wireproto: port keep command to wire protocol v2

This is pretty straightforward.

Differential Revision: https://phab.mercurial-scm.org/D3180

tests/test-wireproto-command-known.t

@@ -0,0 +1,121 b''
+  $ . $TESTDIR/wireprotohelpers.sh
+
+  $ hg init server
+  $ enablehttpv2 server
+  $ cd server
+  $ hg debugdrawdag << EOF
+  > C D
+  > |/
+  > B
+  > |
+  > A
+  > EOF
+
+  $ hg log -T '{rev}:{node} {desc}\n'
+  3:be0ef73c17ade3fc89dc41701eb9fc3a91b58282 D
+  2:26805aba1e600a82e93661149f2313866a221a7b C
+  1:112478962961147124edd43549aedd1a335e44bf B
+  0:426bada5c67598ca65036d57d9e4b64b0c1ce7a0 A
+
+  $ hg serve -p $HGPORT -d --pid-file hg.pid -E error.log
+  $ cat hg.pid > $DAEMON_PIDS
+
+No arguments returns something reasonable
+
+  $ sendhttpv2peer << EOF
+  > command known
+  > EOF
+  creating http peer for wire protocol version 2
+  sending known command
+  s>     POST /api/exp-http-v2-0001/ro/known HTTP/1.1\r\n
+  s>     Accept-Encoding: identity\r\n
+  s>     accept: application/mercurial-exp-framing-0003\r\n
+  s>     content-type: application/mercurial-exp-framing-0003\r\n
+  s>     content-length: 20\r\n
+  s>     host: $LOCALIP:$HGPORT\r\n (glob)
+  s>     user-agent: Mercurial debugwireproto\r\n
+  s>     \r\n
+  s>     \x0c\x00\x00\x01\x00\x01\x01\x11\xa1DnameEknown
+  s> makefile('rb', None)
+  s>     HTTP/1.1 200 OK\r\n
+  s>     Server: testing stub value\r\n
+  s>     Date: $HTTP_DATE$\r\n
+  s>     Content-Type: application/mercurial-exp-framing-0003\r\n
+  s>     Transfer-Encoding: chunked\r\n
+  s>     \r\n
+  s>     9\r\n
+  s>     \x01\x00\x00\x01\x00\x02\x01F
+  s>     @
+  s>     \r\n
+  received frame(size=1; request=1; stream=2; streamflags=stream-begin; type=bytes-response; flags=eos|cbor)
+  s>     0\r\n
+  s>     \r\n
+  response: []
+
+Single known node works
+
+  $ sendhttpv2peer << EOF
+  > command known
+  >     nodes eval:[b'\x42\x6b\xad\xa5\xc6\x75\x98\xca\x65\x03\x6d\x57\xd9\xe4\xb6\x4b\x0c\x1c\xe7\xa0']
+  > EOF
+  creating http peer for wire protocol version 2
+  sending known command
+  s>     POST /api/exp-http-v2-0001/ro/known HTTP/1.1\r\n
+  s>     Accept-Encoding: identity\r\n
+  s>     accept: application/mercurial-exp-framing-0003\r\n
+  s>     content-type: application/mercurial-exp-framing-0003\r\n
+  s>     content-length: 54\r\n
+  s>     host: $LOCALIP:$HGPORT\r\n (glob)
+  s>     user-agent: Mercurial debugwireproto\r\n
+  s>     \r\n
+  s>     .\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa1Enodes\x81TBk\xad\xa5\xc6u\x98\xcae\x03mW\xd9\xe4\xb6K\x0c\x1c\xe7\xa0DnameEknown
+  s> makefile('rb', None)
+  s>     HTTP/1.1 200 OK\r\n
+  s>     Server: testing stub value\r\n
+  s>     Date: $HTTP_DATE$\r\n
+  s>     Content-Type: application/mercurial-exp-framing-0003\r\n
+  s>     Transfer-Encoding: chunked\r\n
+  s>     \r\n
+  s>     a\r\n
+  s>     \x02\x00\x00\x01\x00\x02\x01F
+  s>     A1
+  s>     \r\n
+  received frame(size=2; request=1; stream=2; streamflags=stream-begin; type=bytes-response; flags=eos|cbor)
+  s>     0\r\n
+  s>     \r\n
+  response: [b'1']
+
+Multiple nodes works
+
+  $ sendhttpv2peer << EOF
+  > command known
+  >     nodes eval:[b'\x42\x6b\xad\xa5\xc6\x75\x98\xca\x65\x03\x6d\x57\xd9\xe4\xb6\x4b\x0c\x1c\xe7\xa0', b'00000000000000000000', b'\x11\x24\x78\x96\x29\x61\x14\x71\x24\xed\xd4\x35\x49\xae\xdd\x1a\x33\x5e\x44\xbf']
+  > EOF
+  creating http peer for wire protocol version 2
+  sending known command
+  s>     POST /api/exp-http-v2-0001/ro/known HTTP/1.1\r\n
+  s>     Accept-Encoding: identity\r\n
+  s>     accept: application/mercurial-exp-framing-0003\r\n
+  s>     content-type: application/mercurial-exp-framing-0003\r\n
+  s>     content-length: 96\r\n
+  s>     host: $LOCALIP:$HGPORT\r\n (glob)
+  s>     user-agent: Mercurial debugwireproto\r\n
+  s>     \r\n
+  s>     X\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa1Enodes\x83TBk\xad\xa5\xc6u\x98\xcae\x03mW\xd9\xe4\xb6K\x0c\x1c\xe7\xa0T00000000000000000000T\x11$x\x96)a\x14q$\xed\xd45I\xae\xdd\x1a3^D\xbfDnameEknown
+  s> makefile('rb', None)
+  s>     HTTP/1.1 200 OK\r\n
+  s>     Server: testing stub value\r\n
+  s>     Date: $HTTP_DATE$\r\n
+  s>     Content-Type: application/mercurial-exp-framing-0003\r\n
+  s>     Transfer-Encoding: chunked\r\n
+  s>     \r\n
+  s>     c\r\n
+  s>     \x04\x00\x00\x01\x00\x02\x01F
+  s>     C101
+  s>     \r\n
+  received frame(size=4; request=1; stream=2; streamflags=stream-begin; type=bytes-response; flags=eos|cbor)
+  s>     0\r\n
+  s>     \r\n
+  response: [b'101']
+
+  $ cat error.log

