private static int Main(string[] args)
{
string driveLetter;
if (args.Length < 1)
{
Console.WriteLine($"Usage: {Process.GetCurrentProcess().ProcessName} C:\n" +
"where C: is the letter of the drive you want to analyze.\n" +
"Requires a history of TreeScan Professional scans for this drive.");
return(1);
}
else
{
driveLetter = Path.GetFullPath(args[0]);
}
var deserializer = new XmlSerializer(typeof(ScanHistory));
ScanHistory scanHistory;
try {
using (var fileStream = new FileStream(HISTORY_FILE_PATH, FileMode.Open)) {
scanHistory = (ScanHistory)deserializer.Deserialize(fileStream);
}
} catch (FileNotFoundException) {
Console.WriteLine("Error: TreeSize Professional scan history file was not found while trying to load historical " +
"records of disk space usage.\n" +
"Ensure TreeSize Professional 5.2 or similar is installed, " +
"and than you have run at least two scans at different times.");
return(2);
}
IEnumerable <(double dateOA, long allocatedBytes)> matchingRows = (from scan in scanHistory.scans
orderby scan.dateOA
where Path.GetFullPath(scan.path) == driveLetter
select(scan.dateOA, allocatedBytes: long.Parse(scan.sizeData.allocatedBytes)))
.ToList();
switch (matchingRows.Count())
{
case 0:
Console.WriteLine(
$"Error: Historical scans were loaded successfully, but drive {driveLetter} has never been scanned.\n" +
$"There were {scanHistory.scans.Count - matchingRows.Count():N0} other, unrelated scan(s) in the TreeSize history.\n" +
"In order to analyze the disk space usage over time, you must scan the disk at least twice.");
return(3);
case 1:
Console.WriteLine(
$"Error: Historical scans were loaded successfully, but drive {driveLetter} has only been scanned once.\n" +
$"There were {scanHistory.scans.Count - matchingRows.Count():N0} other, unrelated scan(s) in the TreeSize history.\n" +
"In order to analyze the disk space usage over time, you must scan the disk at least twice.");
return(3);
default:
break;
}
Console.WriteLine($"Analyzing disk usage over time, based on {matchingRows.Count()} scans, the most recent of which was " +
$"on {DateTime.FromOADate(matchingRows.Last().dateOA):D}.");
double[] dateSequence = matchingRows.Select(x => x.dateOA).ToArray();
double[] allocatedByteSequence = matchingRows.Select(x => (double)x.allocatedBytes).ToArray();
SimpleLinearRegression simpleLinearRegression = SimpleLinearRegression.FromData(dateSequence, allocatedByteSequence);
double m = simpleLinearRegression.Slope;
double b = simpleLinearRegression.Intercept;
if (m < 0)
{
Console.WriteLine($"Disk space usage on {driveLetter} appears to be decreasing over time, " +
"and will therefore never run out.");
return(0);
}
long diskCapacity = new DriveInfo(driveLetter).TotalSize;
double capacityExhaustionDateExcel = (diskCapacity - b) / m;
DateTime capacityExhaustionDate = DateTime.FromOADate(capacityExhaustionDateExcel);
double daysRemaining = capacityExhaustionDate.Subtract(DateTime.Now).TotalDays;
Console.WriteLine($"Disk space on {driveLetter} will be exhausted in about {daysRemaining:N0} days, " +
$"around {capacityExhaustionDate:D}.");
return(0);
}