chore: add lint job to travis

.travis.yml

@@ -37,6 +37,7 @@ env:
   matrix:
     # Order: a slower build first, so that we don't occupy an idle travis worker waiting for others to complete.
    - CI_MODE=js
+   - CI_MODE=lint
 #   - CI_MODE=dart
    - CI_MODE=build_only
    - CI_MODE=saucelabs_required

scripts/ci-lite/lint.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+set -ex -o pipefail
+
+if [[ ${TRAVIS} && ${CI_MODE} != "lint" ]]; then
+  exit 0;
+fi
+
+
+echo 'travis_fold:start:lint'
+
+gulp lint
+gulp check-format
+
+echo 'travis_fold:end:lint'

scripts/ci-lite/test.sh

@@ -9,6 +9,7 @@ cd `dirname $0`
 source ./env.sh
 cd ../..
 
+./scripts/ci-lite/lint.sh
 ./scripts/ci-lite/test_js.sh
 ./scripts/ci-lite/test_build_only.sh
 ./scripts/ci-lite/test_saucelabs.sh