Selectively run tests depending on location of code change

Signed-off-by: GuessWhoSamFoo <foos@vmware.com>

.travis.yml

@@ -39,21 +39,11 @@ addons:
   apt:
     packages:
     - rpm
-# TODO: Update goreleaser.yml and add when open sourced
-#    - snapd
-#
-
-# TODO: Enable for snapd
-#env:
-#- PATH=/snap/bin:$PATH
-#
-#install:
-#- sudo snap install snapcraft --classic
 
 before_script:
   - nvm install $(cat .nvmrc)
   - make go-install
 script:
-- make ci
+- $TRAVIS_BUILD_DIR/hacks/test-runner.sh
 # choco install scripts points to private GH repo but windows cannot have secure env
 # - if [[ $TRAVIS_OS_NAME == 'windows' ]]; then ./ci/travis-choco.sh; fi

hacks/test-runner.sh

+#!/bin/bash
+
+set -euxo pipefail
+
+FRONTEND="web" # Specify multiple directory names separated by space
+BUILD_FRONTEND=0
+IGNORE_FILES=$(ls -p | grep -v /)
+
+is_updated() {
+    GIT_DIFF=$(git --no-pager diff --name-only HEAD~1 | sort -u | awk 'BEGIN {FS="/"} {print $1}' | uniq); 
+    export CHANGED=$GIT_DIFF
+}
+
+should_build() {
+    WATCH=($(echo "$FRONTEND" | tr ' ' '\n'))
+    is_updated
+    MODIFIED=($(echo "$CHANGED"))
+    for j in "${WATCH[@]}"
+    do
+        for k in "${MODIFIED[@]}"
+	do
+            if [[ $j = $k ]]; then
+                BUILD_FRONTEND=1
+	    fi
+	done
+    done
+}
+
+if [[ $TRAVIS_BRANCH == 'master' ]]; then
+    make ci
+else
+  should_build
+  if [[ $BUILD_FRONTEND == 0 ]]; then
+      # Backend tests only
+      make test vet sugarloaf-dev
+  else
+    make web-test web-build
+  fi
+fi
+
+exit $?