bom_plugins.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2018 CERN
 * @author Maciej Suminski <maciej.suminski@cern.ch>
 *
 * 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, you may find one here:
 * https://www.gnu.org/licenses/gpl-3.0.html
 * or you may search the http://www.gnu.org website for the version 3 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#include "bom_plugins.h"
#include <config.h>
#include <paths.h>
#include <wx/ffile.h>
#include <wx/log.h>


const wxChar BOM_TRACE[] = wxT( "BOM_GENERATORS" );


BOM_GENERATOR_HANDLER::BOM_GENERATOR_HANDLER( const wxString& aFile )
    : m_storedPath( aFile )
{
    m_isOk = false;
    m_file = wxFileName( aFile );

    if( !wxFile::Exists( m_file.GetFullPath() ) )
        m_file = FindFilePath();

    if( !wxFile::Exists( m_file.GetFullPath() ) )
    {
        m_info.Printf( _("Script file:\n%s\nnot found. Script not available."), aFile );
        return;
    }

    m_isOk = true;

    m_name = m_file.GetName();
    wxString extension = m_file.GetExt().Lower();

    // Important note:
    // On Windows the right command command to run a python script is:
    // python <script_path>/script.py
    // and *not* python <script_path>\script.py
    // Otherwise the script does not find some auxiliary pythons scripts needed by this script
    if( extension == "xsl" )
    {
        m_info = readHeader( "-->" );
        m_cmd = wxString::Format( "xsltproc -o \"%%O%s\" \"%s\" \"%%I\"",
                                  getOutputExtension( m_info ), m_file.GetFullPath() );
    }
    else if( extension == "py" )
    {
        m_info = readHeader( "\"\"\"" );
#ifdef __WINDOWS__
        m_cmd = wxString::Format( "python \"%s/%s\" \"%%I\" \"%%O%s\"",
                                  m_file.GetPath(), m_file.GetFullName(),
                                  getOutputExtension( m_info ) );
#else
        wxString interpreter = wxString::FromUTF8Unchecked( PYTHON_EXECUTABLE );

        if( interpreter.IsEmpty() )
            interpreter = wxT( "python" );

        m_cmd = wxString::Format( "%s \"%s\" \"%%I\" \"%%O%s\"", interpreter, m_file.GetFullPath(),
                                  getOutputExtension( m_info ) );
#endif
    }
#ifdef __WINDOWS__
    else if( extension == "pyw" )
    {
        m_info = readHeader( "\"\"\"" );
        m_cmd = wxString::Format( "pythonw \"%s/%s\" \"%%I\" \"%%O%s\"",
                                  m_file.GetPath(), m_file.GetFullName(),
                                  getOutputExtension( m_info ) );
    }
#endif /* __WINDOWS__ */
    else // fallback
    {
        m_cmd = m_file.GetFullPath();
    }

    wxLogTrace( BOM_TRACE, "%s: extracted command line %s", m_name, m_cmd );
}


bool BOM_GENERATOR_HANDLER::IsValidGenerator( const wxString& aFile )
{
    wxFileName fn( aFile );
    wxString ext = fn.GetExt().Lower();

    for( const auto& pluginExt : { "xsl", "py", "pyw" } )
    {
        if( pluginExt == ext )
            return true;
    }

    return false;
}


wxString BOM_GENERATOR_HANDLER::readHeader( const wxString& aEndSection )
{
    if( aEndSection.IsEmpty() )
        return wxEmptyString;

    wxFFile fdata( m_file.GetFullPath(), "rb" );        // dtor will close the file
    wxString data;

    if( !fdata.ReadAll( &data ) )
        return wxEmptyString;

    const wxString header( "@package" );

    // Extract substring between @package and endsection
    int strstart = data.Find( header );

    if( strstart == wxNOT_FOUND )
        return wxEmptyString;

    strstart += header.Length();
    int strend = data.find( aEndSection, strstart );

    if( strend == wxNOT_FOUND )
        return wxEmptyString;

    // Remove empty line if any
    while( data[strstart] < ' ' )
            strstart++;

    return data.SubString( strstart, strend - 1 );
}


wxString BOM_GENERATOR_HANDLER::getOutputExtension( const wxString& aHeader )
{
    // search header for extension after %O (extension includes '.')
    // looks for output argument of the form `"%O.extension"`
    const wxString outputarg( "\"%O" );

    int strstart = aHeader.Find( outputarg );

    if( strstart == wxNOT_FOUND )
        return wxEmptyString;

    strstart += outputarg.Length();
    int strend = aHeader.find( "\"", strstart );

    if( strend == wxNOT_FOUND )
        return wxEmptyString;

    return aHeader.SubString( strstart, strend - 1 );
}


wxFileName BOM_GENERATOR_HANDLER::FindFilePath() const
{
    if( m_file.IsAbsolute() && m_file.Exists( wxFILE_EXISTS_REGULAR ) )
    {
        wxLogTrace( BOM_TRACE, "%s found directly", m_file.GetFullPath() );
        return m_file;
    }

    wxFileName test( PATHS::GetUserPluginsPath(), m_file.GetName(), m_file.GetExt() );

    if( test.Exists( wxFILE_EXISTS_REGULAR ) )
    {
        wxLogTrace( BOM_TRACE, "%s found in user plugins path %s", m_file.GetFullName(),
                    PATHS::GetUserPluginsPath() );
        return test;
    }

    test = wxFileName( PATHS::GetStockPluginsPath(), m_file.GetName(), m_file.GetExt() );

    if( test.Exists( wxFILE_EXISTS_REGULAR ) )
    {
        wxLogTrace( BOM_TRACE, "%s found in stock plugins path %s", m_file.GetFullName(),
                    PATHS::GetStockPluginsPath() );
        return test;
    }

    wxLogTrace( BOM_TRACE, "Could not find %s (checked %s, %s)", m_file.GetFullName(),
                PATHS::GetUserPluginsPath(), PATHS::GetStockPluginsPath() );

    return m_file;
}