Add option -l/--limit to hg incoming and hg outgoing.

Add option -l/--limit to hg incoming and hg outgoing.

--- a/mercurial/commands.py	Fri Feb 29 01:51:23 2008 +0100
+++ b/mercurial/commands.py	Fri Feb 29 02:15:31 2008 +0100
@@ -1561,6 +1561,7 @@
 
     See pull for valid source format details.
     """
+    limit = cmdutil.loglimit(opts)
     source, revs, checkout = hg.parseurl(ui.expandpath(source), opts['rev'])
     cmdutil.setremoteconfig(ui, opts)
 
@@ -1599,10 +1600,14 @@
         if opts['newest_first']:
             o.reverse()
         displayer = cmdutil.show_changeset(ui, other, opts)
+        count = 0
         for n in o:
+            if count >= limit:
+                break
             parents = [p for p in other.changelog.parents(n) if p != nullid]
             if opts['no_merges'] and len(parents) == 2:
                 continue
+            count += 1
             displayer.show(changenode=n)
     finally:
         if hasattr(other, 'close'):
@@ -1869,6 +1874,7 @@
 
     See pull for valid destination format details.
     """
+    limit = cmdutil.loglimit(opts)
     dest, revs, checkout = hg.parseurl(
         ui.expandpath(dest or 'default-push', dest or 'default'), opts['rev'])
     cmdutil.setremoteconfig(ui, opts)
@@ -1885,10 +1891,14 @@
     if opts['newest_first']:
         o.reverse()
     displayer = cmdutil.show_changeset(ui, repo, opts)
+    count = 0
     for n in o:
+        if count >= limit:
+            break
         parents = [p for p in repo.changelog.parents(n) if p != nullid]
         if opts['no_merges'] and len(parents) == 2:
             continue
+        count += 1
         displayer.show(changenode=n)
 
 def parents(ui, repo, file_=None, **opts):
@@ -2975,6 +2985,7 @@
           ('n', 'newest-first', None, _('show newest record first')),
           ('', 'bundle', '', _('file to store the bundles into')),
           ('p', 'patch', None, _('show patch')),
+          ('l', 'limit', '', _('limit number of changes displayed')),
           ('r', 'rev', [], _('a specific revision up to which you would like to pull')),
           ('', 'template', '', _('display with template')),
          ] + remoteopts,
@@ -3032,6 +3043,7 @@
            _('run even when remote repository is unrelated')),
           ('p', 'patch', None, _('show patch')),
           ('', 'style', '', _('display using template map file')),
+          ('l', 'limit', '', _('limit number of changes displayed')),
           ('r', 'rev', [], _('a specific revision you would like to push')),
           ('n', 'newest-first', None, _('show newest record first')),
           ('', 'template', '', _('display with template')),

--- a/tests/test-incoming-outgoing	Fri Feb 29 01:51:23 2008 +0100
+++ b/tests/test-incoming-outgoing	Fri Feb 29 02:15:31 2008 +0100
@@ -19,6 +19,8 @@
 # local incoming
 hg -R new incoming test
 hg -R new incoming -r 4 test
+echo "% limit to 2 changesets"
+hg -R new incoming -l 2 test
 
 # test with --bundle
 http_proxy= hg -R new incoming --bundle test.hg http://localhost:$HGPORT/ | sed -e 's,:[0-9][0-9]*/,/,'
@@ -44,5 +46,7 @@
 hg verify
 cd ..
 hg -R test-dev outgoing test
+echo "% limit to 3 changesets"
+hg -R test-dev outgoing -l 3 test
 http_proxy= hg -R test-dev outgoing http://localhost:$HGPORT/ | sed -e 's,:[0-9][0-9]*/,/,'
 http_proxy= hg -R test-dev outgoing -r 11 http://localhost:$HGPORT/ | sed -e 's,:[0-9][0-9]*/,/,'

--- a/tests/test-incoming-outgoing.out	Fri Feb 29 01:51:23 2008 +0100
+++ b/tests/test-incoming-outgoing.out	Fri Feb 29 02:15:31 2008 +0100
@@ -151,6 +151,18 @@
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     4
 
+% limit to 2 changesets
+comparing with test
+changeset:   0:9cb21d99fe27
+user:        test
+date:        Mon Jan 12 13:46:40 1970 +0000
+summary:     0
+
+changeset:   1:d717f5dfad6a
+user:        test
+date:        Mon Jan 12 13:46:40 1970 +0000
+summary:     1
+
 comparing with http://localhost/
 changeset:   0:9cb21d99fe27
 user:        test
@@ -301,6 +313,24 @@
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     13
 
+% limit to 3 changesets
+comparing with test
+searching for changes
+changeset:   9:3741c3ad1096
+user:        test
+date:        Mon Jan 12 13:46:40 1970 +0000
+summary:     9
+
+changeset:   10:de4143c8d9a5
+user:        test
+date:        Mon Jan 12 13:46:40 1970 +0000
+summary:     10
+
+changeset:   11:0e1c188b9a7a
+user:        test
+date:        Mon Jan 12 13:46:40 1970 +0000
+summary:     11
+
 comparing with http://localhost/
 searching for changes
 changeset:   9:3741c3ad1096