phabricator: use .arcconfig for `phabricator.url` if not set locally

This setting is also per repo; see the previous commit for details.

The existing `conduit_uri` setting is the previous name of `phabricator.uri`[1]
and while it could easily be queried before the latter for compatibility, the
config in this repo has '/api' appended. That's already done in `callconduit()`,
which would clearly end up giving the wrong result. It looks like the path of
the URL is now ignored in user configs[2], so add the modern setting without it
to this repo's .arcconfig.

Sadly, we still need to have contributors configure `auth.hg.phabtoken` (and
therefore `auth.hg.prefix` to link it to `phabricator.url`) in order to submit
patches, but at least now it's localized to a single section.

[1] https://secure.phabricator.com/book/phabricator/article/arcanist_new_project/
[2] https://github.com/phacility/arcanist/blob/cc850163f30c4697e925df0d6212469679600a2c/scripts/arcanist.php#L271

Differential Revision: https://phab.mercurial-scm.org/D7935

.arcconfig

@@ -1,6 +1,7 b''
 {
     "conduit_uri": "https://phab.mercurial-scm.org/api",
+    "phabricator.uri": "https://phab.mercurial-scm.org/",
     "repository.callsign": "HG",
     "arc.land.onto.default": "@",
     "base": "hg:.^"
 }

hgext/phabricator.py

@@ -1,1792 +1,1797 b''
 # phabricator.py - simple Phabricator integration
 #
 # Copyright 2017 Facebook, Inc.
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 """simple Phabricator integration (EXPERIMENTAL)
 
 This extension provides a ``phabsend`` command which sends a stack of
 changesets to Phabricator, and a ``phabread`` command which prints a stack of
 revisions in a format suitable for :hg:`import`, and a ``phabupdate`` command
 to update statuses in batch.
 
 A "phabstatus" view for :hg:`show` is also provided; it displays status
 information of Phabricator differentials associated with unfinished
 changesets.
 
 By default, Phabricator requires ``Test Plan`` which might prevent some
 changeset from being sent. The requirement could be disabled by changing
 ``differential.require-test-plan-field`` config server side.
 
 Config::
 
     [phabricator]
     # Phabricator URL
     url = https://phab.example.com/
 
     # Repo callsign. If a repo has a URL https://$HOST/diffusion/FOO, then its
     # callsign is "FOO".
     callsign = FOO
 
     # curl command to use. If not set (default), use builtin HTTP library to
     # communicate. If set, use the specified curl command. This could be useful
     # if you need to specify advanced options that is not easily supported by
     # the internal library.
     curlcmd = curl --connect-timeout 2 --retry 3 --silent
 
     [auth]
     example.schemes = https
     example.prefix = phab.example.com
 
     # API token. Get it from https://$HOST/conduit/login/
     example.phabtoken = cli-xxxxxxxxxxxxxxxxxxxxxxxxxxxx
 """
 
 from __future__ import absolute_import
 
 import base64
 import contextlib
 import hashlib
 import itertools
 import json
 import mimetypes
 import operator
 import re
 
 from mercurial.node import bin, nullid
 from mercurial.i18n import _
 from mercurial.pycompat import getattr
 from mercurial.thirdparty import attr
 from mercurial import (
     cmdutil,
     context,
     encoding,
     error,
     exthelper,
     graphmod,
     httpconnection as httpconnectionmod,
     localrepo,
     logcmdutil,
     match,
     mdiff,
     obsutil,
     parser,
     patch,
     phases,
     pycompat,
     scmutil,
     smartset,
     tags,
     templatefilters,
     templateutil,
     url as urlmod,
     util,
 )
 from mercurial.utils import (
     procutil,
     stringutil,
 )
 from . import show
 
