/// <summary>
/// Gets the weight of a package given its path.
/// </summary>
/// <param name="path">The path to the package.</param>
/// <returns>The weight of a package given its path or 0 if the package is missing.</returns>
internal static long GetWeightFromPath(string path)
{
if (File.Exists(path))
{
var weight = 0L;
using (var db = new Database(path, DatabaseOpenMode.ReadOnly))
{
// Get the total size of all files in the package.
if (null != db.Tables["File"])
{
weight += db.ExecuteIntegerQuery(PackageInfo.FileSizeQuery).Sum(i => i);
}
// TODO: Should the weight of the registry be taken into account?
// Storage isn't documented but it's probably a safe assumption value names and string data are double byte.
// Sum up reserve costs for local installs (source installs are uncommon).
if (null != db.Tables["ReserveCost"])
{
weight += db.ExecuteIntegerQuery(PackageInfo.ReserveCostSizeQuery).Sum(i => i);
}
}
// Use weight of package. May include just custom actions.
if (0 >= weight)
{
var file = new FileInfo(path);
weight = file.Length;
}
return weight;
}
return 0;
}