Add fast fail for branch builds too

[av skip]

contrib/travis_fastfail.sh

@@ -1,11 +1,26 @@
 #!/bin/sh
 
+curlhdr="Accept: application/vnd.travis-ci.2+json"
+endpoint="https://api.travis-ci.org/repos/$TRAVIS_REPO_SLUG"
+
 # Fail fast for superseded builds to PR's
 if ! [ "$TRAVIS_PULL_REQUEST" = "false" ]; then
-    if ! [ \"$TRAVIS_BUILD_NUMBER\" = $(curl -H "Accept: application/vnd.travis-ci.2+json" \
-          https://api.travis-ci.org/repos/JuliaLang/julia/builds?event_type=pull_request | \
-          jq ".builds | map(select(.pull_request_number == $TRAVIS_PULL_REQUEST))[0].number") ]; then
-        echo "There are newer queued builds for this pull request, failing early."
-        exit 1
-    fi
+  if ! [ \"$TRAVIS_BUILD_NUMBER\" = $(curl -H "$curlhdr" $endpoint/builds?event_type=pull_request | \
+      jq ".builds | map(select(.pull_request_number == $TRAVIS_PULL_REQUEST))[0].number") ]; then
+    echo "There are newer queued builds for this pull request, failing early."
+    exit 1
+  fi
 fi
+
+# And for non-latest push builds in branches other than master or release*
+case $TRAVIS_BRANCH in
+  master | release*)
+    ;;
+  *)
+    if ! [ \"$TRAVIS_BUILD_NUMBER\" = $(curl -H "$curlhdr" \
+        $endpoint/branches/$TRAVIS_BRANCH | jq ".branch.number") ]; then
+      echo "There are newer queued builds for this branch, failing early."
+      exit 1
+    fi
+    ;;
+esac