1#!/usr/bin/env node --redirect-warnings=/dev/null
2
3const { execFileSync } = require("child_process");
4let { GITHUB_ACCESS_TOKEN } = process.env;
5const GITHUB_URL = "https://github.com";
6const SKIPPABLE_NOTE_REGEX = /^\s*-?\s*n\/?a\s*/ims;
7const PULL_REQUEST_WEB_URL = "https://github.com/zed-industries/zed/pull";
8const PULL_REQUEST_API_URL =
9 "https://api.github.com/repos/zed-industries/zed/pulls";
10const DIVIDER = "-".repeat(80);
11
12main();
13
14async function main() {
15 // Get the last two preview tags
16 const [newTag, oldTag] = execFileSync(
17 "git",
18 ["tag", "--sort", "-committerdate"],
19 { encoding: "utf8" },
20 )
21 .split("\n")
22 .filter((t) => t.startsWith("v") && t.endsWith("-pre"));
23
24 // Print the previous release
25 console.log(`Changes from ${oldTag} to ${newTag}\n`);
26
27 if (!GITHUB_ACCESS_TOKEN) {
28 try {
29 GITHUB_ACCESS_TOKEN = execFileSync("gh", ["auth", "token"]).toString();
30 } catch (error) {
31 console.log(error);
32 console.log("No GITHUB_ACCESS_TOKEN, and no `gh auth token`");
33 process.exit(1);
34 }
35 }
36
37 // Get the PRs merged between those two tags.
38 const pullRequestNumbers = getPullRequestNumbers(oldTag, newTag);
39
40 // Get the PRs that were cherry-picked between main and the old tag.
41 const existingPullRequestNumbers = new Set(
42 getPullRequestNumbers("main", oldTag),
43 );
44
45 // Filter out those existing PRs from the set of new PRs.
46 const newPullRequestNumbers = pullRequestNumbers.filter(
47 (number) => !existingPullRequestNumbers.has(number),
48 );
49
50 // Fetch the pull requests from the GitHub API.
51 console.log("Merged Pull requests:");
52 console.log(DIVIDER);
53 for (const pullRequestNumber of newPullRequestNumbers) {
54 const pullRequestApiURL = `${PULL_REQUEST_API_URL}/${pullRequestNumber}`;
55
56 const response = await fetch(pullRequestApiURL, {
57 headers: {
58 Authorization: `token ${GITHUB_ACCESS_TOKEN}`,
59 },
60 });
61
62 const pullRequest = await response.json();
63 const releaseNotesHeader = /^\s*Release Notes:(.+)/ims;
64
65 let releaseNotes = pullRequest.body || "";
66 let contributor =
67 pullRequest.user?.login ?? "Unable to identify contributor";
68 const captures = releaseNotesHeader.exec(releaseNotes);
69 let notes = captures ? captures[1] : "MISSING";
70 notes = notes.trim();
71
72 if (SKIPPABLE_NOTE_REGEX.exec(notes) != null) {
73 continue;
74 }
75
76 let credit = getCreditString(pullRequestNumber, contributor);
77
78 console.log(`PR Title: ${pullRequest.title}`);
79 console.log(`Credit: (${credit})`);
80
81 console.log("Release Notes:");
82 console.log();
83 console.log(notes);
84
85 console.log(DIVIDER);
86 }
87}
88
89function getCreditString(pullRequestNumber, contributor) {
90 let credit = "";
91
92 if (pullRequestNumber) {
93 let pullRequestMarkdownLink = `[#${pullRequestNumber}](${PULL_REQUEST_WEB_URL}/${pullRequestNumber})`;
94 credit += pullRequestMarkdownLink;
95 }
96
97 if (contributor) {
98 const contributorMarkdownLink = `[${contributor}](${GITHUB_URL}/${contributor})`;
99 credit += `; thanks ${contributorMarkdownLink}`;
100 }
101
102 return credit;
103}
104
105function getPullRequestNumbers(oldTag, newTag) {
106 const pullRequestNumbers = execFileSync(
107 "git",
108 ["log", `${oldTag}..${newTag}`, "--oneline"],
109 { encoding: "utf8" },
110 )
111 .split("\n")
112 .filter((line) => line.length > 0)
113 .map((line) => {
114 const match = line.match(/#(\d+)/);
115 return match ? match[1] : null;
116 })
117 .filter((line) => line);
118
119 return pullRequestNumbers;
120}