 
 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
 # be specifying the version(s) of Mercurial they are tested with, or
 # leave the attribute unspecified.
 testedwith = b'ships-with-hg-core'
 
 eh = exthelper.exthelper()
 
 cmdtable = eh.cmdtable
 command = eh.command
 configtable = eh.configtable
 templatekeyword = eh.templatekeyword
 uisetup = eh.finaluisetup
 
 # developer config: phabricator.batchsize
 eh.configitem(
     b'phabricator', b'batchsize', default=12,
 )
 eh.configitem(
     b'phabricator', b'callsign', default=None,
 )
 eh.configitem(
     b'phabricator', b'curlcmd', default=None,
 )
 # developer config: phabricator.repophid
 eh.configitem(
     b'phabricator', b'repophid', default=None,
 )
 eh.configitem(
     b'phabricator', b'url', default=None,
 )
 eh.configitem(
     b'phabsend', b'confirm', default=False,
 )
 
 colortable = {
     b'phabricator.action.created': b'green',
     b'phabricator.action.skipped': b'magenta',
     b'phabricator.action.updated': b'magenta',
     b'phabricator.desc': b'',
     b'phabricator.drev': b'bold',
     b'phabricator.node': b'',
     b'phabricator.status.abandoned': b'magenta dim',
     b'phabricator.status.accepted': b'green bold',
     b'phabricator.status.closed': b'green',
     b'phabricator.status.needsreview': b'yellow',
     b'phabricator.status.needsrevision': b'red',
     b'phabricator.status.changesplanned': b'red',
 }
 
 _VCR_FLAGS = [
     (
         b'',
         b'test-vcr',
         b'',
         _(
             b'Path to a vcr file. If nonexistent, will record a new vcr transcript'
             b', otherwise will mock all http requests using the specified vcr file.'
             b' (ADVANCED)'
         ),
     ),
 ]
 
 
 @eh.wrapfunction(localrepo, "loadhgrc")
 def _loadhgrc(orig, ui, wdirvfs, hgvfs, requirements):
     """Load ``.arcconfig`` content into a ui instance on repository open.
     """
     result = False
     arcconfig = {}
 
     try:
         # json.loads only accepts bytes from 3.6+
         rawparams = encoding.unifromlocal(wdirvfs.read(b".arcconfig"))
         # json.loads only returns unicode strings
         arcconfig = pycompat.rapply(
             lambda x: encoding.unitolocal(x)
             if isinstance(x, pycompat.unicode)
             else x,
             pycompat.json_loads(rawparams),
         )
 
         result = True
     except ValueError:
         ui.warn(_(b"invalid JSON in %s\n") % wdirvfs.join(b".arcconfig"))
     except IOError:
         pass
 
+    cfg = util.sortdict()
+
     if b"repository.callsign" in arcconfig:
-        ui.applyconfig(
-            {(b"phabricator", b"callsign"): arcconfig[b"repository.callsign"]},
-            source=wdirvfs.join(b".arcconfig"),
-        )
+        cfg[(b"phabricator", b"callsign")] = arcconfig[b"repository.callsign"]
+
+    if b"phabricator.uri" in arcconfig:
+        cfg[(b"phabricator", b"url")] = arcconfig[b"phabricator.uri"]
+
+    if cfg:
+        ui.applyconfig(cfg, source=wdirvfs.join(b".arcconfig"))
 
     return orig(ui, wdirvfs, hgvfs, requirements) or result  # Load .hg/hgrc
 
 
 def vcrcommand(name, flags, spec, helpcategory=None, optionalrepo=False):
     fullflags = flags + _VCR_FLAGS
 
     def hgmatcher(r1, r2):
         if r1.uri != r2.uri or r1.method != r2.method:
             return False
         r1params = util.urlreq.parseqs(r1.body)
         r2params = util.urlreq.parseqs(r2.body)
         for key in r1params:
             if key not in r2params:
                 return False
             value = r1params[key][0]
             # we want to compare json payloads without worrying about ordering
             if value.startswith(b'{') and value.endswith(b'}'):
                 r1json = pycompat.json_loads(value)
                 r2json = pycompat.json_loads(r2params[key][0])
                 if r1json != r2json:
                     return False
             elif r2params[key][0] != value:
                 return False
         return True
 
