Added lldb rust formatters startup commands to lldb if debugging Rust

Author: eidheim

src/debug_lldb.cc

@@ -89,7 +89,7 @@ std::tuple<std::vector<std::string>, std::string, std::vector<std::string> > Deb
 
 void Debug::LLDB::start(const std::string &command, const boost::filesystem::path &path,
                   const std::vector<std::pair<boost::filesystem::path, int> > &breakpoints,
-                  const std::string &remote_host) {
+                  const std::vector<std::string> &startup_commands, const std::string &remote_host) {
   if(!debugger) {
     lldb::SBDebugger::Initialize();
     debugger=std::make_unique<lldb::SBDebugger>(lldb::SBDebugger::Create(true, log, nullptr));
@@ -181,6 +181,12 @@ void Debug::LLDB::start(const std::string &command, const boost::filesystem::pat
     debug_thread.join();
   for(auto &handler: on_start)
     handler(*process);
+  
+  for(auto &command: startup_commands) {
+    lldb::SBCommandReturnObject command_return_object;
+    debugger->GetCommandInterpreter().HandleCommand(command.c_str(), command_return_object, false);
+  }
+  
   debug_thread=std::thread([this]() {
     lldb::SBEvent event;
     while(true) {

src/debug_lldb.h

@@ -47,7 +47,7 @@ namespace Debug {
 
     void start(const std::string &command, const boost::filesystem::path &path="",
                const std::vector<std::pair<boost::filesystem::path, int> > &breakpoints={},
-               const std::string &remote_host="");
+               const std::vector<std::string> &startup_commands={}, const std::string &remote_host="");
     void continue_debug(); //can't use continue as function name
     void stop();
     void kill();

src/project.cc

@@ -365,7 +365,19 @@ void Project::LLDB::debug_start() {
         });
         on_event_it=std::prev(Debug::LLDB::get().on_event.end());
 
-        Debug::LLDB::get().start(*run_arguments, *project_path, breakpoints, remote_host);
+        std::vector<std::string> startup_commands;
+        if(dynamic_cast<CargoBuild*>(self->build.get())) {
+          std::stringstream istream, ostream;
+          if(Terminal::get().process(istream, ostream, "rustc --print sysroot")==0) {
+            auto sysroot=ostream.str();
+            while(!sysroot.empty() && (sysroot.back()=='\n' || sysroot.back()=='\r'))
+              sysroot.pop_back();
+            startup_commands.emplace_back("command script import \""+sysroot+"/lib/rustlib/etc/lldb_rust_formatters.py\"");
+            startup_commands.emplace_back("type summary add --no-value --python-function lldb_rust_formatters.print_val -x \".*\" --category Rust");
+            startup_commands.emplace_back("type category enable Rust");
+          }
+        }
+        Debug::LLDB::get().start(*run_arguments, *project_path, breakpoints, std::move(startup_commands), remote_host);
       });
     }
   });