[PATCH 10/14] git p4: rearrange self.initialParent use

[Pete Wyckoff <pw@padd.com>]

This was set in a couple of places, both of which were very
far away from its use.  Move it a bit closer to importChanges(),
and add some comments.

Signed-off-by: Pete Wyckoff <pw@padd.com>
---
 git-p4.py | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/git-p4.py b/git-p4.py
index 5dcb527..9b07ddd 100755
--- a/git-p4.py
+++ b/git-p4.py
@@ -2689,6 +2689,7 @@ class P4Sync(Command, P4UserMap):
                     files = self.extractFilesFromCommit(description)
                     self.commit(description, files, self.branch,
                                 self.initialParent)
+                    # only needed once, to connect to the previous commit
                     self.initialParent = ""
             except IOError:
                 print self.gitError.read()
@@ -2754,7 +2755,6 @@ class P4Sync(Command, P4UserMap):
     def run(self, args):
         self.depotPaths = []
         self.changeRange = ""
-        self.initialParent = ""
         self.previousDepotPaths = []
         self.hasOrigin = False
 
@@ -2842,8 +2842,6 @@ class P4Sync(Command, P4UserMap):
             if p4Change > 0:
                 self.depotPaths = sorted(self.previousDepotPaths)
                 self.changeRange = "@%s,#head" % p4Change
-                if not self.detectBranches:
-                    self.initialParent = parseRevision(self.branch)
                 if not self.silent and not self.detectBranches:
                     print "Performing incremental import into %s git branch" % self.branch
 
@@ -2988,6 +2986,14 @@ class P4Sync(Command, P4UserMap):
 
                 self.updatedBranches = set()
 
+                if not self.detectBranches:
+                    if args:
+                        # start a new branch
+                        self.initialParent = ""
+                    else:
+                        # build on a previous revision
+                        self.initialParent = parseRevision(self.branch)
+
                 self.importChanges(changes)
 
                 if not self.silent:
-- 
1.8.1.350.gdbf6fd0