fileutils.cpp 16 KB
Newer Older
1 2 3 4
/**************************************************************************
**
** This file is part of Qt Creator
**
hjk's avatar
hjk committed
5
** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
6
**
Eike Ziller's avatar
Eike Ziller committed
7
** Contact: http://www.qt-project.org/
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**************************************************************************/

#include "fileutils.h"
#include "savefile.h"

34
#include "hostosinfo.h"
35 36
#include "qtcassert.h"

37
#include <QDir>
38
#include <QDebug>
39 40 41 42 43 44
#include <QFileInfo>
#include <QTemporaryFile>
#include <QDateTime>
#include <QDataStream>
#include <QTextStream>
#include <QMessageBox>
45 46 47

namespace Utils {

48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
/*! \class Utils::FileUtils

  \brief File- and directory-related convenience functions.

  File- and directory-related convenience functions.
*/

/*!
  Removes the directory \a filePath and its subdirectories recursively.

  \note The \a error parameter is optional.

  \return Whether the operation succeeded.
*/
bool FileUtils::removeRecursively(const QString &filePath, QString *error)
{
    QFileInfo fileInfo(filePath);
65
    if (!fileInfo.exists() && !fileInfo.isSymLink())
66 67 68 69
        return true;
    QFile::setPermissions(filePath, fileInfo.permissions() | QFile::WriteUser);
    if (fileInfo.isDir()) {
        QDir dir(filePath);
70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85
        dir = dir.canonicalPath();
        if (dir.isRoot()) {
            if (error) {
                *error = QCoreApplication::translate("Utils::FileUtils",
                    "Refusing to remove root directory.");
            }
            return false;
        }
        if (dir.path() == QDir::home().canonicalPath()) {
            if (error) {
                *error = QCoreApplication::translate("Utils::FileUtils",
                    "Refusing to remove your home directory.");
            }
            return false;
        }

86 87 88 89 90 91
        QStringList fileNames = dir.entryList(QDir::Files | QDir::Hidden
                                              | QDir::System | QDir::Dirs | QDir::NoDotAndDotDot);
        foreach (const QString &fileName, fileNames) {
            if (!removeRecursively(filePath + QLatin1Char('/') + fileName, error))
                return false;
        }
92
        if (!QDir::root().rmdir(dir.path())) {
93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110
            if (error) {
                *error = QCoreApplication::translate("Utils::FileUtils", "Failed to remove directory '%1'.")
                        .arg(QDir::toNativeSeparators(filePath));
            }
            return false;
        }
    } else {
        if (!QFile::remove(filePath)) {
            if (error) {
                *error = QCoreApplication::translate("Utils::FileUtils", "Failed to remove file '%1'.")
                        .arg(QDir::toNativeSeparators(filePath));
            }
            return false;
        }
    }
    return true;
}

111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
/*!
  Copies the directory specified by \a srcFilePath recursively to \a tgtFilePath. \a tgtFilePath will contain
  the target directory, which will be created. Example usage:

  \code
    QString error;
    book ok = Utils::FileUtils::copyRecursively("/foo/bar", "/foo/baz", &error);
    if (!ok)
      qDebug() << error;
  \endcode

  This will copy the contents of /foo/bar into to the baz directory under /foo, which will be created in the process.

  \note The \a error parameter is optional.

  \return Whether the operation succeeded.
*/
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164
bool FileUtils::copyRecursively(const QString &srcFilePath,
                     const QString &tgtFilePath, QString *error)
{
    QFileInfo srcFileInfo(srcFilePath);
    if (srcFileInfo.isDir()) {
        QDir targetDir(tgtFilePath);
        targetDir.cdUp();
        if (!targetDir.mkdir(QFileInfo(tgtFilePath).fileName())) {
            if (error) {
                *error = QCoreApplication::translate("Utils::FileUtils", "Failed to create directory '%1'.")
                        .arg(QDir::toNativeSeparators(tgtFilePath));
                return false;
            }
        }
        QDir sourceDir(srcFilePath);
        QStringList fileNames = sourceDir.entryList(QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot | QDir::Hidden | QDir::System);
        foreach (const QString &fileName, fileNames) {
            const QString newSrcFilePath
                    = srcFilePath + QLatin1Char('/') + fileName;
            const QString newTgtFilePath
                    = tgtFilePath + QLatin1Char('/') + fileName;
            if (!copyRecursively(newSrcFilePath, newTgtFilePath, error))
                return false;
        }
    } else {
        if (!QFile::copy(srcFilePath, tgtFilePath)) {
            if (error) {
                *error = QCoreApplication::translate("Utils::FileUtils", "Could not copy file '%1' to '%2'.")
                        .arg(QDir::toNativeSeparators(srcFilePath),
                             QDir::toNativeSeparators(tgtFilePath));
            }
            return false;
        }
    }
    return true;
}

165 166 167 168 169 170 171
/*!
  If \a filePath is a directory, the function will recursively check all files and return
  true if one of them is newer than \a timeStamp. If \a filePath is a single file, true will
  be returned if the file is newer than \timeStamp.

