="$(dpkg --print-architecture)"; \
-	case "${dpkgArch##*-}" in \
-# amd64
-		amd64) tarArch='x86_64'; dirArch='x64'; sha256='52244ae47697e8073dfbc9d1251b0422f0dbd1fbe1a41da4b9f7ddf0506b2132' ;; \
-# arm32v7
-		armhf) tarArch='armv7l'; dirArch='armv7l'; sha256='9ad3f6bd71eb6840d4cef1569855da20c0b4931a2bdf77703a64df672b0702a1' ;; \
-# arm64v8
-		arm64) tarArch='aarch64'; dirArch='aarch64'; sha256='072daac7229c15fa41d0c1b65b8a3d6ee747323d02f5943da3846b075291b48b' ;; \
-# i386
-		i386) tarArch='i686'; dirArch='x86'; sha256='9d43d642174cf22cf0fde18dc2578c84f357d2c619b9d846d3a6da4192ba48cf' ;; \
-		*) echo >&2 "error: current architecture ($dpkgArch) does not have a corresponding Julia binary release"; exit 1 ;; \
+	arch="$(dpkg --print-architecture)"; \
+	case "$arch" in \
+		'amd64') \
+			url='https://julialang-s3.julialang.org/bin/linux/x64/1.6/julia-1.6.4-linux-x86_64.tar.gz'; \
+			sha256='52244ae47697e8073dfbc9d1251b0422f0dbd1fbe1a41da4b9f7ddf0506b2132'; \
+			;; \
+		'armhf') \
+			url='https://julialang-s3.julialang.org/bin/linux/armv7l/1.6/julia-1.6.4-linux-armv7l.tar.gz'; \
+			sha256='9ad3f6bd71eb6840d4cef1569855da20c0b4931a2bdf77703a64df672b0702a1'; \
+			;; \
+		'arm64') \
+			url='https://julialang-s3.julialang.org/bin/linux/aarch64/1.6/julia-1.6.4-linux-aarch64.tar.gz'; \
+			sha256='072daac7229c15fa41d0c1b65b8a3d6ee747323d02f5943da3846b075291b48b'; \
+			;; \
+		'i386') \
+			url='https://julialang-s3.julialang.org/bin/linux/x86/1.6/julia-1.6.4-linux-i686.tar.gz'; \
+			sha256='9d43d642174cf22cf0fde18dc2578c84f357d2c619b9d846d3a6da4192ba48cf'; \
+			;; \
+		*) \
+			echo >&2 "error: current architecture ($arch) does not have a corresponding Julia binary release"; \
+			exit 1; \
+			;; \
 	esac; \
 	\
-	folder="$(echo "$JULIA_VERSION" | cut -d. -f1-2)"; \
-	curl -fL -o julia.tar.gz.asc "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz.asc"; \
-	curl -fL -o julia.tar.gz     "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz"; \
+	curl -fL -o julia.tar.gz.asc "$url.asc"; \
+	curl -fL -o julia.tar.gz "$url"; \
 	\
-	echo "${sha256} *julia.tar.gz" | sha256sum -c -; \
+	echo "$sha256 *julia.tar.gz" | sha256sum --strict --check -; \
 	\
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
--- a/1.6/windows/windowsservercore-1809/Dockerfile
+++ b/1.6/windows/windowsservercore-1809/Dockerfile
@ -1,15 +1,21 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM mcr.microsoft.com/windows/servercore:1809

 # $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

 ENV JULIA_VERSION 1.6.4
+ENV JULIA_URL https://julialang-s3.julialang.org/bin/winnt/x64/1.6/julia-1.6.4-win64.exe
 ENV JULIA_SHA256 c9b6ecdad4feb57e5af12c9ef1a74993a96edbf87a4dc521d57e338397cee9b2

-RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win64.exe' -f $env:JULIA_VERSION, ($env:JULIA_VERSION.Split('.')[0..1] -Join '.')); \
-	Write-Host ('Downloading {0} ...' -f $url); \
+RUN Write-Host ('Downloading {0} ...' -f $env:JULIA_URL); \
 	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $url -OutFile 'julia.exe'; \
+	Invoke-WebRequest -Uri $env:JULIA_URL -OutFile 'julia.exe'; \
 	\
 	Write-Host ('Verifying sha256 ({0}) ...' -f $env:JULIA_SHA256); \
 	if ((Get-FileHash julia.exe -Algorithm sha256).Hash -ne $env:JULIA_SHA256) { \
@ -25,6 +31,9 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 			'/DIR=C:\julia' \
 		); \
 	\
+	Write-Host 'Removing ...'; \
+	Remove-Item julia.exe -Force; \
+	\
 	Write-Host 'Updating PATH ...'; \
 	$env:PATH = 'C:\julia\bin;' + $env:PATH; \
 	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
@ -32,9 +41,6 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 	Write-Host 'Verifying install ("julia --version") ...'; \
 	julia --version; \
 	\
-	Write-Host 'Removing ...'; \
-	Remove-Item julia.exe -Force; \
-	\
 	Write-Host 'Complete.'

 CMD ["julia"]
--- a/1.6/windows/windowsservercore-ltsc2016/Dockerfile
+++ b/1.6/windows/windowsservercore-ltsc2016/Dockerfile
@ -1,15 +1,21 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM mcr.microsoft.com/windows/servercore:ltsc2016

 # $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

 ENV JULIA_VERSION 1.6.4
+ENV JULIA_URL https://julialang-s3.julialang.org/bin/winnt/x64/1.6/julia-1.6.4-win64.exe
 ENV JULIA_SHA256 c9b6ecdad4feb57e5af12c9ef1a74993a96edbf87a4dc521d57e338397cee9b2

-RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win64.exe' -f $env:JULIA_VERSION, ($env:JULIA_VERSION.Split('.')[0..1] -Join '.')); \
-	Write-Host ('Downloading {0} ...' -f $url); \
+RUN Write-Host ('Downloading {0} ...' -f $env:JULIA_URL); \
 	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $url -OutFile 'julia.exe'; \
+	Invoke-WebRequest -Uri $env:JULIA_URL -OutFile 'julia.exe'; \
 	\
 	Write-Host ('Verifying sha256 ({0}) ...' -f $env:JULIA_SHA256); \
 	if ((Get-FileHash julia.exe -Algorithm sha256).Hash -ne $env:JULIA_SHA256) { \
@ -25,6 +31,9 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 			'/DIR=C:\julia' \
 		); \
 	\
+	Write-Host 'Removing ...'; \
+	Remove-Item julia.exe -Force; \
+	\
 	Write-Host 'Updating PATH ...'; \
 	$env:PATH = 'C:\julia\bin;' + $env:PATH; \
 	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
@ -32,9 +41,6 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 	Write-Host 'Verifying install ("julia --version") ...'; \
 	julia --version; \
 	\
-	Write-Host 'Removing ...'; \
-	Remove-Item julia.exe -Force; \
-	\
 	Write-Host 'Complete.'

 CMD ["julia"]
--- a/1.6/windows/windowsservercore-ltsc2022/Dockerfile
+++ b/1.6/windows/windowsservercore-ltsc2022/Dockerfile
@ -1,15 +1,21 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM mcr.microsoft.com/windows/servercore:ltsc2022

 # $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

 ENV JULIA_VERSION 1.6.4
+ENV JULIA_URL https://julialang-s3.julialang.org/bin/winnt/x64/1.6/julia-1.6.4-win64.exe
 ENV JULIA_SHA256 c9b6ecdad4feb57e5af12c9ef1a74993a96edbf87a4dc521d57e338397cee9b2

-RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win64.exe' -f $env:JULIA_VERSION, ($env:JULIA_VERSION.Split('.')[0..1] -Join '.')); \
-	Write-Host ('Downloading {0} ...' -f $url); \
+RUN Write-Host ('Downloading {0} ...' -f $env:JULIA_URL); \
 	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $url -OutFile 'julia.exe'; \
+	Invoke-WebRequest -Uri $env:JULIA_URL -OutFile 'julia.exe'; \
 	\
 	Write-Host ('Verifying sha256 ({0}) ...' -f $env:JULIA_SHA256); \
 	if ((Get-FileHash julia.exe -Algorithm sha256).Hash -ne $env:JULIA_SHA256) { \
@ -25,6 +31,9 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 			'/DIR=C:\julia' \
 		); \
 	\
+	Write-Host 'Removing ...'; \
+	Remove-Item julia.exe -Force; \
+	\
 	Write-Host 'Updating PATH ...'; \
 	$env:PATH = 'C:\julia\bin;' + $env:PATH; \
 	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
@ -32,9 +41,6 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 	Write-Host 'Verifying install ("julia --version") ...'; \
 	julia --version; \
 	\
-	Write-Host 'Removing ...'; \
-	Remove-Item julia.exe -Force; \
-	\
 	Write-Host 'Complete.'

