[libcalamares] Add overload of target_env_call to pybind11

Python code that would run with Boost::Python, calling
target_env_call() with a single string parameter, would
fail in pybind11. Add the missing overload.

src/libcalamares/pybind11/Api.cpp

@@ -186,6 +186,17 @@ target_env_call( const List& args, const std::string& input, int timeout )
         .first;
 }
 
+int
+target_env_call( const std::string& command, const std::string& input, int timeout )
+{
+    return Calamares::System::instance()
+        ->targetEnvCommand( { QString::fromStdString( command ) },
+                            QString(),
+                            QString::fromStdString( input ),
+                            std::chrono::seconds( timeout ) )
+        .first;
+}
+
 int
 check_target_env_call( const List& args, const std::string& input, int timeout )
 {

src/libcalamares/pybind11/Api.h

@@ -30,6 +30,7 @@ class PythonJob;
 namespace Python __attribute__( ( visibility( "hidden" ) ) )
 {
     int target_env_call( const List& args, const std::string& input, int timeout );
+    int target_env_call( const std::string& command, const std::string& input, int timeout );
     int check_target_env_call( const List& args, const std::string& input, int timeout );
     std::string check_target_env_output( const List& args, const std::string& input, int timeout );
 

src/libcalamares/pybind11/PythonJob.cpp

@@ -93,7 +93,13 @@ populate_utils( py::module_& m )
     m.def( "load_yaml", &Calamares::Python::load_yaml, "Loads YAML from a file." );
 
     m.def( "target_env_call",
-           &Calamares::Python::target_env_call,
+           py::overload_cast<const Calamares::Python::List& , const std::string& , int >(&Calamares::Python::target_env_call),
+           "Runs command_list in target, returns exit code.",
+           py::arg( "command_list" ),
+           py::arg( "input" ) = std::string(),
+           py::arg( "timeout" ) = 0 );
+    m.def( "target_env_call",
+           py::overload_cast<const std::string& , const std::string& , int >(&Calamares::Python::target_env_call),
            "Runs command in target, returns exit code.",
            py::arg( "command_list" ),
            py::arg( "input" ) = std::string(),