fix: only enable automerge dependencies on on open / reopen

Only enable the automerge when the PR is opened or reopened,
but not if e.g. rebased or pushed. This is needed if the PR
is known bad and you try to fix it, but in the meantime its automerged,
even if you disabled it.

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

Author: susnux

workflow-templates/dependabot-approve-merge.yml

@@ -53,6 +53,6 @@ jobs:
       # Enable GitHub auto merge
       - name: Auto merge
         uses: alexwilson/enable-github-automerge-action@56e3117d1ae1540309dc8f7a9f2825bc3c5f06ff # v2.0.0
-        if: startsWith(steps.branchname.outputs.branch, 'dependabot/')
+        if: startsWith(steps.branchname.outputs.branch, 'dependabot/') && (github.event.pull_request.action == 'opened' || github.event.pull_request.action == 'reopened')
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}

workflow-templates/renovate-approve-merge.yml

@@ -53,6 +53,6 @@ jobs:
       # Enable GitHub auto merge
       - name: Auto merge
         uses: alexwilson/enable-github-automerge-action@56e3117d1ae1540309dc8f7a9f2825bc3c5f06ff # v2.0.0
-        if: startsWith(steps.branchname.outputs.branch, 'renovate/')
+        if: startsWith(steps.branchname.outputs.branch, 'renovate/') && (github.event.pull_request.action == 'opened' || github.event.pull_request.action == 'reopened')
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}