Automatically create prelease releases on master builds (#453)

* Automatically create prerelease release on non-tagged master builds

* Push tags first

* For real now

* yolo

* Fix arm build location

* trunk only

.github/workflows/preview-release.yaml

@@ -0,0 +1,128 @@
+name: Preview Release
+on:
+  workflow_run:
+    workflows: ["CI"]
+    types:
+      - completed
+  push:
+    # Run only on trunk pushes that aren't a new tag release
+    branches: [trunk]
+    tags-ignore: "*"
+
+env:
+  BUNDLE_PATH: /tmp/.bundle
+  GEM_HOME: /tmp/.bundle
+  GEM_PATH: /tmp/.bundle
+  TERM: xterm256
+
+jobs:
+  bump-tag:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-ecosystem/action-get-latest-tag@v1
+        id: get-latest-tag
+      - uses: actions-ecosystem/action-bump-semver@v1
+        id: bump-semver
+        with:
+          current_version: ${{ steps.get-latest-tag.outputs.tag }}
+          level: prepatch
+      - uses: actions-ecosystem/action-push-tag@v1
+        with:
+          tag: ${{ steps.bump-semver.outputs.new_version }}
+  build:
+    runs-on: ${{ matrix.os }}
+    needs: [bump-tag]
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-20.04
+            target: native
+          - os: macos-latest
+            target: native
+          - os: ubuntu-20.04
+            target: aarch64-unknown-linux-gnu
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+          fetch-depth: 0
+      - if: runner.os == 'macOS'
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: 1.63.0
+          target: aarch64-apple-darwin
+          default: true
+          override: true
+          profile: minimal
+      - if: runner.os != 'macOS'
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: 1.63.0
+          override: true
+          profile: minimal
+          target: aarch64-unknown-linux-gnu
+      - uses: actions/cache@v2
+        with:
+          path: |
+            librubyfmt/ruby_checkout
+          key: ${{ runner.os }}-${{matrix.target}}-ruby-v1-${{ hashFiles('.git/modules/librubyfmt/ruby_checkout/HEAD') }}
+      - if: runner.os == 'macOS'
+        run: |
+          brew install automake bison
+          echo "/usr/local/opt/bison/bin:$PATH" >> $GITHUB_PATH
+      - run: ./script/make_release
+      - uses: actions/upload-artifact@v3
+        with:
+          name: rubyfmt-release-artifact-${{ matrix.os }}-${{ matrix.target }}
+          path: rubyfmt-*.tar.gz
+  source-release:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+          fetch-depth: 0
+      - run: |
+          TAG=$(git describe HEAD)
+          RELEASE_DIR="out/release"
+          mkdir -p ${RELEASE_DIR}
+          ./script/make_source_release ${TAG}
+      - uses: actions/upload-artifact@v3
+        with:
+          name: rubyfmt-source-release
+          path: "out/release/source"
+  release:
+    runs-on: ubuntu-latest
+    needs:
+      - build
+      - source-release
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-ecosystem/action-get-latest-tag@v1
+        id: get-latest-tag
+      - uses: actions/download-artifact@v3
+        with:
+          name: rubyfmt-source-release
+      - uses: actions/download-artifact@v3
+        with:
+          name: rubyfmt-release-artifact-ubuntu-20.04-aarch64-unknown-linux-gnu
+      - run: |
+          # The arch part of this path is set with uname, but we cross-compile the arm build on
+          # an x86 machine, so we want to make sure the name is correct for the release
+          mv rubyfmt-${{ steps.get-latest-tag.outputs.tag }}-Linux-x86_64.tar.gz rubyfmt-${{ steps.get-latest-tag.outputs.tag }}-Linux-aarch64.tar.gz
+      - uses: actions/download-artifact@v3
+        with:
+          name: rubyfmt-release-artifact-ubuntu-20.04-native
+      - uses: actions/download-artifact@v3
+        with:
+          name: rubyfmt-release-artifact-macos-latest-native
+      - name: Upload Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: rubyfmt-*.tar.gz
+          fail_on_unmatched_files: true
+          generate_release_notes: true
+          prerelease: true
+          tag_name: ${{ steps.get-latest-tag.outputs.tag }}

.github/workflows/release.yaml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-latest
+          - os: ubuntu-20.04
             target: native
           - os: macos-latest
             target: native