  \return Whether at least one file in \a filePath has a newer date than \a timeStamp.
*/
172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190
bool FileUtils::isFileNewerThan(const QString &filePath,
    const QDateTime &timeStamp)
{
    QFileInfo fileInfo(filePath);
    if (!fileInfo.exists() || fileInfo.lastModified() >= timeStamp)
        return true;
    if (fileInfo.isDir()) {
        const QStringList dirContents = QDir(filePath)
            .entryList(QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot);
        foreach (const QString &curFileName, dirContents) {
            const QString curFilePath
                = filePath + QLatin1Char('/') + curFileName;
            if (isFileNewerThan(curFilePath, timeStamp))
                return true;
        }
    }
    return false;
}

191 192 193 194 195 196 197 198 199
/*!
  Recursively resolve possibly present symlinks in \a filePath.
  Unlike QFileInfo::canonicalFilePath(), this function will still return the expected target file
  even if the symlink is dangling.

  \note Maximum recursion depth == 16.

  return Symlink target file path.
*/
200 201 202 203 204 205 206 207 208 209
QString FileUtils::resolveSymlinks(const QString &path)
{
    QFileInfo f(path);
    int links = 16;
    while (links-- && f.isSymLink())
        f.setFile(f.symLinkTarget());
    if (links <= 0)
        return QString();
    return f.filePath();
}
210

211 212
QByteArray FileReader::fetchQrc(const QString &fileName)
{
213
    QTC_ASSERT(fileName.startsWith(QLatin1Char(':')), return QByteArray());
214 215
    QFile file(fileName);
    bool ok = file.open(QIODevice::ReadOnly);
216
    QTC_ASSERT(ok, qWarning() << fileName << "not there!"; return QByteArray());
217 218 219 220 221
    return file.readAll();
}

bool FileReader::fetch(const QString &fileName, QIODevice::OpenMode mode)
{
222
    QTC_ASSERT(!(mode & ~(QIODevice::ReadOnly | QIODevice::Text)), return false);
223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332

    QFile file(fileName);
    if (!file.open(QIODevice::ReadOnly | mode)) {
        m_errorString = tr("Cannot open %1 for reading: %2").arg(
                QDir::toNativeSeparators(fileName), file.errorString());
        return false;
    }
    m_data = file.readAll();
    if (file.error() != QFile::NoError) {
        m_errorString = tr("Cannot read %1: %2").arg(
                QDir::toNativeSeparators(fileName), file.errorString());
        return false;
    }
    return true;
}

bool FileReader::fetch(const QString &fileName, QIODevice::OpenMode mode, QString *errorString)
{
    if (fetch(fileName, mode))
        return true;
    if (errorString)
        *errorString = m_errorString;
    return false;
}

bool FileReader::fetch(const QString &fileName, QIODevice::OpenMode mode, QWidget *parent)
{
    if (fetch(fileName, mode))
        return true;
    if (parent)
        QMessageBox::critical(parent, tr("File Error"), m_errorString);
    return false;
}


FileSaverBase::FileSaverBase()
    : m_hasError(false)
{
}

FileSaverBase::~FileSaverBase()
{
    delete m_file;
}

bool FileSaverBase::finalize()
{
    m_file->close();
    setResult(m_file->error() == QFile::NoError);
    // We delete the object, so it is really closed even if it is a QTemporaryFile.
    delete m_file;
    m_file = 0;
    return !m_hasError;
}

bool FileSaverBase::finalize(QString *errStr)
{
    if (finalize())
        return true;
    if (errStr)
        *errStr = errorString();
    return false;
}

bool FileSaverBase::finalize(QWidget *parent)
{
    if (finalize())
        return true;
    QMessageBox::critical(parent, tr("File Error"), errorString());
    return false;
}

bool FileSaverBase::write(const char *data, int len)
{
    if (m_hasError)
        return false;
    return setResult(m_file->write(data, len) == len);
}

bool FileSaverBase::write(const QByteArray &bytes)
{
    if (m_hasError)
        return false;
    return setResult(m_file->write(bytes) == bytes.count());
}

