build system

Author: zawata

build.js

@@ -0,0 +1,28 @@
+const { stat } = require('fs/promises');
+const path = require('path');
+const {promises: fs, constants } = require('fs');
+const { promisify } = require('util');
+const execFile = promisify(require('child_process').execFile);
+
+const { spawn, paths, exists } = require('./util');
+
+(async () => {
+  if (await exists(paths.exeFinal)) {
+    return;
+  }
+
+  if (!(await exists(paths.bin))) {
+    await fs.mkdir(paths.bin, { recursive: true });
+  }
+
+  await spawn('cargo', [
+    'build',
+    `--manifest-path=${path.join(paths.submodule, 'Cargo.toml')}`,
+    `--target-dir=${paths.build}`,
+    '--release'
+  ]);
+  await fs.copyFile(
+    paths.exeOut,
+    paths.exeFinal
+  );
+})();

package.json

@@ -2,4 +2,8 @@
   "name": "node-dump-syms",
   "version": "0.0.1",
   "main": "index.js",
-  "license": "MIT"}
+  "license": "MIT",
+  "scripts": {
+    "install": "node ./build.js"
+  }
+}

util.js

@@ -0,0 +1,39 @@
+const path = require('path');
+const { promises: fs } = require('fs');
+const { spawn: spawnSync } = require('child_process');
+
+const spawn = (...args) => new Promise((resolve, reject) => {
+  let stdout = Buffer.alloc(0);
+  let stderr = Buffer.alloc(0);
+  const child = spawnSync(...args);
+  const concat = (o) => (b) => o = Buffer.concat([o, b]);
+  child.stdout.on('data', concat(stdout));
+  child.stderr.on('data', concat(stderr));
+  child.on('close', function (code) {
+    if (code !== 0) {
+      reject(stderr ? new Error(stderr.toString()) : new Error(`Command ${command} failed ${code}`));
+    } else {
+      resolve(stdout);
+    }
+  });
+  child.on('error', function (error) {
+    reject(error);
+  })
+});
+
+module.exports.spawn = spawn;
+
+const exists = async (filePath) => fs.access(filePath).then(() => true).catch(e => e.code !== 'ENOENT');
+
+module.exports.exists = exists;
+
+const exe = process.platform === 'win32' ? '.exe' : '';
+const paths = {
+  submodule: path.join(__dirname, 'deps', 'dump_syms'),
+  bin: path.join(__dirname, 'bin', `${process.platform}-${process.arch}`),
+  build: path.join(__dirname, 'build'),
+  exeOut: path.join(__dirname, 'build', 'release', `dump_syms${exe}`),
+  exeFinal: path.join(__dirname, 'bin', `${process.platform}-${process.arch}`, `dump_syms${exe}`),
+};
+
+module.exports.paths = paths;