feat(installer): Implement cross-platform patcher. (#39)

* megu cute

scripts/patcher/uninstall.js

@@ -0,0 +1,59 @@
+const path = require("path");
+const fs = require("fs");
+
+console.log("\nVencord Uninstaller\n");
+
+if (!fs.existsSync(path.join(process.cwd(), "node_modules"))) {
+    console.log("You need to install dependencies first. Run:", "pnpm install");
+    process.exit(1);
+}
+
+const {
+    getMenuItem,
+    getWindowsDirs,
+    getDarwinDirs,
+    getLinuxDirs,
+} = require("./common");
+
+switch (process.platform) {
+    case "win32":
+        uninstall(getWindowsDirs());
+        break;
+    case "darwin":
+        uninstall(getDarwinDirs());
+        break;
+    case "linux":
+        uninstall(getLinuxDirs());
+        break;
+    default:
+        console.log("Unknown OS");
+        break;
+}
+
+async function uninstall(installations) {
+    const selected = await getMenuItem(installations);
+
+    for (const version of selected.versions) {
+        const dir = version.path;
+        // Check if we have write perms to the install directory...
+        try {
+            fs.accessSync(selected.location, fs.constants.W_OK);
+        } catch (e) {
+            console.error("No write access to", selected.location);
+            console.error(
+                "Try running this script as an administrator:",
+                "sudo pnpm unpatch"
+            );
+            process.exit(1);
+        }
+        if (fs.existsSync(dir)) {
+            fs.rmSync(dir, { recursive: true });
+        }
+        console.log(
+            "Successfully unpatched",
+            version.name
+                ? `${selected.branch} ${version.name}`
+                : selected.branch
+        );
+    }
+}