90 lines
3.0 KiB
JavaScript
90 lines
3.0 KiB
JavaScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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// This script uses `console` to print messages to the user.
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// tslint:disable:no-console
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const https = require('https');
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const util = require('util');
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const child_process = require('child_process');
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const exec = util.promisify(child_process.exec);
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async function requestDataFromGithub(url) {
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// GitHub requires a user agent: https://developer.github.com/v3/#user-agent-required
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const options = {headers: {'User-Agent': 'angular'}};
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return new Promise((resolve, reject) => {
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https
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.get(
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url, options,
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(res) => {
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const {statusCode} = res;
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const contentType = res.headers['content-type'];
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let rawData = '';
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res.on('data', (chunk) => { rawData += chunk; });
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res.on('end', () => {
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let error;
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if (statusCode !== 200) {
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error = new Error(
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`Request Failed.\nStatus Code: ${statusCode}.\nResponse: ${rawData}`);
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} else if (!/^application\/json/.test(contentType)) {
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error = new Error(
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'Invalid content-type.\n' +
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`Expected application/json but received ${contentType}`);
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}
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if (error) {
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reject(error);
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return;
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}
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try {
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resolve(JSON.parse(rawData));
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} catch (e) {
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reject(e);
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}
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});
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})
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.on('error', (e) => { reject(e); });
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});
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}
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module.exports = async function getRefsAndShasForTarget(prNumber) {
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console.log(`Getting refs and SHAs for PR ${prNumber} on angular/angular.`);
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const pullsUrl = `https://api.github.com/repos/angular/angular/pulls/${prNumber}`;
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const result = await requestDataFromGithub(pullsUrl);
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// Ensure the base ref is up to date
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await exec(`git fetch origin ${result.base.ref}`);
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// The sha of the latest commit on the target branch.
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const {stdout: latestShaOfTargetBranch} = await exec(`git rev-parse origin/${result.base.ref}`);
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// The sha of the latest commit on the PR.
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const {stdout: latestShaOfPrBranch} = await exec(`git rev-parse HEAD`);
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// The first common SHA in the history of the target branch and the latest commit in the PR.
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const {stdout: commonAncestorSha} =
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await exec(`git merge-base origin/${result.base.ref} ${latestShaOfPrBranch}`);
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const output = {
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base: {
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ref: result.base.ref,
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sha: result.base.sha,
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},
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head: {
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ref: result.head.ref,
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sha: result.head.sha,
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},
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commonAncestorSha: commonAncestorSha.trim(),
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latestShaOfTargetBranch: latestShaOfTargetBranch.trim(),
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latestShaOfPrBranch: latestShaOfPrBranch.trim(),
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};
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return output;
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};
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