private IEnumerable <MountPointInfo> FindMountPointsToScan(bool forceRebuild)
{
// If the user settings version is out of date, or
// we've been asked to rebuild everything then
// we need to scan everything
bool forceScanAll = !IsVersionCurrent || forceRebuild;
// load up the culture neutral cache
// and get the mount points for templates from the culture neutral cache
HashSet <TemplateInfo> allTemplates = new HashSet <TemplateInfo>(_userTemplateCache.GetTemplatesForLocale(null, _userSettings.Version));
// loop through the localized caches and get all the locale mount points
foreach (string locale in _userTemplateCache.AllLocalesWithCacheFiles)
{
allTemplates.UnionWith(_userTemplateCache.GetTemplatesForLocale(locale, _userSettings.Version));
}
var returnedPoints = new HashSet <Guid>();
foreach (TemplateInfo template in allTemplates)
{
if (returnedPoints.Contains(template.ConfigMountPointId))
{
continue;
}
if (!_mountPoints.TryGetValue(template.ConfigMountPointId, out MountPointInfo mountPoint))
{
// TODO: This should never happen - throw an error?
continue;
}
//try to demand mount point: if the mount point is not available, the method returns false
//if the mount point is not available, we skip it so it doesn't cause exception when scanning it
if (!_mountPointManager.TryDemandMountPoint(mountPoint, out IMountPoint mp))
{
continue;
}
_mountPointManager.ReleaseMountPoint(mp);
if (forceScanAll)
{
returnedPoints.Add(template.ConfigMountPointId);
yield return(mountPoint);
continue;
}
// For MountPoints using FileSystemMountPointFactories
// we scan the file system to see if the template
// is more recent than our cached version
if (mountPoint.MountPointFactoryId != FileSystemMountPointFactory.FactoryId)
{
continue;
}
string pathToTemplateFile = Path.Combine(mountPoint.Place, template.ConfigPlace.TrimStart('/'));
DateTime?timestampOnDisk = null;
if (_environmentSettings.Host.FileSystem is IFileLastWriteTimeSource timeSource)
{
timestampOnDisk = timeSource.GetLastWriteTimeUtc(pathToTemplateFile);
}
if (!template.ConfigTimestampUtc.HasValue ||
(timestampOnDisk.HasValue && template.ConfigTimestampUtc.Value < timestampOnDisk))
{
// Template on disk is more recent
returnedPoints.Add(template.ConfigMountPointId);
yield return(mountPoint);
}
}
}
public void ReleaseMountPoint(IMountPoint mountPoint)
{
_mountPointManager.ReleaseMountPoint(mountPoint);
}