mercurial/help/internals/wireprotocol.txt

@@ -1686,3 +1686,19 b' of DAG heads. The array can be empty if '
 changesets satisfied the request.
 
 TODO consider exposing phase of heads in response
+
+known
+-----
+
+Determine whether a series of changeset nodes is known to the server.
+
+The command accepts the following arguments:
+
+nodes
+   (array of bytestrings) List of changeset nodes whose presence to
+   query.
+
+The response is a bytestring where each byte contains a 0 or 1 for the
+corresponding requested node at the same index.
+
+TODO use a bit array for even more compact response

mercurial/wireproto.py

@@ -1041,7 +1041,8 b' def lookup(repo, proto, key):'
         success = 0
     return wireprototypes.bytesresponse('%d %s\n' % (success, r))
 
-@wireprotocommand('known', 'nodes *', permission='pull')
+@wireprotocommand('known', 'nodes *', permission='pull',
+                  transportpolicy=POLICY_V1_ONLY)
 def known(repo, proto, nodes, others):
     v = ''.join(b and '1' or '0' for b in repo.known(decodelist(nodes)))
     return wireprototypes.bytesresponse(v)
@@ -1215,3 +1216,10 b' def headsv2(repo, proto, publiconly=Fals'
         repo = repo.filtered('immutable')
 
     return wireprototypes.cborresponse(repo.heads())
+
+@wireprotocommand('known', 'nodes', permission='pull',
+                  transportpolicy=POLICY_V2_ONLY)
+def knownv2(repo, proto, nodes=None):
+    nodes = nodes or []
+    result = b''.join(b'1' if n else b'0' for n in repo.known(nodes))
+    return wireprototypes.cborresponse(result)