From 8fce9909c0794e1f08020fa99edd63dc40f8e653 Mon Sep 17 00:00:00 2001
From: Yann Dirson <ydirson@altern.org>
Date: Sat, 5 May 2007 16:00:28 +0200
Subject: [PATCH] Copy patchlogs when cloning a stack or picking a patch.

This will allow to keep patch history accross those operations, and
see when they diverged when looking at the respective patchlogs.  With
more work, that will allow to locate the common ancestor when sync'ing
a patch across branches.

The work on "pick" can still be improved: currently the patchlog is
preserved on "pick patch[@branch][//top]", but we could make it work
for //top.old as well (or any rev in the patchlog when we'll be able
to name those).

Patchlog preservation in pick can only work when referencing a patch
by name.  When picking an arbitrary commit we could also improve
things by recording a "pick" operation instead of a "new".

Signed-off-by: Yann Dirson <ydirson@altern.org>
---
 stgit/commands/pick.py | 31 ++++++++++++++++++++++++++-----
 stgit/stack.py         | 22 +++++++++++++++-------
 2 files changed, 41 insertions(+), 12 deletions(-)

diff --git a/stgit/commands/pick.py b/stgit/commands/pick.py
index 4eb79a3..4ef9860 100644
--- a/stgit/commands/pick.py
+++ b/stgit/commands/pick.py
@@ -21,6 +21,7 @@ from optparse import OptionParser, make_option
 from stgit.commands.common import *
 from stgit.utils import *
 from stgit import stack, git
+from stgit.stack import Series
 
 
 help = 'import a patch from a different branch or a commit object'
@@ -118,11 +119,31 @@ def func(parser, options, args):
         print 'Importing commit %s...' % commit_id,
         sys.stdout.flush()
 
-        crt_series.new_patch(patchname, message = message, can_edit = False,
-                             unapplied = True, bottom = bottom, top = top,
-                             author_name = author_name,
-                             author_email = author_email,
-                             author_date = author_date)
+        newpatch = crt_series.new_patch(patchname, message = message, can_edit = False,
+                                        unapplied = True, bottom = bottom, top = top,
+                                        author_name = author_name,
+                                        author_email = author_email,
+                                        author_date = author_date)
+        # find a patchlog to fork from
+        (refpatchname, refbranchname, refpatchid) = parse_rev(commit_str)
+        if refpatchname and not refpatchid and \
+               (not refpatchid or refpatchid == 'top'):
+            # FIXME: should also support picking //top.old
+            if refbranchname:
+                # assume the refseries is OK, since we already resolved
+                # commit_str to a git_id
+                refseries = Series(refbranchname)
+            else:
+                refseries = crt_series
+            patch = refseries.get_patch(refpatchname)
+            if patch.get_log():
+                print"log was %s" % newpatch.get_log()
+                print "setting log to %s\n" %  patch.get_log()
+                newpatch.set_log(patch.get_log())
+                print"log is now %s" % newpatch.get_log()
+            else:
+                print "no log for %s\n" % patchname
+ 
         if not options.unapplied:
             modified = crt_series.push_patch(patchname)
         else:
diff --git a/stgit/stack.py b/stgit/stack.py
index 0cf7947..d0b54eb 100644
--- a/stgit/stack.py
+++ b/stgit/stack.py
@@ -23,6 +23,7 @@ import sys, os, re
 from stgit.utils import *
 from stgit import git, basedir, templates
 from stgit.config import config
+from shutil import copyfile
 
 
 # stack exception class
@@ -602,13 +603,18 @@ class Series(StgitObject):
             patches = applied = unapplied = []
         for p in patches:
             patch = self.get_patch(p)
-            new_series.new_patch(p, message = patch.get_description(),
-                                 can_edit = False, unapplied = True,
-                                 bottom = patch.get_bottom(),
-                                 top = patch.get_top(),
-                                 author_name = patch.get_authname(),
-                                 author_email = patch.get_authemail(),
-                                 author_date = patch.get_authdate())
+            newpatch = new_series.new_patch(p, message = patch.get_description(),
+                                            can_edit = False, unapplied = True,
+                                            bottom = patch.get_bottom(),
+                                            top = patch.get_top(),
+                                            author_name = patch.get_authname(),
+                                            author_email = patch.get_authemail(),
+                                            author_date = patch.get_authdate())
+            if patch.get_log():
+                print "setting log to %s" %  patch.get_log()
+                newpatch.set_log(patch.get_log())
+            else:
+                print "no log for %s" % patchname
 
         # fast forward the cloned series to self's top
         new_series.forward_patches(applied)
@@ -833,6 +839,8 @@ class Series(StgitObject):
             if refresh:
                 self.refresh_patch(cache_update = False, log = 'new')
 
+        return patch
+
     def delete_patch(self, name):
         """Deletes a patch
         """
-- 
2.11.0