 CMD ["julia"]
--- a/1.7-rc/alpine3.14/Dockerfile
+++ b/1.7-rc/alpine3.14/Dockerfile
@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM alpine:3.14

 ENV JULIA_PATH /usr/local/julia
@ -16,19 +22,22 @@ RUN set -eux; \
 	\
 # https://julialang.org/downloads/#julia-command-line-version
 # https://julialang-s3.julialang.org/bin/checksums/julia-1.7.0-rc3.sha256
-# this "case" statement is generated via "update.sh"
-	apkArch="$(apk --print-arch)"; \
-	case "$apkArch" in \
-# amd64
-		x86_64) tarArch='x86_64'; dirArch='x64'; sha256='68dc3d7b17fbcceea383b48d82c63c36b899e05f5cd7537a730d7578f65c40ea' ;; \
-		*) echo >&2 "error: current architecture ($apkArch) does not have a corresponding Julia binary release"; exit 1 ;; \
+	arch="$(apk --print-arch)"; \
+	case "$arch" in \
+		'x86_64') \
+			url='https://julialang-s3.julialang.org/bin/musl/x64/1.7/julia-1.7.0-rc3-musl-x86_64.tar.gz'; \
+			sha256='68dc3d7b17fbcceea383b48d82c63c36b899e05f5cd7537a730d7578f65c40ea'; \
+			;; \
+		*) \
+			echo >&2 "error: current architecture ($arch) does not have a corresponding Julia binary release"; \
+			exit 1; \
+			;; \
 	esac; \
 	\
-	folder="$(echo "$JULIA_VERSION" | cut -d. -f1-2)"; \
-	wget -O julia.tar.gz.asc "https://julialang-s3.julialang.org/bin/musl/${dirArch}/${folder}/julia-${JULIA_VERSION}-musl-${tarArch}.tar.gz.asc"; \
-	wget -O julia.tar.gz     "https://julialang-s3.julialang.org/bin/musl/${dirArch}/${folder}/julia-${JULIA_VERSION}-musl-${tarArch}.tar.gz"; \
+	wget -O julia.tar.gz.asc "$url.asc"; \
+	wget -O julia.tar.gz "$url"; \
 	\
-	echo "${sha256} *julia.tar.gz" | sha256sum -c -; \
+	echo "$sha256 *julia.tar.gz" | sha256sum -w -c -; \
 	\
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
--- a/1.7-rc/alpine3.15/Dockerfile
+++ b/1.7-rc/alpine3.15/Dockerfile
@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM alpine:3.15

 ENV JULIA_PATH /usr/local/julia
@ -16,19 +22,22 @@ RUN set -eux; \
 	\
 # https://julialang.org/downloads/#julia-command-line-version
 # https://julialang-s3.julialang.org/bin/checksums/julia-1.7.0-rc3.sha256
-# this "case" statement is generated via "update.sh"
-	apkArch="$(apk --print-arch)"; \
-	case "$apkArch" in \
-# amd64
-		x86_64) tarArch='x86_64'; dirArch='x64'; sha256='68dc3d7b17fbcceea383b48d82c63c36b899e05f5cd7537a730d7578f65c40ea' ;; \
-		*) echo >&2 "error: current architecture ($apkArch) does not have a corresponding Julia binary release"; exit 1 ;; \
+	arch="$(apk --print-arch)"; \
+	case "$arch" in \
+		'x86_64') \
+			url='https://julialang-s3.julialang.org/bin/musl/x64/1.7/julia-1.7.0-rc3-musl-x86_64.tar.gz'; \
+			sha256='68dc3d7b17fbcceea383b48d82c63c36b899e05f5cd7537a730d7578f65c40ea'; \
+			;; \
+		*) \
+			echo >&2 "error: current architecture ($arch) does not have a corresponding Julia binary release"; \
+			exit 1; \
+			;; \
 	esac; \
 	\
-	folder="$(echo "$JULIA_VERSION" | cut -d. -f1-2)"; \
-	wget -O julia.tar.gz.asc "https://julialang-s3.julialang.org/bin/musl/${dirArch}/${folder}/julia-${JULIA_VERSION}-musl-${tarArch}.tar.gz.asc"; \
-	wget -O julia.tar.gz     "https://julialang-s3.julialang.org/bin/musl/${dirArch}/${folder}/julia-${JULIA_VERSION}-musl-${tarArch}.tar.gz"; \
+	wget -O julia.tar.gz.asc "$url.asc"; \
+	wget -O julia.tar.gz "$url"; \
 	\
-	echo "${sha256} *julia.tar.gz" | sha256sum -c -; \
+	echo "$sha256 *julia.tar.gz" | sha256sum -w -c -; \
 	\
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
--- a/1.7-rc/bullseye/Dockerfile
+++ b/1.7-rc/bullseye/Dockerfile
@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM debian:bullseye-slim

 RUN set -eux; \
@ -33,25 +39,34 @@ RUN set -eux; \
 	\
 # https://julialang.org/downloads/#julia-command-line-version
 # https://julialang-s3.julialang.org/bin/checksums/julia-1.7.0-rc3.sha256
-# this "case" statement is generated via "update.sh"
-	dpkgArch="$(dpkg --print-architecture)"; \
-	case "${dpkgArch##*-}" in \
-# amd64
-		amd64) tarArch='x86_64'; dirArch='x64'; sha256='cbf33c533d6f226161f08cdc3cec16745a3dc5afdfbaece95e3f2a5e0b6b7886' ;; \
-# arm32v7
-		armhf) tarArch='armv7l'; dirArch='armv7l'; sha256='fff9370f58fd8f94f12a14d38c32d25b9e493d62a6d992edfc378caf9ef8d1cc' ;; \
-# arm64v8
-		arm64) tarArch='aarch64'; dirArch='aarch64'; sha256='0662f9f31c87559ec33a24b3b83df85071357708287678ca78c7fa4498d05e5c' ;; \
-# i386
-		i386) tarArch='i686'; dirArch='x86'; sha256='9ee7692faee05d7dbe431c59850542d95d260368bbf6d4f0ccdd03be07fef817' ;; \
-		*) echo >&2 "error: current architecture ($dpkgArch) does not have a corresponding Julia binary release"; exit 1 ;; \
+	arch="$(dpkg --print-architecture)"; \
+	case "$arch" in \
+		'amd64') \
+			url='https://julialang-s3.julialang.org/bin/linux/x64/1.7/julia-1.7.0-rc3-linux-x86_64.tar.gz'; \
+			sha256='cbf33c533d6f226161f08cdc3cec16745a3dc5afdfbaece95e3f2a5e0b6b7886'; \
+			;; \
+		'armhf') \
+			url='https://julialang-s3.julialang.org/bin/linux/armv7l/1.7/julia-1.7.0-rc3-linux-armv7l.tar.gz'; \
+			sha256='fff9370f58fd8f94f12a14d38c32d25b9e493d62a6d992edfc378caf9ef8d1cc'; \
+			;; \
+		'arm64') \
+			url='https://julialang-s3.julialang.org/bin/linux/aarch64/1.7/julia-1.7.0-rc3-linux-aarch64.tar.gz'; \
+			sha256='0662f9f31c87559ec33a24b3b83df85071357708287678ca78c7fa4498d05e5c'; \
+			;; \
+		'i386') \
+			url='https://julialang-s3.julialang.org/bin/linux/x86/1.7/julia-1.7.0-rc3-linux-i686.tar.gz'; \
+			sha256='9ee7692faee05d7dbe431c59850542d95d260368bbf6d4f0ccdd03be07fef817'; \
+			;; \
+		*) \
+			echo >&2 "error: current architecture ($arch) does not have a corresponding Julia binary release"; \
+			exit 1; \
+			;; \
 	esac; \
 	\
-	folder="$(echo "$JULIA_VERSION" | cut -d. -f1-2)"; \
-	curl -fL -o julia.tar.gz.asc "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz.asc"; \
-	curl -fL -o julia.tar.gz     "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz"; \
+	curl -fL -o julia.tar.gz.asc "$url.asc"; \
+	curl -fL -o julia.tar.gz "$url"; \
 	\
-	echo "${sha256} *julia.tar.gz" | sha256sum -c -; \
+	echo "$sha256 *julia.tar.gz" | sha256sum --strict --check -; \
 	\
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
--- a/1.7-rc/buster/Dockerfile
+++ b/1.7-rc/buster/Dockerfile
@ -1,3 +1,9 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM debian:buster-slim

