file always ends with: \begin_inset Tabular. Users who work with tables a lot
may therefore wish to disable auto-save.
-To prevent dataloss, we have changed the way LyX saves files. Rather than
-over-write the original file immediately, LyX now saves the new file to a
-temporary name and then renames the new file to the original filename only
-after it has been written successfully.
-
+To prevent dataloss, we have changed the way LyX saves files if the user
+has not enabled backups. LyX now renames the existing file before
+attempting to save the new one (in effect, making a temporary backup).
+Then, if the save fails, the original file can be restored.
+
LyX is a document processor that encourages an approach to writing based
on the structure of your documents and not simply their appearance. It is
released under a Free and Open Source Software license.
// We don't need autosaves in the immediate future. (Asger)
resetAutosaveTimers();
+ // none of the backup activity that follows is necessary if the
+ // file does not exist
+ if (!fileName().exists())
+ return writeFile(fileName());
+
+ // this will hold the name of the location to which we backup
+ // the existing file, if we do that.
FileName backupName;
- bool madeBackup = false;
// make a backup if the file already exists
- if (lyxrc.make_backup && fileName().exists()) {
+ if (lyxrc.make_backup) {
backupName = FileName(absFileName() + '~');
if (!lyxrc.backupdir_path.empty()) {
string const mangledName =
subst(subst(backupName.absFileName(), '/', '!'), ':', '!');
backupName = FileName(addName(lyxrc.backupdir_path,
- mangledName));
- }
-
- // Except file is symlink do not copy because of #6587.
- // Hard links have bad luck.
- if (fileName().isSymLink())
- madeBackup = fileName().copyTo(backupName);
- else
- madeBackup = fileName().moveTo(backupName);
-
- if (!madeBackup) {
- Alert::error(_("Backup failure"),
- bformat(_("Cannot create backup file %1$s.\n"
- "Please check whether the directory exists and is writable."),
- from_utf8(backupName.absFileName())));
- //LYXERR(Debug::DEBUG, "Fs error: " << fe.what());
+ mangledName));
}
+ } else {
+ // we make a backup anyway, to avoid over-writing the original file
+ // before the new one has been saved.
+ //
+ // FIXME A more sophisticated approach is in master and should
+ // be moved into 2.1.x once it has been properly tested.
+ string const savepath = fileName().onlyPath().absFileName();
+ string const fname = fileName().onlyFileName();
+ string savename;
+ int fnum = 0;
+
+ // try to find a temporary filename to which we can backup the
+ // existing LyX file
+ do {
+ fnum += 1;
+ if (fnum > 1024) {
+ Alert::error(_("Write failure"),
+ bformat(_("Cannot find temporary filename for:\n %1$s.\n"
+ "Even %2$s exists!"),
+ from_utf8(fileName().absFileName()),
+ from_utf8(backupName.absFileName())));
+ return false;
+ }
+ savename = "lyxbak-" + convert<string>(fnum) + "-" + fname;
+ backupName.set(addName(savepath, savename));
+ } while (backupName.exists());
+ }
+
+ LYXERR(Debug::FILES, "Backup being made at " << backupName);
+ // We make the backup by moving the original file unless it is
+ // a symlink, in which case we copy it because of #6587.
+ // Hard links are broken: The new file we write will not be hard
+ // linked as the original file was. Sorry!
+ bool const madeBackup = fileName().isSymLink() ?
+ fileName().copyTo(backupName) :
+ fileName().moveTo(backupName);
+
+ if (!madeBackup) {
+ int const ret = Alert::prompt(_("Backup failure"),
+ bformat(_("Cannot create backup file:\n %1$s.\n"
+ "Do you want to try to save the file anyway?\n"
+ "This will over-write the original file."),
+ from_utf8(backupName.absFileName())),
+ 1, 1, _("&Overwrite"), _("&Cancel"));
+ if (ret != 0)
+ return false;
}
if (writeFile(d->filename)) {
markClean();
+ if (madeBackup && !lyxrc.make_backup)
+ backupName.removeFile();
return true;
- } else {
- // Saving failed, so backup is not backup
- if (madeBackup)
- backupName.moveTo(d->filename);
- return false;
}
+
+ // else saving failed, so backup is not backup
+ if (madeBackup) {
+ if (!backupName.moveTo(d->filename)) {
+ Alert::error(_("Write failure"),
+ bformat(_("Cannot restore original file to:\n %1$s.\n"
+ "But it can be found at:\n %2$s."),
+ from_utf8(fileName().absFileName()),
+ from_utf8(backupName.absFileName())));
+ }
+ }
+ return false;
}
* DOCUMENT INPUT/OUTPUT
-
- We now flush the output stream more frequently, as a temporary measure
to help us gather information about the crash mentioned above.
+- To prevent dataloss, we have changed the way LyX saves files if the user
+ has not enabled backups. LyX now renames the existing file before
+ attempting to save the new one (in effect, making a temporary backup).
+ Then, if the save fails, the original file can be restored.
+
* TEX2LYX IMPROVEMENTS
* LYX2LYX
-We have fixed several significant issues involving conversion of 2.0
- format into 2.1 format, and conversely. This mostly affects the new
- argument insets and, in particular, beamer documents. These are
- detailed below.
+We have fixed several significant issues involving conversion of 2.0 format into
+2.1 format, and conversely. This mostly affects the new argument insets and, in
+particular, beamer documents. These are detailed below.
- Fix conversion of beamer block titles ending with non-ERT insets to 2.1 format.