Enable run of CI on branches.

Protect check from missing value when run on 'master' branch.

Author: godunko

.gitlab-ci.yml

@@ -9,10 +9,6 @@ stages:
 # Build and test with ANOD
 # TODO: add a build and test based on Alire in parallel to this.
 build_and_test:
-  rules:
-    # Let's do the job only for merge request events: that's
-    # when we know whether the target branch is 'edge'.
-    - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
   services:
      - image:sandbox
      - cpu:8
@@ -26,7 +22,7 @@ build_and_test:
     # Check whether we're in an MR targeting 'edge' and setup some
     # variables if so.
     - TARGET_BRANCH="master"
-    - if [ "$CI_MERGE_REQUEST_TARGET_BRANCH_NAME" = "edge" ]; then
+    - if [ "x$CI_MERGE_REQUEST_TARGET_BRANCH_NAME" = "xedge" ]; then
           echo "Targeting the edge branch." ;
           REPO_SUFFIX="-edge" ;
           BUILD_SPACE_SUFFIX="_edge" ;