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Saving replaced the project file with nothing kept of what it was: one
bad save -- a fault in QElectroTech, a full disk, a wrong edit saved by
mistake -- and the last good version was gone. AutoCAD keeps a .bak on
every save, KiCad several backups.
Before a project is saved over, the file as it was is now copied to a
folder beside it, "<name>-backups", named by the time that version was
saved ("industrial 2026-10-16 08-30-12.qetz"); only the newest are kept,
5 by default (Settings > General > Projects, 0 for none). A copy is
never a move, so a save that fails leaves the file in place; a copy that
fails only warns, the save goes on. The same bytes as the newest version
kept are not kept twice.
The prompt on opening ("Create a backup copy?"), which writes one dated
copy beside the project and never removes any, is left as it is.
New tst_previousversions (newest kept, same bytes once, same second,
nothing for a new file or a count of 0, a failed copy said); it fails
with the oldest never removed. Checked with the program: two scripted
saves of a .qetz leave the original and the first save in
industrial-backups, the project holds the second. ctest 107/107.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
50 lines
2.0 KiB
C++
50 lines
2.0 KiB
C++
/*
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Copyright 2006-2026 The QElectroTech Team
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This file is part of QElectroTech.
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QElectroTech is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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QElectroTech is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with QElectroTech. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef PREVIOUSVERSIONS_H
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#define PREVIOUSVERSIONS_H
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#include <QString>
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#include <QStringList>
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/**
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@brief The PreviousVersions namespace
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The versions of a project file kept before it is saved over, as KiCad
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and AutoCAD keep theirs: a copy of the file as it was goes in a folder
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beside it, "<name>-backups", named by the time that version was saved
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("industrial 2026-10-16 08-30-12.qetz"), and only the newest are kept.
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The file is copied, never moved: a save that fails leaves it in place.
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*/
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namespace PreviousVersions
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{
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/// How many versions to keep (Settings > General > Projects); 0 keeps none
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int count();
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void setCount(int count);
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/// The folder the versions of @p file_path go in
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QString folder(const QString &file_path);
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/// The versions kept of @p file_path, newest first
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QStringList kept(const QString &file_path);
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/// Copy @p file_path, about to be saved over, among its versions and
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/// keep only the @p count newest. Nothing is copied when the file does
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/// not exist, when @p count is 0, or when the newest version kept
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/// holds the same bytes. @return false, with @p error, when the copy
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/// could not be made: the save goes on all the same.
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bool keep(const QString &file_path, int count, QString *error = nullptr);
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}
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#endif // PREVIOUSVERSIONS_H
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