bool FileSaverBase::setResult(bool ok)
{
    if (!ok && !m_hasError) {
        m_errorString = tr("Cannot write file %1. Disk full?").arg(
                QDir::toNativeSeparators(m_fileName));
        m_hasError = true;
    }
    return ok;
}

bool FileSaverBase::setResult(QTextStream *stream)
{
#if QT_VERSION >= QT_VERSION_CHECK(4, 8, 0)
    stream->flush();
    return setResult(stream->status() == QTextStream::Ok);
#else
    Q_UNUSED(stream)
    return true;
#endif
}

bool FileSaverBase::setResult(QDataStream *stream)
{
#if QT_VERSION >= QT_VERSION_CHECK(4, 8, 0)
333
    return setResult(stream->status() == QDataStream::Ok);
334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408
#else
    Q_UNUSED(stream)
    return true;
#endif
}

bool FileSaverBase::setResult(QXmlStreamWriter *stream)
{
#if QT_VERSION >= QT_VERSION_CHECK(4, 8, 0)
    return setResult(!stream->hasError());
#else
    Q_UNUSED(stream)
    return true;
#endif
}


FileSaver::FileSaver(const QString &filename, QIODevice::OpenMode mode)
{
    m_fileName = filename;
    if (mode & (QIODevice::ReadOnly | QIODevice::Append)) {
        m_file = new QFile(filename);
        m_isSafe = false;
    } else {
        m_file = new SaveFile(filename);
        m_isSafe = true;
    }
    if (!m_file->open(QIODevice::WriteOnly | mode)) {
        QString err = QFile::exists(filename) ?
                tr("Cannot overwrite file %1: %2") : tr("Cannot create file %1: %2");
        m_errorString = err.arg(QDir::toNativeSeparators(filename), m_file->errorString());
        m_hasError = true;
    }
}

bool FileSaver::finalize()
{
    if (!m_isSafe)
        return FileSaverBase::finalize();

    SaveFile *sf = static_cast<SaveFile *>(m_file);
    if (m_hasError)
        sf->rollback();
    else
        setResult(sf->commit());
    delete sf;
    m_file = 0;
    return !m_hasError;
}

TempFileSaver::TempFileSaver(const QString &templ)
    : m_autoRemove(true)
{
    QTemporaryFile *tempFile = new QTemporaryFile();
    if (!templ.isEmpty())
        tempFile->setFileTemplate(templ);
    tempFile->setAutoRemove(false);
    if (!tempFile->open()) {
        m_errorString = tr("Cannot create temporary file in %1: %2").arg(
                QDir::toNativeSeparators(QFileInfo(tempFile->fileTemplate()).absolutePath()),
                tempFile->errorString());
        m_hasError = true;
    }
    m_file = tempFile;
    m_fileName = tempFile->fileName();
}

TempFileSaver::~TempFileSaver()
{
    delete m_file;
    m_file = 0;
    if (m_autoRemove)
        QFile::remove(m_fileName);
}

409 410 411 412 413 414 415
/*! \class Utils::FileName

    \brief A light-weight convenience class for filenames

    On windows filenames are compared case insensitively.
*/

Daniel Teske's avatar
Daniel Teske committed
416 417 418 419 420 421
FileName::FileName()
    : QString()
{

}

422
/// Constructs a FileName from \a info
Daniel Teske's avatar
Daniel Teske committed
423 424 425 426 427
FileName::FileName(const QFileInfo &info)
    : QString(info.absoluteFilePath())
{
}

428 429 430 431 432 433 434
/// \returns a QFileInfo
QFileInfo FileName::toFileInfo() const
{
    return QFileInfo(*this);
}

/// \returns a QString for passing on to QString based APIs
Daniel Teske's avatar
Daniel Teske committed
435 436 437 438 439
QString FileName::toString() const
{
    return QString(*this);
}

440 441 442 443 444 445 446
/// \returns a QString to display to the user
/// Converts the separators to the native format
QString FileName::toUserOutput() const
{
    return QDir::toNativeSeparators(toString());
}

447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468
/// Find the parent directory of a given directory.

/// Returns an empty FileName if the current dirctory is already
/// a root level directory.

