wip

.dockerignore

@@ -0,0 +1,5 @@
+.git
+.github
+*.DS_Store
+LICENSE
+README.md

.github/workflows/ci.yml

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+name: CI
+
+on:
+  workflow_dispatch:
+  pull_request_target:
+  push:
+    branches:
+      - main
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        arch: ["amd64", "arm64/v8", "arm/v7"]
+        busybox: ["glibc", "musl", "uclibc"]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup QEMU
+        uses: docker/setup-qemu-action@v3
+        with:
+          platforms: arm64,arm
+      - name: Setup buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Build container
+        uses: docker/build-push-action@v6
+        with:
+          build-args: ARCH=${{ matrix.arch }}
+          context: .
+          file: ./Dockerfile
+          load: true
+          push: false
+          tags: test-${{ matrix.arch }}-${{ matrix.busybox }}
+      - name: Test 
+        run: |
+          test "$(docker run --rm -it "test-${{ matrix.arch }}-${{ matrix.busybox }}" -c "php -r 'echo shell_exec(\"whoami\");'")" = "nonroot"

Dockerfile

@@ -1,41 +1,41 @@
+ARG _DEB_VERSION="12"
+
 ARG ARCH="arm64/v8"
-ARG PKGS="bash curl php"
-ARG BINS="bash curl php"
 
-ARG BASE_IMAGE="debian"
-ARG BASE_TAG="12"
+ARG BASE="debian:${_DEB_VERSION}"
+ARG BASE_PKGS="php"
+ARG BASE_BINS="php"
 ARG BASE_PKG_INSTALL_CMD="apt-get update && apt-get install -y"
 
-ARG TARGET_IMAGE="gcr.io/distroless/base-nossl-debian${BASE_TAG}"
-ARG TARGET_TAG="latest"
+ARG BUSYBOX="busybox:latest"
+
+ARG TARGET="gcr.io/distroless/base-nossl-debian${_DEB_VERSION}:latest"
+
+FROM --platform="linux/${ARCH}" ${BUSYBOX} AS busybox
 
-FROM --platform="linux/${ARCH}" ${BASE_IMAGE}:${BASE_TAG} AS base
+FROM --platform="linux/${ARCH}" ${BASE} AS base
 
-ARG PKGS
-ARG BINS
+ARG BASE_PKGS
+ARG BASE_BINS
 ARG BASE_PKG_INSTALL_CMD
 
 COPY --chmod=755 "dependency_resolve" "/usr/local/bin/dependency_resolve"
 
-RUN /bin/sh -c "${BASE_PKG_INSTALL_CMD} ${PKGS}" \
+RUN /bin/sh -c "${BASE_PKG_INSTALL_CMD} ${BASE_PKGS}" \
  && /usr/local/bin/dependency_resolve \
       "$(which "ldd")" \
-      $(echo "${BINS}" | xargs which) \
-    | xargs -I {} sh -c 'mkdir -p /root/rootfs/$(dirname "{}") && cp -apP "{}" "/root/rootfs/{}"' \
-&& for BINARY in ${BINS}; do \
-     "${BINARY}" --version >> "/root/rootfs/expect.txt"; \
-   done
+      $(echo "${BASE_BINS}" | xargs which) \
+    | xargs -I {} sh -c 'mkdir -p /root/rootfs/$(dirname "{}") && cp -apP "{}" "/root/rootfs/{}"'
 
-FROM --platform="linux/${ARCH}" busybox:latest as busybox
+FROM --platform="linux/${ARCH}" ${TARGET} AS target
 
-FROM --platform="linux/${ARCH}" ${TARGET_IMAGE}:${TARGET_TAG} as target
-
-ARG PKGS
-ARG BINS
+ARG BASE_BINS
 
 COPY --from=base "/root/rootfs" "/"
 
 COPY --from=busybox "/bin/busybox" "/bin/busybox"
-RUN ["/bin/busybox", "ln", "-s", "/bin/busybox", "/bin/sh"]
+RUN ["/bin/busybox", "--install", "-s"]
+
+USER nonroot
 
 ENTRYPOINT ["/bin/sh"]

README.md

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+# dependency_resolve - distroless packaging support
+
+Binary packaging support tool for distroless / alpine.
+
+## Usage
+
+```Dockerfile
+FROM debian:12 AS builder
+COPY --chmod=755 "dependency_resolve" "/usr/local/bin/dependency_resolve"
+RUN apt-get update && apt-get install -y "php"
+RUN dependency_resolve "$(which "ldd")" "$(which "php")" | xargs -I {} sh -c 'mkdir -p /root/rootfs/$(dirname "{}") && cp -apP "{}" "/root/rootfs/{}"'
+
+FROM gcr.io/distroless/base-nossl-debian12:latest
+COPY --from=builder "/root/rootfs" "/"
+
+ENTRYPOINT ["/usr/bin/php"]
+```
+
+See `Dockerfile` for more details.