 RUN set -eux; \
@ -33,25 +39,34 @@ RUN set -eux; \
 	\
 # https://julialang.org/downloads/#julia-command-line-version
 # https://julialang-s3.julialang.org/bin/checksums/julia-1.7.0-rc3.sha256
-# this "case" statement is generated via "update.sh"
-	dpkgArch="$(dpkg --print-architecture)"; \
-	case "${dpkgArch##*-}" in \
-# amd64
-		amd64) tarArch='x86_64'; dirArch='x64'; sha256='cbf33c533d6f226161f08cdc3cec16745a3dc5afdfbaece95e3f2a5e0b6b7886' ;; \
-# arm32v7
-		armhf) tarArch='armv7l'; dirArch='armv7l'; sha256='fff9370f58fd8f94f12a14d38c32d25b9e493d62a6d992edfc378caf9ef8d1cc' ;; \
-# arm64v8
-		arm64) tarArch='aarch64'; dirArch='aarch64'; sha256='0662f9f31c87559ec33a24b3b83df85071357708287678ca78c7fa4498d05e5c' ;; \
-# i386
-		i386) tarArch='i686'; dirArch='x86'; sha256='9ee7692faee05d7dbe431c59850542d95d260368bbf6d4f0ccdd03be07fef817' ;; \
-		*) echo >&2 "error: current architecture ($dpkgArch) does not have a corresponding Julia binary release"; exit 1 ;; \
+	arch="$(dpkg --print-architecture)"; \
+	case "$arch" in \
+		'amd64') \
+			url='https://julialang-s3.julialang.org/bin/linux/x64/1.7/julia-1.7.0-rc3-linux-x86_64.tar.gz'; \
+			sha256='cbf33c533d6f226161f08cdc3cec16745a3dc5afdfbaece95e3f2a5e0b6b7886'; \
+			;; \
+		'armhf') \
+			url='https://julialang-s3.julialang.org/bin/linux/armv7l/1.7/julia-1.7.0-rc3-linux-armv7l.tar.gz'; \
+			sha256='fff9370f58fd8f94f12a14d38c32d25b9e493d62a6d992edfc378caf9ef8d1cc'; \
+			;; \
+		'arm64') \
+			url='https://julialang-s3.julialang.org/bin/linux/aarch64/1.7/julia-1.7.0-rc3-linux-aarch64.tar.gz'; \
+			sha256='0662f9f31c87559ec33a24b3b83df85071357708287678ca78c7fa4498d05e5c'; \
+			;; \
+		'i386') \
+			url='https://julialang-s3.julialang.org/bin/linux/x86/1.7/julia-1.7.0-rc3-linux-i686.tar.gz'; \
+			sha256='9ee7692faee05d7dbe431c59850542d95d260368bbf6d4f0ccdd03be07fef817'; \
+			;; \
+		*) \
+			echo >&2 "error: current architecture ($arch) does not have a corresponding Julia binary release"; \
+			exit 1; \
+			;; \
 	esac; \
 	\
-	folder="$(echo "$JULIA_VERSION" | cut -d. -f1-2)"; \
-	curl -fL -o julia.tar.gz.asc "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz.asc"; \
-	curl -fL -o julia.tar.gz     "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz"; \
+	curl -fL -o julia.tar.gz.asc "$url.asc"; \
+	curl -fL -o julia.tar.gz "$url"; \
 	\
-	echo "${sha256} *julia.tar.gz" | sha256sum -c -; \
+	echo "$sha256 *julia.tar.gz" | sha256sum --strict --check -; \
 	\
 	export GNUPGHOME="$(mktemp -d)"; \
 	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
--- a/1.7-rc/windows/windowsservercore-1809/Dockerfile
+++ b/1.7-rc/windows/windowsservercore-1809/Dockerfile
@ -1,15 +1,21 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM mcr.microsoft.com/windows/servercore:1809

 # $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

 ENV JULIA_VERSION 1.7.0-rc3
+ENV JULIA_URL https://julialang-s3.julialang.org/bin/winnt/x64/1.7/julia-1.7.0-rc3-win64.exe
 ENV JULIA_SHA256 d48563b3faeeb0d937177f989f5c8bfe79552ac11255000870ce770a97c69de8

-RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win64.exe' -f $env:JULIA_VERSION, ($env:JULIA_VERSION.Split('.')[0..1] -Join '.')); \
-	Write-Host ('Downloading {0} ...' -f $url); \
+RUN Write-Host ('Downloading {0} ...' -f $env:JULIA_URL); \
 	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $url -OutFile 'julia.exe'; \
+	Invoke-WebRequest -Uri $env:JULIA_URL -OutFile 'julia.exe'; \
 	\
 	Write-Host ('Verifying sha256 ({0}) ...' -f $env:JULIA_SHA256); \
 	if ((Get-FileHash julia.exe -Algorithm sha256).Hash -ne $env:JULIA_SHA256) { \
@ -25,6 +31,9 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 			'/DIR=C:\julia' \
 		); \
 	\
+	Write-Host 'Removing ...'; \
+	Remove-Item julia.exe -Force; \
+	\
 	Write-Host 'Updating PATH ...'; \
 	$env:PATH = 'C:\julia\bin;' + $env:PATH; \
 	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
@ -32,9 +41,6 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 	Write-Host 'Verifying install ("julia --version") ...'; \
 	julia --version; \
 	\
-	Write-Host 'Removing ...'; \
-	Remove-Item julia.exe -Force; \
-	\
 	Write-Host 'Complete.'

 CMD ["julia"]
--- a/1.7-rc/windows/windowsservercore-ltsc2016/Dockerfile
+++ b/1.7-rc/windows/windowsservercore-ltsc2016/Dockerfile
@ -1,15 +1,21 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM mcr.microsoft.com/windows/servercore:ltsc2016

 # $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

 ENV JULIA_VERSION 1.7.0-rc3
+ENV JULIA_URL https://julialang-s3.julialang.org/bin/winnt/x64/1.7/julia-1.7.0-rc3-win64.exe
 ENV JULIA_SHA256 d48563b3faeeb0d937177f989f5c8bfe79552ac11255000870ce770a97c69de8

-RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win64.exe' -f $env:JULIA_VERSION, ($env:JULIA_VERSION.Split('.')[0..1] -Join '.')); \
-	Write-Host ('Downloading {0} ...' -f $url); \
+RUN Write-Host ('Downloading {0} ...' -f $env:JULIA_URL); \
 	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $url -OutFile 'julia.exe'; \
+	Invoke-WebRequest -Uri $env:JULIA_URL -OutFile 'julia.exe'; \
 	\
 	Write-Host ('Verifying sha256 ({0}) ...' -f $env:JULIA_SHA256); \
 	if ((Get-FileHash julia.exe -Algorithm sha256).Hash -ne $env:JULIA_SHA256) { \
@ -25,6 +31,9 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 			'/DIR=C:\julia' \
 		); \
 	\
+	Write-Host 'Removing ...'; \
+	Remove-Item julia.exe -Force; \
+	\
 	Write-Host 'Updating PATH ...'; \
 	$env:PATH = 'C:\julia\bin;' + $env:PATH; \
 	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
@ -32,9 +41,6 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 	Write-Host 'Verifying install ("julia --version") ...'; \
 	julia --version; \
 	\
-	Write-Host 'Removing ...'; \
-	Remove-Item julia.exe -Force; \
-	\
 	Write-Host 'Complete.'

