fix: generate release .tgz and correct checksum (#57)

Closes #56

.github/release_notes.template

@@ -0,0 +1,14 @@
+## `WORKSPACE` code
+```starlark
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+http_archive(
+    name = "rules_cuda",
+    sha256 = "{archive_sha256}",
+    strip_prefix = "rules_cuda-{version}",
+    urls = ["https://github.com/bazel-contrib/rules_cuda/releases/download/{version}/rules_cuda-{version}.tar.gz"],
+)
+
+load("@rules_cuda//cuda:repositories.bzl", "register_detected_cuda_toolchains", "rules_cuda_dependencies")
+rules_cuda_dependencies()
+register_detected_cuda_toolchains()
+```

.github/workflows/release.yaml

@@ -38,12 +38,37 @@ jobs:
           # Bazelisk will download bazel to here
           XDG_CACHE_HOME: ~/.cache/bazel-repo
         run: bazelisk --bazelrc=.github/workflows/ci.bazelrc --bazelrc=.bazelrc test //...
+      - name: Create rules archive
+        run: |
+          PREFIX="rules_cuda-${GITHUB_REF_NAME}"
+          git archive --format=tar.gz --prefix=${PREFIX}/ ${GITHUB_REF_NAME} -o ${{ github.workspace }}/.github/rules_cuda.tar.gz
+          echo "ARCHIVE_SHA256=$(shasum -a 256 ${{ github.workspace }}/.github/rules_cuda.tar.gz | cut -d ' ' -f 1)" >> $GITHUB_ENV
+          echo "RELEASE_VERSION=${GITHUB_REF_NAME}" >> $GITHUB_ENV
+      # Upload the artifact in case creating a release fails so all artifacts can then be manually recovered.
+      - uses: actions/upload-artifact@v2
+        with:
+          name: "rules_cuda.tar.gz"
+          path: ${{ github.workspace }}/.github/rules_cuda.tar.gz
+          if-no-files-found: error
       - name: Prepare workspace snippet
-        run: .github/workflows/workspace_snippet.sh $GITHUB_REF_NAME > release_notes.txt
-      - name: Release
+        run: |
+          sed 's/{version}/${{ env.RELEASE_VERSION }}/g' ${{ github.workspace }}/.github/release_notes.template \
+          | sed 's/{archive_sha256}/${{ env.ARCHIVE_SHA256 }}/g' \
+          > ${{ github.workspace }}/.github/release_notes.txt
+      - name: Create the release
         uses: softprops/action-gh-release@v1
+        id: rules_cuda_release
         with:
           prerelease: true
           # Use GH feature to populate the changelog automatically
           generate_release_notes: true
-          body_path: release_notes.txt
+          body_path: ${{ github.workspace }}/.github/release_notes.txt
+      - name: "Upload the rules archive"
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.rules_cuda_release.outputs.upload_url }}
+          asset_name: rules_cuda-${{ env.RELEASE_VERSION }}.tar.gz
+          asset_path: ${{ github.workspace }}/.github/rules_cuda.tar.gz
+          asset_content_type: application/gzip

examples/WORKSPACE.bazel

@@ -5,8 +5,6 @@ local_repository(
     path = "../",
 )
 
-#---SNIP--- Below here is re-used in the workspace snippet published on releases
-
 ######################
 # rules_bazel setup  #
 ######################