qt-creator/src/libs/utils/qtcprocess.h

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#pragma once

#include "utils_global.h"

#include "environment.h"
#include "commandline.h"
#include "processenums.h"
#include "processinterface.h"
#include "qtcassert.h"

#include <QProcess>

QT_FORWARD_DECLARE_CLASS(QDebug)
QT_FORWARD_DECLARE_CLASS(QTextCodec)

class tst_QtcProcess;

namespace Utils {

namespace Internal { class QtcProcessPrivate; }

class DeviceProcessHooks;

class QTCREATOR_UTILS_EXPORT QtcProcess : public ProcessInterface
{
    Q_OBJECT

public:
    QtcProcess(QObject *parent = nullptr);
    ~QtcProcess();

    // ProcessInterface related

    void start() override;
    void interrupt() override;
    void terminate() override;
    void kill() override;
    void close() final;

    QByteArray readAllStandardOutput() override;
    QByteArray readAllStandardError() override;
    qint64 write(const QByteArray &input) override;

    qint64 processId() const override;
    QProcess::ProcessState state() const override;
    int exitCode() const override;
    QProcess::ExitStatus exitStatus() const override;

    QProcess::ProcessError error() const final;
    QString errorString() const override;
    void setErrorString(const QString &str) final;

    bool waitForStarted(int msecs = 30000) final;
    bool waitForReadyRead(int msecs = 30000) final;
    bool waitForFinished(int msecs = 30000) final;

    void kickoffProcess() final;
    qint64 applicationMainThreadID() const final;

    // ProcessSetupData related

    void setProcessImpl(ProcessImpl processImpl);

    void setTerminalMode(TerminalMode mode);
    TerminalMode terminalMode() const;
    bool usesTerminal() const { return terminalMode() != TerminalMode::Off; }

    void setProcessMode(ProcessMode processMode);
    ProcessMode processMode() const;

    void setEnvironment(const Environment &env);
    void unsetEnvironment();
    const Environment &environment() const;
    bool hasEnvironment() const;

    void setRemoteEnvironment(const Environment &env);
    Environment remoteEnvironment() const;

    void setCommand(const CommandLine &cmdLine);
    const CommandLine &commandLine() const;

    void setWorkingDirectory(const FilePath &dir);
    FilePath workingDirectory() const;

    void setWriteData(const QByteArray &writeData);

    void setUseCtrlCStub(bool enabled); // debug only
    void setLowPriority();
    void setDisableUnixTerminal();
    void setRunAsRoot(bool on);
    bool isRunAsRoot() const;
    void setAbortOnMetaChars(bool abort);

    void setProcessChannelMode(QProcess::ProcessChannelMode mode);
    void setStandardInputFile(const QString &inputFile);

    void setExtraData(const QString &key, const QVariant &value);
    QVariant extraData(const QString &key) const;

    void setExtraData(const QVariantHash &extraData);
    QVariantHash extraData() const;

    static void setRemoteProcessHooks(const DeviceProcessHooks &hooks);

    // TODO: Some usages of this method assume that Starting phase is also a running state
    // i.e. if isRunning() returns false, they assume NotRunning state, what may be an error.
    bool isRunning() const; // Short for state() == QProcess::Running.

    // Other enhancements.
    // These (or some of them) may be potentially moved outside of the class.
    // For some we may aggregate in another public utils class (or subclass of QtcProcess)?

    // TODO: How below 3 methods relate to QtcProcess? Action: move them somewhere else.
    // Helpers to find binaries. Do not use it for other path variables
    // and file types.
    static QString locateBinary(const QString &binary);
    static QString locateBinary(const QString &path, const QString &binary);
    static QString normalizeNewlines(const QString &text);

    // TODO: Unused currently? Should it serve as a compartment for contrary of remoteEnvironment?
    static Environment systemEnvironmentForBinary(const FilePath &filePath);

    static bool startDetached(const CommandLine &cmd, const FilePath &workingDirectory = {},
                              qint64 *pid = nullptr);

    // Starts the command and waits for finish.
    // User input processing is enabled when WithEventLoop was passed.
    void runBlocking(EventLoopMode eventLoopMode = EventLoopMode::Off);

    /* Timeout for hanging processes (triggers after no more output
     * occurs on stderr/stdout). */
    void setTimeoutS(int timeoutS);

    // TODO: We should specify the purpose of the codec, e.g. setCodecForStandardChannel()
    void setCodec(QTextCodec *c);
    void setTimeOutMessageBoxEnabled(bool);
    void setExitCodeInterpreter(const ExitCodeInterpreter &interpreter);

    void setStdOutCallback(const std::function<void(const QString &)> &callback);
    void setStdOutLineCallback(const std::function<void(const QString &)> &callback);
    void setStdErrCallback(const std::function<void(const QString &)> &callback);
    void setStdErrLineCallback(const std::function<void(const QString &)> &callback);

    bool stopProcess();
    bool readDataFromProcess(int timeoutS, QByteArray *stdOut, QByteArray *stdErr,
                             bool showTimeOutMessageBox);

    ProcessResult result() const;
    void setResult(const ProcessResult &result);

    QByteArray allRawOutput() const;
    QString allOutput() const;

    QString stdOut() const;
    QString stdErr() const;

    QByteArray rawStdOut() const;

    QString exitMessage();

    QString toStandaloneCommandLine() const;

protected:
    // TODO: remove these methods on QtcProcess de-virtualization
    virtual void emitStarted();
    virtual void emitFinished();
    virtual void emitErrorOccurred(QProcess::ProcessError error);

private:
    void setProcessInterface(ProcessInterface *interface);

    friend QTCREATOR_UTILS_EXPORT QDebug operator<<(QDebug str, const QtcProcess &r);

    friend class Internal::QtcProcessPrivate;
    Internal::QtcProcessPrivate *d = nullptr;

    friend tst_QtcProcess;
    void beginFeed();
    void feedStdOut(const QByteArray &data);
    void endFeed();
};

class DeviceProcessHooks
{
public:
    std::function<ProcessInterface *(const FilePath &)> processImplHook;
    // TODO: remove this hook
    std::function<void(QtcProcess &)> startProcessHook;
    std::function<Environment(const FilePath &)> systemEnvironmentForBinary;
};

} // namespace Utils