     def sanitiserequest(request):
         request.body = re.sub(
             br'cli-[a-z0-9]+', br'cli-hahayouwish', request.body
         )
         return request
 
     def sanitiseresponse(response):
         if 'set-cookie' in response['headers']:
             del response['headers']['set-cookie']
         return response
 
     def decorate(fn):
         def inner(*args, **kwargs):
             cassette = pycompat.fsdecode(kwargs.pop('test_vcr', None))
             if cassette:
                 import hgdemandimport
 
                 with hgdemandimport.deactivated():
                     import vcr as vcrmod
                     import vcr.stubs as stubs
 
                     vcr = vcrmod.VCR(
                         serializer='json',
                         before_record_request=sanitiserequest,
                         before_record_response=sanitiseresponse,
                         custom_patches=[
                             (
                                 urlmod,
                                 'httpconnection',
                                 stubs.VCRHTTPConnection,
                             ),
                             (
                                 urlmod,
                                 'httpsconnection',
                                 stubs.VCRHTTPSConnection,
                             ),
                         ],
                     )
                     vcr.register_matcher('hgmatcher', hgmatcher)
                     with vcr.use_cassette(cassette, match_on=['hgmatcher']):
                         return fn(*args, **kwargs)
             return fn(*args, **kwargs)
 
         inner.__name__ = fn.__name__
         inner.__doc__ = fn.__doc__
         return command(
             name,
             fullflags,
             spec,
             helpcategory=helpcategory,
             optionalrepo=optionalrepo,
         )(inner)
 
     return decorate
 
 
 def urlencodenested(params):
     """like urlencode, but works with nested parameters.
 
     For example, if params is {'a': ['b', 'c'], 'd': {'e': 'f'}}, it will be
     flattened to {'a[0]': 'b', 'a[1]': 'c', 'd[e]': 'f'} and then passed to
     urlencode. Note: the encoding is consistent with PHP's http_build_query.
     """
     flatparams = util.sortdict()
 
     def process(prefix, obj):
         if isinstance(obj, bool):
             obj = {True: b'true', False: b'false'}[obj]  # Python -> PHP form
         lister = lambda l: [(b'%d' % k, v) for k, v in enumerate(l)]
         items = {list: lister, dict: lambda x: x.items()}.get(type(obj))
         if items is None:
             flatparams[prefix] = obj
         else:
             for k, v in items(obj):
                 if prefix:
                     process(b'%s[%s]' % (prefix, k), v)
                 else:
                     process(k, v)
 
     process(b'', params)
     return util.urlreq.urlencode(flatparams)
 
 
 def readurltoken(ui):
     """return conduit url, token and make sure they exist
 
     Currently read from [auth] config section. In the future, it might
     make sense to read from .arcconfig and .arcrc as well.
     """
     url = ui.config(b'phabricator', b'url')
     if not url:
         raise error.Abort(
             _(b'config %s.%s is required') % (b'phabricator', b'url')
         )
 
     res = httpconnectionmod.readauthforuri(ui, url, util.url(url).user)
     token = None
 
     if res:
         group, auth = res
 
         ui.debug(b"using auth.%s.* for authentication\n" % group)
 
         token = auth.get(b'phabtoken')
 
     if not token:
         raise error.Abort(
             _(b'Can\'t find conduit token associated to %s') % (url,)
         )
 
