From e803bf11296d8e7900dafb41e7b1224778d33dc6 Mon Sep 17 00:00:00 2001
From: nicole mazzuca <mazzucan@outlook.com>
Date: Thu, 19 Nov 2020 21:39:08 -0800
Subject: [PATCH] [vcpkg] fix cmake paths in tags (alternative 2) (#14661)

* [vcpkg] fix cmake paths in tags (alternative 2)

* fix compile on VS2019

unnecessary and invalid SFINAE'd constructor
---
 toolsrc/include/vcpkg/base/span.h |  5 -----
 toolsrc/src/vcpkg/cmakevars.cpp   | 24 ++++++++++++++++++------
 2 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/toolsrc/include/vcpkg/base/span.h b/toolsrc/include/vcpkg/base/span.h
index 91d94ec473..7748222cfa 100644
--- a/toolsrc/include/vcpkg/base/span.h
+++ b/toolsrc/include/vcpkg/base/span.h
@@ -32,11 +32,6 @@ namespace vcpkg
         {
         }
 
-        template<size_t N, class = std::enable_if_t<std::is_const<T>::value>>
-        constexpr Span(std::remove_const_t<T> (&arr)[N]) noexcept : m_ptr(arr), m_count(N)
-        {
-        }
-
         template<class Range,
                  class = decltype(std::declval<Range>().data()),
                  class = std::enable_if_t<!std::is_same<std::decay_t<Range>, Span>::value>>
diff --git a/toolsrc/src/vcpkg/cmakevars.cpp b/toolsrc/src/vcpkg/cmakevars.cpp
index 69326fffc5..39a4d18b07 100644
--- a/toolsrc/src/vcpkg/cmakevars.cpp
+++ b/toolsrc/src/vcpkg/cmakevars.cpp
@@ -85,17 +85,29 @@ namespace vcpkg::CMakeVars
         {
             emitted_triplets[spec_abi_setting.first->package_spec.triplet()] = emitted_triplet_id++;
         }
+
         Strings::append(extraction_file, "macro(vcpkg_triplet_file VCPKG_TRIPLET_ID)\n");
+        Strings::append(extraction_file,
+                        "set(_vcpkg_triplet_file_BACKUP_CURRENT_LIST_FILE \"${CMAKE_CURRENT_LIST_FILE}\")\n");
+
         for (auto& p : emitted_triplets)
         {
-            Strings::append(extraction_file,
-                            "if(VCPKG_TRIPLET_ID EQUAL ",
-                            p.second,
-                            ")\n",
-                            fs.read_contents(paths.get_triplet_file_path(p.first), VCPKG_LINE_INFO),
-                            "\nendif()\n");
+            auto path_to_triplet = paths.get_triplet_file_path(p.first);
+            Strings::append(extraction_file, "if(VCPKG_TRIPLET_ID EQUAL ", p.second, ")\n");
+            Strings::append(
+                extraction_file, "set(CMAKE_CURRENT_LIST_FILE \"", fs::generic_u8string(path_to_triplet), "\")\n");
+            Strings::append(
+                extraction_file,
+                "get_filename_component(CMAKE_CURRENT_LIST_DIR \"${CMAKE_CURRENT_LIST_FILE}\" DIRECTORY)\n");
+            Strings::append(extraction_file, fs.read_contents(paths.get_triplet_file_path(p.first), VCPKG_LINE_INFO));
+            Strings::append(extraction_file, "\nendif()\n");
         }
+        Strings::append(extraction_file,
+                        "set(CMAKE_CURRENT_LIST_FILE \"${_vcpkg_triplet_file_BACKUP_CURRENT_LIST_FILE}\")\n");
+        Strings::append(extraction_file,
+                        "get_filename_component(CMAKE_CURRENT_LIST_DIR \"${CMAKE_CURRENT_LIST_FILE}\" DIRECTORY)\n");
         Strings::append(extraction_file, "endmacro()\n");
+
         for (const auto& spec_abi_setting : spec_abi_settings)
         {
             const FullPackageSpec& spec = *spec_abi_setting.first;