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// Note: This is a GitHub Actions script
// It is not meant to be executed directly on your machine without modifications
const fs = require("fs");
// how far back in time should we consider the changes are "recent"? (default: 24 hours)
const DETECTION_TIME_FRAME = (parseInt(process.env.DETECTION_TIME_FRAME)) || (24 * 3600 * 1000);
async function checkBaseChanges(github, context) {
// query the commit date of the latest commit on this branch
const query = `query($owner:String!, $name:String!, $ref:String!) {
repository(name:$name, owner:$owner) {
ref(qualifiedName:$ref) {
target {
... on Commit { id committedDate oid }
}
}
}
}`;
const variables = {
owner: context.repo.owner,
name: context.repo.repo,
ref: 'refs/heads/master',
};
const result = await github.graphql(query, variables);
const committedAt = result.repository.ref.target.committedDate;
console.log(`Last commit committed at ${committedAt}.`);
const delta = new Date() - new Date(committedAt);
if (delta <= DETECTION_TIME_FRAME) {
console.info('New changes detected, triggering a new build.');
return true;
}
console.info('No new changes detected.');
return false;
}
async function checkCanaryChanges(github, context) {
if (checkBaseChanges(github, context)) return true;
const query = `query($owner:String!, $name:String!, $label:String!) {
repository(name:$name, owner:$owner) {
pullRequests(labels: [$label], states: OPEN, first: 100) {
nodes { number headRepository { pushedAt } }
}
}
}`;
const variables = {
owner: context.repo.owner,
name: context.repo.repo,
label: "canary-merge",
};
const result = await github.graphql(query, variables);
const pulls = result.repository.pullRequests.nodes;
for (let i = 0; i < pulls.length; i++) {
let pull = pulls[i];
if (new Date() - new Date(pull.headRepository.pushedAt) <= DETECTION_TIME_FRAME) {
console.info(`${pull.number} updated at ${pull.headRepository.pushedAt}`);
return true;
}
}
console.info("No changes detected in any tagged pull requests.");
return false;
}
async function tagAndPush(github, owner, repo, execa, commit=false) {
let altToken = process.env.ALT_GITHUB_TOKEN;
if (!altToken) {
throw `Please set ALT_GITHUB_TOKEN environment variable. This token should have write access to ${owner}/${repo}.`;
}
const query = `query ($owner:String!, $name:String!) {
repository(name:$name, owner:$owner) {
refs(refPrefix: "refs/tags/", orderBy: {field: TAG_COMMIT_DATE, direction: DESC}, first: 10) {
nodes { name }
}
}
}`;
const variables = {
owner: owner,
name: repo,
};
const tags = await github.graphql(query, variables);
let lastTag = tags.repository.refs.nodes[0].name;
let tagNumber = /\w+-(\d+)/.exec(lastTag)[1] | 0;
let channel = repo.split('-')[1];
let newTag = `${channel}-${tagNumber + 1}`;
console.log(`New tag: ${newTag}`);
if (commit) {
let channelName = channel[0].toUpperCase() + channel.slice(1);
console.info(`Committing pending commit as ${channelName} #${tagNumber + 1}`);
await execa("git", ['commit', '-m', `${channelName} #${tagNumber + 1}`]);
}
console.info('Pushing tags to GitHub ...');
await execa("git", ['tag', newTag]);
await execa("git", ['remote', 'add', 'target', `https://${altToken}@github.com/${owner}/${repo}.git`]);
await execa("git", ['push', 'target', 'master', '-f']);
await execa("git", ['push', 'target', 'master', '-f', '--tags']);
console.info('Successfully pushed new changes.');
}
async function generateReadme(pulls, context, mergeResults, execa) {
let baseUrl = `https://github.com/${context.repo.owner}/${context.repo.repo}/`;
let output =
"| Pull Request | Commit | Title | Author | Merged? |\n|----|----|----|----|----|\n";
for (let pull of pulls) {
let pr = pull.number;
let result = mergeResults[pr];
output += `| [${pr}](${baseUrl}/pull/${pr}) | [\`${result.rev || "N/A"}\`](${baseUrl}/pull/${pr}/files) | ${pull.title} | [${pull.author.login}](https://github.com/${pull.author.login}/) | ${result.success ? "Yes" : "No"} |\n`;
}
output +=
"\n\nEnd of merge log. You can find the original README.md below the break.\n\n-----\n\n";
output += fs.readFileSync("./README.md");
fs.writeFileSync("./README.md", output);
await execa("git", ["add", "README.md"]);
}
async function fetchPullRequests(pulls, repoUrl, execa) {
console.log("::group::Fetch pull requests");
for (let pull of pulls) {
let pr = pull.number;
console.info(`Fetching PR ${pr} ...`);
await execa("git", [
"fetch",
"-f",
"--no-recurse-submodules",
repoUrl,
`pull/${pr}/head:pr-${pr}`,
]);
}
console.log("::endgroup::");
}
async function mergePullRequests(pulls, execa) {
let mergeResults = {};
console.log("::group::Merge pull requests");
await execa("git", ["config", "--global", "user.name", "citrabot"]);
await execa("git", [
"config",
"--global",
"user.email",
"citra\x40citra-emu\x2eorg", // prevent email harvesters from scraping the address
]);
let hasFailed = false;
for (let pull of pulls) {
let pr = pull.number;
console.info(`Merging PR ${pr} ...`);
try {
const process1 = execa("git", [
"merge",
"--squash",
"--no-edit",
`pr-${pr}`,
]);
process1.stdout.pipe(process.stdout);
await process1;
const process2 = execa("git", ["commit", "-m", `Merge PR ${pr}`]);
process2.stdout.pipe(process.stdout);
await process2;
const process3 = await execa("git", ["rev-parse", "--short", `pr-${pr}`]);
mergeResults[pr] = {
success: true,
rev: process3.stdout,
};
} catch (err) {
console.log(
`::error title=#${pr} not merged::Failed to merge pull request: ${pr}: ${err}`
);
mergeResults[pr] = { success: false };
hasFailed = true;
await execa("git", ["reset", "--hard"]);
}
}
console.log("::endgroup::");
if (hasFailed) {
throw 'There are merge failures. Aborting!';
}
return mergeResults;
}
async function mergebot(github, context, execa) {
const query = `query ($owner:String!, $name:String!, $label:String!) {
repository(name:$name, owner:$owner) {
pullRequests(labels: [$label], states: OPEN, first: 100) {
nodes {
number title author { login }
}
}
}
}`;
const variables = {
owner: context.repo.owner,
name: context.repo.repo,
label: "canary-merge",
};
const result = await github.graphql(query, variables);
const pulls = result.repository.pullRequests.nodes;
let displayList = [];
for (let i = 0; i < pulls.length; i++) {
let pull = pulls[i];
displayList.push({ PR: pull.number, Title: pull.title });
}
console.info("The following pull requests will be merged:");
console.table(displayList);
await fetchPullRequests(pulls, "https://github.com/citra-emu/citra", execa);
const mergeResults = await mergePullRequests(pulls, execa);
await generateReadme(pulls, context, mergeResults, execa);
await tagAndPush(github, context.repo.owner, `${context.repo.repo}-canary`, execa, true);
}
module.exports.mergebot = mergebot;
module.exports.checkCanaryChanges = checkCanaryChanges;
module.exports.tagAndPush = tagAndPush;
module.exports.checkBaseChanges = checkBaseChanges;
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