avoid multiple workflows

.github/workflows/container-image-buildah.yml

@@ -1,17 +1,30 @@
 name: Container Image Reusable Workflow
 
 on:
-  workflow_call:
+  workflow_dispatch:
     inputs:
-      platforms:
-        description: comma-separated list of platforms to build for, e.g. linux/amd64,linux/s390x,linux/ppc64le
+      platforms: &platforms
+        description: "comma-separated list of platforms to build for, downstream supported are linux/amd64,linux/s390x,linux/ppc64le; note: clang is broken on s390x (RHEL-15874), also cross-builds take more than 6 hours so we don't do them"
         default: linux/amd64
-        type: string
       custom_tag:
-        description: optional custom tag on remote repo you want image to be tagged with
+        description: &tag optional custom tag on remote repo you want image to be tagged with
+        default: scratch
+  workflow_call:
+    inputs:
+      platforms: *platforms
+      custom_tag:
+        description: *tag
         required: false
         default: ''
         type: string
+  schedule:
+    # every Wednesday morning
+    - cron: 7 7 * * 3
+  push:
+    branches: [ main ]
+    tags: [ "**" ]
+  pull_request:
+    types: [opened, reopened, synchronize]
 
 concurrency:
   group: ci-container-build-${{ github.ref }}-1
@@ -65,7 +78,7 @@ jobs:
         uses: redhat-actions/buildah-build@v2
         with:
           tags: ${{ steps.meta.outputs.tags }}
-          platforms: ${{ inputs.platforms }}
+          platforms: ${{ inputs.platforms == '' && 'linux/amd64' || inputs.platforms }}
           labels: ${{ steps.meta.outputs.labels }}
           layers: false
           oci: true
@@ -93,18 +106,19 @@ jobs:
           # accessing a mapped port from a container did not work so lets
           # create a pod where both - server and client have same localhost
           podman pod create > podid
+          platforms=${{ steps.build-image.inputs.platforms }}
 
           test_tag () {
-            podman run -d --pod-id-file=podid --name=searchd -u 14:0 ${{ steps.build-image.outputs.image-with-tag }}$1
+            podman run -d --pod-id-file=podid --name=searchd -u 14:0 $platforms$1
             sleep 3
             podman logs searchd
             podman run --pod-id-file=podid --rm --entrypoint "/bin/env" mysql:8 -- mysql -h 127.0.0.1 -P 9306 -e "SELECT * FROM account limit 1;"
             podman rm -f searchd
           }
 
-          if [ $( sed -E -e 's#[^/]##g' <<< ${{ inputs.platforms }} ) != "/" ]; then
+          if [ $( sed -E -e 's#[^/]##g' <<< $platforms ) != "/" ]; then
             # if we are here, user has selected more than one build platform
-            arch_tags=$( tr ',' ' ' <<< ${{ inputs.platforms }} | tr -d '/' )
+            arch_tags=$( tr ',' ' ' <<< $platforms | tr -d '/' )
             # removed slashes to produce "linuxamd64 linuxs390x linuxppc64le"
             for tag in $arch_tags; do test_tag -$tag; done
           else