[libressl] Fail if openssl is installed (#40924)

ports/libressl/portfile.cmake

@@ -1,7 +1,5 @@
 if(EXISTS "${CURRENT_INSTALLED_DIR}/include/openssl/ssl.h")
-  message(WARNING "Can't build libressl if openssl is installed. Please remove openssl, and try install libressl again if you need it. Build will continue since libressl is a subset of openssl")
-  set(VCPKG_POLICY_EMPTY_PACKAGE enabled)
-  return()
+    message(FATAL_ERROR "Can't build libressl if openssl is installed. Please remove openssl, and try install libressl again if you need it.")
 endif()
 
 vcpkg_download_distfile(

ports/libressl/vcpkg.json

@@ -1,6 +1,7 @@
 {
   "name": "libressl",
   "version": "3.9.2",
+  "port-version": 1,
   "description": "LibreSSL is a version of the TLS/crypto stack forked from OpenSSL in 2014, with goals of modernizing the codebase, improving security, and applying best practice development processes.",
   "license": "ISC",
   "dependencies": [

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

@@ -0,0 +1,4 @@
+set(VCPKG_POLICY_EMPTY_PACKAGE enabled)
+
+vcpkg_cmake_configure(SOURCE_PATH "${CURRENT_PORT_DIR}/project")
+vcpkg_cmake_build()

scripts/test_ports/vcpkg-ci-libressl/project/CMakeLists.txt

@@ -0,0 +1,33 @@
+cmake_minimum_required(VERSION 3.7)
+project(libressl-test CXX)
+
+# libressl promises openssl compatibility
+# NB: The port doesn't provide a wrapper, so there is no support
+#     for multi-config and for transitive usage requirements.
+find_package(OpenSSL MODULE REQUIRED)
+foreach(target IN ITEMS OpenSSL::SSL OpenSSL::Crypto)
+    set(location_found FALSE)
+    foreach(property IN ITEMS IMPORTED_LOCATION IMPORTED_LOCATION_DEBUG IMPORTED_LOCATION_RELEASE)
+        get_target_property(location ${target} ${property})
+        if(NOT location)
+            continue()
+        endif()
+        set(location_found TRUE)
+        message(STATUS "${target} ${property}: ${location}")
+        string(FIND "${location}" "${VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}" index)
+        if(NOT index STREQUAL "0")
+            message(SEND_ERROR "${target} ${property} is not from vcpkg.")
+        endif()
+    endforeach()
+    if(NOT location_found)
+        message(SEND_ERROR "No location for ${target} binary")
+    endif()
+endforeach()
+
+# libressl provides cmake config
+find_package(LibreSSL CONFIG REQUIRED)
+message(STATUS "LibreSSL CONFIG: ${LibreSSL_DIR}")
+string(FIND "${LibreSSL_DIR}" "${VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}" index)
+if(NOT index STREQUAL "0")
+    message(SEND_ERROR "LibreSSL CONFIG is not from vcpkg.")
+endif()

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

@@ -0,0 +1,12 @@
+{
+  "name": "vcpkg-ci-libressl",
+  "version-string": "ci",
+  "description": "Validates libressl",
+  "dependencies": [
+    "libressl",
+    {
+      "name": "vcpkg-cmake",
+      "host": true
+    }
+  ]
+}

versions/baseline.json

@@ -4986,7 +4986,7 @@
     },
     "libressl": {
       "baseline": "3.9.2",
-      "port-version": 0
+      "port-version": 1
     },
     "librsvg": {
       "baseline": "2.40.20",

versions/l-/libressl.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "f9e56b0af8f93ed5c5adc5e2ba1696e5c16420be",
+      "version": "3.9.2",
+      "port-version": 1
+    },
     {
       "git-tree": "212859e945d993b860716eaa47b8f83ef52efbb2",
       "version": "3.9.2",