simple-email/node_modules/env-ci/services/shippable.js

// http://docs.shippable.com/ci/env-vars/#stdEnv

module.exports = {
	detect({env}) {
		return Boolean(env.SHIPPABLE);
	},
	configuration({env}) {
		const pr = env.IS_PULL_REQUEST === 'true' ? env.PULL_REQUEST : undefined;
		const isPr = Boolean(pr);

		return {
			name: 'Shippable',
			service: 'shippable',
			commit: env.COMMIT,
			tag: env.GIT_TAG_NAME,
			build: env.BUILD_NUMBER,
			buildUrl: env.BUILD_URL,
			branch: isPr ? env.BASE_BRANCH : env.BRANCH,
			job: env.JOB_NUMBER,
			pr,
			isPr,
			prBranch: isPr ? env.HEAD_BRANCH : undefined,
			slug: env.SHIPPABLE_REPO_SLUG,
			root: env.SHIPPABLE_BUILD_DIR,
		};
	},
};