init commit

tools/build.js

@@ -0,0 +1,83 @@
+#!/usr/bin/env node
+/**
+ * Assembles build/app and build/service from the sources in this repository.
+ *
+ * There is no bundler and there are no runtime dependencies: the frontend talks
+ * to the Luna bus through PalmServiceBridge and the service uses the
+ * webos-service module provided by the TV itself. The only thing this script
+ * does is copy files and substitute the __APP_ID__ / __SERVICE_ID__ /
+ * __VERSION__ / __TITLE__ placeholders, so that the application id lives in
+ * exactly one place (the "name" field of package.json).
+ */
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+
+const root = path.resolve(__dirname, '..');
+const pkg = JSON.parse(fs.readFileSync(path.join(root, 'package.json'), 'utf8'));
+
+const vars = {
+  __APP_ID__: pkg.name,
+  __SERVICE_ID__: `${pkg.name}.service`,
+  __VERSION__: pkg.version,
+  __TITLE__: pkg.title,
+};
+
+const TEXT_EXTENSIONS = ['.js', '.json', '.html', '.css', '.txt', '.sh'];
+
+function substitute(contents) {
+  return Object.keys(vars).reduce(
+    (acc, key) => acc.split(key).join(vars[key]),
+    contents,
+  );
+}
+
+function copy(src, dst) {
+  fs.mkdirSync(path.dirname(dst), { recursive: true });
+  if (TEXT_EXTENSIONS.includes(path.extname(src))) {
+    fs.writeFileSync(dst, substitute(fs.readFileSync(src, 'utf8')));
+  } else {
+    fs.copyFileSync(src, dst);
+  }
+}
+
+function copyTree(src, dst) {
+  for (const entry of fs.readdirSync(src, { withFileTypes: true })) {
+    const from = path.join(src, entry.name);
+    const to = path.join(dst, entry.name);
+    if (entry.isDirectory()) {
+      copyTree(from, to);
+    } else {
+      copy(from, to);
+    }
+  }
+}
+
+const build = path.join(root, 'build');
+fs.rmSync(build, { recursive: true, force: true });
+
+// Application (frontend)
+const appDir = path.join(build, 'app');
+copyTree(path.join(root, 'app'), appDir);
+copy(path.join(root, 'appinfo.json'), path.join(appDir, 'appinfo.json'));
+copy(path.join(root, 'assets', 'icon.png'), path.join(appDir, 'icon.png'));
+copy(path.join(root, 'assets', 'largeIcon.png'), path.join(appDir, 'largeIcon.png'));
+
+// JS service
+const serviceDir = path.join(build, 'service');
+copyTree(path.join(root, 'service'), serviceDir);
+fs.writeFileSync(
+  path.join(serviceDir, 'services.json'),
+  `${JSON.stringify(
+    {
+      id: vars.__SERVICE_ID__,
+      description: `${pkg.title} service`,
+      services: [{ name: vars.__SERVICE_ID__ }],
+    },
+    null,
+    2,
+  )}\n`,
+);
+
+console.log(`Built ${vars.__APP_ID__} ${vars.__VERSION__} into ${build}`);