Allow to run CI on external contributions (#254) (#255)

Signed-off-by: Mario Dominguez <mariodominguez@eprosima.com>
(cherry picked from commit abf6c9a)

Co-authored-by: Mario Domínguez López <116071334+Mario-DL@users.noreply.github.com>

Author: mergify[bot]

.github/workflows/reusable-ci.yml

@@ -47,6 +47,11 @@ on:
         required: false
         type: boolean
         default: false
+      add-label:
+        description: 'Add the ci-pending label to the PR'
+        required: false
+        type: boolean
+        default: false
 env:
     toolset: ${{ inputs.vs-toolset && format('-T {0}', inputs.vs-toolset) || '' }}
 defaults:
@@ -65,7 +70,7 @@ jobs:
 
     steps:
     - name: Add ci-pending label if PR
-      if: ${{ github.event_name == 'pull_request' }}
+      if: ${{ github.event_name == 'pull_request' && inputs.add-label == true}}
       uses: eProsima/eProsima-CI/external/add_labels@v0
       with:
         labels: ci-pending

.github/workflows/ubuntu-ci.yml

@@ -63,3 +63,4 @@ jobs:
       run-build: ${{ !(github.event_name == 'pull_request') || !contains(github.event.pull_request.labels.*.name, 'skip-ci') }}
       run-tests: ${{ (inputs.run-tests == true) || ((github.event_name == 'pull_request') && (!contains(github.event.pull_request.labels.*.name, 'no-test'))) }}
       use-ccache: ${{ inputs.use-ccache || false }}
+      add-label: ${{ (github.event_name == 'pull_request') && (github.event.pull_request.head.repo.full_name == github.repository) && true || false }}