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Fix deletion method for old DB backups on schema update

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This commit is contained in:
Dan Stillman 2009-04-16 10:30:55 +00:00
parent d03d54b396
commit c9618b8a08
1 changed files with 23 additions and 10 deletions
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33
chrome/content/zotero/xpcom/schema.js
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@ -132,17 +132,30 @@ Zotero.Schema = new function(){
// Upgrade seems to have been a success -- delete any previous backups
var maxPrevious = dbVersion - 1;
var file = Zotero.getZoteroDirectory();
// directoryEntries.hasMoreElements() throws an error (possibly
// because of the temporary SQLite journal file?), so we just look
// for all versions
for (var i=maxPrevious; i>=28; i--) {
var fileName = 'zotero.sqlite.' + i + '.bak';
file.append(fileName);
if (file.exists()) {
Zotero.debug('Removing previous backup file ' + fileName);
file.remove(null);
var toDelete = [];
try {
var files = file.directoryEntries;
while (files.hasMoreElements()) {
var file = files.getNext();
file.QueryInterface(Components.interfaces.nsIFile);
if (file.isDirectory()) {
continue;
}
var matches = file.leafName.match(/zotero\.sqlite\.([0-9]{2,})\.bak/);
if (!matches) {
continue;
}
if (matches[1]>=28 && matches[1]<=maxPrevious) {
toDelete.push(file);
}
}
file = file.parent;
for each(var file in toDelete) {
Zotero.debug('Removing previous backup file ' + file.leafName);
file.remove(false);
}
}
catch (e) {
Zotero.debug(e);
}
}