Bundle Python and adb so the app needs nothing installed

- app/build/fetch-deps.js downloads a standalone Python 3.12
  (python-build-standalone) for every build and adb from Google's
  platform-tools, pinned by SHA-256, and prunes what the server never
  uses. It replaces the Windows-only embeddable Python.
- The app runs the bundled Python with -I -u -B -X utf8, so a PYTHONHOME
  or PYTHONPATH meant for another Python can't break it and nothing is
  written inside the signed macOS bundle.
- An adb you already have still goes first, so two adb versions don't
  keep restarting each other's server. arm64 Linux has no official
  platform-tools and keeps using the system adb.
- ui/frame_apk.py reads APK badging (package, label, version, min SDK,
  ABIs, icon) from the binary manifest and resources.arsc, replacing
  aapt2. It matches aapt2 on nine F-Droid APKs and finds launcher icons
  the old path missed with adaptive icons.
- The app reads the computer's clipboard through Electron, so Linux no
  longer needs wl-clipboard or xclip.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

app/build/fetch-deps.js

@@ -0,0 +1,118 @@
+// Downloads what the app bundles so users install nothing else: a standalone
+// Python (python-build-standalone) and adb (Android platform-tools). Each goes in
+// build/deps/<os>-<arch>/{python,tools}, which package.json copies into the app's
+// resources. Everything is pinned by version and SHA-256.
+//   node build/fetch-deps.js mac arm64 | win x64 | linux x64 arm64
+const crypto = require("crypto");
+const fs = require("fs");
+const https = require("https");
+const path = require("path");
+const { execFileSync } = require("child_process");
+
+const PY = "3.12.14+20260924";
+const PY_URL = (triple) => "https://github.com/astral-sh/python-build-standalone/releases/download/"
+  + `${PY.split("+")[1]}/cpython-${PY}-${triple}-install_only_stripped.tar.gz`;
+const PYTHON = {
+  "mac-arm64": ["aarch64-apple-darwin", "c2edb321cd32ec2b170df208db0446dccc4398db602ca27cf2079098fb1f7d9d"],
+  "win-x64": ["x86_64-pc-windows-msvc", "c5bf8edfe858c1df9891be498b5bbc8761d383df5b9790658b088fea4870433a"],
+  "linux-x64": ["x86_64-unknown-linux-gnu", "269b2c99e4db15b242bf01832f4fea1e8f1a664f273cff519393f296e9820b41"],
+  "linux-arm64": ["aarch64-unknown-linux-gnu", "c8499b61252c433280f134df954464d19811527b31cb920c35fc6967c1222e35"],
+};
+
+// Google publishes no arm64 Linux platform-tools; there the app uses the system adb.
+const PT = "37.0.1";
+const PT_URL = (os) => `https://dl.google.com/android/repository/platform-tools_r${PT}-${os}.zip`;
+const TOOLS = {
+  mac: ["darwin", "ee39ad5967e95c2a07f04dbcbde96b1a0c916ba376096db5d2f498b7727a5d1d", ["adb"]],
+  win: ["win", "45f4d63113e895ebde0c90f194099a4676b6ac653bd28d54314a9e022bbc1a99",
+        ["adb.exe", "AdbWinApi.dll", "AdbWinUsbApi.dll", "libwinpthread-1.dll"]],
+  linux: ["linux", "d230f13842f60f782a8645f9c813f8f845bf36089ea7289f28c48f17979313f1", ["adb"]],
+};
+
+// Parts of Python the server never imports (GUI, tests, packaging, headers).
+const PRUNE = [
+  "include", "share", "Scripts", "libs", "tcl", "lib/pkgconfig", "lib/itcl4", "lib/tcl8", "lib/tcl8.6",
+  "lib/tk8.6", "lib/thread2.8", "bin/idle3", "bin/idle3.12", "bin/pip", "bin/pip3", "bin/pip3.12",
+  "bin/pydoc3", "bin/pydoc3.12", "bin/2to3", "bin/2to3-3.12", "bin/python3-config", "bin/python3.12-config",