/// \returns \a FileName with the last segment removed.
FileName FileName::parentDir() const
{
    const QString basePath = toString();
    if (basePath.isEmpty())
        return FileName();

    const QDir base(basePath);
    if (base.isRoot())
        return FileName();

    const QString path = basePath + QLatin1String("/..");
    const QString parent = QDir::cleanPath(path);

    return FileName::fromString(parent);
}

469 470
/// Constructs a FileName from \a fileName
/// \a fileName is not checked for validity.
Daniel Teske's avatar
Daniel Teske committed
471 472 473 474 475
FileName FileName::fromString(const QString &filename)
{
    return FileName(filename);
}

476 477 478 479 480 481 482 483
/// Constructs a FileName from \a fileName
/// \a fileName is only passed through QDir::cleanPath
/// and QDir::fromNativeSeparators
FileName FileName::fromUserInput(const QString &filename)
{
    return FileName(QDir::cleanPath(QDir::fromNativeSeparators(filename)));
}

Daniel Teske's avatar
Daniel Teske committed
484 485 486 487 488
FileName::FileName(const QString &string)
    : QString(string)
{

}
489

Daniel Teske's avatar
Daniel Teske committed
490 491
bool FileName::operator==(const FileName &other) const
{
492
    return QString::compare(*this, other, HostOsInfo::fileNameCaseSensitivity()) == 0;
Daniel Teske's avatar
Daniel Teske committed
493 494
}

495 496 497 498 499
bool FileName::operator!=(const FileName &other) const
{
    return !(*this == other);
}

Daniel Teske's avatar
Daniel Teske committed
500 501
bool FileName::operator<(const FileName &other) const
{
502
    return QString::compare(*this, other, HostOsInfo::fileNameCaseSensitivity()) < 0;
Daniel Teske's avatar
Daniel Teske committed
503 504 505 506
}

bool FileName::operator<=(const FileName &other) const
{
507
    return QString::compare(*this, other, HostOsInfo::fileNameCaseSensitivity()) <= 0;
Daniel Teske's avatar
Daniel Teske committed
508 509 510 511 512 513 514 515 516 517 518 519
}

bool FileName::operator>(const FileName &other) const
{
    return other < *this;
}

bool FileName::operator>=(const FileName &other) const
{
    return other <= *this;
}

520 521
/// \returns whether FileName is a child of \a s
bool FileName::isChildOf(const FileName &s) const
Daniel Teske's avatar
Daniel Teske committed
522
{
523
    if (!QString::startsWith(s, HostOsInfo::fileNameCaseSensitivity()))
524 525 526
        return false;
    if (size() <= s.size())
        return false;
527
    return at(s.size()) == QLatin1Char('/');
Daniel Teske's avatar
Daniel Teske committed
528 529
}

530 531 532 533 534 535
/// \overload
bool FileName::isChildOf(const QDir &dir) const
{
    return isChildOf(Utils::FileName::fromString(dir.absolutePath()));
}

536
/// \returns whether FileName endsWith \a s
Daniel Teske's avatar
Daniel Teske committed
537 538
bool FileName::endsWith(const QString &s) const
{
539
    return QString::endsWith(s, HostOsInfo::fileNameCaseSensitivity());
Daniel Teske's avatar
Daniel Teske committed
540 541
}

542 543 544 545
/// \returns the relativeChildPath of FileName to parent if FileName is a child of parent
/// \note returns a empty FileName if FileName is not a child of parent
/// That is, this never returns a path starting with "../"
FileName FileName::relativeChildPath(const FileName &parent) const
Daniel Teske's avatar
Daniel Teske committed
546
{
547 548 549
    if (!isChildOf(parent))
        return Utils::FileName();
    return FileName(QString::mid(parent.size() + 1, -1));
Daniel Teske's avatar
Daniel Teske committed
550 551
}

552
/// Appends \a s, ensuring a / between the parts
553
FileName &FileName::appendPath(const QString &s)
Daniel Teske's avatar
Daniel Teske committed
554
{
555
    if (!isEmpty() && !QString::endsWith(QLatin1Char('/')))
556 557
        append(QLatin1Char('/'));
    append(s);
558 559 560 561 562 563 564 565 566 567 568 569 570
    return *this;
}

FileName &FileName::append(const QString &str)
{
    QString::append(str);
    return *this;
}

FileName &FileName::append(QChar str)
{
    QString::append(str);
    return *this;
Daniel Teske's avatar
Daniel Teske committed
571 572
}

573
} // namespace Utils
Daniel Teske's avatar
Daniel Teske committed
574

575
QT_BEGIN_NAMESPACE
Daniel Teske's avatar
Daniel Teske committed
576 577
uint qHash(const Utils::FileName &a)
{
578 579
    if (Utils::HostOsInfo::isWindowsHost())
        return qHash(a.toString().toUpper());
Daniel Teske's avatar
Daniel Teske committed
580 581
    return qHash(a.toString());
}
582
QT_END_NAMESPACE