[vcpkg] Resolve relative overlay ports to the current working directory. (#11233)

Fixes #10771.

toolsrc/include/vcpkg/vcpkgpaths.h

@@ -61,7 +61,8 @@ namespace vcpkg
                                            const Optional<fs::path>& install_root_dir,
                                            const Optional<fs::path>& vcpkg_scripts_root_dir,
                                            const std::string& default_vs_path,
-                                           const std::vector<std::string>* triplets_dirs);
+                                           const std::vector<std::string>* triplets_dirs,
+                                           fs::path original_cwd);
 
         fs::path package_dir(const PackageSpec& spec) const;
         fs::path build_info_file_path(const PackageSpec& spec) const;
@@ -72,6 +73,7 @@ namespace vcpkg
         const std::vector<TripletFile>& get_available_triplets() const;
         const fs::path get_triplet_file_path(Triplet triplet) const;
 
+        fs::path original_cwd;
         fs::path root;
         fs::path packages;
         fs::path buildtrees;

toolsrc/src/vcpkg.cpp

@@ -119,22 +119,30 @@ static void inner(const VcpkgCmdArguments& args)
     Debug::print("Using vcpkg-root: ", vcpkg_root_dir.u8string(), '\n');
 
     Optional<fs::path> install_root_dir;
-    if (args.install_root_dir) {
+    if (args.install_root_dir)
+    {
         install_root_dir = Files::get_real_filesystem().canonical(VCPKG_LINE_INFO, fs::u8path(*args.install_root_dir));
         Debug::print("Using install-root: ", install_root_dir.value_or_exit(VCPKG_LINE_INFO).u8string(), '\n');
     }
 
-    Optional<fs::path> vcpkg_scripts_root_dir = nullopt;
+    Optional<fs::path> vcpkg_scripts_root_dir;
     if (args.scripts_root_dir)
     {
-        vcpkg_scripts_root_dir = Files::get_real_filesystem().canonical(VCPKG_LINE_INFO, fs::u8path(*args.scripts_root_dir));
+        vcpkg_scripts_root_dir =
+            Files::get_real_filesystem().canonical(VCPKG_LINE_INFO, fs::u8path(*args.scripts_root_dir));
         Debug::print("Using scripts-root: ", vcpkg_scripts_root_dir.value_or_exit(VCPKG_LINE_INFO).u8string(), '\n');
     }
 
     auto default_vs_path = System::get_environment_variable("VCPKG_VISUAL_STUDIO_PATH").value_or("");
 
-    const Expected<VcpkgPaths> expected_paths =
-        VcpkgPaths::create(vcpkg_root_dir, install_root_dir, vcpkg_scripts_root_dir, default_vs_path, args.overlay_triplets.get());
+    auto original_cwd = Files::get_real_filesystem().current_path(VCPKG_LINE_INFO);
+
+    const Expected<VcpkgPaths> expected_paths = VcpkgPaths::create(vcpkg_root_dir,
+                                                                   install_root_dir,
+                                                                   vcpkg_scripts_root_dir,
+                                                                   default_vs_path,
+                                                                   args.overlay_triplets.get(),
+                                                                   original_cwd);
     Checks::check_exit(VCPKG_LINE_INFO,
                        !expected_paths.error(),
                        "Error: Invalid vcpkg root directory %s: %s",

toolsrc/src/vcpkg/portfileprovider.cpp

@@ -1,5 +1,6 @@
 #include <pch.h>
 
+#include <vcpkg/base/system.debug.h>
 #include <vcpkg/paragraphs.h>
 #include <vcpkg/portfileprovider.h>
 #include <vcpkg/sourceparagraph.h>
@@ -34,7 +35,9 @@ namespace vcpkg::PortFileProvider
             {
                 if (!overlay_path.empty())
                 {
-                    auto overlay = fs.canonical(VCPKG_LINE_INFO, fs::u8path(overlay_path));
+                    auto overlay = fs.canonical(VCPKG_LINE_INFO, paths.original_cwd / fs::u8path(overlay_path));
+
+                    Debug::print("Using overlay: ", overlay.u8string(), "\n");
 
                     Checks::check_exit(VCPKG_LINE_INFO,
                                        filesystem.exists(overlay),

toolsrc/src/vcpkg/vcpkgpaths.cpp

@@ -17,7 +17,8 @@ namespace vcpkg
                                             const Optional<fs::path>& install_root_dir,
                                             const Optional<fs::path>& vcpkg_scripts_root_dir,
                                             const std::string& default_vs_path,
-                                            const std::vector<std::string>* triplets_dirs)
+                                            const std::vector<std::string>* triplets_dirs,
+                                            fs::path original_cwd)
     {
         auto& fs = Files::get_real_filesystem();
         std::error_code ec;
@@ -30,6 +31,7 @@ namespace vcpkg
         VcpkgPaths paths;
         paths.root = canonical_vcpkg_root_dir;
         paths.default_vs_path = default_vs_path;
+        paths.original_cwd = original_cwd;
 
         if (paths.root.empty())
         {
@@ -66,9 +68,12 @@ namespace vcpkg
         }
 
         paths.ports = paths.root / "ports";
-        if (auto d = install_root_dir.get()) {
-            paths.installed = fs.absolute(VCPKG_LINE_INFO, std::move(*d));
-        } else {
+        if (auto d = install_root_dir.get())
+        {
+            paths.installed = fs.absolute(VCPKG_LINE_INFO, *d);
+        }
+        else
+        {
             paths.installed = paths.root / "installed";
         }
         paths.triplets = paths.root / "triplets";