1 files changed, 49 insertions, 1 deletions
diff --git a/toolsrc/src/VcpkgPaths.cpp b/toolsrc/src/VcpkgPaths.cpp
index 906a5e67f..71a35d24c 100644
--- a/toolsrc/src/VcpkgPaths.cpp
+++ b/toolsrc/src/VcpkgPaths.cpp
@@ -268,6 +268,19 @@ namespace vcpkg
 
         return nullopt;
     }
+    
+    static Optional<fs::path> get_vs2013_installation_instance()
+    {
+        const Optional<std::wstring> vs2013_cmntools_optional = System::get_environment_variable(L"VS120COMNTOOLS");
+        if (const auto v = vs2013_cmntools_optional.get())
+        {
+            const fs::path vs2013_cmntools = fs::path(*v).parent_path(); // The call to parent_path() is needed because
+                                                                         // the env variable has a trailing backslash
+            return vs2013_cmntools.parent_path().parent_path();
+        }
+
+        return nullopt;
+    }
 
     static std::vector<Toolset> find_toolset_instances(const VcpkgPaths& paths)
     {
@@ -275,12 +288,46 @@ namespace vcpkg
 
         const auto& fs = paths.get_filesystem();
 
-        const std::vector<std::string> vs2017_installation_instances = get_vs2017_installation_instances(paths);
         // Note: this will contain a mix of vcvarsall.bat locations and dumpbin.exe locations.
         std::vector<fs::path> paths_examined;
 
         std::vector<Toolset> found_toolsets;
 
+        // VS2013
+        const Optional<fs::path> vs_2013_installation_instance = get_vs2013_installation_instance();
+        if (const auto v = vs_2013_installation_instance.get())
+        {
+            const fs::path vs2013_vcvarsall_bat = *v / "VC" / "vcvarsall.bat";
+
+            paths_examined.push_back(vs2013_vcvarsall_bat);
+            if (fs.exists(vs2013_vcvarsall_bat))
+            {
+                const fs::path vs2013_dumpbin_exe = *v / "VC" / "bin" / "dumpbin.exe";
+                paths_examined.push_back(vs2013_dumpbin_exe);
+
+                const fs::path vs2013_bin_dir = vs2013_vcvarsall_bat.parent_path() / "bin";
+                std::vector<ToolsetArchOption> supported_architectures;
+                if (fs.exists(vs2013_bin_dir / "vcvars32.bat"))
+                    supported_architectures.push_back({L"x86", CPU::X86, CPU::X86});
+                if (fs.exists(3 / "amd64\\vcvars64.bat"))
+                    supported_architectures.push_back({L"x64", CPU::X64, CPU::X64});
+                if (fs.exists(vs2013_bin_dir / "x86_amd64\\vcvarsx86_amd64.bat"))
+                    supported_architectures.push_back({L"x86_amd64", CPU::X86, CPU::X64});
+                if (fs.exists(vs2013_bin_dir / "x86_arm\\vcvarsx86_arm.bat"))
+                    supported_architectures.push_back({L"x86_arm", CPU::X86, CPU::ARM});
+                if (fs.exists(vs2013_bin_dir / "amd64_x86\\vcvarsamd64_x86.bat"))
+                    supported_architectures.push_back({L"amd64_x86", CPU::X64, CPU::X86});
+                if (fs.exists(vs2013_bin_dir / "amd64_arm\\vcvarsamd64_arm.bat"))
+                    supported_architectures.push_back({L"amd64_arm", CPU::X64, CPU::ARM});
+
+                if (fs.exists(vs2013_dumpbin_exe))
+                {
+                    found_toolsets.push_back(
+                        {vs2013_dumpbin_exe, vs2013_vcvarsall_bat, L"v120", supported_architectures});
+                }
+            }
+        }
+        
         // VS2015
         const Optional<fs::path> vs_2015_installation_instance = get_vs2015_installation_instance();
         if (const auto v = vs_2015_installation_instance.get())
@@ -318,6 +365,7 @@ namespace vcpkg
 
         // VS2017
         Optional<Toolset> vs2017_toolset;
+        const std::vector<std::string> vs2017_installation_instances = get_vs2017_installation_instances(paths);
         for (const std::string& instance : vs2017_installation_instances)
         {
             const fs::path vc_dir = fs::path{instance} / "VC";