add and link libcurl

CMakeLists.txt

@@ -189,6 +189,7 @@ set(TEST_SCRIPT_ASSET_CACHE_SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/src/test-script
 
 find_package(fmt REQUIRED)
 find_package(CMakeRC REQUIRED)
+find_package(LibCURL REQUIRED)
 
 # === Target: locale-resources ===
 
@@ -223,6 +224,8 @@ target_compile_definitions(vcpkglib PUBLIC
     _FILE_OFFSET_BITS=64
 )
 
+target_link_libraries(vcpkglib PRIVATE CURL::libcurl)
+
 if(VCPKG_STANDALONE_BUNDLE_SHA)
     target_compile_definitions(vcpkglib PUBLIC
         "VCPKG_STANDALONE_BUNDLE_SHA=${VCPKG_STANDALONE_BUNDLE_SHA}"

cmake/FindLibCURL.cmake

@@ -0,0 +1,62 @@
+option(VCPKG_DEPENDENCY_EXTERNAL_LIBCURL "Use an external version of the libcurl library" OFF)
+
+# This option exists to allow the URI to be replaced with a Microsoft-internal URI in official
+# builds which have restricted internet access; see azure-pipelines/signing.yml
+# Note that the SHA512 is the same, so vcpkg-tool contributors need not be concerned that we built
+# with different content.
+if(NOT VCPKG_LIBCURL_URL)
+    set(VCPKG_LIBCURL_URL "https://github.com/curl/curl/archive/refs/tags/curl-8_8_0.tar.gz")
+endif()
+
+if(POLICY CMP0135)
+    cmake_policy(SET CMP0135 NEW)
+endif()
+
+include(FetchContent)
+FetchContent_Declare(
+    LibCURL
+    URL "${VCPKG_LIBCURL_URL}"
+    URL_HASH "SHA512=e66cbf9bd3ae7b9b031475210b80b883b6a133042fbbc7cf2413f399d1b38aa54ab7322626abd3c6f1af56e0d540221f618aa903bd6b463ac8324f2c4e92dfa8"
+)
+
+if(NOT LibCURL_FIND_REQUIRED)
+    message(FATAL_ERROR "LibCURL must be REQUIRED")
+endif()
+
+if(VCPKG_DEPENDENCY_EXTERNAL_FMT)
+    find_package(CURL REQUIRED)
+else()
+    block()
+        set(BUILD_SHARED_LIBS OFF)
+        set(BUILD_STATIC_LIBS ON)
+        set(BUILD_CURL_EXE OFF)
+        set(CURL_DISABLE_INSTALL OFF)
+        #set(CURL_STATIC_CRT ON)
+        set(ENABLE_UNICODE ON)
+        set(CURL_ENABLE_EXPORT_TARGET OFF)
+        set(BUILD_LIBCURL_DOCS  OFF)
+        set(BUILD_MISC_DOCS OFF)
+        set(ENABLE_CURL_MANUAL OFF)
+        set(CMAKE_DISABLE_FIND_PACKAGE_Perl ON)
+        set(CMAKE_DISABLE_FIND_PACKAGE_ZLIB ON)
+        set(CMAKE_DISABLE_FIND_PACKAGE_LibPSL ON)
+        set(CMAKE_DISABLE_FIND_PACKAGE_LibSSH2 ON)
+        if(MSVC) # This is in block() so no need to backup the variables
+            string(APPEND CMAKE_C_FLAGS " /wd6101")
+            string(APPEND CMAKE_C_FLAGS " /wd6011")
+            string(APPEND CMAKE_C_FLAGS " /wd6054")
+            string(APPEND CMAKE_C_FLAGS " /wd6240")
+            string(APPEND CMAKE_C_FLAGS " /wd6239")
+            string(APPEND CMAKE_C_FLAGS " /wd6323")
+            string(APPEND CMAKE_C_FLAGS " /wd6387")
+            string(APPEND CMAKE_C_FLAGS " /wd28182")
+            string(APPEND CMAKE_C_FLAGS " /wd28183")
+            string(APPEND CMAKE_C_FLAGS " /wd28251")      
+        endif()
+        FetchContent_MakeAvailable(LibCURL)        
+    endblock()
+    if(NOT TARGET CURL::libcurl)
+        add_library(CURL::libcurl INTERFACE)
+        target_link_libraries(CURL::libcurl PUBLIC libcurl_static)
+    endif()
+endif()

include/vcpkg/base/curl.h

@@ -0,0 +1,11 @@
+
+#ifdef _MSC_VER
+#pragma warning(push)           // Save current warning state
+#pragma warning(disable : 6101) // Disable specific warning (e.g., warning 4996)
+#endif
+
+#include <curl/curl.h>
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif

src/vcpkg/base/downloads.cpp

@@ -12,6 +12,7 @@
 #include <vcpkg/base/system.process.h>
 #include <vcpkg/base/system.proxy.h>
 #include <vcpkg/base/util.h>
+#include <vcpkg/base/curl.h>
 
 #include <vcpkg/commands.version.h>
 
@@ -379,6 +380,7 @@ namespace vcpkg
     {
 #define GUID_MARKER "5ec47b8e-6776-4d70-b9b3-ac2a57bc0a1c"
         static constexpr StringLiteral guid_marker = GUID_MARKER;
+        // TODO: Replace with libcurl code.
         Command prefix_cmd{"curl"};
         if (!prefixArgs.empty())
         {

src/vcpkg/metrics.cpp

@@ -8,6 +8,7 @@
 #include <vcpkg/base/system.mac.h>
 #include <vcpkg/base/system.process.h>
 #include <vcpkg/base/uuid.h>
+#include <vcpkg/base/curl.h>
 
 #include <vcpkg/commands.version.h>
 #include <vcpkg/metrics.h>
@@ -606,6 +607,7 @@ namespace vcpkg
         builder.string_arg(vcpkg_metrics_txt_path);
         cmd_execute_background(builder);
 #else
+        // TODO: replace with libcurl code
         cmd_execute_background(Command("curl")
                                    .string_arg("https://dc.services.visualstudio.com/v2/track")
                                    .string_arg("--max-time")