feat(launchDoctor): package mappings for Ubuntu 20.04

This teaches Launch Doctor to print a command to install missing
packages on Ubuntu 20.04.

References microsoft#2745

src/server/validateDependencies.ts

@@ -46,10 +46,15 @@ export async function validateDependencies(browserPath: string, browser: Browser
   const missingPackages = new Set();
 
   const ubuntuVersion = await getUbuntuVersion();
-  if (ubuntuVersion === '18.04') {
+  let libraryToPackageNameMapping = null;
+  if (ubuntuVersion === '18.04')
+    libraryToPackageNameMapping = LIBRARY_TO_PACKAGE_NAME_UBUNTU_18_04;
+  else if (ubuntuVersion === '20.04')
+    libraryToPackageNameMapping = LIBRARY_TO_PACKAGE_NAME_UBUNTU_20_04;
+  if (libraryToPackageNameMapping) {
     // 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];
+      const packageName = libraryToPackageNameMapping[missingDep];
       if (packageName) {
         missingPackages.add(packageName);
         missingDeps.delete(missingDep);
@@ -207,3 +212,86 @@ const LIBRARY_TO_PACKAGE_NAME_UBUNTU_18_04: { [s: string]: string} = {
   'libxslt.so.1': 'libxslt1.1',
 };
 
+const LIBRARY_TO_PACKAGE_NAME_UBUNTU_20_04: { [s: string]: string} = {
+  "libglib-2.0.so.0": "libglib2.0-0",
+  "libX11.so.6": "libx11-6",
+  "libxcb.so.1": "libxcb1",
+  "libGL.so.1": "libgl1",
+  "libEGL.so.1": "libegl1",
+  "libnotify.so.4": "libnotify4",
+  "libgdk_pixbuf-2.0.so.0": "libgdk-pixbuf2.0-0",
+  "libgio-2.0.so.0": "libglib2.0-0",
+  "libgobject-2.0.so.0": "libglib2.0-0",
+  "libvpx.so.6": "libvpx6",
+  "libopus.so.0": "libopus0",
+  "libxml2.so.2": "libxml2",
+  "libicui18n.so.66": "libicu66",
+  "libicuuc.so.66": "libicu66",
+  "libxslt.so.1": "libxslt1.1",
+  "libwoff2dec.so.1.0.2": "libwoff1",
+  "libcairo.so.2": "libcairo2",
+  "libfontconfig.so.1": "libfontconfig1",
+  "libfreetype.so.6": "libfreetype6",
+  "libharfbuzz.so.0": "libharfbuzz0b",
+  "libharfbuzz-icu.so.0": "libharfbuzz-icu0",
+  "libgstapp-1.0.so.0": "libgstreamer-plugins-base1.0-0",
+  "libgstbase-1.0.so.0": "libgstreamer1.0-0",
+  "libgstreamer-1.0.so.0": "libgstreamer1.0-0",
+  "libgstpbutils-1.0.so.0": "libgstreamer-plugins-base1.0-0",
+  "libgstaudio-1.0.so.0": "libgstreamer-plugins-base1.0-0",
+  "libgsttag-1.0.so.0": "libgstreamer-plugins-base1.0-0",
+  "libgstvideo-1.0.so.0": "libgstreamer-plugins-base1.0-0",
+  "libgstgl-1.0.so.0": "libgstreamer-gl1.0-0",
+  "libgstcodecparsers-1.0.so.0": "libgstreamer-plugins-bad1.0-0",
+  "libgstfft-1.0.so.0": "libgstreamer-plugins-base1.0-0",
+  "libjpeg.so.8": "libjpeg-turbo8",
+  "libpng16.so.16": "libpng16-16",
+  "libopenjp2.so.7": "libopenjp2-7",
+  "libwebpdemux.so.2": "libwebpdemux2",
+  "libwebp.so.6": "libwebp6",
+  "libsoup-2.4.so.1": "libsoup2.4-1",
+  "libenchant.so.1": "libenchant1c2a",
+  "libgmodule-2.0.so.0": "libglib2.0-0",
+  "libsecret-1.so.0": "libsecret-1-0",
+  "libhyphen.so.0": "libhyphen0",
+  "libXcomposite.so.1": "libxcomposite1",
+  "libXdamage.so.1": "libxdamage1",
+  "libwayland-server.so.0": "libwayland-server0",
+  "libwayland-egl.so.1": "libwayland-egl1",
+  "libwayland-client.so.0": "libwayland-client0",
+  "libgtk-3.so.0": "libgtk-3-0",
+  "libgdk-3.so.0": "libgtk-3-0",
+  "libpango-1.0.so.0": "libpango-1.0-0",
+  "libatk-1.0.so.0": "libatk1.0-0",
+  "libxkbcommon.so.0": "libxkbcommon0",
+  "libepoxy.so.0": "libepoxy0",
+  "libatk-bridge-2.0.so.0": "libatk-bridge2.0-0",
+  "libX11-xcb.so.1": "libx11-xcb1",
+  "libXcursor.so.1": "libxcursor1",
+  "libXext.so.6": "libxext6",
+  "libXfixes.so.3": "libxfixes3",
+  "libXi.so.6": "libxi6",
+  "libXrender.so.1": "libxrender1",
+  "libdbus-glib-1.so.2": "libdbus-glib-1-2",
+  "libdbus-1.so.3": "libdbus-1-3",
+  "libpangocairo-1.0.so.0": "libpangocairo-1.0-0",
+  "libcairo-gobject.so.2": "libcairo-gobject2",
+  "libxcb-shm.so.0": "libxcb-shm0",
+  "libpangoft2-1.0.so.0": "libpangoft2-1.0-0",
+  "libXt.so.6": "libxt6",
+  "libgthread-2.0.so.0": "libglib2.0-0",
+  "libgtk-x11-2.0.so.0": "libgtk2.0-0",
+  "libgdk-x11-2.0.so.0": "libgtk2.0-0",
+  "libnss3.so": "libnss3",
+  "libnssutil3.so": "libnss3",
+  "libsmime3.so": "libnss3",
+  "libnspr4.so": "libnspr4",
+  "libxcb-dri3.so.0": "libxcb-dri3-0",
+  "libXtst.so.6": "libxtst6",
+  "libcups.so.2": "libcups2",
+  "libdrm.so.2": "libdrm2",
+  "libXrandr.so.2": "libxrandr2",
+  "libgbm.so.1": "libgbm1",
+  "libasound.so.2": "libasound2",
+  "libatspi.so.0": "libatspi2.0-0",
+};