j178 · j178 · Dec 21, 2025 · Dec 21, 2025
diff --git a/.github/workflows/build-binaries.yml b/.github/workflows/build-binaries.yml
@@ -1,9 +1,11 @@
-# Build uv on all platforms.
+# Build prek on all platforms.
 #
 # Generates both wheels (for PyPI) and archived binaries (for GitHub releases).
-#
 # Assumed to run as a subworkflow of .github/workflows/release.yml; specifically, as a local
 # artifacts job within `cargo-dist`.
+#
+# Adapted from https://github.com/astral-sh/uv/blob/main/.github/workflows/build-binaries.yml
+
 name: "Build binaries"
 
 on:

diff --git a/.github/workflows/build-docker.yml b/.github/workflows/build-docker.yml
@@ -0,0 +1,160 @@
+# Build and publish a Docker image.
+#
+# Assumed to run as a subworkflow of .github/workflows/release.yml; specifically, as a local
+# artifacts job within `cargo-dist`.
+#
+# Adapted from https://github.com/astral-sh/ty/blob/main/.github/workflows/build-docker.yml
+name: "Build Docker image"
+
+on:
+  workflow_call:
+    inputs:
+      plan:
+        required: true
+        type: string
+  pull_request:
+    paths:
+      - .github/workflows/build-docker.yml
+
+env:
+  PREK_BASE_IMG: ghcr.io/${{ github.repository_owner }}/prek
+
+permissions:
+  contents: read
+  # TODO(zanieb): Ideally, this would be `read` on dry-run but that will require
+  # significant changes to the workflow.
+  packages: write # zizmor: ignore[excessive-permissions]
+
+jobs:
+  docker-build:
+    name: Build Docker image ghcr.io/j178/prek for ${{ matrix.platform }}
+    runs-on: ubuntu-latest
+    environment:
+      name: release
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64
+    steps:
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        with:
+          persist-credentials: false
+
+      - uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+
+      - uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Check tag consistency
+        if: ${{ inputs.plan != '' && !fromJson(inputs.plan).announcement_tag_is_implicit }}
+        env:
+          TAG: ${{ inputs.plan != '' && fromJson(inputs.plan).announcement_tag || 'dry-run' }}
+        run: |
+          version=$(grep -m 1 "^version = " dist-workspace.toml | sed -e 's/version = "\(.*\)"/\1/g')
+          if [ "${TAG}" != "${version}" ]; then
+            echo "The input tag does not match the version from dist-workspace.toml:" >&2
+            echo "${TAG}" >&2
+            echo "${version}" >&2
+            exit 1
+          else
+            echo "Releasing ${version}"
+          fi
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5.10.0
+        with:
+          images: ${{ env.PREK_BASE_IMG }}
+          # Defining this makes sure the org.opencontainers.image.version OCI label becomes the actual release version and not the branch name
+          tags: |
+            type=raw,value=dry-run,enable=${{ inputs.plan == '' || fromJson(inputs.plan).announcement_tag_is_implicit }}
+            type=pep440,pattern={{ version }},value=${{ inputs.plan != '' && fromJson(inputs.plan).announcement_tag || 'dry-run' }},enable=${{ inputs.plan != '' && !fromJson(inputs.plan).announcement_tag_is_implicit }}
+
+      - name: Normalize Platform Pair (replace / with -)
+        run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_TUPLE=${platform//\//-}" >> "$GITHUB_ENV"
+
+      # Adapted from https://docs.docker.com/build/ci/github-actions/multi-platform/
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
+        with:
+          context: .
+          platforms: ${{ matrix.platform }}
+          cache-from: type=gha,scope=prek-${{ env.PLATFORM_TUPLE }}
+          cache-to: type=gha,mode=min,scope=prek-${{ env.PLATFORM_TUPLE }}
+          labels: ${{ steps.meta.outputs.labels }}
+          outputs: type=image,name=${{ env.PREK_BASE_IMG }},push-by-digest=true,name-canonical=true,push=${{ inputs.plan != '' && !fromJson(inputs.plan).announcement_tag_is_implicit }}
+
+      - name: Export digests
+        env:
+          digest: ${{ steps.build.outputs.digest }}
+        run: |
+          mkdir -p /tmp/digests
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digests
+        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        with:
+          name: digests-${{ env.PLATFORM_TUPLE }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  docker-publish:
+    name: Publish Docker image (ghcr.io/j178/prek)
+    runs-on: ubuntu-latest
+    environment:
+      name: release
+    needs:
+      - docker-build
+    if: ${{ inputs.plan != '' && !fromJson(inputs.plan).announcement_tag_is_implicit }}
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5.10.0
+        env:
+          DOCKER_METADATA_ANNOTATIONS_LEVELS: index
+        with:
+          images: ${{ env.PREK_BASE_IMG }}
+          # Order is on purpose such that the label org.opencontainers.image.version has the first pattern with the full version
+          tags: |
+            type=pep440,pattern={{ version }},value=${{ fromJson(inputs.plan).announcement_tag }}
+            type=raw,value=${{ fromJson(inputs.plan).announcement_tag }}
+            type=pep440,pattern={{ major }}.{{ minor }},value=${{ fromJson(inputs.plan).announcement_tag }}
+
+      - uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Adapted from https://docs.docker.com/build/ci/github-actions/multi-platform/
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        # The jq command expands the docker/metadata json "tags" array entry to `-t tag1 -t tag2 ...` for each tag in the array
+        # The printf will expand the base image with the `<PREK_BASE_IMG>@sha256:<sha256> ...` for each sha256 in the directory
+        # The final command becomes `docker buildx imagetools create -t tag1 -t tag2 ... <PREK_BASE_IMG>@sha256:<sha256_1> <PREK_BASE_IMG>@sha256:<sha256_2> ...`
+        run: |
+          # shellcheck disable=SC2046
+          readarray -t lines <<< "$DOCKER_METADATA_OUTPUT_ANNOTATIONS"; annotations=(); for line in "${lines[@]}"; do annotations+=(--annotation "$line"); done
+
+          docker buildx imagetools create \
+            "${annotations[@]}" \
+            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf "${PREK_BASE_IMG}@sha256:%s " *)
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
@@ -68,7 +68,7 @@ jobs:
         # we specify bash to get pipefail; it guards against the `curl` command
         # failing. otherwise `sh` won't catch that `curl` returned non-0
         shell: bash
-        run: "curl --proto '=https' --tlsv1.2 -LsSf https://github.com/axodotdev/cargo-dist/releases/download/v0.30.0/cargo-dist-installer.sh | sh"
+        run: "curl --proto '=https' --tlsv1.2 -LsSf https://github.com/axodotdev/cargo-dist/releases/download/v0.30.3/cargo-dist-installer.sh | sh"
       - name: Cache dist
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
         with:
@@ -100,11 +100,21 @@ jobs:
       plan: ${{ needs.plan.outputs.val }}
     secrets: inherit
 
