From patchwork Wed Jun 21 20:45:14 2017
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: [7, of, 7, bm-refactor,
 V2] bookmarks: factor method _printer out of for loop in
 printbookmarks
From: Sean Farley <sean@farley.io>
X-Patchwork-Id: 21599
Message-Id: <621573af9a0644d6165b.1498077914@1.0.0.127.in-addr.arpa>
To: mercurial-devel@mercurial-scm.org
Cc: sean@farley.io
Date: Wed, 21 Jun 2017 13:45:14 -0700

# HG changeset patch
# User Sean Farley <sean@farley.io>
# Date 1498004300 25200
#      Tue Jun 20 17:18:20 2017 -0700
# Branch bm-refactor
# Node ID 621573af9a0644d6165b5ae6c242d069a21b704a
# Parent  6c3528df39f51c56c8bd671538fcf570c8171170
bookmarks: factor method _printer out of for loop in printbookmarks

This allows even further customization via extensions for printing
bookmarks. For example, in hg-git this would allow printing remote refs
by just modifying the 'bmarks' parameter instead of reimplementing the
old commands.bookmarks method.

Furthermore, there is another benefit: now multiple extensions can
chain their custom data to bookmark printing. Previously, an extension
could have conflicting bookmark output due to which loaded first and
overrode commands.bookmarks. Now they can all play nicely together.

diff --git a/mercurial/bookmarks.py b/mercurial/bookmarks.py
index 518b362..797e3c1 100644
--- a/mercurial/bookmarks.py
+++ b/mercurial/bookmarks.py
@@ -765,32 +765,43 @@ def addbookmarks(repo, tr, names, rev=No
         activate(repo, newact)
     elif cur != tgt and newact == repo._activebookmark:
         deactivate(repo)
     marks.recordchange(tr)
 
+def _printer(ui, repo, bmarks, **opts):
+    """private method to print bookmarks
+
+    Provides a way for extensions to control how bookmarks are printed (e.g.
+    prepend or postpend names)
+    """
+    fm = ui.formatter('bookmarks', opts)
+    hexfn = fm.hexfunc
+    if len(bmarks) == 0 and fm.isplain():
+        ui.status(_("no bookmarks set\n"))
+    for bmark, (n, prefix, label) in sorted(bmarks.iteritems()):
+        fm.startitem()
+        if not ui.quiet:
+            fm.plain(' %s ' % prefix, label=label)
+        fm.write('bookmark', '%s', bmark, label=label)
+        pad = " " * (25 - encoding.colwidth(bmark))
+        fm.condwrite(not ui.quiet, 'rev node', pad + ' %d:%s',
+                     repo.changelog.rev(n), hexfn(n), label=label)
+        fm.data(active=(activebookmarklabel in label))
+        fm.plain('\n')
+    fm.end()
+
 def printbookmarks(ui, repo, **opts):
     """print bookmarks to a formatter
 
     Provides a way for extensions to control how bookmarks are printed.
     """
-    fm = ui.formatter('bookmarks', opts)
-    hexfn = fm.hexfunc
     marks = repo._bookmarks
-    if len(marks) == 0 and fm.isplain():
-        ui.status(_("no bookmarks set\n"))
+    bmarks = {}
     for bmark, n in sorted(marks.iteritems()):
         active = repo._activebookmark
         if bmark == active:
             prefix, label = '*', activebookmarklabel
         else:
             prefix, label = ' ', ''
 
-        fm.startitem()
-        if not ui.quiet:
-            fm.plain(' %s ' % prefix, label=label)
-        fm.write('bookmark', '%s', bmark, label=label)
-        pad = " " * (25 - encoding.colwidth(bmark))
-        fm.condwrite(not ui.quiet, 'rev node', pad + ' %d:%s',
-                     repo.changelog.rev(n), hexfn(n), label=label)
-        fm.data(active=(bmark == active))
-        fm.plain('\n')
-    fm.end()
+        bmarks[bmark] = (n, prefix, label)
+    _printer(ui, repo, bmarks, **opts)