carefully parse /etc/os-release

src/server/validateDependencies.ts

@@ -44,9 +44,9 @@ export async function validateDependencies(browserPath: string, browser: Browser
     return;
   // Check Ubuntu version.
   const missingPackages = new Set();
-  const osRelease = await readFileAsync('/etc/os-release', 'utf8').catch(e => '');
-  const [ubuntuName = '', ubuntuVersion = ''] = osRelease.trim().split('\n');
-  if (ubuntuName.toLowerCase().includes('ubuntu') && ubuntuVersion.includes('18.04')) {
+
+  const ubuntuVersion = await getUbuntuVersion();
+  if (ubuntuVersion === '18.04') {
     // Translate missing dependencies to package names to install with apt.
     for (const missingDep of missingDeps) {
       const packageName = LIBRARY_TO_PACKAGE_NAME_UBUNTU_18_04[missingDep];
@@ -61,7 +61,7 @@ export async function validateDependencies(browserPath: string, browser: Browser
   if (missingPackages.size) {
     missingPackagesMessage = [
       `  Install missing packages with:`,
-      `      apt-get install -y ${[...missingPackages].join('\\\n          ')}`,
+      `      apt-get install ${[...missingPackages].join('\\\n          ')}`,
       ``,
       ``,
     ].join('\n');
@@ -122,6 +122,26 @@ function lddAsync(filePath: string): Promise<{stdout: string, stderr: string, co
   });
 }
 
+async function getUbuntuVersion(): Promise<string> {
+  const osRelease = await readFileAsync('/etc/os-release', 'utf8').catch(e => '');
+  if (!osRelease)
+    return '';
+  const fields = new Map();
+  for (const line of osRelease.split('\n')) {
+    const tokens = line.split('=');
+    const name = tokens.shift();
+    let value = tokens.join('=').trim();
+    if (value.startsWith('"') && value.endsWith('"'))
+      value = value.substring(1, value.length - 1);
+    if (!name)
+      continue;
+    fields.set(name.toLowerCase(), value);
+  }
+  if (!fields.get('name') || fields.get('name').toLowerCase() !== 'ubuntu')
+    return '';
+  return fields.get('version_id') || '';
+}
+
 // This list is generated with https://gist.github.com/aslushnikov/2766200430228c3700537292fccad064
 const LIBRARY_TO_PACKAGE_NAME_UBUNTU_18_04: { [s: string]: string} = {
   'libEGL.so.1': 'libegl1',