1 files changed, 26 insertions, 1 deletions
diff --git a/toolsrc/src/commands_autocomplete.cpp b/toolsrc/src/commands_autocomplete.cpp
index 71154445d..a67113aff 100644
--- a/toolsrc/src/commands_autocomplete.cpp
+++ b/toolsrc/src/commands_autocomplete.cpp
@@ -14,9 +14,34 @@ namespace vcpkg::Commands::Autocomplete
             Strings::format("The argument should be a command line to autocomplete.\n%s",
                             Commands::Help::create_example_string("autocomplete install z"));
 
-        args.check_max_arg_count(1, EXAMPLE);
+        args.check_min_arg_count(1, EXAMPLE);
+        args.check_max_arg_count(2, EXAMPLE);
         args.check_and_get_optional_command_arguments({});
 
+        const std::string requested_command = args.command_arguments.at(0);
+        const std::string start_with =
+            args.command_arguments.size() > 1 ? args.command_arguments.at(1) : Strings::EMPTY;
+
+        auto sources_and_errors = Paragraphs::try_load_all_ports(paths.get_filesystem(), paths.ports);
+        auto& source_paragraphs = sources_and_errors.paragraphs;
+
+        const auto& istartswith = Strings::case_insensitive_ascii_starts_with;
+
+        std::vector<std::string> results;
+        for (const auto& source_control_file : source_paragraphs)
+        {
+            auto&& sp = *source_control_file->core_paragraph;
+
+            if (istartswith(sp.name, start_with))
+            {
+                results.push_back(sp.name);
+            }
+        }
+
+        System::println(Strings::join(" ", results));
+
+        auto all_ports = Paragraphs::try_load_all_ports(paths.get_filesystem(), paths.ports);
+
         Checks::exit_success(VCPKG_LINE_INFO);
     }
 }