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Merge #11338: qt: Backup former GUI settings on -resetguisettings

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723aa1b qt: Backup former GUI settings on `-resetguisettings` (Wladimir J. van der Laan)

Pull request description:

  Writes the GUI settings to `guisettings.bak` in the data directory before wiping them. This can be used to retroactively troubleshoot issues (e.g. #11262) where `-resetguisettings` solves the problem.
  (as discussed in yesterday's IRC meeting)

Tree-SHA512: c64f5052d992eb02057ba285435f143c42d0cc456144a4c565e1c87be833737f9df750d0aee10810f85047c820d9b4f9f22fd94a6f09f4b28a9cf41b63a56586
This commit is contained in:
Wladimir J. van der Laan 2017-09-23 09:40:02 +02:00 committed by Alexander Block
parent 3b0df3422e
commit 6ab6809598
2 changed files with 23 additions and 0 deletions
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1
doc/files.md
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@ -20,3 +20,4 @@
* wallet.dat: personal wallet (BDB) with keys and transactions
* .cookie: session RPC authentication cookie (written at start when cookie authentication is used, deleted on shutdown)
* onion_private_key: cached Tor hidden service private key for `-listenonion`
* guisettings.ini.bak: backup of former GUI settings after `-resetguisettings` is used

22
src/qt/optionsmodel.cpp
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@ -195,10 +195,32 @@ void OptionsModel::Init(bool resetSettings)
language = settings.value("language").toString();
}
/** Helper function to copy contents from one QSettings to another.
* By using allKeys this also covers nested settings in a hierarchy.
*/
static void CopySettings(QSettings& dst, const QSettings& src)
{
for (const QString& key : src.allKeys()) {
dst.setValue(key, src.value(key));
}
}
/** Back up a QSettings to an ini-formatted file. */
static void BackupSettings(const fs::path& filename, const QSettings& src)
{
qWarning() << "Backing up GUI settings to" << GUIUtil::boostPathToQString(filename);
QSettings dst(GUIUtil::boostPathToQString(filename), QSettings::IniFormat);
dst.clear();
CopySettings(dst, src);
}
void OptionsModel::Reset()
{
QSettings settings;
// Backup old settings to chain-specific datadir for troubleshooting
BackupSettings(GetDataDir(true) / "guisettings.ini.bak", settings);
// Remove all entries from our QSettings object
settings.clear();
resetSettings = true; // Needed in dash.cpp during shotdown to also remove the window positions