Migration from Azure Pipelines to Github Actions (#5)

* initial test of new gh actions beta

building for macos/linux, but not releasing yet. fair amount of ugly and
or duplicative code due to lack of templating features from Azure.

* wip github release of binaries

* disable azure releaser to enable test GHA release

* Finish file cleanup from azure->GHA migration

* add GHA badge

.github/workflows/build.yml

@@ -0,0 +1,123 @@
+name: Build
+on: [push]
+
+# this format from Azure doesnt seem to be supported yet.
+# TODO: find these hardcoded values and eliminate with GHA version
+# variables:
+#   scalafmt_version: v2.0.1
+#   graalvm_version: '19.1.1'
+
+jobs:
+  # Initial task to compile a JAR, store as a pipeline artifact to be used by
+  # downstream builders.
+  build-jar:
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Install SBT
+        run: |
+          echo "deb https://dl.bintray.com/sbt/debian /" | sudo tee -a /etc/apt/sources.list.d/sbt.list
+          sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2EE0EA64E40A89B84B2DF73499E82A75642AC823
+          sudo apt-get update
+          sudo apt-get install sbt
+      - name: Build scalafmt with assembly into JAR
+        env:
+          SCALAFMT_VERSION: v2.0.1
+        run: |
+          git clone https://github.com/scalameta/scalafmt --branch ${SCALAFMT_VERSION} --depth 1
+          cd scalafmt
+          sbt cli/assembly
+      - uses: actions/upload-artifact@v1
+        with:
+          path: scalafmt/scalafmt-cli/target/scala-2.12/scalafmt.jar
+          name: jar
+
+  # Use GraalVM on Linux to convert JAR to a native linux static binary
+  native-image-linux:
+    needs: [build-jar]
+    runs-on: ubuntu-18.04
+    container:
+      image: oracle/graalvm-ce:19.1.1
+    steps:
+      - name: install native-image
+        run: gu install native-image
+      - uses: actions/download-artifact@v1
+        with:
+          name: jar
+          path: .
+      # - run: ls -lh
+      - name: build Linux native image (static)
+        run: |
+          native-image \
+            --static \
+            --no-fallback \
+            -jar ./scalafmt.jar \
+            scalafmt-native
+      # - run: ls -lh
+      - run: tar -cvzf scalafmt-native_linux.tgz ./scalafmt-native
+      # - run: ls -lh
+      - uses: actions/upload-artifact@v1
+        with:
+          path: scalafmt-native_linux.tgz
+          name: scalafmt-native_linux
+
+  # Use GraalVM on macOS to convert JAR to a native macOS binary
+  native-image-mac:
+    needs: [build-jar]
+    runs-on: macOS-10.14
+    steps:
+      - name: download GraalVM release
+        env:
+          VERSION: "19.1.1"
+          PLATFORM: darwin-amd64
+        run: |
+          curl -fsL https://github.com/oracle/graal/releases/download/vm-${VERSION}/graalvm-ce-${PLATFORM}-${VERSION}.tar.gz \
+            --output graalvm.tgz
+          tar xzf graalvm.tgz && rm -rf graalvm.tgz
+          mv graalvm-ce-${VERSION} graalvm
+      - name: install native-image
+        env:
+          BIN_PATH: Contents/Home/bin
+        run: ./graalvm/${BIN_PATH}/gu install native-image
+      - uses: actions/download-artifact@v1
+        with:
+          name: jar
+          path: .
+      # - run: ls -lh
+      - name: Build macOS native image
+        env:
+          BIN_PATH: Contents/Home/bin
+        run: |
+          ./graalvm/${BIN_PATH}/native-image \
+            --no-fallback \
+            -jar ./scalafmt.jar \
+            scalafmt-native
+      # - run: ls -lh
+      - run: tar -cvzf scalafmt-native_macOS.tgz ./scalafmt-native
+      # - run: ls -lh
+      - uses: actions/upload-artifact@v1
+        with:
+          path: scalafmt-native_macOS.tgz
+          name: scalafmt-native_macOS
+
+  # Collate artifacts, upload to GitHub Releases on semver tags
+  releaser:
+    needs: [native-image-linux, native-image-mac]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/download-artifact@v1
+        with:
+          name: scalafmt-native_macOS
+          path: .
+      - uses: actions/download-artifact@v1
+        with:
+          name: scalafmt-native_linux
+          path: .
+      - run: ls -lh
+      # TODO: generate changelog? or just handle via bump
+      - name: Release to GitHub
+        if: startsWith(github.ref, 'refs/tags/v')
+        uses: softprops/action-gh-release@v1
+        with:
+          files: "scalafmt*.tgz"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -1,5 +1,6 @@
 # scalafmt-native
 
+[![Build Status](https://github.com/mroth/scalafmt-native/workflows/Build/badge.svg)](https://github.com/mroth/scalafmt-native/actions)
 [
     ![Docker Cloud Automated build](https://img.shields.io/docker/cloud/automated/mrothy/scalafmt-native.svg)
     ![MicroBadger Size](https://img.shields.io/microbadger/image-size/mrothy/scalafmt-native.svg)