     return url, token
 
 
 def callconduit(ui, name, params):
     """call Conduit API, params is a dict. return json.loads result, or None"""
     host, token = readurltoken(ui)
     url, authinfo = util.url(b'/'.join([host, b'api', name])).authinfo()
     ui.debug(b'Conduit Call: %s %s\n' % (url, pycompat.byterepr(params)))
     params = params.copy()
     params[b'__conduit__'] = {
         b'token': token,
     }
     rawdata = {
         b'params': templatefilters.json(params),
         b'output': b'json',
         b'__conduit__': 1,
     }
     data = urlencodenested(rawdata)
     curlcmd = ui.config(b'phabricator', b'curlcmd')
     if curlcmd:
         sin, sout = procutil.popen2(
             b'%s -d @- %s' % (curlcmd, procutil.shellquote(url))
         )
         sin.write(data)
         sin.close()
         body = sout.read()
     else:
         urlopener = urlmod.opener(ui, authinfo)
         request = util.urlreq.request(pycompat.strurl(url), data=data)
         with contextlib.closing(urlopener.open(request)) as rsp:
             body = rsp.read()
     ui.debug(b'Conduit Response: %s\n' % body)
     parsed = pycompat.rapply(
         lambda x: encoding.unitolocal(x)
         if isinstance(x, pycompat.unicode)
         else x,
         # json.loads only accepts bytes from py3.6+
         pycompat.json_loads(encoding.unifromlocal(body)),
     )
     if parsed.get(b'error_code'):
         msg = _(b'Conduit Error (%s): %s') % (
             parsed[b'error_code'],
             parsed[b'error_info'],
         )
         raise error.Abort(msg)
     return parsed[b'result']
 
 
 @vcrcommand(b'debugcallconduit', [], _(b'METHOD'), optionalrepo=True)
 def debugcallconduit(ui, repo, name):
     """call Conduit API
 
     Call parameters are read from stdin as a JSON blob. Result will be written
     to stdout as a JSON blob.
     """
     # json.loads only accepts bytes from 3.6+
     rawparams = encoding.unifromlocal(ui.fin.read())
     # json.loads only returns unicode strings
     params = pycompat.rapply(
         lambda x: encoding.unitolocal(x)
         if isinstance(x, pycompat.unicode)
         else x,
         pycompat.json_loads(rawparams),
     )
     # json.dumps only accepts unicode strings
     result = pycompat.rapply(
         lambda x: encoding.unifromlocal(x) if isinstance(x, bytes) else x,
         callconduit(ui, name, params),
     )
     s = json.dumps(result, sort_keys=True, indent=2, separators=(u',', u': '))
     ui.write(b'%s\n' % encoding.unitolocal(s))
 
 
 def getrepophid(repo):
     """given callsign, return repository PHID or None"""
     # developer config: phabricator.repophid
     repophid = repo.ui.config(b'phabricator', b'repophid')
     if repophid:
         return repophid
     callsign = repo.ui.config(b'phabricator', b'callsign')
     if not callsign:
         return None
     query = callconduit(
         repo.ui,
         b'diffusion.repository.search',
         {b'constraints': {b'callsigns': [callsign]}},
     )
     if len(query[b'data']) == 0:
         return None
     repophid = query[b'data'][0][b'phid']
     repo.ui.setconfig(b'phabricator', b'repophid', repophid)
     return repophid
 
 
 _differentialrevisiontagre = re.compile(br'\AD([1-9][0-9]*)\Z')
 _differentialrevisiondescre = re.compile(
     br'^Differential Revision:\s*(?P<url>(?:.*)D(?P<id>[1-9][0-9]*))$', re.M
 )
 
 
 def getoldnodedrevmap(repo, nodelist):
     """find previous nodes that has been sent to Phabricator
 
     return {node: (oldnode, Differential diff, Differential Revision ID)}
     for node in nodelist with known previous sent versions, or associated
     Differential Revision IDs. ``oldnode`` and ``Differential diff`` could
     be ``None``.
 
     Examines commit messages like "Differential Revision:" to get the
     association information.
 
     If such commit message line is not found, examines all precursors and their
     tags. Tags with format like "D1234" are considered a match and the node
     with that tag, and the number after "D" (ex. 1234) will be returned.
 
