add github actions config

.github/workflows/install-build-tools.ps1

@@ -0,0 +1,12 @@
+# Check to see if we are currently running "as Administrator"
+# See: https://github.com/mvijfschaft/dotfiles/blob/master/install.ps1
+
+
+# https://github.com/lukesampson/scoop
+Set-ExecutionPolicy RemoteSigned -scope CurrentUser
+Invoke-Expression (New-Object System.Net.WebClient).DownloadString('https://get.scoop.sh')
+
+scoop update
+
+scoop install llvm --global
+

.github/workflows/rust.yml

@@ -0,0 +1,51 @@
+name: Build dylib
+on: [push]
+jobs:
+  build-win:
+    runs-on: windows-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: install llvm
+        run: .\.github\workflows\install-build-tools.ps1
+        shell: powershell
+      - name: install rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          default: true
+          override: true
+      - name: build with clang in env
+        env:
+          LIBCLANG_PATH: "C:\\ProgramData\\scoop\\apps\\llvm\\current\\bin"
+        run: cargo build --release --all-features
+      - name: release
+        uses: softprops/action-gh-release@v1
+        # only do this step when there's a git tag
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: target/release/deltapack.dll
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  build-mac:
+    runs-on: macos-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: install toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          target: x86_64-apple-darwin
+          default: true
+          override: true
+      - name: build
+        run: cargo build --release --all-features
+      - name: release
+        uses: softprops/action-gh-release@v1
+        # only do this step when there's a git tag
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: target/release/libdeltapack.dylib
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -95,3 +95,16 @@ The exported payload will now contain a library file specific to your client's g
 libincremental_patch.so linux-test.pck          linux-test.x86_64
 ```
 
+## Making a new release
+
+This project is configured to publish Mac and Windows versions
+of the rust lib using github actions.
+
+You need to tag a release in order to trigger the publishing
+step.  You can then download the shared lib from the releases
+page in github.
+
+```sh
+git tag -a v0.1.0 -m "my release"
+git push --tags
+```