[PATCH 2 of 2 v6] update: enable the issue4028 fix also for update

[Gábor Stefanik]

# HG changeset patch
# User Gábor Stefanik <gabor.stefanik at nng.com>
# Date 1472155346 -7200
#      Thu Aug 25 22:02:26 2016 +0200
# Node ID d8e245dfe7f1bba4c0b6324e26d43aaae82e3df4
# Parent  a887e7516d5b37c0b55202fa1ec9db6909a03ce0
update: enable the issue4028 fix also for update

v2: don't do unnecessary copy tracing for updates with clean working copy
v3: adjust tests for changes caused by v7 of the main patch

diff --git a/mercurial/merge.py b/mercurial/merge.py
--- a/mercurial/merge.py
+++ b/mercurial/merge.py
@@ -1514,15 +1514,16 @@
                     pas = [p1]
 
         # deprecated config: merge.followcopies
-        followcopies = False
+        followcopies = repo.ui.configbool('merge', 'followcopies', True)
         if overwrite:
             pas = [wc]
+            followcopies = False
         elif pas == [p2]: # backwards
-            pas = [wc.p1()]
-        elif not branchmerge and not wc.dirty(missing=True):
-            pass
-        elif pas[0] and repo.ui.configbool('merge', 'followcopies', True):
-            followcopies = True
+            pas = [p1]
+        elif not pas[0]:
+            followcopies = False
+        if not branchmerge and not wc.dirty(missing=True):
+            followcopies = False
 
         ### calculate phase
         actionbyfile, diverge, renamedelete = calculateupdates(
diff --git a/tests/test-merge-local.t b/tests/test-merge-local.t
--- a/tests/test-merge-local.t
+++ b/tests/test-merge-local.t
@@ -66,7 +66,7 @@
   merging zzz1_merge_ok
   merging zzz2_merge_bad
   warning: conflicts while merging zzz2_merge_bad! (edit, then use 'hg resolve --mark')
-  2 files updated, 1 files merged, 3 files removed, 1 files unresolved
+  2 files updated, 1 files merged, 2 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges
   [1]
 
@@ -104,7 +104,7 @@
   merging zzz1_merge_ok
   merging zzz2_merge_bad
   warning: conflicts while merging zzz2_merge_bad! (edit, then use 'hg resolve --mark')
-  2 files updated, 1 files merged, 3 files removed, 1 files unresolved
+  2 files updated, 1 files merged, 2 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges
   [1]
 
diff --git a/tests/test-mq-subrepo.t b/tests/test-mq-subrepo.t
--- a/tests/test-mq-subrepo.t
+++ b/tests/test-mq-subrepo.t
@@ -304,6 +304,7 @@
   record this change to '.hgsub'? [Ynesfdaq?] y
   
   warning: subrepo spec file '.hgsub' not found
+  warning: subrepo spec file '.hgsub' not found
   abort: uncommitted changes in subrepository 'sub'
   [255]
   % update substate when adding .hgsub w/clean updated subrepo
@@ -319,6 +320,7 @@
   record this change to '.hgsub'? [Ynesfdaq?] y
   
   warning: subrepo spec file '.hgsub' not found
+  warning: subrepo spec file '.hgsub' not found
   path sub
    source   sub
    revision b2fdb12cd82b021c3b7053d67802e77b6eeaee31
diff --git a/tests/test-up-local-change.t b/tests/test-up-local-change.t
--- a/tests/test-up-local-change.t
+++ b/tests/test-up-local-change.t
@@ -67,13 +67,18 @@
   summary:     2
   
   $ hg --debug up 0
+  starting 4 threads for background file closing (?)
+    searching for copies back to rev 0
+    computing unmatched files in rotated DAG
+    computing unmatched files in unrotated DAG
+    unmatched files in local:
+     b
   resolving manifests
    branchmerge: False, force: False, partial: False
    ancestor: 1e71731e6fbb, local: 1e71731e6fbb+, remote: c19d34741b0a
    preserving a for resolve of a
    b: other deleted -> r
   removing b
-  starting 4 threads for background file closing (?)
    a: versions differ -> m (premerge)
   picked tool 'true' for a (binary False symlink False changedelete False)
   merging a