     The ``old node``, if not None, is guaranteed to be the last diff of
     corresponding Differential Revision, and exist in the repo.
     """
     unfi = repo.unfiltered()
     has_node = unfi.changelog.index.has_node
 
     result = {}  # {node: (oldnode?, lastdiff?, drev)}
     toconfirm = {}  # {node: (force, {precnode}, drev)}
     for node in nodelist:
         ctx = unfi[node]
         # For tags like "D123", put them into "toconfirm" to verify later
         precnodes = list(obsutil.allpredecessors(unfi.obsstore, [node]))
         for n in precnodes:
             if has_node(n):
                 for tag in unfi.nodetags(n):
                     m = _differentialrevisiontagre.match(tag)
                     if m:
                         toconfirm[node] = (0, set(precnodes), int(m.group(1)))
                         break
                 else:
                     continue  # move to next predecessor
                 break  # found a tag, stop
         else:
             # Check commit message
             m = _differentialrevisiondescre.search(ctx.description())
             if m:
                 toconfirm[node] = (1, set(precnodes), int(m.group('id')))
 
     # Double check if tags are genuine by collecting all old nodes from
     # Phabricator, and expect precursors overlap with it.
     if toconfirm:
         drevs = [drev for force, precs, drev in toconfirm.values()]
         alldiffs = callconduit(
             unfi.ui, b'differential.querydiffs', {b'revisionIDs': drevs}
         )
         getnode = lambda d: bin(getdiffmeta(d).get(b'node', b'')) or None
         for newnode, (force, precset, drev) in toconfirm.items():
             diffs = [
                 d for d in alldiffs.values() if int(d[b'revisionID']) == drev
             ]
 
             # "precursors" as known by Phabricator
             phprecset = set(getnode(d) for d in diffs)
 
             # Ignore if precursors (Phabricator and local repo) do not overlap,
             # and force is not set (when commit message says nothing)
             if not force and not bool(phprecset & precset):
                 tagname = b'D%d' % drev
                 tags.tag(
                     repo,
                     tagname,
                     nullid,
                     message=None,
                     user=None,
                     date=None,
                     local=True,
                 )
                 unfi.ui.warn(
                     _(
                         b'D%d: local tag removed - does not match '
                         b'Differential history\n'
                     )
                     % drev
                 )
                 continue
 
             # Find the last node using Phabricator metadata, and make sure it
             # exists in the repo
             oldnode = lastdiff = None
             if diffs:
                 lastdiff = max(diffs, key=lambda d: int(d[b'id']))
                 oldnode = getnode(lastdiff)
                 if oldnode and not has_node(oldnode):
                     oldnode = None
 
             result[newnode] = (oldnode, lastdiff, drev)
 
     return result
 
 
 def getdrevmap(repo, revs):
     """Return a dict mapping each rev in `revs` to their Differential Revision
     ID or None.
     """
     result = {}
     for rev in revs:
         result[rev] = None
         ctx = repo[rev]
         # Check commit message
         m = _differentialrevisiondescre.search(ctx.description())
         if m:
             result[rev] = int(m.group('id'))
             continue
         # Check tags
         for tag in repo.nodetags(ctx.node()):
             m = _differentialrevisiontagre.match(tag)
             if m:
                 result[rev] = int(m.group(1))
                 break
 
     return result
 
 
 def getdiff(ctx, diffopts):
     """plain-text diff without header (user, commit message, etc)"""
     output = util.stringio()
     for chunk, _label in patch.diffui(
         ctx.repo(), ctx.p1().node(), ctx.node(), None, opts=diffopts
     ):
         output.write(chunk)
     return output.getvalue()
 
 
 class DiffChangeType(object):
     ADD = 1
     CHANGE = 2
     DELETE = 3
     MOVE_AWAY = 4
     COPY_AWAY = 5
     MOVE_HERE = 6
     COPY_HERE = 7
     MULTICOPY = 8
 
