Run eslint on Travis.

See #773.

.travis.yml

@@ -22,6 +22,7 @@ env:
     - TESTENV=pyroma
     - TESTENV=check-manifest
     - TESTENV=pylint
+    - TESTENV=eslint
 
 # Not really, but this is here so we can do stuff by hand.
 language: c
@@ -63,3 +64,5 @@ matrix:
       env: TESTENV=check-manifest
     - os: osx
       env: TESTENV=pylint
+    - os: osx
+      env: TESTENV=eslint

scripts/dev/ci_install.py

@@ -88,8 +88,9 @@ if 'APPVEYOR' in os.environ:
 
     check_setup(r'C:\Python34\python')
 elif TRAVIS_OS == 'linux':
-    print("sudo pip install tox")
+    if TESTENV != 'eslint':
-    subprocess.check_call(['sudo', 'pip', 'install', 'tox'])
+        print("sudo pip install tox/npm")
+        subprocess.check_call(['sudo', 'pip', 'install', 'tox'])
 
     print("Installing packages...")
     pkgs = []
@@ -98,13 +99,19 @@ elif TRAVIS_OS == 'linux':
         pkgs.append('xvfb')
     if INSTALL_PYQT:
         pkgs += ['python3-pyqt5', 'python3-pyqt5.qtwebkit']
+    if TESTENV == 'eslint':
+        pkgs += ['npm', 'nodejs']
 
     if pkgs:
         print("apt-get update...")
         apt_get(['update'])
         print("apt-get install...")
         apt_get(['install'] + pkgs)
-    check_setup('python3')
+
+    if TESTENV == 'eslint':
+        subprocess.check_call(['sudo', 'npm', 'install', '-g', 'eslint'])
+    else:
+        check_setup('python3')
 elif TRAVIS_OS == 'osx':
     print("brew update...")
     brew(['update'], silent=True)

scripts/dev/ci_run.py

@@ -53,7 +53,9 @@ if travis_os == 'linux' and testenv == 'py35':
 elif travis_os == 'osx' and testenv == 'py34':
     raise Exception("Can't run py34 on OS X")
 
-if testenv == 'py34' and travis_os == 'linux':
+if testenv == 'eslint':
+    subprocess.check_call(['eslint', 'qutebrowser'])
+elif testenv == 'py34' and travis_os == 'linux':
     subprocess.check_call(['xvfb-run', '-s', '-screen 0 640x480x16',
                            'tox', '-e', testenv])
 else: