Run Travis every time, but exit early without trigger, tag or relevant changes

Author: radarhere

.travis.yml

@@ -1,5 +1,3 @@
-if: tag IS present
-
 env:
   global:
       - CONFIG_PATH=wheels/config.sh
@@ -112,6 +110,12 @@ jobs:
         - MB_PYTHON_VERSION=3.12
 
 before_install:
+    - if [[ "$TRAVIS_TAG" == "" && "$TRAVIS_EVENT_TYPE" != "api" ]]; then
+        CHANGED_FILES=$(git diff --name-only HEAD~1...HEAD);
+        if ! [[ "$CHANGED_FILES" =~ .github/workflows/wheels*.yml || "$CHANGED_FILES" =~ wheels/* ]]; then
+          travis_terminate 0;
+        fi
+      fi
     - source wheels/multibuild/common_utils.sh
     - source wheels/multibuild/travis_steps.sh
     - before_install