 
 class DiffFileType(object):
     TEXT = 1
     IMAGE = 2
     BINARY = 3
 
 
 @attr.s
 class phabhunk(dict):
     """Represents a Differential hunk, which is owned by a Differential change
     """
 
     oldOffset = attr.ib(default=0)  # camelcase-required
     oldLength = attr.ib(default=0)  # camelcase-required
     newOffset = attr.ib(default=0)  # camelcase-required
     newLength = attr.ib(default=0)  # camelcase-required
     corpus = attr.ib(default='')
     # These get added to the phabchange's equivalents
     addLines = attr.ib(default=0)  # camelcase-required
     delLines = attr.ib(default=0)  # camelcase-required
 
 
 @attr.s
 class phabchange(object):
     """Represents a Differential change, owns Differential hunks and owned by a
     Differential diff.  Each one represents one file in a diff.
     """
 
     currentPath = attr.ib(default=None)  # camelcase-required
     oldPath = attr.ib(default=None)  # camelcase-required
     awayPaths = attr.ib(default=attr.Factory(list))  # camelcase-required
     metadata = attr.ib(default=attr.Factory(dict))
     oldProperties = attr.ib(default=attr.Factory(dict))  # camelcase-required
     newProperties = attr.ib(default=attr.Factory(dict))  # camelcase-required
     type = attr.ib(default=DiffChangeType.CHANGE)
     fileType = attr.ib(default=DiffFileType.TEXT)  # camelcase-required
     commitHash = attr.ib(default=None)  # camelcase-required
     addLines = attr.ib(default=0)  # camelcase-required
     delLines = attr.ib(default=0)  # camelcase-required
     hunks = attr.ib(default=attr.Factory(list))
 
     def copynewmetadatatoold(self):
         for key in list(self.metadata.keys()):
             newkey = key.replace(b'new:', b'old:')
             self.metadata[newkey] = self.metadata[key]
 
     def addoldmode(self, value):
         self.oldProperties[b'unix:filemode'] = value
 
     def addnewmode(self, value):
         self.newProperties[b'unix:filemode'] = value
 
     def addhunk(self, hunk):
         if not isinstance(hunk, phabhunk):
             raise error.Abort(b'phabchange.addhunk only takes phabhunks')
         self.hunks.append(pycompat.byteskwargs(attr.asdict(hunk)))
         # It's useful to include these stats since the Phab web UI shows them,
         # and uses them to estimate how large a change a Revision is. Also used
         # in email subjects for the [+++--] bit.
         self.addLines += hunk.addLines
         self.delLines += hunk.delLines
 
 
 @attr.s
 class phabdiff(object):
     """Represents a Differential diff, owns Differential changes.  Corresponds
     to a commit.
     """
 
     # Doesn't seem to be any reason to send this (output of uname -n)
     sourceMachine = attr.ib(default=b'')  # camelcase-required
     sourcePath = attr.ib(default=b'/')  # camelcase-required
     sourceControlBaseRevision = attr.ib(default=b'0' * 40)  # camelcase-required
     sourceControlPath = attr.ib(default=b'/')  # camelcase-required
     sourceControlSystem = attr.ib(default=b'hg')  # camelcase-required
     branch = attr.ib(default=b'default')
     bookmark = attr.ib(default=None)
     creationMethod = attr.ib(default=b'phabsend')  # camelcase-required
     lintStatus = attr.ib(default=b'none')  # camelcase-required
     unitStatus = attr.ib(default=b'none')  # camelcase-required
     changes = attr.ib(default=attr.Factory(dict))
     repositoryPHID = attr.ib(default=None)  # camelcase-required
 
     def addchange(self, change):
         if not isinstance(change, phabchange):
             raise error.Abort(b'phabdiff.addchange only takes phabchanges')
         self.changes[change.currentPath] = pycompat.byteskwargs(
             attr.asdict(change)
         )
 
