Add upstream-dispatch to trigger shim (#775)

* Add upstream-dispatch to trigger shim

* Switch from manual PAT to GITHUB_TOKEN

Author: lloesche

.github/workflows/docker-build.yml

@@ -109,7 +109,7 @@ jobs:
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
-          password: ${{ secrets.GHCR_PAT }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
 #      - name: Login to Docker Hub
 #        if: github.event_name != 'pull_request'
@@ -132,6 +132,7 @@ jobs:
             org.opencontainers.image.title=valheim-server
             org.opencontainers.image.description=Valheim Server
             org.opencontainers.image.licenses=Apache-2.0
+            org.opencontainers.image.source=https://github.com/community-valheim-tools/valheim-server-docker
             org.opencontainers.image.documentation=https://github.com/community-valheim-tools/valheim-server-docker/blob/main/README.md
 
       - name: Build and push Docker image

.github/workflows/upstream-dispatch-workflow.yml

@@ -0,0 +1,43 @@
+name: Notify Legacy GHCR Shim
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+    inputs:
+      ref:
+        description: Branch or tag ref to send to the shim repo
+        required: false
+        default: refs/heads/main
+      sha:
+        description: Exact commit SHA to build; defaults to current commit
+        required: false
+
+jobs:
+  notify-shim:
+    name: Trigger shim repository build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Dispatch build to shim repository
+        uses: actions/github-script@v8
+        with:
+          github-token: ${{ secrets.SHIM_REPO_DISPATCH_TOKEN }}
+          script: |
+            const requestedRef = context.eventName === "workflow_dispatch"
+              ? (core.getInput("ref") || "refs/heads/main")
+              : context.ref;
+
+            const requestedSha = context.eventName === "workflow_dispatch"
+              ? (core.getInput("sha") || context.sha)
+              : context.sha;
+
+            await github.rest.repos.createDispatchEvent({
+              owner: "lloesche",
+              repo: "valheim-server-docker-shim",
+              event_type: "upstream-update",
+              client_payload: {
+                ref: requestedRef,
+                sha: requestedSha
+              }
+            });