From patchwork Thu May  7 21:27:33 2020
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Subject: D8502: cleanup: avoid extra node/ctx conversions in
 logcmdutil.diffordiffstat
From: phabricator <phabricator@mercurial-scm.org>
X-Patchwork-Id: 46287
Message-Id: <differential-rev-PHID-DREV-iqxrzz7e57pxunjzsagm-req@mercurial-scm.org>
To: Phabricator <phabricator@mercurial-scm.org>
Cc: mercurial-devel@mercurial-scm.org
Date: Thu, 7 May 2020 21:27:33 +0000

durin42 created this revision.
Herald added a reviewer: hg-reviewers.
Herald added a subscriber: mercurial-patches.

REVISION SUMMARY
  I'm about to write some code that wants to pass a memctx to
  diffordiffstat, but this feels like a meritorious cleanup anyway,
  since the first thing this method does is turn nodes into contexts,
  and most callers have a context handy.

REPOSITORY
  rHG Mercurial

BRANCH
  default

REVISION DETAIL
  https://phab.mercurial-scm.org/D8502

AFFECTED FILES
  hgext/mq.py
  mercurial/commands.py
  mercurial/logcmdutil.py
  mercurial/subrepo.py

CHANGE DETAILS




To: durin42, #hg-reviewers
Cc: mercurial-patches, mercurial-devel

diff --git a/mercurial/subrepo.py b/mercurial/subrepo.py
--- a/mercurial/subrepo.py
+++ b/mercurial/subrepo.py
@@ -617,8 +617,8 @@
                 ui,
                 self._repo,
                 diffopts,
-                node1,
-                node2,
+                self._repo[node1],
+                self._repo[node2],
                 match,
                 prefix=prefix,
                 listsubrepos=True,
diff --git a/mercurial/logcmdutil.py b/mercurial/logcmdutil.py
--- a/mercurial/logcmdutil.py
+++ b/mercurial/logcmdutil.py
@@ -72,8 +72,8 @@
     ui,
     repo,
     diffopts,
-    node1,
-    node2,
+    ctx1,
+    ctx2,
     match,
     changes=None,
     stat=False,
@@ -85,8 +85,6 @@
     hunksfilterfn=None,
 ):
     '''show diff or diffstat.'''
-    ctx1 = repo[node1]
-    ctx2 = repo[node2]
     if root:
         relroot = pathutil.canonpath(repo.root, repo.getcwd(), root)
     else:
@@ -173,6 +171,7 @@
             for chunk, label in chunks:
                 ui.write(chunk, label=label)
 
+    node2 = ctx2.node()
     for subpath, sub in scmutil.itersubrepos(ctx1, ctx2):
         tempnode2 = node2
         try:
@@ -208,15 +207,12 @@
         return None
 
     def showdiff(self, ui, ctx, diffopts, graphwidth=0, stat=False):
-        repo = ctx.repo()
-        node = ctx.node()
-        prev = ctx.p1().node()
         diffordiffstat(
             ui,
-            repo,
+            ctx.repo(),
             diffopts,
-            prev,
-            node,
+            ctx.p1(),
+            ctx,
             match=self._makefilematcher(ctx),
             stat=stat,
             graphwidth=graphwidth,
diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -2504,8 +2504,8 @@
         ui,
         repo,
         diffopts,
-        node1,
-        node2,
+        repo[node1],
+        repo[node2],
         m,
         stat=stat,
         listsubrepos=opts.get(b'subrepos'),
diff --git a/hgext/mq.py b/hgext/mq.py
--- a/hgext/mq.py
+++ b/hgext/mq.py
@@ -836,7 +836,15 @@
         stat = opts.get(b'stat')
         m = scmutil.match(repo[node1], files, opts)
         logcmdutil.diffordiffstat(
-            self.ui, repo, diffopts, node1, node2, m, changes, stat, fp
+            self.ui,
+            repo,
+            diffopts,
+            repo[node1],
+            repo[node2],
+            m,
+            changes,
+            stat,
+            fp,
         )
 
     def mergeone(self, repo, mergeq, head, patch, rev, diffopts):