 CMD ["julia"]
--- a/1.7-rc/windows/windowsservercore-ltsc2022/Dockerfile
+++ b/1.7-rc/windows/windowsservercore-ltsc2022/Dockerfile
@ -1,15 +1,21 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
 FROM mcr.microsoft.com/windows/servercore:ltsc2022

 # $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

 ENV JULIA_VERSION 1.7.0-rc3
+ENV JULIA_URL https://julialang-s3.julialang.org/bin/winnt/x64/1.7/julia-1.7.0-rc3-win64.exe
 ENV JULIA_SHA256 d48563b3faeeb0d937177f989f5c8bfe79552ac11255000870ce770a97c69de8

-RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win64.exe' -f $env:JULIA_VERSION, ($env:JULIA_VERSION.Split('.')[0..1] -Join '.')); \
-	Write-Host ('Downloading {0} ...' -f $url); \
+RUN Write-Host ('Downloading {0} ...' -f $env:JULIA_URL); \
 	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $url -OutFile 'julia.exe'; \
+	Invoke-WebRequest -Uri $env:JULIA_URL -OutFile 'julia.exe'; \
 	\
 	Write-Host ('Verifying sha256 ({0}) ...' -f $env:JULIA_SHA256); \
 	if ((Get-FileHash julia.exe -Algorithm sha256).Hash -ne $env:JULIA_SHA256) { \
@ -25,6 +31,9 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 			'/DIR=C:\julia' \
 		); \
 	\
+	Write-Host 'Removing ...'; \
+	Remove-Item julia.exe -Force; \
+	\
 	Write-Host 'Updating PATH ...'; \
 	$env:PATH = 'C:\julia\bin;' + $env:PATH; \
 	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
@ -32,9 +41,6 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 	Write-Host 'Verifying install ("julia --version") ...'; \
 	julia --version; \
 	\
-	Write-Host 'Removing ...'; \
-	Remove-Item julia.exe -Force; \
-	\
 	Write-Host 'Complete.'

 CMD ["julia"]
--- a/Dockerfile-alpine.template
+++ b/Dockerfile-alpine.template
@ -1,43 +0,0 @@
-FROM alpine:%%TAG%%
-
-ENV JULIA_PATH /usr/local/julia
-ENV PATH $JULIA_PATH/bin:$PATH
-
-# https://julialang.org/juliareleases.asc
-# Julia (Binary signing key) <buildbot@julialang.org>
-ENV JULIA_GPG 3673DF529D9049477F76B37566E3C7DC03D6E495
-
-# https://julialang.org/downloads/
-ENV JULIA_VERSION %%JULIA_VERSION%%
-
-RUN set -eux; \
-	\
-	apk add --no-cache --virtual .fetch-deps gnupg; \
-	\
-# https://julialang.org/downloads/#julia-command-line-version
-# https://julialang-s3.julialang.org/bin/checksums/julia-%%JULIA_VERSION%%.sha256
-# this "case" statement is generated via "update.sh"
-	%%ARCH-CASE%%; \
-	\
-	folder="$(echo "$JULIA_VERSION" | cut -d. -f1-2)"; \
-	wget -O julia.tar.gz.asc "https://julialang-s3.julialang.org/bin/musl/${dirArch}/${folder}/julia-${JULIA_VERSION}-musl-${tarArch}.tar.gz.asc"; \
-	wget -O julia.tar.gz     "https://julialang-s3.julialang.org/bin/musl/${dirArch}/${folder}/julia-${JULIA_VERSION}-musl-${tarArch}.tar.gz"; \
-	\
-	echo "${sha256} *julia.tar.gz" | sha256sum -c -; \
-	\
-	export GNUPGHOME="$(mktemp -d)"; \
-	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
-	gpg --batch --verify julia.tar.gz.asc julia.tar.gz; \
-	command -v gpgconf > /dev/null && gpgconf --kill all; \
-	rm -rf "$GNUPGHOME" julia.tar.gz.asc; \
-	\
-	mkdir "$JULIA_PATH"; \
-	tar -xzf julia.tar.gz -C "$JULIA_PATH" --strip-components 1; \
-	rm julia.tar.gz; \
-	\
-	apk del --no-network .fetch-deps; \
-	\
-# smoke test
-	julia --version
-
-CMD ["julia"]
--- a/Dockerfile-debian.template
+++ b/Dockerfile-debian.template
@ -1,62 +0,0 @@
-FROM debian:%%TAG%%
-
-RUN set -eux; \
-	apt-get update; \
-	apt-get install -y --no-install-recommends \
-		ca-certificates \
-# ERROR: no download agent available; install curl, wget, or fetch
-		curl \
-	; \
-	rm -rf /var/lib/apt/lists/*
-
-ENV JULIA_PATH /usr/local/julia
-ENV PATH $JULIA_PATH/bin:$PATH
-
-# https://julialang.org/juliareleases.asc
-# Julia (Binary signing key) <buildbot@julialang.org>
-ENV JULIA_GPG 3673DF529D9049477F76B37566E3C7DC03D6E495
-
-# https://julialang.org/downloads/
-ENV JULIA_VERSION %%JULIA_VERSION%%
-
-RUN set -eux; \
-	\
-	savedAptMark="$(apt-mark showmanual)"; \
-	if ! command -v gpg > /dev/null; then \
-		apt-get update; \
-		apt-get install -y --no-install-recommends \
-			gnupg \
-			dirmngr \
-		; \
-		rm -rf /var/lib/apt/lists/*; \
-	fi; \
-	\
-# https://julialang.org/downloads/#julia-command-line-version
-# https://julialang-s3.julialang.org/bin/checksums/julia-%%JULIA_VERSION%%.sha256
-# this "case" statement is generated via "update.sh"
-	%%ARCH-CASE%%; \
-	\
-	folder="$(echo "$JULIA_VERSION" | cut -d. -f1-2)"; \
-	curl -fL -o julia.tar.gz.asc "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz.asc"; \
-	curl -fL -o julia.tar.gz     "https://julialang-s3.julialang.org/bin/linux/${dirArch}/${folder}/julia-${JULIA_VERSION}-linux-${tarArch}.tar.gz"; \
-	\
-	echo "${sha256} *julia.tar.gz" | sha256sum -c -; \
-	\
-	export GNUPGHOME="$(mktemp -d)"; \
-	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
-	gpg --batch --verify julia.tar.gz.asc julia.tar.gz; \
-	command -v gpgconf > /dev/null && gpgconf --kill all; \
-	rm -rf "$GNUPGHOME" julia.tar.gz.asc; \
-	\
-	mkdir "$JULIA_PATH"; \
-	tar -xzf julia.tar.gz -C "$JULIA_PATH" --strip-components 1; \
-	rm julia.tar.gz; \
-	\
-	apt-mark auto '.*' > /dev/null; \
-	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
-	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
-	\
-# smoke test
-	julia --version
-
-CMD ["julia"]
--- a/Dockerfile-linux.template
+++ b/Dockerfile-linux.template
@ -0,0 +1,129 @@
+{{
+	def is_alpine:
+		env.variant | startswith("alpine")
+	;
+	def os_arches:
+		if is_alpine then
+			{
+				amd64: "x86_64",
+				arm32v6: "armhf",
+				arm32v7: "armv7",
+				arm64v8: "aarch64",
+				i386: "x86",
+				ppc64le: "ppc64le",
+				s390x: "s390x",
+			}
+		else
+			{
+				amd64: "amd64",
+				arm32v5: "armel",
+				arm32v7: "armhf",
+				arm64v8: "arm64",
+				i386: "i386",
+				mips64le: "mips64el",
+				ppc64le: "ppc64el",
+				s390x: "s390x",
+			}
+		end
+-}}
+{{ if is_alpine then ( -}}
+FROM alpine:{{ env.variant | ltrimstr("alpine") }}
+{{ ) else ( -}}
+FROM debian:{{ env.variant }}-slim
+
+RUN set -eux; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		ca-certificates \
+# ERROR: no download agent available; install curl, wget, or fetch
+		curl \
+	; \
+	rm -rf /var/lib/apt/lists/*
+{{ ) end -}}
+
+ENV JULIA_PATH /usr/local/julia
+ENV PATH $JULIA_PATH/bin:$PATH
+
+# https://julialang.org/juliareleases.asc
+# Julia (Binary signing key) <buildbot@julialang.org>
+ENV JULIA_GPG 3673DF529D9049477F76B37566E3C7DC03D6E495
+
+# https://julialang.org/downloads/
+ENV JULIA_VERSION {{ .version }}
+
+RUN set -eux; \
+	\
+{{ if is_alpine then ( -}}
+	apk add --no-cache --virtual .fetch-deps gnupg; \
+{{ ) else ( -}}
+	savedAptMark="$(apt-mark showmanual)"; \
+	if ! command -v gpg > /dev/null; then \
+		apt-get update; \
+		apt-get install -y --no-install-recommends \
+			gnupg \
+			dirmngr \
+		; \
+		rm -rf /var/lib/apt/lists/*; \
+	fi; \
+{{ ) end -}}
+	\
+# https://julialang.org/downloads/#julia-command-line-version
+# https://julialang-s3.julialang.org/bin/checksums/julia-{{ .version }}.sha256
+{{ if is_alpine then ( -}}
+	arch="$(apk --print-arch)"; \
+{{ ) else ( -}}
+	arch="$(dpkg --print-architecture)"; \
+{{ ) end -}}
+	case "$arch" in \
+{{
+	[
+		.arches
+		| to_entries[]
+		| select(.key | if is_alpine then startswith("alpine-") else contains("-") | not end)
+		| (.key | ltrimstr("alpine-")) as $bashbrewArch
+		| (os_arches[$bashbrewArch] // empty) as $osArch
+		| .value
+		| (
+-}}
+		{{ $osArch | @sh }}) \
+			url={{ .url | @sh }}; \
+			sha256={{ .sha256 | @sh }}; \
+			;; \
+{{
+		)
+	] | add
+-}}
+		*) \
+			echo >&2 "error: current architecture ($arch) does not have a corresponding Julia binary release"; \
+			exit 1; \
+			;; \
+	esac; \
+	\
+{{ def wget: if is_alpine then "wget -O" else "curl -fL -o" end -}}
+	{{ wget }} julia.tar.gz.asc "$url.asc"; \
+	{{ wget }} julia.tar.gz "$url"; \
+	\
+	echo "$sha256 *julia.tar.gz" | sha256sum {{ if is_alpine then "-w -c" else "--strict --check" end }} -; \
+	\
+	export GNUPGHOME="$(mktemp -d)"; \
+	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$JULIA_GPG"; \
+	gpg --batch --verify julia.tar.gz.asc julia.tar.gz; \
+	command -v gpgconf > /dev/null && gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" julia.tar.gz.asc; \
+	\
+	mkdir "$JULIA_PATH"; \
+	tar -xzf julia.tar.gz -C "$JULIA_PATH" --strip-components 1; \
+	rm julia.tar.gz; \
+	\
+{{ if is_alpine then ( -}}
+	apk del --no-network .fetch-deps; \
+{{ ) else ( -}}
+	apt-mark auto '.*' > /dev/null; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+{{ ) end -}}
+	\
+# smoke test
+	julia --version
+
+CMD ["julia"]
--- a/Dockerfile-windows-servercore.template
+++ b/Dockerfile-windows-servercore.template
@ -1,15 +1,15 @@
-FROM mcr.microsoft.com/windows/servercore:%%TAG%%
+FROM mcr.microsoft.com/windows/{{ env.windowsVariant }}:{{ env.windowsRelease }}

