From 6b760799882407774730b2d75bb5616e6ffd9804 Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20K=C3=A5gedal?= <davidk@lysator.liu.se>
Date: Wed, 19 Dec 2007 18:00:11 +0000
Subject: [PATCH] Remove the 'top' field
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
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The top is instead implicitly defined by the patch ref.

Signed-off-by: David KÃ¥gedal <davidk@lysator.liu.se>
Signed-off-by: Karl Hasselström <kha@treskal.com>
---
 stgit/stack.py | 26 +++++++++-----------------
 1 file changed, 9 insertions(+), 17 deletions(-)

diff --git a/stgit/stack.py b/stgit/stack.py
index 25de0f1..bdc07a9 100644
--- a/stgit/stack.py
+++ b/stgit/stack.py
@@ -162,7 +162,6 @@ class Patch(StgitObject):
 
     def create(self):
         os.mkdir(self._dir())
-        self.create_empty_field('top')
 
     def delete(self, keep_log = False):
         if os.path.isdir(self._dir()):
@@ -201,11 +200,6 @@ class Patch(StgitObject):
     def __update_log_ref(self, ref):
         git.set_ref(self.__log_ref, ref)
 
-    def update_top_ref(self):
-        top = self.get_top()
-        if top:
-            self.__update_top_ref(top)
-
     def get_old_bottom(self):
         return git.get_commit(self.get_old_top()).get_parent()
 
@@ -216,26 +210,18 @@ class Patch(StgitObject):
         return self._get_field('top.old')
 
     def get_top(self):
-        top = self._get_field('top')
-        try:
-            ref = git.rev_parse(self.__top_ref)
-        except:
-            ref = None
-        assert not ref or top == ref
-        return top
+        return git.rev_parse(self.__top_ref)
 
     def set_top(self, value, backup = False):
         if backup:
-            curr = self._get_field('top')
+            curr = self.get_top()
             self._set_field('top.old', curr)
-        self._set_field('top', value)
         self.__update_top_ref(value)
 
     def restore_old_boundaries(self):
         top = self._get_field('top.old')
 
         if top:
-            self._set_field('top', top)
             self.__update_top_ref(top)
             return True
         else:
@@ -456,7 +442,13 @@ class Series(PatchSet):
                 patch = patch.strip()
                 os.rename(os.path.join(branch_dir, patch),
                           os.path.join(patch_dir, patch))
-                Patch(patch, patch_dir, refs_base).update_top_ref()
+                topfield = os.path.join(patch_dir, patch, 'top')
+                if os.path.isfile(topfield):
+                    top = read_string(topfield, False)
+                else:
+                    top = None
+                if top:
+                    git.set_ref(refs_base + '/' + patch, top)
             set_format_version(1)
 
         # Update 1 -> 2.
-- 
2.11.0