fix: prepare upgrade to docker-compose v5

The following downloads the finished docker-compose v5 binary and delivers it as
a scratch container image.

.gitea/workflows/auto-release.yaml

@@ -4,7 +4,7 @@ on:
   push:
     branches: [ "master" ]
     paths:
-    - Makefile
+    - Dockerfile
 
 env:
   GIT_EMAIL: noreply@cryptic.systems
@@ -26,8 +26,8 @@ jobs:
         run: |
           echo "changed=false" >> $GITHUB_OUTPUT
 
-          for file in Makefile; do
+          for file in Dockerfile; do
-            if git diff HEAD~1 HEAD -- "${file}" | grep --quiet '^[+-]DC_VERSION'; then
+            if git diff HEAD~1 HEAD -- "${file}" | grep --quiet '^[+-]ARG DC_VERSION'; then
               echo "DC_VERSION line changed."
               echo "changed=true" >> $GITHUB_OUTPUT
               break
@@ -42,7 +42,7 @@ jobs:
         id: create_tag
         if: steps.check_change.outputs.changed == 'true'
         run: |
-          defined_tag="$(grep --only-matching --perl-regexp 'DC_VERSION\?=v?[\d]*(\.[\d]*){0,2}' Makefile | cut --delimiter='=' --fields=2)"
+          defined_tag="$(grep --only-matching --perl-regexp 'ARG DC_VERSION=v?[\d]*(\.[\d]*){0,2}' Dockerfile | cut --delimiter='=' --fields=2)"
 
           echo "defined_tag=${defined_tag}" >> $GITHUB_OUTPUT
           echo "New tag: ${defined_tag}"

.gitea/workflows/build.yaml

@@ -1,10 +1,5 @@
 name: Build
 
-env:
-  GONOSUMDB: ${{ vars.GONOSUMDB }}
-  GOPRIVATE: ${{ vars.GOPRIVATE }}
-  GOPROXY: ${{ vars.GOPROXY }}
-
 on:
   pull_request:
     types:
@@ -29,9 +24,6 @@ jobs:
           TAG=latest
 
           docker buildx build \
-            --build-arg GONOSUMDB=${GONOSUMDB} \
-            --build-arg GOPRIVATE=${GOPRIVATE} \
-            --build-arg GOPROXY=${GOPROXY} \
             --platform linux/arm64 \
             --file Dockerfile \
             --provenance false \
@@ -50,9 +42,6 @@ jobs:
           TAG=latest
 
           docker buildx build \
-            --build-arg GONOSUMDB=${GONOSUMDB} \
-            --build-arg GOPRIVATE=${GOPRIVATE} \
-            --build-arg GOPROXY=${GOPROXY} \
             --platform linux/amd64 \
             --file Dockerfile \
             --provenance false \

.gitea/workflows/release.yaml

@@ -1,8 +1,5 @@
 name: Release
 
-env:
-  GOPROXY: ${{ vars.GOPROXY }}
-
 on:
   push:
     tags:
@@ -48,9 +45,6 @@ jobs:
         run: |
           docker buildx build \
             --build-arg DC_VERSION=${{ steps.version_extraction.outputs.version_raw }} \
-            --build-arg GONOSUMDB=${GONOSUMDB} \
-            --build-arg GOPRIVATE=${GOPRIVATE} \
-            --build-arg GOPROXY=${GOPROXY} \
             --file Dockerfile \
             --platform linux/arm64 \
             --provenance false \
@@ -91,9 +85,6 @@ jobs:
         run: |
           docker buildx build \
             --build-arg DC_VERSION=${{ steps.version_extraction.outputs.version_raw }} \
-            --build-arg GONOSUMDB=${GONOSUMDB} \
-            --build-arg GOPRIVATE=${GOPRIVATE} \
-            --build-arg GOPROXY=${GOPROXY} \
             --file Dockerfile \
             --platform linux/amd64 \
             --provenance false \

.gitea/workflows/update-docker-hub-description.yaml

@@ -10,8 +10,7 @@ on:
 
 jobs:
   update-description-on-hub-docker-io:
-    runs-on:
+    runs-on: ubuntu-latest
-    - ubuntu-latest
     steps:
     - uses: actions/checkout@v6.0.1
     - uses: peter-evans/dockerhub-description@v5.0.0

Dockerfile

@@ -1,21 +1,24 @@
-FROM docker.io/library/golang:1.25.5-alpine3.21 AS build
+FROM docker.io/library/ubuntu:24.04 AS download
 
-ARG DC_VERSION=main
+# renovate: datasource=github-releases depName=docker/compose
-ARG GONOSUMDB
+ARG DC_VERSION=v2.40.3
-ARG GOPRIVATE
-ARG GOPROXY
 
-RUN set -ex && \
+RUN NAME=docker-compose-$(uname | tr [:upper:] [:lower:])-$(uname -m); \
-    apk update && \
+    apt update --yes && \
-    apk upgrade && \
+    apt install --yes curl && \
-    apk add git make
+    curl \
+      --fail \
+      --output "/tmp/${NAME}" \
+      --location "https://github.com/docker/compose/releases/download/${DC_VERSION}/${NAME}" && \
+    curl \
+      --fail \
+      --output /tmp/checksums.txt \
+      --location "https://github.com/docker/compose/releases/download/${DC_VERSION}/checksums.txt" && \
+    (cd /tmp && sha256sum --ignore-missing --check checksums.txt) && \
+    ln -s "${NAME}" /tmp/docker-compose && \
+    chmod +x /tmp/docker-compose
 
-RUN git clone https://github.com/docker/compose.git --branch ${DC_VERSION} docker-compose && \
+FROM scratch
-    cd docker-compose && \
-    make DESTDIR=/cache
-
-FROM docker.io/library/alpine:3.23
-
-COPY --from=build /cache/docker-compose /usr/bin/docker-compose
 
+COPY --from=download /tmp/docker-compose /usr/bin/docker-compose
 ENTRYPOINT [ "/usr/bin/docker-compose" ]

Makefile

@@ -1,7 +1,3 @@
-# DC_VERSION
-# Only required to install a specify version
-DC_VERSION?=v2.40.3 # renovate: datasource=github-releases depName=docker/compose
-
 # CONTAINER_RUNTIME
 # The CONTAINER_RUNTIME variable will be used to specified the path to a container runtime. This is needed to start and
 # run a container image.
@@ -17,20 +13,11 @@ DC_IMAGE_NAME:=docker-compose
 DC_IMAGE_VERSION?=latest
 DC_IMAGE_FULLY_QUALIFIED=${DC_IMAGE_REGISTRY_NAME}/${DC_IMAGE_NAMESPACE}/${DC_IMAGE_NAME}:${DC_IMAGE_VERSION}
 
-# Golang related environment variables
-GONOSUMDB?=
-GOPRIVATE?=
-GOPROXY?=
-
 # BUILD CONTAINER IMAGE
 # =====================================================================================================================
 PHONY:=container-image/build
 container-image/build:
 	${CONTAINER_RUNTIME} build \
-		--build-arg DC_VERSION=${DC_VERSION} \
-		--build-arg GONOSUMDB=${GONOSUMDB} \
-		--build-arg GOPRIVATE=${GOPRIVATE} \
-		--build-arg GOPROXY=${GOPROXY} \
 		--file Dockerfile \
 		--no-cache \
 		--pull \