private static void FindNewcomers(string outputFileName, string[] gitLog, AliasFinder af)
{
ISet<string> existingDevelopers = new HashSet<string>(); // these are no newcomers
DateTime lastDate = DateTime.MinValue;
using (StreamWriter swOutputCSV = File.CreateText(outputFileName))
{
swOutputCSV.WriteLine("author;date");
foreach (string logLine in gitLog.Reverse()) // proceed chronologically
{
if (logLine.StartsWith("Date: "))
if (lastDate != DateTime.MinValue)
throw new InvalidDataException("Two dates without author in between!");
else
lastDate = DateTime.Parse(logLine.Substring("Date: ".Length));
if (logLine.StartsWith("Author: "))
{
if (lastDate == DateTime.MinValue)
throw new InvalidDataException("Author without date!");
else
foreach (string deanonymizedAuthor in af.DeanonymizeAuthor(logLine.Substring("Author: ".Length)))
if (existingDevelopers.Add(deanonymizedAuthor))
swOutputCSV.WriteLine(deanonymizedAuthor + ";" + lastDate.ToString("u"));
lastDate = DateTime.MinValue;
}
}
}
}
private static void CountContributors(string outputCsvFile, string[] gitLog, AliasFinder af)
{
File.WriteAllText(
outputCsvFile,
"author;commmits\r\n" + // a header for the CSV
string.Join("\r\n", // one row per author
gitLog
.Where(logLine => logLine.StartsWith("Author: ")) // find all authors
.SelectMany(logLine => af.DeanonymizeAuthor(logLine.Substring("Author: ".Length))) // consolidate aliases
.GroupBy(x => x) // count by author
.Select(group => group.Key + ";" + group.Count()) // bring to CSV format
)
);
}
private static void CountActiveContributors(string outputCsvFile, string[] gitLog, AliasFinder af)
{
ISet<string> devsOfTheMonth = new HashSet<string>();
DateTime currentMonth = DateTime.MinValue;
DateTime lastDate = DateTime.MinValue;
using (StreamWriter swOutputCSV = File.CreateText(outputCsvFile))
{
swOutputCSV.WriteLine("month;number of active contributors");
foreach (string logLine in gitLog.Reverse()) // proceed chronologically
{
if (logLine.StartsWith("Date: "))
if (lastDate != DateTime.MinValue)
throw new InvalidDataException("Two dates without author in between!");
else
{
lastDate = DateTime.Parse(logLine.Substring("Date: ".Length));
if (lastDate.Month != currentMonth.Month || lastDate.Year != currentMonth.Year)
{
swOutputCSV.WriteLine(currentMonth.ToString("yyyy-MM") + ";" + devsOfTheMonth.Count);
devsOfTheMonth.Clear();
currentMonth = lastDate;
}
}
if (logLine.StartsWith("Author: "))
{
if (lastDate == DateTime.MinValue)
throw new InvalidDataException("Author without date!");
else
foreach (string deanonymizedAuthor in af.DeanonymizeAuthor(logLine.Substring("Author: ".Length)))
devsOfTheMonth.Add(deanonymizedAuthor);
lastDate = DateTime.MinValue;
}
}
swOutputCSV.WriteLine(currentMonth.ToString("yyyy-MM") + ";" + devsOfTheMonth.Count);
}
}
static void Main(string[] args)
{
Operation currentOperation;
if (args.Length != 3 && args.Length != 4 ||
!Enum.TryParse<Operation>(args[0], true, out currentOperation) ||
!File.Exists(args[1]))
{
PrintUsage();
}
else
{
string gitLogFile = args[1];
string outputCsvFile = args[2];
string[] gitLog = File.ReadAllLines(gitLogFile);
AliasFinder af = new AliasFinder();
if (args.Length == 4)
{
string authorList = args[3];
if (!File.Exists(authorList))
{ // author list does not exist yet, will be created
IEnumerable<IEnumerable<string>> authorAliasList =
af.Consolidate(
gitLog
.Where(line => line.StartsWith("Author: "))
.Select(line => line.Substring("Author: ".Length))
.ToArray()
);
File.WriteAllLines(authorList,
authorAliasList
.Select(aliases => string.Join(";", aliases))
.OrderBy(s => s)
);
}
af.InitializeMappingFromAuthorList(File.ReadAllLines(authorList));
}
switch (currentOperation)
{
case Operation.FindNewcomers:
FindNewcomers(outputCsvFile, gitLog, af);
break;
case Operation.CountContributors:
CountContributors(outputCsvFile, gitLog, af);
break;
case Operation.CountActiveContributors:
CountActiveContributors(outputCsvFile, gitLog, af);
break;
default:
throw new NotImplementedException("Operation " + currentOperation + " is not yet implemented.");
}
}
}