server: allow customizing the default repo filter

hgweb has the (undocument) configuration option web.view that allows
restricting visible revisions to immutable. This is useful for serving
the same storage as publishing and non-publishing repo. Add the new
server.view option to serve the same purpose by changing the default
behavior of `getdispatchrepo`. Drop the hard-coded 'served' filter in the
batch handler of v1 of the wire proto, this is a left-over from the days
before `getdispatchrepo` existed.

Differential Revision: https://phab.mercurial-scm.org/D5946

tests/test-server-view.t

@@ -0,0 +1,38 b''
+  $ hg init test
+  $ cd test
+  $ hg debugbuilddag '+2'
+  $ hg phase --public 0
+
+  $ hg serve -p $HGPORT -d --pid-file=hg.pid -E errors.log
+  $ cat hg.pid >> $DAEMON_PIDS
+  $ cd ..
+  $ hg init test2
+  $ cd test2
+  $ hg incoming http://foo:xyzzy@localhost:$HGPORT/
+  comparing with http://foo:***@localhost:$HGPORT/
+  changeset:   0:1ea73414a91b
+  user:        debugbuilddag
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  summary:     r0
+  
+  changeset:   1:66f7d451a68b
+  tag:         tip
+  user:        debugbuilddag
+  date:        Thu Jan 01 00:00:01 1970 +0000
+  summary:     r1
+  
+  $ killdaemons.py
+
+  $ cd ../test
+  $ hg --config server.view=immutable serve -p $HGPORT -d --pid-file=hg.pid -E errors.log
+  $ cat hg.pid >> $DAEMON_PIDS
+  $ cd ../test2
+  $ hg incoming http://foo:xyzzy@localhost:$HGPORT/
+  comparing with http://foo:***@localhost:$HGPORT/
+  changeset:   0:1ea73414a91b
+  tag:         tip
+  user:        debugbuilddag
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  summary:     r0
+  
+  $ killdaemons.py

mercurial/configitems.py

@@ -1041,6 +1041,9 b" coreconfigitem('server', 'uncompressed',"
 coreconfigitem('server', 'uncompressedallowsecret',
     default=False,
 )
+coreconfigitem('server', 'view',
+    default='served',
+)
 coreconfigitem('server', 'validate',
     default=False,
 )

mercurial/help/config.txt

@@ -2028,6 +2028,12 b' Controls generic server settings.'
 
     See also ``server.zliblevel``.
 
+``view``
+    Repository filter used when exchanging revisions with the peer.
+
+    The default view (``served``) excludes secret and hidden changesets.
+    Another useful value is ``immutable`` (no draft, secret or hidden changesets).
+
 ``smtp``
 --------
 

mercurial/wireprotov1server.py

@@ -64,7 +64,8 b' def getdispatchrepo(repo, proto, command'
     extensions that need commands to operate on different repo views under
     specialized circumstances.
     """
-    return repo.filtered('served')
+    viewconfig = repo.ui.config('server', 'view')
+    return repo.filtered(viewconfig)
 
 def dispatch(repo, proto, command):
     repo = getdispatchrepo(repo, proto, command)
@@ -166,7 +167,6 b' def wireprotocommand(name, args=None, pe'
 @wireprotocommand('batch', 'cmds *', permission='pull')
 def batch(repo, proto, cmds, others):
     unescapearg = wireprototypes.unescapebatcharg
-    repo = repo.filtered("served")
     res = []
     for pair in cmds.split(';'):
         op, args = pair.split(' ', 1)

mercurial/wireprotov2server.py

@@ -342,7 +342,8 b' def _httpv2runcommand(ui, repo, req, res'
                                      action)
 
 def getdispatchrepo(repo, proto, command):
-    return repo.filtered('served')
+    viewconfig = repo.ui.config('server', 'view')
+    return repo.filtered(viewconfig)
 
 def dispatch(repo, proto, command, redirect):
     """Run a wire protocol command.

tests/test-wireproto.py

@@ -78,6 +78,9 b' class clientpeer(wireprotov1peer.wirepee'
         yield unmangle(f.value)
 
 class serverrepo(object):
+    def __init__(self, ui):
+        self.ui = ui
+
     def greet(self, name):
         return b"Hello, " + name
 
@@ -94,7 +97,7 b' def greet(repo, proto, name):'
 
 wireprotov1server.commands[b'greet'] = (greet, b'name')
 
-srv = serverrepo()
+srv = serverrepo(uimod.ui())
 clt = clientpeer(srv, uimod.ui())
 
 def printb(data, end=b'\n'):