detect TeamCity

[otakusid]

it would be good to disable coloring if process runes from TeamCity. Here is node -p 'process.env' output from TeamCity build step:

{
TEAMCITY_BUILD_PROPERTIES_FILE: '/opt/teamcity/buildagetnt/temp/buildTmp/teamcity.build2602458914988989541.properties',
TERM: 'linux',
JRE_17_x64: '/usr/lib/jvm/jre',
TMPDIR: '/opt/teamcity/buildagetnt/temp/buildTmp',
TEAMCITY_CAPTURE_ENV: '"/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.85.x86_64/jre/bin/java" -jar "/opt/teamcity/buildagetnt/plugins/environment-fetcher/bin/env-fetcher.jar"',
TEAMCITY_VERSION: '9.0.5 (build 32523)',
JRE_HOME: '/usr/bin/..',
TEMP: '/opt/teamcity/buildagetnt/temp/buildTmp',
TEAMCITY_BUILDCONF_NAME: 'api api',
BUILD_VCS_NUMBER: '95fb89fd9d28',
NLSPATH: '/usr/dt/lib/nls/msg/%L/%N.cat',
PATH: '/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin:/usr/local/lib',
RUNLEVEL: '3',
runlevel: '3',
_: '/usr/bin/node',
PWD: '/opt/teamcity/buildagetnt/work/abeaf100e9e82338',
LANGSH_SOURCED: '1',
DOCKER_CONFIG: '/usr/local/etc/.docker',
TEAMCITY_GIT_PATH: '/usr/bin/git',
LANG: 'en_US.UTF-8',
PREVLEVEL: 'N',
previous: 'N',
XFILESEARCHPATH: '/usr/dt/app-defaults/%L/Dt',
CONSOLETYPE: 'serial',
BUILD_VCS_NUMBER_feedbackforum_feedbackforumapi: '95fb89fd9d28',
HOME: '/root/',
SHLVL: '4',
TEAMCITY_PROCESS_FLOW_ID: '818047604373',
UPSTART_INSTANCE: '',
TMP: '/opt/teamcity/buildagetnt/temp/buildTmp',
UPSTART_EVENTS: 'runlevel',
BUILD_NUMBER: '150',
JRE_17: '/usr/lib/jvm/jre',
UPSTART_JOB: 'rc',
TEAMCITY_PROJECT_NAME: '10 tests',
COMPOSER_HOME: '/usr/local/bin',
TEAMCITY_PROCESS_PARENT_FLOW_ID: ''
}

In similar situation xUnit runner uses TEAMCITY_PROJECT_NAME env variable to detect that it running from TeamCity

[Qix-]

What's TeamCity? We don't want to have a bunch of service-specific checks because frankly that should be configured on TeamCity's end.

[sindresorhus]

@Qix- It's a CI. I don't see why we can't handle situations like this gracefully.

[Qix-]

It's more branching and stuff that isn't specific to this module. Theoretically team city should specify a dummy terminal.

[Qix-]

So what if 5 other CIs have this problem? Do we support all of them, too?...

[sindresorhus]

@Qix- Only if they request it. I find this useful as I use this to detect whether colors are supported and CI's return false positives and the output get's so messy. I'd rather fix it here than in every module.

[Qix-]

Or hold CI's accountable and have them fix it :)

[sindresorhus]

@Qix- In a perfect world, yes. I used to think that way too, but in reality they never do and you always just end up having to implement workarounds in every module...

This should cover most of them though: 9170da9