[vcpkg] Record output from build process into log file (#10063)

1 files changed, 16 insertions, 3 deletions

diff --git a/toolsrc/src/vcpkg/build.cpp b/toolsrc/src/vcpkg/build.cpp
index b4b8a3485..d3f6302db 100644
--- a/toolsrc/src/vcpkg/build.cpp
+++ b/toolsrc/src/vcpkg/build.cpp
@@ -521,11 +521,24 @@ namespace vcpkg::Build
             else

                 return System::cmd_execute_modify_env(build_env_cmd, clean_env);

         });

-

-        const int return_code = System::cmd_execute(command, env);

 #else

-        const int return_code = System::cmd_execute_clean(command);

+        const auto& env = System::get_clean_environment();

 #endif

+        auto stdoutlog =

+            paths.buildtrees / action.spec.name() / ("stdout-" + action.spec.triplet().canonical_name() + ".log");

+        std::ofstream out_file(stdoutlog.native().c_str(), std::ios::out | std::ios::binary | std::ios::trunc);

+        Checks::check_exit(VCPKG_LINE_INFO, out_file, "Failed to open '%s' for writing", stdoutlog.u8string());

+        const int return_code = System::cmd_execute_and_stream_data(

+            command,

+            [&](StringView sv) {

+                System::print2(sv);

+                out_file.write(sv.data(), sv.size());

+                Checks::check_exit(

+                    VCPKG_LINE_INFO, out_file, "Error occurred while writing '%s'", stdoutlog.u8string());

+            },

+            env);

+        out_file.close();

+

         // With the exception of empty packages, builds in "Download Mode" always result in failure.

         if (action.build_options.only_downloads == Build::OnlyDownloads::YES)

         {