1 files changed, 218 insertions, 0 deletions

diff --git a/.github/workflows/android-merge.js b/.github/workflows/android-merge.js
new file mode 100644
index 000000000..7e02dc9e5
--- /dev/null
+++ b/.github/workflows/android-merge.js
@@ -0,0 +1,218 @@
+// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+// Note: This is a GitHub Actions script
+// It is not meant to be executed directly on your machine without modifications
+
+const fs = require("fs");
+// which label to check for changes
+const CHANGE_LABEL = 'android-merge';
+// 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 pushedDate oid }
+                }
+            }
+        }
+    }`;
+    const variables = {
+        owner: context.repo.owner,
+        name: context.repo.repo,
+        ref: 'refs/heads/master',
+    };
+    const result = await github.graphql(query, variables);
+    const pushedAt = result.repository.ref.target.pushedDate;
+    console.log(`Last commit pushed at ${pushedAt}.`);
+    const delta = new Date() - new Date(pushedAt);
+    if (delta <= DETECTION_TIME_FRAME) {
+        console.info('New changes detected, triggering a new build.');
+        return true;
+    }
+    console.info('No new changes detected.');
+    return false;
+}
+
+async function checkAndroidChanges(github, context) {
+    if (checkBaseChanges(github, context)) return true;
+    const query = `query($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: CHANGE_LABEL,
+    };
+    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:$owner) {
+            refs(refPrefix: "refs/tags/", orderBy: {field: TAG_COMMIT_DATE, direction: DESC}, first: 10) {
+                nodes { name }
+            }
+        }
+    }`;
+    const variables = {
+        owner: owner,
+        name: repo,
+    };
+    const tags = await github.graphql(query, variables);
+    const tagList = tags.repository.refs.nodes;
+    const lastTag = tagList[0] ? tagList[0].name : 'dummy-0';
+    const tagNumber = /\w+-(\d+)/.exec(lastTag)[1] | 0;
+    const channel = repo.split('-')[1];
+    const newTag = `${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}/${repo}.git`]);
+    await execa("git", ['push', 'target', 'master', '-f']);
+    await execa("git", ['push', 'target', 'master', '--tags']);
+    console.info('Successfully pushed new changes.');
+}
+
+async function generateReadme(pulls, context, mergeResults, execa) {
+    let baseUrl = `https://github.com/${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", "yuzubot"]);
+    await execa("git", [
+        "config",
+        "--global",
+        "user.email",
+        "yuzu\x40yuzu-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: CHANGE_LABEL,
+    };
+    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/yuzu-emu/yuzu", execa);
+    const mergeResults = await mergePullRequests(pulls, execa);
+    await generateReadme(pulls, context, mergeResults, execa);
+    await tagAndPush(github, context.repo.owner, `${context.repo.repo}-android`, execa, true);
+}
+
+module.exports.mergebot = mergebot;
+module.exports.checkAndroidChanges = checkAndroidChanges;
+module.exports.tagAndPush = tagAndPush;
+module.exports.checkBaseChanges = checkBaseChanges;