 
 def maketext(pchange, ctx, fname):
     """populate the phabchange for a text file"""
     repo = ctx.repo()
     fmatcher = match.exact([fname])
     diffopts = mdiff.diffopts(git=True, context=32767)
     _pfctx, _fctx, header, fhunks = next(
         patch.diffhunks(repo, ctx.p1(), ctx, fmatcher, opts=diffopts)
     )
 
     for fhunk in fhunks:
         (oldOffset, oldLength, newOffset, newLength), lines = fhunk
         corpus = b''.join(lines[1:])
         shunk = list(header)
         shunk.extend(lines)
         _mf, _mt, addLines, delLines, _hb = patch.diffstatsum(
             patch.diffstatdata(util.iterlines(shunk))
         )
         pchange.addhunk(
             phabhunk(
                 oldOffset,
                 oldLength,
                 newOffset,
                 newLength,
                 corpus,
                 addLines,
                 delLines,
             )
         )
 
 
 def uploadchunks(fctx, fphid):
     """upload large binary files as separate chunks.
     Phab requests chunking over 8MiB, and splits into 4MiB chunks
     """
     ui = fctx.repo().ui
     chunks = callconduit(ui, b'file.querychunks', {b'filePHID': fphid})
     with ui.makeprogress(
         _(b'uploading file chunks'), unit=_(b'chunks'), total=len(chunks)
     ) as progress:
         for chunk in chunks:
             progress.increment()
             if chunk[b'complete']:
                 continue
             bstart = int(chunk[b'byteStart'])
             bend = int(chunk[b'byteEnd'])
             callconduit(
                 ui,
                 b'file.uploadchunk',
                 {
                     b'filePHID': fphid,
                     b'byteStart': bstart,
                     b'data': base64.b64encode(fctx.data()[bstart:bend]),
                     b'dataEncoding': b'base64',
                 },
             )
 
 
 def uploadfile(fctx):
     """upload binary files to Phabricator"""
     repo = fctx.repo()
     ui = repo.ui
     fname = fctx.path()
     size = fctx.size()
     fhash = pycompat.bytestr(hashlib.sha256(fctx.data()).hexdigest())
 
     # an allocate call is required first to see if an upload is even required
     # (Phab might already have it) and to determine if chunking is needed
     allocateparams = {
         b'name': fname,
         b'contentLength': size,
         b'contentHash': fhash,
     }
     filealloc = callconduit(ui, b'file.allocate', allocateparams)
     fphid = filealloc[b'filePHID']
 
     if filealloc[b'upload']:
         ui.write(_(b'uploading %s\n') % bytes(fctx))
         if not fphid:
             uploadparams = {
                 b'name': fname,
                 b'data_base64': base64.b64encode(fctx.data()),
             }
             fphid = callconduit(ui, b'file.upload', uploadparams)
         else:
             uploadchunks(fctx, fphid)
     else:
         ui.debug(b'server already has %s\n' % bytes(fctx))
 
     if not fphid:
         raise error.Abort(b'Upload of %s failed.' % bytes(fctx))
 
     return fphid
 
 
 def addoldbinary(pchange, fctx, originalfname):
     """add the metadata for the previous version of a binary file to the
     phabchange for the new version
     """
     oldfctx = fctx.p1()[originalfname]
     if fctx.cmp(oldfctx):
         # Files differ, add the old one
         pchange.metadata[b'old:file:size'] = oldfctx.size()
         mimeguess, _enc = mimetypes.guess_type(
             encoding.unifromlocal(oldfctx.path())
         )
         if mimeguess:
             pchange.metadata[b'old:file:mime-type'] = pycompat.bytestr(
                 mimeguess
             )
         fphid = uploadfile(oldfctx)
         pchange.metadata[b'old:binary-phid'] = fphid
     else:
         # If it's left as IMAGE/BINARY web UI might try to display it
         pchange.fileType = DiffFileType.TEXT
         pchange.copynewmetadatatoold()
 
