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python_manager.cpp
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python_manager.cpp
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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2023 Jon Evans <[email protected]>
* Copyright (C) 2023 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <wx/process.h>
#include <utility>
#include <paths.h>
#include <python_manager.h>
class PYTHON_PROCESS : public wxProcess
{
public:
PYTHON_PROCESS( std::function<void(int, const wxString&, const wxString&)> aCallback ) :
wxProcess(),
m_callback( std::move( aCallback ) )
{}
void OnTerminate( int aPid, int aStatus ) override
{
if( m_callback )
{
wxString output, error;
wxInputStream* processOut = GetInputStream();
size_t bytesRead = 0;
while( processOut->CanRead() && bytesRead < MAX_OUTPUT_LEN )
{
char buffer[4096];
buffer[ processOut->Read( buffer, sizeof( buffer ) - 1 ).LastRead() ] = '\0';
output.append( buffer, processOut->LastRead() );
bytesRead += processOut->LastRead();
}
processOut = GetErrorStream();
bytesRead = 0;
while( processOut->CanRead() && bytesRead < MAX_OUTPUT_LEN )
{
char buffer[4096];
buffer[ processOut->Read( buffer, sizeof( buffer ) - 1 ).LastRead() ] = '\0';
error.append( buffer, processOut->LastRead() );
bytesRead += processOut->LastRead();
}
m_callback( aStatus, output, error );
}
}
static constexpr size_t MAX_OUTPUT_LEN = 1024L * 1024L;
private:
std::function<void(int, const wxString&, const wxString&)> m_callback;
};
void PYTHON_MANAGER::Execute( const wxString& aArgs,
const std::function<void( int, const wxString&,
const wxString& )>& aCallback,
const wxExecuteEnv* aEnv )
{
PYTHON_PROCESS* process = new PYTHON_PROCESS( aCallback );
process->Redirect();
wxString cmd = wxString::Format( wxS( "%s %s" ), m_interpreterPath, aArgs );
long pid = wxExecute( cmd, wxEXEC_ASYNC, process, aEnv );
if( pid == 0 )
aCallback( -1, wxEmptyString, _( "Process could not be created" ) );
}
wxString PYTHON_MANAGER::FindPythonInterpreter()
{
#ifdef _WIN32
// TODO(JE) where
#else
wxArrayString output;
if( 0 == wxExecute( wxS( "which -a python3" ), output, wxEXEC_SYNC ) )
{
if( !output.IsEmpty() )
return output[0];
}
if( 0 == wxExecute( wxS( "which -a python" ), output, wxEXEC_SYNC ) )
{
if( !output.IsEmpty() )
return output[0];
}
#endif
return wxEmptyString;
}
std::optional<wxString> PYTHON_MANAGER::GetPythonEnvironment( const wxString& aNamespace )
{
wxFileName path( PATHS::GetUserCachePath(), wxEmptyString );
path.AppendDir( wxS( "python-environments" ) );
path.AppendDir( aNamespace );
if( !PATHS::EnsurePathExists( path.GetPath() ) )
return std::nullopt;
return path.GetPath();
}
std::optional<wxString> PYTHON_MANAGER::GetVirtualPython( const wxString& aNamespace )
{
std::optional<wxString> envPath = GetPythonEnvironment( aNamespace );
if( !envPath )
return std::nullopt;
wxFileName python( *envPath, wxEmptyString );
python.AppendDir( "bin" );
python.SetFullName( "python" );
if( !python.IsFileExecutable() )
return std::nullopt;
return python.GetFullPath();
}