 # $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

-ENV JULIA_VERSION %%JULIA_VERSION%%
-ENV JULIA_SHA256 %%JULIA_WINDOWS_SHA256%%
+ENV JULIA_VERSION {{ .version }}
+ENV JULIA_URL {{ .arches["windows-amd64"].url }}
+ENV JULIA_SHA256 {{ .arches["windows-amd64"].sha256 }}

-RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win64.exe' -f $env:JULIA_VERSION, ($env:JULIA_VERSION.Split('.')[0..1] -Join '.')); \
-	Write-Host ('Downloading {0} ...' -f $url); \
+RUN Write-Host ('Downloading {0} ...' -f $env:JULIA_URL); \
 	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $url -OutFile 'julia.exe'; \
+	Invoke-WebRequest -Uri $env:JULIA_URL -OutFile 'julia.exe'; \
 	\
 	Write-Host ('Verifying sha256 ({0}) ...' -f $env:JULIA_SHA256); \
 	if ((Get-FileHash julia.exe -Algorithm sha256).Hash -ne $env:JULIA_SHA256) { \
@ -21,10 +21,21 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 	Start-Process -Wait -NoNewWindow \
 		-FilePath '.\julia.exe' \
 		-ArgumentList @( \
+{{
+	# https://github.com/JuliaLang/julia/blob/v1.4.0-rc1/NEWS.md#build-system-changes
+	if env.version == "1.0" then (
+-}}
+			'/S', \
+			'/D=C:\julia' \
+{{ ) else ( -}}
 			'/SILENT', \
 			'/DIR=C:\julia' \
+{{ ) end -}}
 		); \
 	\
+	Write-Host 'Removing ...'; \
+	Remove-Item julia.exe -Force; \
+	\
 	Write-Host 'Updating PATH ...'; \
 	$env:PATH = 'C:\julia\bin;' + $env:PATH; \
 	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
@ -32,9 +43,6 @@ RUN $url = ('https://julialang-s3.julialang.org/bin/winnt/x64/{1}/julia-{0}-win6
 	Write-Host 'Verifying install ("julia --version") ...'; \
 	julia --version; \
 	\
-	Write-Host 'Removing ...'; \
-	Remove-Item julia.exe -Force; \
-	\
 	Write-Host 'Complete.'

 CMD ["julia"]
--- a/apply-templates.sh
+++ b/apply-templates.sh
@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+[ -f versions.json ] # run "versions.sh" first
+
+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 "$jqt" 'https://github.com/docker-library/bashbrew/raw/1da7341a79651d28fbcc3d14b9176593c4231942/scripts/jq-template.awk'
+fi
+
+if [ "$#" -eq 0 ]; then
+	versions="$(jq -r 'keys | map(@sh) | join(" ")' versions.json)"
+	eval "set -- $versions"
+fi
+
+generated_warning() {
+	cat <<-EOH
+		#
+		# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+		#
+		# PLEASE DO NOT EDIT IT DIRECTLY.
+		#
+
+	EOH
+}
+
+for version; do
+	export version
+
+	rm -rf "$version/"
+
+	variants="$(jq -r '.[env.version].variants | map(@sh) | join(" ")' versions.json)"
+	eval "variants=( $variants )"
+
+	for dir in "${variants[@]}"; do
+		mkdir -p "$version/$dir"
+
+		variant="$(basename "$dir")" # "buster", "windowsservercore-1809", etc
+		export variant
+
+		case "$dir" in
+			windows/*)
+				windowsVariant="${variant%%-*}" # "windowsservercore", "nanoserver"
+				windowsRelease="${variant#$windowsVariant-}" # "1809", "ltsc2016", etc
+				windowsVariant="${windowsVariant#windows}" # "servercore", "nanoserver"
+				export windowsVariant windowsRelease
+				template="Dockerfile-windows-$windowsVariant.template"
+				;;
+
+			*)
+				template='Dockerfile-linux.template'
+				;;
+		esac
+
+		echo "processing $version/$dir ..."
+
+		{
+			generated_warning
+			gawk -f "$jqt" "$template"
+		} > "$version/$dir/Dockerfile"
+	done
+done
--- a/generate-stackbrew-library.sh
+++ b/generate-stackbrew-library.sh
@ -4,17 +4,17 @@ set -Eeuo pipefail
 declare -A aliases=(
 	[1.6]='1 latest'
 )
-defaultDebianVariant='bullseye'
-defaultAlpineVariant='alpine3.15'

 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() {
@ -26,15 +26,19 @@ dirCommit() {
 	local dir="$1"; shift
 	(
 		cd "$dir"
-		fileCommit \
-			Dockerfile \
-			$(git show HEAD:./Dockerfile | awk '
+		files="$(
+			git show HEAD:./Dockerfile | awk '
 				toupper($1) == "COPY" {
 					for (i = 2; i < NF; i++) {
+						if ($i ~ /^--from=/) {
+							next
+						}
 						print $i
 					}
 				}
-			')
+			'
+		)"
+		fileCommit Dockerfile $files
 	)
 }

