Adding release build action

Author: GinoCanessa

.github/workflows/ReleasePublish.yaml

@@ -0,0 +1,58 @@
+name: Publish
+on:
+  release:
+    types: [published]
+
+jobs:
+  release:
+    name: Release
+    strategy:
+      matrix:
+        kind: ['linux', 'windows', 'macOS']
+        include:
+          - kind: linux
+            os: ubuntu-latest
+            target: linux-x64
+          - kind: windows
+            os: windows-latest
+            target: win-x64
+          - kind: macOS
+            os: macos-latest
+            target: osx-x64
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+
+      - name: Setup dotnet
+        uses: actions/setup-dotnet@v1
+        with:
+          dotnet-version: 3.1.407
+
+      - name: Build
+        shell: bash
+        run: |
+          # Define some variables for things we need
+          tag=$(git describe --tags --abbrev=0)
+          release_name="fhir-codegen-$tag-${{ matrix.target }}"
+
+          # Build everything
+          dotnet publish src/fhir-codegen-cli/fhir-codegen-cli.csproj --framework netcoreapp3.1 --runtime "${{ matrix.target }}" -c Release -o "$release_name"
+
+          # Pack files
+          if [ "${{ matrix.target }}" == "win-x64" ]; then
+            7z a -tzip "${release_name}.zip" "./${release_name}/*"
+          else
+            tar czvf "${release_name}.tar.gz" "$release_name"
+          fi
+
+          # Delete output directory
+          rm -r "$release_name"
+
+      - name: Publish
+        uses: softprops/action-gh-release@v1
+        with:
+          files: "fhir-codegen*"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

fhir-codegen.sln

@@ -11,6 +11,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		GeoPol.xml = GeoPol.xml
 		LICENSE = LICENSE
 		README.md = README.md
+		.github\workflows\ReleasePublish.yaml = .github\workflows\ReleasePublish.yaml
 		SECURITY.md = SECURITY.md
 		stylecop.json = stylecop.json
 		THIRDPARTYNOTICES.md = THIRDPARTYNOTICES.md