string GetCommitDate(GitRunner.BlamePorcelainEntry be)
{
int tzOffset = GetTZOffset(be.CommitterTZ, be);
int committerTimeUTC = (int)be.CommitterTime + tzOffset;
var unixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
DateTime dt = unixEpoch.AddSeconds(committerTimeUTC);
return(dt.ToString("R", DateTimeFormatInfo.InvariantInfo));
}
int GetTZOffset(string tz, GitRunner.BlamePorcelainEntry be)
{
if (String.IsNullOrEmpty(tz))
{
Log.DebugLine($"No timezone information from `git blame` for commit {be.Commit}");
return(0);
}
if (tz.Length != 5)
{
LogUnexpectedFormat();
return(0);
}
int tzSign;
switch (tz [0])
{
case '-':
tzSign = 1;
break;
case '+':
tzSign = -1;
break;
default:
LogUnexpectedFormat();
return(0);
}
if (!Int32.TryParse(tz.Substring(1, 2), out int hours))
{
LogUnexpectedFormat();
return(0);
}
if (!Int32.TryParse(tz.Substring(3, 2), out int minutes))
{
LogUnexpectedFormat();
return(0);
}
return(tzSign * ((hours * 3600) + (minutes * 60)));
void LogUnexpectedFormat()
{
Log.DebugLine($"Unexpected timezone format from `git blame` for commit {be.Commit}: {tz}");
}
}
