Add accepted label and comments

* comment on how the workflows are foreseen to be used, namely
  on:
    push:
      branches:
        - "async-v*"

* add back creation of an "accepted" label

.github/workflows/async-create-label.yml

@@ -1,6 +1,7 @@
 ---
-name: Create label for new async branch or tag
+name: Create label for new async branch
 
+# Foreseen to be used when async-v* branches are pushed in repos that include this workflow
 'on':
   workflow_call:
 
@@ -11,25 +12,20 @@ jobs:
   print-labels:
     name: Print labels
     runs-on: ubuntu-latest
-    # only run if the created branch or tag starts with the correct pattern, namely "async-"
-    if: startsWith(github.ref, 'refs/heads/async-v') || startsWith(github.ref, 'refs/tags/async-v')
+    # only run if the created branch or tag starts with the correct pattern, namely "async-v"
+    # while the workflow is supposed to only run when branches like async-v* are created (to be filtered in downstream repos),
+    # we add this check to make sure we don't see any surprises in case filters are forgotten or wrongly implemented
+    if: startsWith(github.ref, 'refs/heads/async-v')
     steps:
-      - name: Create async branch or tag label
+      - name: Create async branch label
         env:
           GH_TOKEN: ${{ github.token }}
           ref: ${{ github.ref }}
 
         id: create_label
         run: |
           # to be on the safe side, check the full ref
-          case "${ref}" in
-            refs/heads/*) what_am_i=branch
-            ;;
-            refs/tags/*) what_am_i=tag
-            ;;
-            *) echo "Invalid ref ${ref}, abort." && exit 1
-            ;;
-          esac
           # extract only the branch or tag pattern we are really interested in
           ref="${ref##*/}"
-          gh label create --repo "${GITHUB_REPOSITORY}" "${ref}" --description "Concerns ${what_am_i} ${ref}" --color 95C6F0
+          gh label create --repo "${GITHUB_REPOSITORY}" "${ref}" --description "Request cherry-picks for branch ${ref}" --color 95C6F0
+          gh label create --repo "${GITHUB_REPOSITORY}" "${ref}" --description "Accepted requests on branch ${ref}" --color 95C6F0

.github/workflows/async-update.yml

@@ -1,6 +1,7 @@
 ---
 name: Update when async branch is pushed
 
+# Foreseen to be used when async-v* branches are pushed in repos that include this workflow
 'on':
   workflow_call:
 
@@ -11,7 +12,9 @@ jobs:
   update:
     name: Update everything
     runs-on: ubuntu-latest
-    # only run if the created branch or tag starts with the correct pattern, namely "async-"
+    # only run if the created branch or tag starts with the correct pattern, namely "async-v"
+    # while the workflow is supposed to only run when branches like async-v* are created (to be filtered in downstream repos),
+    # we add this check to make sure we don't see any surprises in case filters are forgotten or wrongly implemented
     if: startsWith(github.ref, 'refs/heads/async-v')
     steps:
       - name: Update, remove labels, publish table
@@ -71,8 +74,8 @@ jobs:
               if [[ -z "${pr_url}" ]] ; then
                 echo "Publish this without a linked PR"
               else
-                # remove the label (if any)
-                gh --repo "${GITHUB_REPOSITORY}" pr edit "${pr_url}" --remove-label "${branch_name}"
+                # add corresponding "accepted" label
+                gh --repo "${GITHUB_REPOSITORY}" pr edit "${pr_url}" --add-label "${branch_name}-accepted"
                 echo "Publish this with linked PR"
               fi
               # reset the SHAs