Vencord Standalone without git/node (#148)

4 files changed, 238 insertions, 0 deletions

diff --git a/src/ipcMain/updater/common.ts b/src/ipcMain/updater/common.ts
new file mode 100644
index 0000000..41f08e8
--- /dev/null
+++ b/src/ipcMain/updater/common.ts
@@ -0,0 +1,59 @@
+/*
+ * Vencord, a modification for Discord's desktop app
+ * Copyright (c) 2022 Vendicated and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { createHash } from "crypto";
+import { createReadStream } from "fs";
+import { join } from "path";
+
+export async function calculateHashes() {
+    const hashes = {} as Record<string, string>;
+
+    await Promise.all(
+        ["patcher.js", "preload.js", "renderer.js"].map(file => new Promise<void>(r => {
+            const fis = createReadStream(join(__dirname, file));
+            const hash = createHash("sha1", { encoding: "hex" });
+            fis.once("end", () => {
+                hash.end();
+                hashes[file] = hash.read();
+                r();
+            });
+            fis.pipe(hash);
+        }))
+    );
+
+    return hashes;
+}
+
+export function serializeErrors(func: (...args: any[]) => any) {
+    return async function () {
+        try {
+            return {
+                ok: true,
+                value: await func(...arguments)
+            };
+        } catch (e: any) {
+            return {
+                ok: false,
+                error: e instanceof Error ? {
+                    // prototypes get lost, so turn error into plain object
+                    ...e
+                } : e
+            };
+        }
+    };
+}
diff --git a/src/ipcMain/updater/git.ts b/src/ipcMain/updater/git.ts
new file mode 100644
index 0000000..7e4176a
--- /dev/null
+++ b/src/ipcMain/updater/git.ts
@@ -0,0 +1,74 @@
+/*
+ * Vencord, a modification for Discord's desktop app
+ * Copyright (c) 2022 Vendicated and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { execFile as cpExecFile } from "child_process";
+import { ipcMain } from "electron";
+import { join } from "path";
+import { promisify } from "util";
+
+import IpcEvents from "../../utils/IpcEvents";
+import { calculateHashes, serializeErrors } from "./common";
+
+const VENCORD_SRC_DIR = join(__dirname, "..");
+
+const execFile = promisify(cpExecFile);
+
+function git(...args: string[]) {
+    return execFile("git", args, {
+        cwd: VENCORD_SRC_DIR
+    });
+}
+
+async function getRepo() {
+    const res = await git("remote", "get-url", "origin");
+    return res.stdout.trim()
+        .replace(/git@(.+):/, "https://$1/")
+        .replace(/\.git$/, "");
+}
+
+async function calculateGitChanges() {
+    await git("fetch");
+
+    const res = await git("log", "HEAD...origin/main", "--pretty=format:%an/%h/%s");
+
+    const commits = res.stdout.trim();
+    return commits ? commits.split("\n").map(line => {
+        const [author, hash, ...rest] = line.split("/");
+        return {
+            hash, author, message: rest.join("/")
+        };
+    }) : [];
+}
+
+async function pull() {
+    const res = await git("pull");
+    return res.stdout.includes("Fast-forward");
+}
+
+async function build() {
+    const res = await execFile("node", ["scripts/build/build.mjs"], {
+        cwd: VENCORD_SRC_DIR
+    });
+    return !res.stderr.includes("Build failed");
+}
+
+ipcMain.handle(IpcEvents.GET_HASHES, serializeErrors(calculateHashes));
+ipcMain.handle(IpcEvents.GET_REPO, serializeErrors(getRepo));
+ipcMain.handle(IpcEvents.GET_UPDATES, serializeErrors(calculateGitChanges));
+ipcMain.handle(IpcEvents.UPDATE, serializeErrors(pull));
+ipcMain.handle(IpcEvents.BUILD, serializeErrors(build));
diff --git a/src/ipcMain/updater/http.ts b/src/ipcMain/updater/http.ts
new file mode 100644
index 0000000..5b3f0ff
--- /dev/null
+++ b/src/ipcMain/updater/http.ts
@@ -0,0 +1,86 @@
+/*
+ * Vencord, a modification for Discord's desktop app
+ * Copyright (c) 2022 Vendicated and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { ipcMain } from "electron";
+import { writeFile } from "fs/promises";
+import { join } from "path";
+
+import gitHash from "~git-hash";
+import gitRemote from "~git-remote";
+
+import { VENCORD_USER_AGENT } from "../../utils/constants";
+import IpcEvents from "../../utils/IpcEvents";
+import { get } from "../simpleGet";
+import { calculateHashes, serializeErrors } from "./common";
+
+const API_BASE = `https://api.github.com/repos/${gitRemote}`;
+let PendingUpdates = [] as [string, Buffer][];
+
+async function githubGet(endpoint: string) {
+    return get(API_BASE + endpoint, {
+        headers: {
+            Accept: "application/vnd.github+json",
+            // "All API requests MUST include a valid User-Agent header.
+            // Requests with no User-Agent header will be rejected."
+            "User-Agent": VENCORD_USER_AGENT,
+            // todo: perhaps add support for (optional) api token?
+            // unauthorised rate limit is 60 reqs/h
+            // https://github.com/settings/tokens/new?description=Vencord%20Updater
+        }
+    });
+}
+
+async function calculateGitChanges() {
+    const res = await githubGet(`/compare/${gitHash}...HEAD`);
+
+    const data = JSON.parse(res.toString("utf-8"));
+    return data.commits.map(c => ({
+        // github api only sends the long sha
+        hash: c.sha.slice(0, 7),
+        author: c.author.login,
+        message: c.commit.message
+    }));
+}
+
+async function fetchUpdates() {
+    const release = await githubGet("/releases/latest");
+
+    const data = JSON.parse(release.toString());
+    const hash = data.name.slice(data.name.lastIndexOf(" ") + 1);
+    if (hash === gitHash)
+        return true;
+
+    await Promise.all(data.assets.map(async ({ name, browser_download_url }) => {
+        if (["patcher.js", "preload.js", "renderer.js"].some(s => name.startsWith(s))) {
+            PendingUpdates.push([name, await get(browser_download_url)]);
+        }
+    }));
+    return true;
+}
+
+async function applyUpdates() {
+    await Promise.all(PendingUpdates.map(([name, data]) => writeFile(join(__dirname, name), data)));
+    PendingUpdates = [];
+    return true;
+}
+
+ipcMain.handle(IpcEvents.GET_HASHES, serializeErrors(calculateHashes));
+ipcMain.handle(IpcEvents.GET_REPO, serializeErrors(() => `https://github.com/${gitRemote}`));
+ipcMain.handle(IpcEvents.GET_UPDATES, serializeErrors(calculateGitChanges));
+ipcMain.handle(IpcEvents.UPDATE, serializeErrors(fetchUpdates));
+ipcMain.handle(IpcEvents.BUILD, serializeErrors(applyUpdates));
diff --git a/src/ipcMain/updater/index.ts b/src/ipcMain/updater/index.ts
new file mode 100644
index 0000000..7036112
--- /dev/null
+++ b/src/ipcMain/updater/index.ts
@@ -0,0 +1,19 @@
+/*
+ * Vencord, a modification for Discord's desktop app
+ * Copyright (c) 2022 Vendicated and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import(IS_STANDALONE ? "./http" : "./git");