Consolidated actions and variables

slug/action.yml

@@ -0,0 +1,27 @@
+name: Compute Preview Slug
+description: Derive a URL-safe slug and deterministic port from a branch name
+
+inputs:
+  branch:
+    required: true
+    description: Branch name to slugify
+
+outputs:
+   slug:
+     description: URL-safe branch slug
+     value: ${{ steps.compute.outputs.slug }}
+   port:
+     description: Deterministic port derived from the slug
+     value: ${{ steps.compute.outputs.port }}
+
+runs:
+  using: composite
+  steps:
+    - name: Compute slug and port
+      id: compute
+      shell: bash
+      run: |
+        SLUG=$(echo "${{ inputs.branch }}" | tr '/' '-' | tr '_' '-' | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9-]//g' | cut -c1-40)
+        echo "slug=$SLUG" >> "$GITHUB_OUTPUT"
+        PORT=$(( 20000 + ( $(echo -n "$SLUG" | cksum | awk '{print $1}') % 10000 ) ))
+        echo "port=$PORT" >> "$GITHUB_OUTPUT"