Publish to hackage directly from GitHub. (#38)

Author: alaendle

.github/workflows/publish.yaml

@@ -0,0 +1,25 @@
+name: publish
+
+on:
+  push:
+    branches:
+      - main
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - run: cabal check
+
+      - uses: sol/haskell-autotag@v1
+        id: autotag
+        with:
+          prefix: v
+
+      - run: cabal sdist
+      - uses: haskell-actions/[email protected]
+        with:
+          hackageToken: ${{ secrets.HACKAGE_AUTH_TOKEN }}
+          publish: true
+        if: steps.autotag.outputs.created