D6931: context: clarify the various mode in the filesadded method

[marmoute (Pierre-Yves David)]

marmoute created this revision.
marmoute added reviewers: martinvonz, durin42.
Herald added a subscriber: mercurial-devel.
Herald added a reviewer: hg-reviewers.

REVISION SUMMARY
  The previous code was compact but a bit dense. The new proposed code deal with
  each mode separately, there are some duplicated lines, but the meaning of each
  mode stand out.
  
  One of the benefit it to make it simpler to add further mode in the future.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D6931

AFFECTED FILES
  mercurial/context.py

CHANGE DETAILS

diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -453,13 +453,20 @@
         modified.difference_update(self.filesadded())
         modified.difference_update(self.filesremoved())
         return sorted(modified)
+
     def filesadded(self):
         source = self._repo.ui.config('experimental', 'copies.read-from')
-        if (source == 'changeset-only' or
-            (source == 'compatibility' and
-             self._changeset.filesadded is not None)):
-            return self._changeset.filesadded or []
-        return scmutil.computechangesetfilesadded(self)
+        filesadded = self._changeset.filesadded
+        if source == 'changeset-only':
+            if filesadded is None:
+                filesadded = []
+        elif source == 'compatibility':
+            if filesadded is None:
+                filesadded = scmutil.computechangesetfilesadded(self)
+        else:
+            filesadded = scmutil.computechangesetfilesadded(self)
+        return filesadded
+
     def filesremoved(self):
         source = self._repo.ui.config('experimental', 'copies.read-from')
         if (source == 'changeset-only' or



To: marmoute, martinvonz, durin42, #hg-reviewers
Cc: mercurial-devel