grantmcconnaughey / env-ci

Get environment variables exposed by CI services

env-ci

Get environment variables exposed by CI services.

Adapted from codecov-node.

Install

$ npm install --save env-ci

Usage

const envCi = require('env-ci');

const {isCi, name, service, commit, build, buildUrl, branch, job, jobUrl, pr, isPr, slug, root} = envCi();

if (isCI) {
  console.log(`Building branch ${branch} of repo ${slug} on ${name}`);

  if (isPr) {
    console.log(`Building Pull Request #${pr}`);
  }

  if (service === 'travis') {
    // Do something specific to Travis CI
  }
}

Variables

Variable	Description
isCi	true is running on a CI, false otherwise
name	CI service Commercial name (e.g. Travis CI, CircleCI, GitLab CI/CD)
service	Standardized CI service name (e.g. travis, circleci, gitlab)
commit	Commit sha that triggered the CI build
build	CI service build number
buildUrl	Link to the CI service build
branch	Git branch being built or targeted by a pull request
job	CI service job number
jobUrl	Link to the CI service job
pr	Pull Request number
isPr	true is the build has been triggered by a Pull Request, false otherwise
slug	The slug (in form: owner_name/repo_name) of the repository currently being built.
root	The path to the directory where the repository is being built

Supported CI

CI Service (name)	service	isCi	commit	build	buildUrl	branch	job	jobUrl	pr	isPr	slug	root
AppVeyor	appveyor	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅
Bamboo	bamboo	✅	✅	✅	✅	✅	✅	❌	❌	❌	❌	✅
Bitbucket	bitbucket	✅	✅	✅	✅	✅	❌	❌	❌	❌	✅	✅
Bitrise	bitrise	✅	✅	✅	✅	✅	❌	❌	✅	✅	✅	❌
Buildkite	buildkite	✅	✅	✅	✅	✅	❌	❌	✅	✅	✅	✅
CircleCI	circleci	✅	✅	✅	✅	✅	✅	❌	✅	✅	✅	❌
AWS CodeBuild	codebuild	✅	✅	✅	✅	✅	❌	❌	❌	❌	❌	✅
Codeship	codeship	✅	✅	✅	✅	✅	❌	❌	❌	❌	✅	❌
Drone	drone	✅	✅	✅	❌	✅	✅	❌	✅	✅	✅	❌
Gitlab CI/CD	gitlab	✅	✅	✅	✅	✅	✅	✅	❌	❌	✅	✅
Jenkins	jenkins	✅	✅	✅	✅	✅	❌	❌	❌	❌	✅	✅
Semaphore	semaphore	✅	✅	✅	❌	✅	✅	❌	✅	✅	✅	✅
Shippable	shippable	✅	✅	✅	✅	✅	✅	❌	✅	✅	✅	✅
TeamCity	teamcity	✅	✅	✅	❌	✅	❌	❌	❌	❌	✅	✅
Travis CI	travis	✅	✅	✅	❌	✅	✅	❌	✅	✅	✅	✅
Wercker	wercker	✅	✅	✅	✅	✅	❌	❌	❌	❌	✅	✅

If none of the above CI services is detected, commit and branch are determined based on the local Git repository, and isCi is determined based on the CI environment variable.

Caveats

Git branch determination

Certain CI services don't provide an environment variable to determine the current Git branch being built. In such cases the branch is determined with the command git rev-parse --abbrev-ref HEAD.

However, if the local repository is in a detached head state the branch cannot be determined directly. In such case, env-ci will look for the remote branches having the same HEAD as the local detached HEAD to determine the branch from which the detached HEAD was created.

In the rare case where there is multiple remote branches with the same HEAD as the local detached HEAD, env-ci will arbitrarily pick the first one. This can lead to an inaccurate branch value for certain CI services in such circumstances.

Affected CI services:

• AWS CodeBuild