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Rewrite Python error handling to show meaningful messages.

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This commit is contained in:
Teo Mrnjavac 2014-07-22 17:48:05 +02:00
parent 0234415976
commit c6c2c67560
1 changed files with 59 additions and 15 deletions
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74
src/libcalamares/PythonHelper.cpp
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@ -212,23 +212,67 @@ Helper::createCleanNamespace()
QString
Helper::handleLastError()
{
using namespace boost::python;
using namespace boost;
PyObject *type = nullptr, *val = nullptr, *tb = nullptr;
PyErr_Fetch( &type, &val, &tb );
PyObject *exc,*val,*tb;
object formatted_list, formatted;
PyErr_Fetch(&exc,&val,&tb);
handle<> hexc(exc),hval(allow_null(val)),htb(allow_null(tb));
object traceback(import("traceback"));
if (!tb) {
object format_exception_only(traceback.attr("format_exception_only"));
formatted_list = format_exception_only(hexc,hval);
} else {
object format_exception(traceback.attr("format_exception"));
formatted_list = format_exception(hexc,hval,htb);
QString typeMsg;
if ( type != nullptr )
{
bp::handle<> h_type( type );
bp::str pystr( h_type );
bp::extract< std::string > extracted( pystr );
if ( extracted.check() )
typeMsg = QString::fromStdString( extracted() ).toHtmlEscaped();
if ( typeMsg.trimmed().isEmpty() )
typeMsg = tr( "Unknown exception type" );
}
formatted = str("\n").join(formatted_list);
return QString::fromStdString( extract<std::string>(formatted) );
QString valMsg;
if ( val != nullptr )
{
bp::handle<> h_val( val );
bp::str pystr( h_val );
bp::extract< std::string > extracted( pystr );
if ( extracted.check() )
valMsg = QString::fromStdString( extracted() ).toHtmlEscaped();
if ( valMsg.trimmed().isEmpty() )
valMsg = tr( "unparseable Python error" );
}
QString tbMsg;
if ( tb != nullptr )
{
bp::handle<> h_tb( tb );
bp::object tb( bp::import( "traceback" ) );
bp::object format_tb( tb.attr( "format_tb" ) );
bp::object tb_list( format_tb( h_tb ) );
bp::object pystr( bp::str( "\n" ).join( tb_list ) );
bp::extract< std::string > extracted( pystr );
if ( extracted.check() )
tbMsg = QString::fromStdString( extracted() ).toHtmlEscaped();
if ( tbMsg.trimmed().isEmpty() )
tbMsg = tr( "unparseable Python traceback" );
}
if ( typeMsg.isEmpty() && valMsg.isEmpty() && tbMsg.isEmpty() )
return tr( "Unfetchable Python error." );
QStringList msgList;
if ( !typeMsg.isEmpty() )
msgList.append( QString( "<strong>%1</strong>" ).arg( typeMsg ) );
if ( !valMsg.isEmpty() )
msgList.append( valMsg );
if ( !tbMsg.isEmpty() )
msgList.append( QString( "</code>Traceback:<code><br/>%1" ).arg( tbMsg ) );
return QString( "<code>%1</code>" ).arg( msgList.join( "<br/>" ) );
}