| 1234567891011121314151617181920212223242526272829303132333435 | language: node_jsnode_js:  - "0.10"  - "0.12"  - "4"  - "6"  - "8"sudo: false# use g++-4.8 for karmacache:  - aptaddons:  apt:    sources:      - ubuntu-toolchain-r-test    packages:      - g++-4.8      - libstdc++-4.8-dev  firefox: "39.0"before_install:  - export CXX="g++-4.8" CC="gcc-4.8"  - export "PATH=./node_modules/.bin:$PATH"install: npm install# start X server for firefoxbefore_script:  - "export DISPLAY=:99.0"  - "sh -e /etc/init.d/xvfb start"  - sleep 3 # give xvfb some time to startscript:  - gulp lint  - gulp dist  - gulp test karmaafter_success:  - gulp coveralls
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