@ -54,24 +58,6 @@ getArches() {
 }
 getArches 'julia'

-source '.architectures-lib'
-
-parentArches() {
-	local version="$1"; shift # "1.8", etc
-	local dir="$1"; shift # "1.8/windows/windowsservercore-ltsc2016"
-
-	local parent="$(awk 'toupper($1) == "FROM" { print $2 }' "$dir/Dockerfile")"
-	local parentArches="${parentRepoToArches[$parent]:-}"
-
-	local arches=()
-	for arch in $parentArches; do
-		if hasBashbrewArch "$version" "$arch" && grep -qE "^# $arch\$" "$dir/Dockerfile"; then
-			arches+=( "$arch" )
-		fi
-	done
-	echo "${arches[*]}"
-}
-
 cat <<-EOH
 # this file is generated via https://github.com/docker-library/julia/blob/$(fileCommit "$self")/$self

@ -87,46 +73,97 @@ join() {
 	echo "${out#$sep}"
 }

-for version in "${versions[@]}"; do
-	for v in \
-		{bullseye,buster} \
-		alpine{3.15,3.14} \
-		windows/windowsservercore-{ltsc2022,1809,ltsc2016} \
-	; do
-		dir="$version/$v"
-		dir="${dir#./}"
-		variant="$(basename "$v")"
+for version; do
+	export version
+	variants="$(jq -r '.[env.version].variants | map(@sh) | join(" ")' versions.json)"
+	eval "variants=( $variants )"

-		[ -f "$dir/Dockerfile" ] || continue
+	fullVersion="$(jq -r '.[env.version].version' versions.json)"

-		commit="$(dirCommit "$dir")"
-
-		fullVersion="$(git show "$commit":"$dir/Dockerfile" | awk '$1 == "ENV" && $2 == "JULIA_VERSION" { print $3; exit }')"
-
-		versionAliases=()
-		while [ "$fullVersion" != "$version" -a "${fullVersion%[.-]*}" != "$fullVersion" ]; do
-			versionAliases+=( $fullVersion )
-			fullVersion="${fullVersion%[.-]*}"
-		done
-		versionAliases+=(
+	versionAliases=(
+		$fullVersion
 		$version
 		${aliases[$version]:-}
 	)

+	defaultDebianVariant="$(jq -r '
+		.[env.version].variants
+		| map(select(
+			startswith("alpine")
+			or startswith("windows/")
+			| not
+		))
+		| .[0]
+	' versions.json)"
+	defaultAlpineVariant="$(jq -r '
+		.[env.version].variants
+		| map(select(
+			startswith("alpine")
+		))
+		| .[0]
+	' versions.json)"
+
+	for v in "${variants[@]}"; do
+		dir="$version/$v"
+		[ -f "$dir/Dockerfile" ] || continue
+		variant="$(basename "$v")"
+		export variant
+
+		commit="$(dirCommit "$dir")"
+
 		variantAliases=( "${versionAliases[@]/%/-$variant}" )
-		if [ "$variant" = "$defaultAlpineVariant" ]; then
+		sharedTags=()
+		case "$variant" in
+			"$defaultDebianVariant" | windowsservercore-*)
+				sharedTags=( "${versionAliases[@]}" )
+				;;
+			"$defaultAlpineVariant")
 				variantAliases+=( "${versionAliases[@]/%/-alpine}" )
-		fi
+				;;
+		esac
 		variantAliases=( "${variantAliases[@]//latest-/}" )

-		sharedTags=()
-		if [ "$variant" = "$defaultDebianVariant" ] || [[ "$variant" == 'windowsservercore'* ]]; then
-			sharedTags+=( "${versionAliases[@]}" )
+		for windowsShared in windowsservercore nanoserver; do
+			if [[ "$variant" == "$windowsShared"* ]]; then
+				sharedTags+=( "${versionAliases[@]/%/-$windowsShared}" )
+				sharedTags=( "${sharedTags[@]//latest-/}" )
+				break
 			fi
+		done

+		constraints=
 		case "$v" in
-			windows/*) variantArches='windows-amd64' ;;
-			*) variantArches="$(parentArches "$version" "$dir")" ;;
+			windows/*)
+				variantArches="$(jq -r '
+					.[env.version].arches
+					| keys[]
+					| select(startswith("windows-"))
+					| select(. != "windows-i386") # TODO "windows-arm64v8" someday? 👀
+				' versions.json | sort)"
+				constraints="$variant"
+				;;
+
+			*)
+				variantParent="$(awk 'toupper($1) == "FROM" { print $2; exit }' "$dir/Dockerfile")"
+				variantArches="${parentRepoToArches[$variantParent]:-}"
+				variantArches="$(
+					comm -12 \
+						<(
+							jq -r '
+								.[env.version].arches
+								| keys[]
+								| if env.variant | startswith("alpine") then
+									if startswith("alpine-") then
+										ltrimstr("alpine-")
+									else
+										empty
+									end
+								else . end
+							' versions.json | sort
+						) \
+						<(xargs -n1 <<<"$variantArches" | sort)
+				)"
+				;;
 		esac

 		echo
@ -139,6 +176,6 @@ for version in "${versions[@]}"; do
 			GitCommit: $commit
 			Directory: $dir
 		EOE
-		[[ "$v" == windows/* ]] && echo "Constraints: $variant"
+		[ -z "$constraints" ] || echo "Constraints: $constraints"
 	done
 done
--- a/8
+++ b/8
@ -1,8 +0,0 @@
-# see https://julialang.org/downloads/#julia-command-line-version
-
-# bashbrew-arch dpkg-arch julia-tar-arch julia-dir-arch
-amd64   amd64   x86_64  x64
-arm32v7 armhf   armv7l  armv7l
-arm64v8 arm64   aarch64 aarch64
-i386    i386    i686    x86
-ppc64le ppc64el ppc64le ppc64le
--- a/update.sh
+++ b/update.sh
@ -1,120 +1,7 @@
 #!/usr/bin/env bash
 set -Eeuo pipefail

-# TODO https://julialang-s3.julialang.org/bin/versions.json ?
-# delayed deploys: https://github.com/JuliaLang/julia/issues/38946#issuecomment-749224376
-
 cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"

