add auto-release action

.github/workflows/main.yml

@@ -0,0 +1,61 @@
+name: Release on Tag
+on:
+  push:
+    tags:
+      - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
+    # Pick a branch to generate a new build
+    branches: [ master ]
+
+jobs:
+  # We define the commit hash and also create the release just once or there are errors
+  create-release:
+    runs-on: ubuntu-latest
+    outputs:
+      # We can access this values in the other jobs
+      upload_url: ${{ steps.create_release.outputs.upload_url }}
+      version: ${{ steps.get_version.outputs.version }}
+      #sha_short: ${{ steps.vars.outputs.sha_short }}
+    steps:
+    # This enable to get the commit and can be used for nightly or dev builds
+    #- name: Checkout repo
+    #  uses: actions/checkout@v2
+    #- name: Declare Commit Hash
+    #  id: vars
+    #  shell: bash
+    #  run: |
+    #    echo "::set-output name=sha_short::$(git rev-parse --short HEAD)"
+    - name: Get the version
+      id: get_version
+      run: echo ::set-output name=version::${GITHUB_REF/refs\/tags\//}
+    - name: Create Release
+      id: create_release
+      uses: actions/create-release@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        tag_name: ${{ github.ref }}
+        release_name: ${{ steps.get_version.outputs.version }}
+        draft: false
+        prerelease: false
+
+  build-ubuntu:
+    runs-on: ubuntu-latest
+    needs: [create-release]
+    steps:
+    - name: Checkout repo
+      uses: actions/checkout@v2
+      with:
+        submodules: recursive
+    - name: Package project
+      run: zip --junk-paths matrix matrix.hpp
+    - name: Upload Release Asset
+      id: upload-release-asset
+      uses: actions/upload-release-asset@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        upload_url: ${{ needs.create-release.outputs.upload_url }}
+        asset_path: ./matrix.zip
+        asset_name: matrix-${{ needs.create-release.outputs.version }}.zip
+        asset_content_type: application/zip
+