Add release workflow

.github/workflows/release.yml

@@ -0,0 +1,45 @@
+name: Release
+
+env:
+  smalltalk: 'Squeak64-5.3'
+  PATH_TO_SAR: '/home/runner/.smalltalkCI/_builds/Algernon.sar'
+
+on:
+  push:
+    tags:
+      - "v*"
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    name: Build SAR
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0  # full-clone, needed for commit messages
+      - uses: hpi-swa/setup-smalltalkCI@v1
+        id: smalltalkci
+        with:
+          smalltalk-image: ${{ ENV.smalltalk }}
+      - run: smalltalkci -s ${{ ENV.smalltalk }} ./.release.smalltalk.ston
+        shell: bash
+        timeout-minutes: 15
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Retrieve Release Version
+        if: startsWith(github.ref, 'refs/tags/')
+        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+      - name: Generate Release Notes
+        run: |
+          LAST_VERSION=$(git tag --list --sort=-version:refname "v*" | head -2 | tail -1)
+          echo "Comparing $LAST_VERSION to $RELEASE_VERSION"
+          git log $LAST_VERSION..$RELEASE_VERSION --pretty=format:'- %s' | tee ${{ github.workspace }}-CHANGELOG.txt
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: ${{ ENV.PATH_TO_SAR }}
+          name: Algernon ${{ ENV.RELEASE_VERSION }}
+          body_path: ${{ github.workspace }}-CHANGELOG.txt
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+

.release.smalltalk.ston

@@ -0,0 +1,22 @@
+SmalltalkCISpec {
+  #loading : [
+    SCIMetacelloLoadSpec {
+      #baseline : 'Algernon',
+      #directory : 'packages',
+      #load : 'Tests',
+      #platforms : [ #squeak ],
+      #useLatestMetacello : true
+    }
+  ],
+  #preLoading : [
+    'scripts/preLoading.st'
+  ],
+  #postLoading : [
+    'scripts/create_sar.st'
+  ],
+  #testing : { 
+    #categories : [],
+    #failOnZeroTests : false
+  }
+}
+

scripts/create_sar.st

@@ -0,0 +1 @@
+ALGInstallation instance sarFromPackage: 'Algernon'.

temp

@@ -0,0 +1 @@
+still a temp file