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August 27, 2024 06:11
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| #!/usr/bin/env deno run --allow-env --allow-read --allow-run | |
| // Was this file modified in any PR? | |
| import { readline } from "https://deno.land/x/readline@v1.1.0/mod.ts"; | |
| declare global { | |
| export const Deno: any; | |
| export interface ArrayConstructor { | |
| fromAsync<T>(asyncIterable: AsyncIterable<T>): Promise<T[]>; | |
| } | |
| } | |
| async function* $(cmd: string[]) { | |
| const process = Deno.run({ | |
| cmd, | |
| stdout: "piped", | |
| stderr: "piped", | |
| stdin: "piped", | |
| }); | |
| for await (const line of readline(process.stdout)) { | |
| yield new TextDecoder().decode(line) as string; | |
| } | |
| } | |
| async function $lines(cmd: string[]): Promise<string[]> { | |
| const lines = await Array.fromAsync($(cmd)); | |
| return lines[lines.length - 1] === "" ? lines.slice(0, -1) : lines; | |
| } | |
| // | |
| async function getRemoteBranches() { | |
| return await $lines([ | |
| "git", | |
| "for-each-ref", | |
| "--format", | |
| "%(refname)", | |
| "refs/remotes/origin", | |
| ]); | |
| } | |
| interface Pr { | |
| owner: string; | |
| repo: string; | |
| number: number; | |
| commit: string; | |
| } | |
| async function getPrsByBranches() { | |
| // gh pr list --json headRefName | |
| const responseText = ( | |
| await $lines([ | |
| "gh", | |
| "pr", | |
| "list", | |
| "--json", | |
| "headRepositoryOwner,headRepository,number,headRefName,headRefOid", | |
| ]) | |
| ).join(); | |
| const responseJson = JSON.parse(responseText); | |
| return Object.fromEntries<Pr>( | |
| responseJson.map((pr: any) => [ | |
| "refs/remotes/origin/" + pr.headRefName, | |
| { | |
| owner: pr.headRepositoryOwner.login, | |
| repo: pr.headRepository.name, | |
| number: pr.number, | |
| commit: pr.headRefOid, | |
| }, | |
| ]), | |
| ); | |
| } | |
| async function getChangedFiles(branch: string) { | |
| return await $lines([ | |
| "git", | |
| "diff", | |
| "--name-only", | |
| branch, | |
| "refs/remotes/origin/main", | |
| ]); | |
| } | |
| async function* getAllChangedFiles(branches: string[]) { | |
| for (const branch of branches) { | |
| for (const path of await getChangedFiles(branch)) { | |
| yield { branch, path } as ChangedFile; | |
| } | |
| } | |
| } | |
| interface ChangedFile { | |
| branch: string; | |
| path: string; | |
| } | |
| interface ChangedFileDb { | |
| [path: string]: string[] | undefined; | |
| } | |
| function insertChangedFile(db: ChangedFileDb, file: ChangedFile) { | |
| if (db[file.path] == null) { | |
| db[file.path] = []; | |
| } | |
| db[file.path]!.push(file.branch); | |
| } | |
| async function makeChangedFilesDb(branches: string[]) { | |
| const db: ChangedFileDb = {}; | |
| for await (const changedFile of getAllChangedFiles(branches)) { | |
| insertChangedFile(db, changedFile); | |
| } | |
| return db; | |
| } | |
| function prUrl(pr: Pr) { | |
| return `https://github.com/${pr.owner}/${pr.repo}/pull/${pr.number}/files`; | |
| } | |
| function fileHistoryAtUrl(pr: Pr, path: string) { | |
| return `https://github.com/${pr.owner}/${pr.repo}/commits/${pr.commit.slice(0, 7)}/${path}`; | |
| } | |
| async function main(path?: string) { | |
| const prs = await getPrsByBranches(); | |
| const branches = Object.keys(prs); | |
| const db = await makeChangedFilesDb(branches); | |
| if (path == null) { | |
| for (const [path, branches] of Object.entries(db)) { | |
| console.log(path); | |
| for (const branch of branches!) { | |
| console.log(` ${prUrl(prs[branch]!)}`); | |
| } | |
| } | |
| } else { | |
| for (const branch of db[path] ?? []) { | |
| const pr = prs[branch]!; | |
| console.log(`This file was modified in PR #${pr.number}:`); | |
| console.log(prUrl(pr)); | |
| console.log(fileHistoryAtUrl(pr, path)); | |
| } | |
| } | |
| } | |
| await main(...Deno.args); |
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