-versions=( "$@" )
-if [ ${#versions[@]} -eq 0 ]; then
-	versions=( */ )
-fi
-versions=( "${versions[@]%/}" )
-
-source '.architectures-lib'
-
-# see https://stackoverflow.com/a/2705678/433558
-sed_escape_rhs() {
-	echo "$@" | sed -e 's/[\/&]/\\&/g' | sed -e ':a;N;$!ba;s/\n/\\n/g'
-}
-
-rcRegex='-(pre[.])?(alpha|beta|rc)[0-9]*'
-
-pattern='[^"]*/julia-([0-9]+\.[0-9]+\.[0-9]+('"$rcRegex"')?)-linux-x86_64\.tar\.gz[^"]*'
-allVersions="$(
-	curl -fsSL 'https://julialang.org/downloads/' \
-		| grep -oE "$pattern" \
-		| sed -rn "s!${pattern}!\1!gp" \
-		| sort -ruV
-)"
-
-for version in "${versions[@]}"; do
-	rcVersion="${version%-rc}"
-	rcGrepV='-v'
-	if [ "$rcVersion" != "$version" ]; then
-		rcGrepV=
-	fi
-	rcGrepV+=' -E'
-
-	fullVersion="$(grep -E "^${rcVersion}([.-]|$)" <<<"$allVersions" | grep $rcGrepV -- "$rcRegex" | head -1)"
-	if [ -z "$fullVersion" ]; then
-		echo >&2 "error: failed to determine latest release for '$version'"
-		exit 1
-	fi
-
-	sha256s="$(curl -fsSL "https://julialang-s3.julialang.org/bin/checksums/julia-${fullVersion}.sha256")"
-
-	linuxArchCase='dpkgArch="$(dpkg --print-architecture)"; '$'\\\n'
-	linuxArchCase+=$'\t''case "${dpkgArch##*-}" in '$'\\\n'
-	for dpkgArch in $(dpkgArches "$version"); do
-		tarArch="$(dpkgToJuliaTarArch "$version" "$dpkgArch")"
-		dirArch="$(dpkgToJuliaDirArch "$version" "$dpkgArch")"
-		sha256="$(grep "julia-${fullVersion}-linux-${tarArch}.tar.gz$" <<<"$sha256s" | cut -d' ' -f1 || :)"
-		if [ -z "$sha256" ]; then
-			echo >&2 "warning: cannot find sha256 for $fullVersion on arch $tarArch / $dirArch ($dpkgArch); skipping"
-			continue
-		fi
-		bashbrewArch="$(dpkgToBashbrewArch "$version" "$dpkgArch")"
-		linuxArchCase+="# $bashbrewArch"$'\n'
-		linuxArchCase+=$'\t\t'"$dpkgArch) tarArch='$tarArch'; dirArch='$dirArch'; sha256='$sha256' ;; "$'\\\n'
-	done
-	linuxArchCase+=$'\t\t''*) echo >&2 "error: current architecture ($dpkgArch) does not have a corresponding Julia binary release"; exit 1 ;; '$'\\\n'
-	linuxArchCase+=$'\t''esac'
-
-	winSha256="$(grep "julia-${fullVersion}-win64.exe$" <<<"$sha256s" | cut -d' ' -f1)"
-
-	echo "$version: $fullVersion"
-
-	for v in \
-		windows/windowsservercore-{ltsc2022,1809,ltsc2016} \
-		alpine{3.15,3.14} \
-		{bullseye,buster} \
-	; do
-		dir="$version/$v"
-		variant="$(basename "$v")"
-
-		[ -d "$dir" ] || continue
-
-		case "$variant" in
-			windowsservercore-*) template='windowsservercore'; tag="${variant#*-}" ;;
-			alpine*) template='alpine'; tag="${variant#alpine}" ;;
-			*) template='debian'; tag="${variant}-slim" ;;
-		esac
-
-		variantArchCase="$linuxArchCase"
-		if [ "$template" = 'alpine' ]; then
-			sha256="$(grep "julia-${fullVersion}-musl-x86_64.tar.gz$" <<<"$sha256s" | cut -d' ' -f1 || :)"
-			if [ -z "$sha256" ]; then
-				echo >&2 "error: missing musl build for $fullVersion ($version)!"
-				exit 1
-			fi
-			variantArchCase='apkArch="$(apk --print-arch)"; '$'\\\n'
-			variantArchCase+=$'\t''case "$apkArch" in '$'\\\n'
-			# TODO Alpine multiarch
-			variantArchCase+='# amd64'$'\n'
-			tarArch="$(dpkgToJuliaTarArch "$version" 'amd64')"
-			dirArch="$(dpkgToJuliaDirArch "$version" 'amd64')"
-			variantArchCase+=$'\t\t'"x86_64) tarArch='$tarArch'; dirArch='$dirArch'; sha256='$sha256' ;; "$'\\\n'
-			variantArchCase+=$'\t\t''*) echo >&2 "error: current architecture ($apkArch) does not have a corresponding Julia binary release"; exit 1 ;; '$'\\\n'
-			variantArchCase+=$'\t''esac'
-		fi
-
-		sed -r \
-			-e 's!%%JULIA_VERSION%%!'"$fullVersion"'!g' \
-			-e 's!%%TAG%%!'"$tag"'!g' \
-			-e 's!%%JULIA_WINDOWS_SHA256%%!'"$winSha256"'!g' \
-			-e 's!%%ARCH-CASE%%!'"$(sed_escape_rhs "$variantArchCase")"'!g' \
-			"Dockerfile-$template.template" > "$dir/Dockerfile"
-
-		case "$dir" in
-			1.0/windows/*)
-				# https://github.com/JuliaLang/julia/blob/v1.4.0-rc1/NEWS.md#build-system-changes
-				sed -ri \
-					-e 's!/SILENT!/S!g' \
-					-e 's!/DIR=!/D=!g' \
-					"$dir/Dockerfile"
-				;;
-		esac
-	done
-done
+./versions.sh "$@"
+./apply-templates.sh "$@"
--- a/versions.json
+++ b/versions.json
@ -0,0 +1,150 @@
+{
+  "1.0": {
+    "arches": {
+      "amd64": {
+        "sha256": "9dedd613777ba6ebd8aee5796915ff50aa6188ea03ed143cb687fc2aefd76b03",
+        "url": "https://julialang-s3.julialang.org/bin/linux/x64/1.0/julia-1.0.5-linux-x86_64.tar.gz"
+      },
+      "arm32v7": {
+        "sha256": "cfb2712765db90f0e4fa27e57a88c6d994ebcf1781f8673ebb17b5df7962d0c5",
+        "url": "https://julialang-s3.julialang.org/bin/linux/armv7l/1.0/julia-1.0.5-linux-armv7l.tar.gz"
+      },
+      "arm64v8": {
+        "sha256": "41cea1336ed8861413bb945740e567360e26f241eb3e10b3bb0fccd25655ed28",
+        "url": "https://julialang-s3.julialang.org/bin/linux/aarch64/1.0/julia-1.0.5-linux-aarch64.tar.gz"
+      },
+      "darwin-amd64": {
+        "sha256": "1ff7bd41f396ba3f34dc17c26b78d11adeadfafdea537f7ad17020ef812a39a0",
+        "url": "https://julialang-s3.julialang.org/bin/mac/x64/1.0/julia-1.0.5-mac64.dmg"
+      },
+      "freebsd-amd64": {
+        "sha256": "3bae7ac8afa972ba1febec208f4679430bfc61df85415588f6bb253415d661ac",
+        "url": "https://julialang-s3.julialang.org/bin/freebsd/x64/1.0/julia-1.0.5-freebsd-x86_64.tar.gz"
+      },
+      "i386": {
+        "sha256": "67c8f31699b79df96ce95926a363cd24ffa5bb4d9a814e071b1e8c8ff33e5a8f",
+        "url": "https://julialang-s3.julialang.org/bin/linux/x86/1.0/julia-1.0.5-linux-i686.tar.gz"
+      },
+      "windows-amd64": {
+        "sha256": "83c04bdc264e7ab87f4e22be9f3dff8c5a62a49c8edea6a0c85f4645d4cbac7a",
+        "url": "https://julialang-s3.julialang.org/bin/winnt/x64/1.0/julia-1.0.5-win64.exe"
+      },
+      "windows-i386": {
+        "sha256": "16a26142e4d6fd85515ef896675fd09c1421761b8c6d19822851ec89b341b502",
+        "url": "https://julialang-s3.julialang.org/bin/winnt/x86/1.0/julia-1.0.5-win32.exe"
+      }
+    },
+    "variants": [
+      "bullseye",
+      "buster",
+      "windows/windowsservercore-ltsc2022",
+      "windows/windowsservercore-1809",
+      "windows/windowsservercore-ltsc2016"
+    ],
+    "version": "1.0.5"
+  },
+  "1.6": {
+    "arches": {
+      "alpine-amd64": {
+        "sha256": "63f121dffa982ff9b53c7c8a334830e17e2c9d2efa79316a548d29f7f8925e66",
+        "url": "https://julialang-s3.julialang.org/bin/musl/x64/1.6/julia-1.6.4-musl-x86_64.tar.gz"
+      },
+      "amd64": {
+        "sha256": "52244ae47697e8073dfbc9d1251b0422f0dbd1fbe1a41da4b9f7ddf0506b2132",
+        "url": "https://julialang-s3.julialang.org/bin/linux/x64/1.6/julia-1.6.4-linux-x86_64.tar.gz"
+      },
+      "arm32v7": {
+        "sha256": "9ad3f6bd71eb6840d4cef1569855da20c0b4931a2bdf77703a64df672b0702a1",
+        "url": "https://julialang-s3.julialang.org/bin/linux/armv7l/1.6/julia-1.6.4-linux-armv7l.tar.gz"
+      },
