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Improve Python detection

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ngosang 2015-07-25 14:26:56 +02:00
parent 7c7bb14a93
commit 38a6f4cc34
2 changed files with 52 additions and 98 deletions
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116
src/core/utils/misc.cpp
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@ -226,74 +226,56 @@ QPoint Utils::Misc::screenCenter(QWidget *win)
#endif
/**
* Detects the version of python by calling
* "python --version" and parsing the output.
* Detects the python version.
*/
int Utils::Misc::pythonVersion()
{
static int version = -1;
if (version < 0) {
QProcess python_proc;
QString versionComplete = pythonVersionComplete().trimmed();
QStringList splitted = versionComplete.split('.');
if (splitted.size() > 1) {
int highVer = splitted.at(0).toInt();
if ((highVer == 2) || (highVer == 3))
version = highVer;
}
}
return version;
}
/**
* Detects the python executable by calling "python --version".
*/
QString Utils::Misc::pythonExecutable()
{
static QString executable;
if (executable.isEmpty()) {
QProcess pythonProc;
#if defined(Q_OS_UNIX)
/*
* On Unix-Like Systems python2 and python3 should always exist
* http://legacy.python.org/dev/peps/pep-0394/
*/
python_proc.start("python3", QStringList() << "--version", QIODevice::ReadOnly);
if (python_proc.waitForFinished()) {
if (python_proc.exitCode() == 0) {
QByteArray output = python_proc.readAllStandardOutput();
if (output.isEmpty())
output = python_proc.readAllStandardError();
const QByteArray version_str = output.split(' ').last();
Logger::instance()->addMessage(QCoreApplication::translate("misc", "Python version: %1").arg(QString(version_str)), Log::INFO);
version = 3;
return 3;
}
pythonProc.start("python3", QStringList() << "--version", QIODevice::ReadOnly);
if (pythonProc.waitForFinished() && pythonProc.exitCode() == 0) {
executable = "python3";
return executable;
}
python_proc.start("python2", QStringList() << "--version", QIODevice::ReadOnly);
if (python_proc.waitForFinished()) {
if (python_proc.exitCode() == 0) {
QByteArray output = python_proc.readAllStandardOutput();
if (output.isEmpty())
output = python_proc.readAllStandardError();
const QByteArray version_str = output.split(' ').last();
Logger::instance()->addMessage(QCoreApplication::translate("misc", "Python version: %1").arg(QString(version_str)), Log::INFO);
version = 2;
return 2;
}
pythonProc.start("python2", QStringList() << "--version", QIODevice::ReadOnly);
if (pythonProc.waitForFinished() && pythonProc.exitCode() == 0) {
executable = "python2";
return executable;
}
#else
python_proc.start("python", QStringList() << "--version", QIODevice::ReadOnly);
if (!python_proc.waitForFinished()) return -1;
if (python_proc.exitCode() < 0) return -1;
QByteArray output = python_proc.readAllStandardOutput();
if (output.isEmpty())
output = python_proc.readAllStandardError();
const QByteArray version_str = output.split(' ').last();
Logger::instance()->addMessage(QCoreApplication::translate("misc", "Python version: %1").arg(QString(version_str)), Log::INFO);
if (version_str.startsWith("3."))
version = 3;
#endif
// Look for "python" in Windows and in UNIX if "python2" and "python3" are
// not detected.
pythonProc.start("python", QStringList() << "--version", QIODevice::ReadOnly);
if (pythonProc.waitForFinished() && pythonProc.exitCode() == 0)
executable = "python";
else
version = 2;
#endif
Logger::instance()->addMessage(QCoreApplication::translate("misc", "Python not detected"), Log::INFO);
}
return version;
}
QString Utils::Misc::pythonExecutable()
{
#if defined(Q_OS_UNIX)
/*
* On Unix-Like Systems python2 and python3 should always exist
* http://legacy.python.org/dev/peps/pep-0394/
*/
if (pythonVersion() == 3)
return "python3";
if (pythonVersion() == 2)
return "python2";
#endif
return "python";
return executable;
}
/**
@ -303,22 +285,20 @@ QString Utils::Misc::pythonExecutable()
*/
QString Utils::Misc::pythonVersionComplete() {
static QString version;
if (version.isEmpty()) {
if (pythonVersion() < 0)
return QString();
QProcess python_proc;
python_proc.start(pythonExecutable(), QStringList() << "--version", QIODevice::ReadOnly);
if (!python_proc.waitForFinished()) return QString();
if (python_proc.exitCode() < 0) return QString();
QByteArray output = python_proc.readAllStandardOutput();
if (output.isEmpty())
output = python_proc.readAllStandardError();
const QByteArray version_str = output.split(' ').last();
version = version_str;
if (pythonExecutable().isEmpty())
return version;
QProcess pythonProc;
pythonProc.start(pythonExecutable(), QStringList() << "--version", QIODevice::ReadOnly);
if (pythonProc.waitForFinished() && pythonProc.exitCode() == 0) {
QByteArray output = pythonProc.readAllStandardOutput();
if (output.isEmpty())
output = pythonProc.readAllStandardError();
const QByteArray versionStr = output.split(' ').last();
version = versionStr.trimmed();
Logger::instance()->addMessage(QCoreApplication::translate("misc", "Python version: %1").arg(version), Log::INFO);
}
}
return version;
}