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#!/usr/bin/env node
// Output some `export` commands with a few extra environment variables. They'll be evaluated
// into the build environment and available for use in later steps.
const github = require('@octokit/rest')();
const {execSync} = require('child_process');
const pr = process.env['CIRCLE_PULL_REQUEST'];
if (pr) {
const number = +pr.match(/\/(\d+)\/?$/)[1];
return github.pullRequests.get({
owner: 'mapbox',
repo: 'mapbox-gl-native',
number
}).then(({data}) => {
const base = data.base.ref;
const head = process.env['CIRCLE_SHA1'];
const mergeBase = execSync(`git merge-base origin/${base} ${head}`).toString().trim();
console.log(`export CIRCLE_TARGET_BRANCH=${base}`);
console.log(`export CIRCLE_MERGE_BASE=${mergeBase}`);
});
} else {
const head = process.env['CIRCLE_SHA1'];
for (const sha of execSync(`git rev-list --max-count=500 ${head}`).toString().trim().split('\n')) {
const base = execSync(`git branch -r --contains ${sha} origin/master origin/release-*`).toString().split('\n')[0].trim().replace(/^origin\//, '');
if (base) {
const mergeBase = execSync(`git merge-base origin/${base} ${head}`).toString().trim();
console.log(`export CIRCLE_TARGET_BRANCH=${base}`);
console.log(`export CIRCLE_MERGE_BASE=${mergeBase}`);
break;
}
}
}
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