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https://github.com/vercel/next.js.git
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Sebastian "Sebbie" Silbermann
027205875b
The previous detection mechanism special-cased `canary` which lead to large diffs when backport branches ran CI. We stop special casing `canary` reducing complexity and giving us another flake-detecting attempt when the change is merged. That way we can safely enable flake detection on backport branches without having to test large diffs when PRs are merged targetting backport branches. New backport branches will no longer have flake detecton and new deploy test runs disabled.
81 lines
2.5 KiB
JavaScript
81 lines
2.5 KiB
JavaScript
// @ts-check
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import fs from 'fs/promises'
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import { promisify } from 'util'
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import { exec as execOrig } from 'child_process'
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const exec = promisify(execOrig)
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/**
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* Gets git repository information from the environment
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* @returns {Promise<{branchName: string, remoteUrl: string, commitSha: string}>}
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*/
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export async function getGitInfo() {
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let eventData = {}
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try {
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eventData =
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JSON.parse(
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await fs.readFile(process.env.GITHUB_EVENT_PATH || '', 'utf8')
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)['pull_request'] || {}
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} catch (_) {}
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const branchName =
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eventData?.head?.ref ||
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process.env.GITHUB_REF_NAME ||
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(await exec('git rev-parse --abbrev-ref HEAD')).stdout.trim()
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const remoteUrl =
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eventData?.head?.repo?.full_name ||
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process.env.GITHUB_REPOSITORY ||
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(await exec('git remote get-url origin')).stdout.trim()
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const commitSha =
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eventData?.head?.sha ||
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process.env.GITHUB_SHA ||
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(await exec('git rev-parse HEAD')).stdout.trim()
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return { branchName, remoteUrl, commitSha }
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}
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/**
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* Determines the appropriate git diff revision based on the environment
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* @returns {Promise<string>} The git revision to diff against
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*/
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export async function getDiffRevision() {
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if (process.env.GITHUB_ACTIONS === 'true') {
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const eventName = process.env.GITHUB_EVENT_NAME
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switch (eventName) {
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// GH Actions for `pull_request` run on the merge commit by default so HEAD~1:
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// 1. includes all changes in the PR
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// e.g. in
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// A-B-C-main - F
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// \ /
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// D-E-branch
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// GH actions for `branch` runs on F, so a diff for HEAD~1 includes the diff of D and E combined
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// 2. Includes all changes of the commit for pushes (assuming the push event is from a squash merge)
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case 'pull_request':
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case 'push':
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return 'HEAD~1'
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default:
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throw new Error(`Unsupported GITHUB_EVENT_NAME: ${eventName}`)
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}
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} else {
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try {
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await exec('git remote set-branches --add origin canary')
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await exec('git fetch origin canary --depth=20')
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} catch (err) {
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const remoteInfo = await exec('git remote -v')
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console.error(remoteInfo.stdout)
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console.error(remoteInfo.stderr)
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console.error(`Failed to fetch origin/canary`, err)
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}
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// TODO: We should diff against the merge base with origin/canary not directly against origin/canary.
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// A --- B ---- origin/canary
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// \
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// \-- C ---- HEAD
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// `git diff origin/canary` includes B and C
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// But we should only include C.
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return 'origin/canary'
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}
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}
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