Merge pull request #2 from mrisc32/feature/add_gh_actions

CI: Add a GH action "Build Toolchain"

.github/workflows/build-toolchain.yml

@@ -0,0 +1,88 @@
+---
+name: Build Toolchain
+
+on:
+  push:
+    tags:
+      - v*
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: Build Toolchain
+        run: |
+          ./build-in-docker.sh
+          mv out/install mrisc32-gnu-toolchain
+          tar -cvzf mrisc32-gnu-toolchain.tar.gz mrisc32-gnu-toolchain
+
+      - name: Upload
+        uses: actions/upload-artifact@v1
+        with:
+          path: mrisc32-gnu-toolchain.tar.gz
+          name: mrisc32-gnu-toolchain.tar.gz
+
+  release:
+    if: contains(github.ref, 'tags/v')
+    runs-on: ubuntu-20.04
+    needs: build
+
+    steps:
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ github.ref }}
+          draft: false
+          prerelease: false
+
+      - name: Store Release url
+        run: |
+          echo "${{ steps.create_release.outputs.upload_url }}" > ./upload_url
+
+      - uses: actions/upload-artifact@v1
+        with:
+          path: ./upload_url
+          name: upload_url
+
+  publish:
+    if: contains(github.ref, 'tags/v')
+    runs-on: ubuntu-20.04
+    needs: release
+
+    steps:
+    - name: Download artifact
+      uses: actions/download-artifact@v1
+      with:
+        name: mrisc32-gnu-toolchain.tar.gz
+        path: ./
+
+    - name: Download URL
+      uses: actions/download-artifact@v1
+      with:
+        name: upload_url
+        path: ./
+    - id: set_upload_url
+      run: |
+        upload_url=`cat ./upload_url`
+        echo ::set-output name=upload_url::$upload_url
+    - name: Upload to Release
+      id: upload_to_release
+      uses: actions/upload-release-asset@v1.0.1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        upload_url: ${{ steps.set_upload_url.outputs.upload_url }}
+        asset_path: mrisc32-gnu-toolchain.tar.gz
+        asset_name: mrisc32-gnu-toolchain.tar.gz
+        asset_content_type: application/x-tar