[libdatachannel] Drop unused dep, fix DLL install, add test port (#40439)

ports/libdatachannel/library-linkage.diff

@@ -1,8 +1,16 @@
 diff --git a/CMakeLists.txt b/CMakeLists.txt
-index b35e4b1..1b5190b 100644
+index b35e4b1..b052d02 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
-@@ -457,11 +457,17 @@ if(WARNINGS_AS_ERRORS)
+@@ -48,7 +48,6 @@ endif()
+ 
+ list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/Modules)
+ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+-set(BUILD_SHARED_LIBS OFF) # to force usrsctp to be built static
+ 
+ if(WIN32)
+ 	add_definitions(-DWIN32_LEAN_AND_MEAN)
+@@ -457,11 +456,17 @@ if(WARNINGS_AS_ERRORS)
  	endif()
  endif()
  

ports/libdatachannel/portfile.cmake

@@ -33,6 +33,7 @@ vcpkg_fixup_pkgconfig()
 
 if(VCPKG_LIBRARY_LINKAGE STREQUAL "static")
     vcpkg_replace_string("${CURRENT_PACKAGES_DIR}/include/rtc/common.hpp" "#ifdef RTC_STATIC" "#if 1")
+    vcpkg_replace_string("${CURRENT_PACKAGES_DIR}/include/rtc/rtc.h" "#ifdef RTC_STATIC" "#if 1")
 endif()
 
 file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/include" "${CURRENT_PACKAGES_DIR}/debug/share")

ports/libdatachannel/vcpkg.json

@@ -1,6 +1,7 @@
 {
   "name": "libdatachannel",
   "version-semver": "0.21.2",
+  "port-version": 1,
   "description": "libdatachannel is a standalone implementation of WebRTC Data Channels, WebRTC Media Transport, and WebSockets in C++17 with C bindings for POSIX platforms (including GNU/Linux, Android, and Apple macOS) and Microsoft Windows.",
   "homepage": "https://github.com/paullouisageneau/libdatachannel",
   "license": "MPL-2.0",

scripts/test_ports/vcpkg-ci-libdatachannel/cmake-project.diff

@@ -0,0 +1,29 @@
+diff --git a/examples/streamer/CMakeLists.txt b/examples/streamer/CMakeLists.txt
+index 1bdeb7c..9cf65dd 100644
+--- a/examples/streamer/CMakeLists.txt
++++ b/examples/streamer/CMakeLists.txt
+@@ -2,6 +2,15 @@ cmake_minimum_required(VERSION 3.7)
+ if(POLICY CMP0079)
+ 	cmake_policy(SET CMP0079 NEW)
+ endif()
++project(vcpkg-ci)
++add_definitions(-DWIN32_LEAN_AND_MEAN)
++set(THREADS_PREFER_PTHREAD_FLAG ON)
++find_package(Threads REQUIRED)
++find_package(nlohmann_json CONFIG REQUIRED)
++find_package(LibDataChannel CONFIG REQUIRED)
++if(NOT TARGET LibDataChannel::LibDataChannel)
++	add_library(LibDataChannel::LibDataChannel ALIAS LibDataChannel::LibDataChannelStatic)
++endif()
+ 
+ set(STREAMER_SOURCES
+ 	main.cpp
+@@ -47,7 +56,7 @@ set_target_properties(streamer PROPERTIES
+ find_package(Threads REQUIRED)
+ target_link_libraries(streamer LibDataChannel::LibDataChannel Threads::Threads nlohmann_json::nlohmann_json)
+ 
+-if(MSVC)
++if(0)
+ 	add_custom_command(TARGET streamer POST_BUILD
+ 		COMMAND ${CMAKE_COMMAND} -E copy_if_different
+ 		"$<TARGET_FILE_DIR:datachannel>/datachannel.dll"

scripts/test_ports/vcpkg-ci-libdatachannel/portfile.cmake

@@ -0,0 +1,14 @@
+set(VCPKG_POLICY_EMPTY_PACKAGE enabled)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO paullouisageneau/libdatachannel
+    REF v0.21.2
+    SHA512 fd0d66bb932e29abc01e9f1a8b16ccb79012a7e3901e2e0f882f56ab2f090260945e1556c85ad07ef897b8c70fcdd44cdeead9955a9bca7afe1dda8900c473cc
+    HEAD_REF master
+    PATCHES 
+        cmake-project.diff
+)
+
+vcpkg_cmake_configure(SOURCE_PATH "${SOURCE_PATH}/examples/streamer")
+vcpkg_cmake_build()

scripts/test_ports/vcpkg-ci-libdatachannel/vcpkg.json

@@ -0,0 +1,19 @@
+{
+  "name": "vcpkg-ci-libdatachannel",
+  "version-string": "ci",
+  "description": "Validates libdatachannel",
+  "dependencies": [
+    {
+      "name": "libdatachannel",
+      "features": [
+        "srtp",
+        "ws"
+      ]
+    },
+    "nlohmann-json",
+    {
+      "name": "vcpkg-cmake",
+      "host": true
+    }
+  ]
+}

versions/baseline.json

@@ -4350,7 +4350,7 @@
     },
     "libdatachannel": {
       "baseline": "0.21.2",
-      "port-version": 0
+      "port-version": 1
     },
     "libdatrie": {
       "baseline": "0.2.13",

versions/l-/libdatachannel.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "df0663ab881ed7a331bf51b6bf652e80fc55dbf4",
+      "version-semver": "0.21.2",
+      "port-version": 1
+    },
     {
       "git-tree": "7ef5c0cdf31856f7b73f1498dd8055627608801c",
       "version-semver": "0.21.2",