+      "arm64v8": {
+        "sha256": "072daac7229c15fa41d0c1b65b8a3d6ee747323d02f5943da3846b075291b48b",
+        "url": "https://julialang-s3.julialang.org/bin/linux/aarch64/1.6/julia-1.6.4-linux-aarch64.tar.gz"
+      },
+      "darwin-amd64": {
+        "sha256": "a00598f04832b8f5d28039942280feadf40e8a14d7f6264c754ec70627507ace",
+        "url": "https://julialang-s3.julialang.org/bin/mac/x64/1.6/julia-1.6.4-mac64.dmg"
+      },
+      "freebsd-amd64": {
+        "sha256": "2a28938404103e0b7e77839308b49036f742b14d8a95da00c119d2db6e6fbfd7",
+        "url": "https://julialang-s3.julialang.org/bin/freebsd/x64/1.6/julia-1.6.4-freebsd-x86_64.tar.gz"
+      },
+      "i386": {
+        "sha256": "9d43d642174cf22cf0fde18dc2578c84f357d2c619b9d846d3a6da4192ba48cf",
+        "url": "https://julialang-s3.julialang.org/bin/linux/x86/1.6/julia-1.6.4-linux-i686.tar.gz"
+      },
+      "windows-amd64": {
+        "sha256": "c9b6ecdad4feb57e5af12c9ef1a74993a96edbf87a4dc521d57e338397cee9b2",
+        "url": "https://julialang-s3.julialang.org/bin/winnt/x64/1.6/julia-1.6.4-win64.exe"
+      },
+      "windows-i386": {
+        "sha256": "cd41b60beae2664f4ac9e9f30ca9f852aebc3ef00f393b26f126f5861695790d",
+        "url": "https://julialang-s3.julialang.org/bin/winnt/x86/1.6/julia-1.6.4-win32.exe"
+      }
+    },
+    "variants": [
+      "bullseye",
+      "buster",
+      "alpine3.15",
+      "alpine3.14",
+      "windows/windowsservercore-ltsc2022",
+      "windows/windowsservercore-1809",
+      "windows/windowsservercore-ltsc2016"
+    ],
+    "version": "1.6.4"
+  },
+  "1.7-rc": {
+    "arches": {
+      "alpine-amd64": {
+        "sha256": "68dc3d7b17fbcceea383b48d82c63c36b899e05f5cd7537a730d7578f65c40ea",
+        "url": "https://julialang-s3.julialang.org/bin/musl/x64/1.7/julia-1.7.0-rc3-musl-x86_64.tar.gz"
+      },
+      "amd64": {
+        "sha256": "cbf33c533d6f226161f08cdc3cec16745a3dc5afdfbaece95e3f2a5e0b6b7886",
+        "url": "https://julialang-s3.julialang.org/bin/linux/x64/1.7/julia-1.7.0-rc3-linux-x86_64.tar.gz"
+      },
+      "arm32v7": {
+        "sha256": "fff9370f58fd8f94f12a14d38c32d25b9e493d62a6d992edfc378caf9ef8d1cc",
+        "url": "https://julialang-s3.julialang.org/bin/linux/armv7l/1.7/julia-1.7.0-rc3-linux-armv7l.tar.gz"
+      },
+      "arm64v8": {
+        "sha256": "0662f9f31c87559ec33a24b3b83df85071357708287678ca78c7fa4498d05e5c",
+        "url": "https://julialang-s3.julialang.org/bin/linux/aarch64/1.7/julia-1.7.0-rc3-linux-aarch64.tar.gz"
+      },
+      "darwin-amd64": {
+        "sha256": "16bc2f2c6fa901f8f40de0a8628eb8ac792d6b967b2277818ca5532b40acae84",
+        "url": "https://julialang-s3.julialang.org/bin/mac/x64/1.7/julia-1.7.0-rc3-mac64.dmg"
+      },
+      "darwin-arm64v8": {
+        "sha256": "4679b44c194c004037684c6dade8b988968b90adefee4d9483d8f82c61c3aa2b",
+        "url": "https://julialang-s3.julialang.org/bin/mac/aarch64/1.7/julia-1.7.0-rc3-macaarch64.dmg"
+      },
+      "freebsd-amd64": {
+        "sha256": "0ba30a862e990d27961d5c01952cef141bce99774f2e5a3a0a36f42b6c2173bb",
+        "url": "https://julialang-s3.julialang.org/bin/freebsd/x64/1.7/julia-1.7.0-rc3-freebsd-x86_64.tar.gz"
+      },
+      "i386": {
+        "sha256": "9ee7692faee05d7dbe431c59850542d95d260368bbf6d4f0ccdd03be07fef817",
+        "url": "https://julialang-s3.julialang.org/bin/linux/x86/1.7/julia-1.7.0-rc3-linux-i686.tar.gz"
+      },
+      "windows-amd64": {
+        "sha256": "d48563b3faeeb0d937177f989f5c8bfe79552ac11255000870ce770a97c69de8",
+        "url": "https://julialang-s3.julialang.org/bin/winnt/x64/1.7/julia-1.7.0-rc3-win64.exe"
+      },
+      "windows-i386": {
+        "sha256": "fb643f5128f92213a9d704186450a170a57e9975f8c307a0057ca6f18b499914",
+        "url": "https://julialang-s3.julialang.org/bin/winnt/x86/1.7/julia-1.7.0-rc3-win32.exe"
+      }
+    },
+    "variants": [
+      "bullseye",
+      "buster",
+      "alpine3.15",
+      "alpine3.14",
+      "windows/windowsservercore-ltsc2022",
+      "windows/windowsservercore-1809",
+      "windows/windowsservercore-ltsc2016"
+    ],
+    "version": "1.7.0-rc3"
+  }
+}
--- a/versions.sh
+++ b/versions.sh
@ -0,0 +1,108 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
+
+versions=( "$@" )
+if [ ${#versions[@]} -eq 0 ]; then
+	versions=( */ )
+	json='{}'
+else
+	json="$(< versions.json)"
+fi
+versions=( "${versions[@]%/}" )
+
+# https://julialang.org/downloads/#json_release_feed
+# https://julialang-s3.julialang.org/bin/versions.json
+# https://julialang-s3.julialang.org/bin/versions-schema.json
+juliaVersions="$(
+	wget -qO- 'https://julialang-s3.julialang.org/bin/versions.json' | jq -c '
+		[
+			to_entries[]
+			| .key as $version
+			| .value
+			| (
+				($version | sub("^(?<m>[0-9]+[.][0-9]+).*$"; "\(.m)"))
+				+ if .stable then "" else "-rc" end
+			) as $major
+			| {
+				version: $version,
+				major: $major,
+				arches: (.files | map(
+					# map values from the julia versions-schema.json to bashbrew architecture values
+					# (plus some extra fiddly bits for Alpine)
+					{
+						mac: "darwin",
+						winnt: "windows",
+						linux: (
+							if .triplet | endswith("-musl") then
+								"alpine"
+							else
+								"linux"
+							end
+						),
+						freebsd: "freebsd",
+					}[.os] as $os
+					| {
+						x86_64: "amd64",
+						i686: "i386",
+						powerpc64le: "ppc64le",
+						aarch64: "arm64v8",
+						armv7l: "arm32v7",
+					}[.arch] as $arch
+					| if $os == null or $arch == null then empty
+					elif .kind != (if $os == "windows" then "installer" else "archive" end) then empty
+					else {
+						key: (
+							if $os == "linux" then "" else $os + "-" end
+							+ $arch
+						),
+						value: {
+							url: .url,
+							sha256: .sha256,
+						},
+					} end
+				) | from_entries),
+			}
+		] | sort_by([.major, .version] | map(split("[.-]"; "") | map(if test("^[0-9]+$") then tonumber else . end)))
+	'
+)"
+
+for version in "${versions[@]}"; do
+	export version
+
+	if \
+		! doc="$(jq <<<"$juliaVersions" -c '
+			[ .[] | select(.major == env.version) ][-1]
+		')" \
+		|| ! fullVersion="$(jq <<<"$doc" -r '.version')" \
+		|| [ -z "$fullVersion" ] \
+	; then
+		echo >&2 "warning: cannot find full version for $version"
+		continue
+	fi
+
+	echo "$version: $fullVersion"
+
+	json="$(jq <<<"$json" -c --argjson doc "$doc" '.[env.version] = (
+		$doc
+		| del(.major)
+		| .variants = ([
+			"bullseye",
+			"buster",
+			if .arches | keys | any(startswith("alpine-")) then
+				"3.15",
+				"3.14"
+				| "alpine" + .
+			else empty end,
+			if .arches | has("windows-amd64") then
+				"ltsc2022",
+				"1809",
+				"ltsc2016"
+				| "windows/windowsservercore-" + .
+			else empty end
+		])
+	)')"
+done
+
+jq <<<"$json" -S . > versions.json