+  ...["test", "idlelib", "tkinter", "turtledemo", "ensurepip", "lib2to3", "site-packages/pip"]
+    .flatMap((d) => [`lib/python3.12/${d}`, `Lib/${d}`]),
+];
+
+function get(url) {
+  return new Promise((resolve, reject) => {
+    https.get(url, (res) => {
+      if (res.statusCode >= 300 && res.statusCode < 400 && res.headers.location) {
+        res.resume();
+        return resolve(get(res.headers.location));
+      }
+      if (res.statusCode !== 200) return reject(new Error(`${url}: HTTP ${res.statusCode}`));
+      const chunks = [];
+      res.on("data", (c) => chunks.push(c));
+      res.on("end", () => resolve(Buffer.concat(chunks)));
+    }).on("error", reject);
+  });
+}
+
+async function download(url, sha256, file) {
+  const data = await get(url);
+  const sum = crypto.createHash("sha256").update(data).digest("hex");
+  if (sum !== sha256) throw new Error(`checksum mismatch for ${url}: ${sum}`);
+  fs.writeFileSync(file, data);
+}
+
+// Windows' own bsdtar: Git's GNU tar, often first on PATH, reads C:\ as a remote host.
+const TAR = process.platform === "win32" ? path.join(process.env.SystemRoot, "System32", "tar.exe") : "tar";
+
+function extract(file, dir) {
+  fs.mkdirSync(dir, { recursive: true });
+  // bsdtar (macOS, Windows 10+) reads zip files; GNU tar doesn't, so fall back to unzip.
+  try { execFileSync(TAR, ["-xf", file, "-C", dir]); }
+  catch (e) {
+    if (!file.endsWith(".zip")) throw e;
+    execFileSync("unzip", ["-q", "-o", file, "-d", dir]);
+  }
+  fs.rmSync(file);
+}
+
+async function fetch(os, arch) {
+  const key = `${os}-${arch}`;
+  if (!PYTHON[key]) throw new Error(`no bundle for ${key}`);
+  const out = path.join(__dirname, "deps", key);
+  const stamp = path.join(out, ".version");
+  const version = `python ${PY}, platform-tools ${PT}`;
+  if (fs.existsSync(stamp) && fs.readFileSync(stamp, "utf8") === version) {
+    console.log(`${key}: already fetched (${version})`);
+    return;
+  }
+  fs.rmSync(out, { recursive: true, force: true });
+  fs.mkdirSync(out, { recursive: true });
+
+  const [triple, pySha] = PYTHON[key];
+  const tgz = path.join(out, "python.tar.gz");
+  await download(PY_URL(triple), pySha, tgz);
+  extract(tgz, out);  // unpacks to python/
+  for (const p of PRUNE) fs.rmSync(path.join(out, "python", p), { recursive: true, force: true });
+
+  const tools = path.join(out, "tools");
+  fs.mkdirSync(tools);
+  if (!(os === "linux" && arch === "arm64")) {
+    const [name, ptSha, keep] = TOOLS[os];
+    const zip = path.join(out, "pt.zip");
+    const tmp = path.join(out, "pt");
+    await download(PT_URL(name), ptSha, zip);
+    extract(zip, tmp);
+    for (const f of [...keep, "NOTICE.txt", "source.properties"]) {
+      fs.copyFileSync(path.join(tmp, "platform-tools", f), path.join(tools, f));
+    }
+    if (os !== "win") fs.chmodSync(path.join(tools, "adb"), 0o755);
+    fs.rmSync(tmp, { recursive: true, force: true });
+  }
+  fs.writeFileSync(stamp, version);
+  console.log(`${key}: ${version} -> ${out}`);
+}
+
+(async () => {
+  const [os, ...archs] = process.argv.slice(2);
+  if (!os || !archs.length) throw new Error("usage: node build/fetch-deps.js <mac|win|linux> <arch>...");
+  for (const arch of archs) await fetch(os, arch);
+})().catch((e) => { console.error(e.message); process.exit(1); });