Made CPR optional, html generated at build time (#840)

- Fix potential crash on startup caused by logging macros being invoked before the logging system is initialized (null logger dereference in `ZenServerState::Sweep()`). `LoggerRef::ShouldLog` now guards against a null logger pointer.
- Make CPR an optional dependency (`--zencpr` build option, enabled by default) so builds can proceed without it
- Make zenvfs Windows-only (platform-specific target)
- Generate the frontend zip at build time from source HTML files instead of checking in a binary blob which would accumulate with every single update

1 files changed, 13 insertions, 6 deletions

diff --git a/src/zenhttp/httpclient.cpp b/src/zenhttp/httpclient.cpp
index deeeb6c85..9f49802a0 100644
--- a/src/zenhttp/httpclient.cpp
+++ b/src/zenhttp/httpclient.cpp
@@ -36,15 +36,17 @@
 
 namespace zen {
 
+#if ZEN_WITH_CPR
 extern HttpClientBase* CreateCprHttpClient(std::string_view			 BaseUri,
 										   const HttpClientSettings& ConnectionSettings,
 										   std::function<bool()>&&	 CheckIfAbortFunction);
+#endif
 
 extern HttpClientBase* CreateCurlHttpClient(std::string_view		  BaseUri,
 											const HttpClientSettings& ConnectionSettings,
 											std::function<bool()>&&	  CheckIfAbortFunction);
 
-static HttpClientBackend g_DefaultHttpClientBackend = HttpClientBackend::kCpr;
+static HttpClientBackend g_DefaultHttpClientBackend = HttpClientBackend::kCurl;
 
 void
 SetDefaultHttpClientBackend(HttpClientBackend Backend)
@@ -55,11 +57,14 @@ SetDefaultHttpClientBackend(HttpClientBackend Backend)
 void
 SetDefaultHttpClientBackend(std::string_view Backend)
 {
+#if ZEN_WITH_CPR
 	if (Backend == "cpr")
 	{
 		g_DefaultHttpClientBackend = HttpClientBackend::kCpr;
 	}
-	else if (Backend == "curl")
+	else
+#endif
+		if (Backend == "curl")
 	{
 		g_DefaultHttpClientBackend = HttpClientBackend::kCurl;
 	}
@@ -363,13 +368,15 @@ HttpClient::HttpClient(std::string_view BaseUri, const HttpClientSettings& Conne
 
 	switch (EffectiveBackend)
 	{
-		case HttpClientBackend::kCurl:
-			m_Inner = CreateCurlHttpClient(BaseUri, ConnectionSettings, std::move(CheckIfAbortFunction));
-			break;
+#if ZEN_WITH_CPR
 		case HttpClientBackend::kCpr:
-		default:
 			m_Inner = CreateCprHttpClient(BaseUri, ConnectionSettings, std::move(CheckIfAbortFunction));
 			break;
+#endif
+		case HttpClientBackend::kCurl:
+		default:
+			m_Inner = CreateCurlHttpClient(BaseUri, ConnectionSettings, std::move(CheckIfAbortFunction));
+			break;
 	}
 }