Add postinstall hook for fetching official protoc-gen-js binary

Author: dibenede

MODULE.bazel.lock

@@ -0,0 +1,109 @@
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+const AdmZip = require('adm-zip');
+
+const VERSION = '4.0.0';
+const BIN_DIR = path.join(__dirname, 'bin');
+
+function getPlatform() {
+  const platform = os.platform();
+  if (platform === 'darwin') {
+    return 'osx';
+  }
+  if (platform === 'win32') {
+    return 'windows';
+  }
+  return platform;
+}
+
+function getArch() {
+  const arch = os.arch();
+  if (arch === 'x64') {
+    return 'x86_64';
+  }
+  if (arch === 'arm64') {
+    return 'aarch64';
+  }
+  return arch;
+}
+
+function getDownloadUrl() {
+  const platform = getPlatform();
+  const arch = getArch();
+  const supportedPlatforms = {
+    'linux': ['x86_64', 'aarch64'],
+    'osx': ['x86_64', 'aarch64'],
+    'windows': ['x86_64']
+  };
+
+  if (!supportedPlatforms[platform] || !supportedPlatforms[platform].includes(arch)) {
+    console.error(`Unsupported platform: ${platform}-${arch}`);
+    process.exit(1);
+  }
+
+  return `https://github.com/protocolbuffers/protobuf-javascript/releases/download/v${VERSION}/protobuf-javascript-${VERSION}-${platform}-${arch}.zip`;
+}
+
+function unzip(zipFile, destDir, binaryName) {
+  return new Promise((resolve, reject) => {
+    const binaryPathInZip = `bin/${binaryName}`;
+    const zip = new AdmZip(zipFile);
+    const zipEntries = zip.getEntries();
+    let found = false;
+
+    for (const entry of zipEntries) {
+      const entryFileName = entry.entryName.replace(/\\/g, '/');
+      if (entryFileName.endsWith(binaryPathInZip)) {
+        found = true;
+        fs.writeFile(path.join(destDir, binaryName), entry.getData(), (err) => {
+          if (err) {
+            reject(err);
+          } else {
+            resolve();
+          }
+        });
+        break;
+      }
+    }
+
+    if (!found) {
+      reject(new Error(`Binary ${binaryPathInZip} not found in zip file.`));
+    }
+  });
+}
+
+async function main() {
+  try {
+    const downloadUrl = getDownloadUrl();
+    const zipFile = path.join(__dirname, 'google-protobuf.zip');
+    const binaryName = os.platform() === 'win32' ? 'protoc-gen-js.exe' : 'protoc-gen-js';
+
+    await fs.promises.mkdir(BIN_DIR, { recursive: true });
+
+    console.log(`Downloading ${downloadUrl}`);
+    const response = await fetch(downloadUrl);
+    if (!response.ok) {
+        throw new Error(`Failed to download: ${response.status} ${response.statusText}`);
+    }
+    const buffer = await response.arrayBuffer();
+    await fs.promises.writeFile(zipFile, Buffer.from(buffer));
+
+    console.log('Unzipping...');
+    await unzip(zipFile, BIN_DIR, binaryName);
+
+    await fs.promises.unlink(zipFile);
+
+    const binaryPath = path.join(BIN_DIR, binaryName);
+    
+    console.log(`Making ${binaryPath} executable...`);
+    await fs.promises.chmod(binaryPath, 0o755);
+
+    console.log('Done!');
+  } catch (err) {
+    console.error(`Failed to download protoc-gen-js: ${err.message}`);
+    process.exit(1);
+  }
+}
+
+main();

download-protoc-gen-js.js

@@ -244,7 +244,7 @@ function test_commonjs(cb) {
 }
 
 function remove_gen_files(cb) {
-  exec('rm -rf commonjs_out google-protobuf.js deps.js google-protobuf-*.tgz conformance/protos/*.js',
+  exec('rm -rf bin/ commonjs_out google-protobuf.js deps.js google-protobuf-*.tgz conformance/protos/*.js',
        make_exec_logging_callback(cb));
 }
 

gulpfile.js

@@ -23,12 +23,16 @@
   "scripts": {
     "build": "node ./node_modules/gulp/bin/gulp.js dist",
     "test": "node ./node_modules/gulp/bin/gulp.js test",
-    "clean": "node ./node_modules/gulp/bin/gulp.js clean"
+    "clean": "node ./node_modules/gulp/bin/gulp.js clean",
+    "postinstall": "node download-protoc-gen-js.js"
   },
   "repository": {
     "type": "git",
     "url": "https://github.com/protocolbuffers/protobuf-javascript"
   },
   "author": "Google Protocol Buffers Team",
-  "license": "(BSD-3-Clause AND Apache-2.0)"
+  "license": "(BSD-3-Clause AND Apache-2.0)",
+  "dependencies": {
+    "adm-zip": "^0.5.16"
+  }
 }

package-lock.json

@@ -0,0 +1,13 @@
+
+const { spawn } = require('child_process');
+
+const child = spawn('node', ['download-protoc-gen-js.js'], {
+  stdio: 'inherit'
+});
+
+child.on('close', (code) => {
+  if (code !== 0) {
+    console.error('Failed to download protoc-gen-js');
+    process.exit(1);
+  }
+});

package.json

@@ -14,6 +14,11 @@
   dependencies:
     is-negated-glob "^1.0.0"
 
+adm-zip@^0.5.16:
+  version "0.5.16"
+  resolved "https://registry.npmjs.org/adm-zip/-/adm-zip-0.5.16.tgz"
+  integrity sha512-TGw5yVi4saajsSEgz25grObGHEUaDrniwvA2qwSC060KfqGPdglhvPMA2lPIoxs3PQIItj2iag35fONcQqgUaQ==
+
 ansi-regex@^5.0.1:
   version "5.0.1"
   resolved "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz"