fix(ci): install only Chromium for Playwright and wait on dpkg lock

src/TUnit.Templates/content/TUnit.Playwright/Hooks.cs

@@ -12,7 +12,9 @@ public static void InstallPlaywright()
             Environment.SetEnvironmentVariable("PWDEBUG", "1");
         }
 
-        var exitCode = Microsoft.Playwright.Program.Main(["install"]);
+        // Tests use Chromium by default (PlaywrightTest.BrowserName). Add "firefox" or "webkit"
+        // here if you override BrowserName, so unused browsers are not downloaded.
+        var exitCode = Microsoft.Playwright.Program.Main(["install", "chromium"]);
         if (exitCode != 0)
         {
             // On Linux, browsers also need system libraries: run `playwright install --with-deps` once.

tests/TUnit.Templates.Tests/Snapshots/InstantiationTest.TUnit.Playwright._.verified/TUnit.Playwright/Hooks.cs

@@ -12,7 +12,9 @@ public static void InstallPlaywright()
             Environment.SetEnvironmentVariable("PWDEBUG", "1");
         }
 
-        var exitCode = Microsoft.Playwright.Program.Main(["install"]);
+        // Tests use Chromium by default (PlaywrightTest.BrowserName). Add "firefox" or "webkit"
+        // here if you override BrowserName, so unused browsers are not downloaded.
+        var exitCode = Microsoft.Playwright.Program.Main(["install", "chromium"]);
         if (exitCode != 0)
         {
             // On Linux, browsers also need system libraries: run `playwright install --with-deps` once.

tools/TUnit.Pipeline/Modules/InstallPlaywrightModule.cs

@@ -19,11 +19,24 @@ protected override ModuleConfiguration Configure() => ModuleConfiguration.Create
 
     protected override async Task<CommandResult?> ExecuteAsync(IModuleContext context, CancellationToken cancellationToken)
     {
+        if (OperatingSystem.IsLinux())
+        {
+            // Cancelling a timed-out attempt kills bash but not the sudo'd apt-get
+            // that Playwright spawns, so the retry fails instantly on the dpkg lock.
+            // Make apt wait for the lock instead.
+            await context.Shell.Bash.Command(
+                new BashCommandOptions("echo 'DPkg::Lock::Timeout \"300\";' | sudo tee /etc/apt/apt.conf.d/99-tunit-lock-timeout"),
+                cancellationToken);
+        }
+
         using var attemptCts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
         attemptCts.CancelAfter(PerAttemptTimeout);
 
+        // Only Chromium is used by the Playwright tests. Installing every browser
+        // pulls in the WebKit/Firefox GStreamer apt dependencies, which can take
+        // longer than the per-attempt timeout on its own.
         return await context.Shell.Bash.Command(
-            new BashCommandOptions("npx playwright install --with-deps"),
+            new BashCommandOptions("npx playwright install --with-deps chromium"),
             attemptCts.Token);
     }
 }