public virtual int GetRootChangesetForBranch(string tfsPathBranchToCreate, string tfsPathParentBranch = null)
{
Trace.WriteLine("TFS 2008 Compatible mode!");
int firstChangesetIdOfParentBranch = 1;
if (string.IsNullOrWhiteSpace(tfsPathParentBranch))
{
throw new GitTfsException("This version of TFS Server doesn't permit to use this command :(\nTry using option '--parent-branch'...");
}
var changesetIdsFirstChangesetInMainBranch = VersionControl.GetMergeCandidates(tfsPathParentBranch, tfsPathBranchToCreate, RecursionType.Full).Select(c => c.Changeset.ChangesetId).FirstOrDefault();
if (changesetIdsFirstChangesetInMainBranch == 0)
{
Trace.WriteLine("No changeset in main branch since branch done... (need only to find the last changeset in the main branch)");
return(VersionControl.QueryHistory(tfsPathParentBranch, VersionSpec.Latest, 0,
RecursionType.Full, null, new ChangesetVersionSpec(firstChangesetIdOfParentBranch), VersionSpec.Latest,
1, false, false).Cast <Changeset>().First().ChangesetId);
}
Trace.WriteLine("First changeset in the main branch after branching : " + changesetIdsFirstChangesetInMainBranch);
Trace.WriteLine("Try to find the previous changeset...");
int step = 100;
int upperBound = changesetIdsFirstChangesetInMainBranch - 1;
int lowerBound = Math.Max(upperBound - step, 1);
//for optimization, retrieve the lesser possible changesets... so 100 by 100
while (true)
{
Trace.WriteLine("Looking for the changeset between changeset id " + lowerBound + " and " + upperBound);
var firstBranchChangesetIds = VersionControl.QueryHistory(tfsPathParentBranch, VersionSpec.Latest, 0, RecursionType.Full,
null, new ChangesetVersionSpec(lowerBound), new ChangesetVersionSpec(upperBound), int.MaxValue, true,
false, false).Cast <Changeset>().Select(c => c.ChangesetId).ToList();
if (firstBranchChangesetIds.Count != 0)
{
return(firstBranchChangesetIds.First(cId => cId < changesetIdsFirstChangesetInMainBranch));
}
else
{
if (upperBound == 1)
{
throw new GitTfsException("An unexpected error occured when trying to find the root changeset.\nFailed to find a previous changeset to changeset n°" + changesetIdsFirstChangesetInMainBranch + " in the branch!!!");
}
upperBound = Math.Max(upperBound - step, 1);
lowerBound = Math.Max(upperBound - step, 1);
}
}
}