remotefilelog: rename capability for legacy ssh file fetching method

I think I want to delete this, but for now we'll just rename this so
it's easy to tell apart from other strings that have the same value.

Differential Revision: https://phab.mercurial-scm.org/D5126

hgext/remotefilelog/__init__.py

@@ -114,6 +114,7 b' from mercurial import ('
     util,
 )
 from . import (
+    constants,
     debugcommands,
     fileserverclient,
     remotefilectx,
@@ -282,7 +283,7 b' def cloneshallow(orig, ui, repo, *args, '
             # patterns.
             def stream_out_shallow(orig):
                 caps = remote.capabilities()
-                if shallowrepo.requirement in caps:
+                if constants.NETWORK_CAP_LEGACY_SSH_GETFILES in caps:
                     opts = {}
                     if repo.includepattern:
                         opts['includepattern'] = '\0'.join(repo.includepattern)

hgext/remotefilelog/constants.py

@@ -6,6 +6,8 b' from mercurial.i18n import _'
 
 REQUIREMENT = "remotefilelog"
 
+NETWORK_CAP_LEGACY_SSH_GETFILES = 'exp-remotefilelog-ssh-getfiles-1'
+
 FILENAMESTRUCT = '!H'
 FILENAMESIZE = struct.calcsize(FILENAMESTRUCT)
 

hgext/remotefilelog/fileserverclient.py

@@ -78,7 +78,8 b' def peersetup(ui, peer):'
         def _updatecallstreamopts(self, command, opts):
             if command != 'getbundle':
                 return
-            if 'remotefilelog' not in self.capabilities():
+            if (constants.NETWORK_CAP_LEGACY_SSH_GETFILES
+                not in self.capabilities()):
                 return
             if not util.safehasattr(self, '_localrepo'):
                 return
@@ -377,9 +378,8 b' class fileserverclient(object):'
                 try:
                     with self._connect() as conn:
                         remote = conn.peer
-                        # TODO: deduplicate this with the constant in
-                        #       shallowrepo
-                        if remote.capable("remotefilelog"):
+                        if remote.capable(
+                                constants.NETWORK_CAP_LEGACY_SSH_GETFILES):
                             if not isinstance(remote, _sshv1peer):
                                 raise error.Abort('remotefilelog requires ssh '
                                                   'servers')

hgext/remotefilelog/remotefilelogserver.py

@@ -29,6 +29,7 b' from mercurial import ('
     wireprotov1server,
 )
 from .  import (
+    constants,
     shallowrepo,
     shallowutil,
 )
@@ -197,7 +198,7 b' def onetimesetup(ui):'
             ui.configbool('remotefilelog', 'server'))):
             if isinstance(proto, _sshv1server):
                 # legacy getfiles method which only works over ssh
-                caps.append(shallowrepo.requirement)
+                caps.append(constants.NETWORK_CAP_LEGACY_SSH_GETFILES)
             caps.append('getflogheads')
             caps.append('getfile')
         return caps

tests/test-remotefilelog-pull-noshallow.t

@@ -36,13 +36,13 b' the server supports our custom getfiles '
 
   $ cd master
   $ echo 'hello' | hg -R . serve --stdio | grep capa | identifyrflcaps
+  exp-remotefilelog-ssh-getfiles-1
   getfile
   getflogheads
-  remotefilelog
   $ echo 'capabilities' | hg -R . serve --stdio | identifyrflcaps ; echo
+  exp-remotefilelog-ssh-getfiles-1
   getfile
   getflogheads
-  remotefilelog
   
 
 Pull to the child repository.  Use our custom setupremotefilelog extension

tests/test-remotefilelog-push-pull.t

@@ -23,13 +23,13 b' the server supports our custom getfiles '
 
   $ cd master
   $ echo 'hello' | hg -R . serve --stdio | grep capa | identifyrflcaps
+  exp-remotefilelog-ssh-getfiles-1
   getfile
   getflogheads
-  remotefilelog
   $ echo 'capabilities' | hg -R . serve --stdio | identifyrflcaps ; echo
+  exp-remotefilelog-ssh-getfiles-1
   getfile
   getflogheads
-  remotefilelog
   
 # pull to shallow from full