+  custom-build-docker:
+    needs:
+      - plan
+    if: ${{ needs.plan.outputs.publishing == 'true' || fromJson(needs.plan.outputs.val).ci.github.pr_run_mode == 'upload' || inputs.tag == 'dry-run' }}
+    uses: ./.github/workflows/build-docker.yml
+    with:
+      plan: ${{ needs.plan.outputs.val }}
+    secrets: inherit
+
   # Build and package all the platform-agnostic(ish) things
   build-global-artifacts:
     needs:
       - plan
       - custom-build-binaries
+      - custom-build-docker
     runs-on: "ubuntu-latest"
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -151,9 +161,10 @@ jobs:
     needs:
       - plan
       - custom-build-binaries
+      - custom-build-docker
       - build-global-artifacts
-    # Only run if we're "publishing", and only if local and global didn't fail (skipped is fine)
-    if: ${{ always() && needs.plan.outputs.publishing == 'true' && (needs.build-global-artifacts.result == 'skipped' || needs.build-global-artifacts.result == 'success') && (needs.custom-build-binaries.result == 'skipped' || needs.custom-build-binaries.result == 'success') }}
+    # Only run if we're "publishing", and only if plan, local and global didn't fail (skipped is fine)
+    if: ${{ always() && needs.plan.result == 'success' && needs.plan.outputs.publishing == 'true' && (needs.build-global-artifacts.result == 'skipped' || needs.build-global-artifacts.result == 'success') && (needs.custom-build-binaries.result == 'skipped' || needs.custom-build-binaries.result == 'success') && (needs.custom-build-docker.result == 'skipped' || needs.custom-build-docker.result == 'success') }}
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     runs-on: "ubuntu-latest"

diff --git a/Dockerfile b/Dockerfile
@@ -32,9 +32,9 @@ RUN rustup toolchain install
 RUN rustup target add $(cat rust_target.txt)
 
 # Build
-COPY Cargo.toml Cargo.lock build.rs ./
-COPY src src
-COPY lib lib
+COPY ./Cargo.toml Cargo.toml
+COPY ./Cargo.lock Cargo.lock
+COPY crates crates
 RUN case "${TARGETPLATFORM}" in \
   "linux/arm64") export JEMALLOC_SYS_WITH_LG_PAGE=16;; \
   esac && \

diff --git a/dist-workspace.toml b/dist-workspace.toml
@@ -4,7 +4,7 @@ members = ["cargo:."]
 # Config for 'dist'
 [dist]
 # The preferred dist version to use in CI (Cargo.toml SemVer syntax)
-cargo-dist-version = "0.30.0"
+cargo-dist-version = "0.30.3"
 # The archive format to use for non-windows builds (defaults .tar.xz)
 unix-archive = ".tar.gz"
 # CI backends to support
@@ -45,7 +45,7 @@ targets = [
     "i686-pc-windows-msvc"
 ]
 # Local artifacts jobs to run in CI
-local-artifacts-jobs = ["./build-binaries"]
+local-artifacts-jobs = ["./build-binaries", "./build-docker"]
 # Publish jobs to run in CI
 publish-jobs = ["./publish", "homebrew"]
 # Post-announce jobs to run in CI