 
 def makebinary(pchange, fctx):
     """populate the phabchange for a binary file"""
     pchange.fileType = DiffFileType.BINARY
     fphid = uploadfile(fctx)
     pchange.metadata[b'new:binary-phid'] = fphid
     pchange.metadata[b'new:file:size'] = fctx.size()
     mimeguess, _enc = mimetypes.guess_type(encoding.unifromlocal(fctx.path()))
     if mimeguess:
         mimeguess = pycompat.bytestr(mimeguess)
         pchange.metadata[b'new:file:mime-type'] = mimeguess
         if mimeguess.startswith(b'image/'):
             pchange.fileType = DiffFileType.IMAGE
 
 
 # Copied from mercurial/patch.py
 gitmode = {b'l': b'120000', b'x': b'100755', b'': b'100644'}
 
 
 def notutf8(fctx):
     """detect non-UTF-8 text files since Phabricator requires them to be marked
     as binary
     """
     try:
         fctx.data().decode('utf-8')
         if fctx.parents():
             fctx.p1().data().decode('utf-8')
         return False
     except UnicodeDecodeError:
         fctx.repo().ui.write(
             _(b'file %s detected as non-UTF-8, marked as binary\n')
             % fctx.path()
         )
         return True
 
 
 def addremoved(pdiff, ctx, removed):
     """add removed files to the phabdiff. Shouldn't include moves"""
     for fname in removed:
         pchange = phabchange(
             currentPath=fname, oldPath=fname, type=DiffChangeType.DELETE
         )
         pchange.addoldmode(gitmode[ctx.p1()[fname].flags()])
         fctx = ctx.p1()[fname]
         if not (fctx.isbinary() or notutf8(fctx)):
             maketext(pchange, ctx, fname)
 
         pdiff.addchange(pchange)
 
 
 def addmodified(pdiff, ctx, modified):
     """add modified files to the phabdiff"""
     for fname in modified:
         fctx = ctx[fname]
         pchange = phabchange(currentPath=fname, oldPath=fname)
         filemode = gitmode[ctx[fname].flags()]
         originalmode = gitmode[ctx.p1()[fname].flags()]
         if filemode != originalmode:
             pchange.addoldmode(originalmode)
             pchange.addnewmode(filemode)
 
         if fctx.isbinary() or notutf8(fctx):
             makebinary(pchange, fctx)
             addoldbinary(pchange, fctx, fname)
         else:
             maketext(pchange, ctx, fname)
 
         pdiff.addchange(pchange)
 
 
 def addadded(pdiff, ctx, added, removed):
     """add file adds to the phabdiff, both new files and copies/moves"""
     # Keep track of files that've been recorded as moved/copied, so if there are
     # additional copies we can mark them (moves get removed from removed)
     copiedchanges = {}
     movedchanges = {}
     for fname in added:
         fctx = ctx[fname]
         pchange = phabchange(currentPath=fname)
 
         filemode = gitmode[ctx[fname].flags()]
         renamed = fctx.renamed()
 
         if renamed:
             originalfname = renamed[0]
             originalmode = gitmode[ctx.p1()[originalfname].flags()]
             pchange.oldPath = originalfname
 
             if originalfname in removed:
                 origpchange = phabchange(
                     currentPath=originalfname,
                     oldPath=originalfname,
                     type=DiffChangeType.MOVE_AWAY,
                     awayPaths=[fname],
                 )
                 movedchanges[originalfname] = origpchange
                 removed.remove(originalfname)
                 pchange.type = DiffChangeType.MOVE_HERE
             elif originalfname in movedchanges:
                 movedchanges[originalfname].type = DiffChangeType.MULTICOPY
                 movedchanges[originalfname].awayPaths.append(fname)
                 pchange.type = DiffChangeType.COPY_HERE
             else:  # pure copy
                 if originalfname not in copiedchanges:
                     origpchange = phabchange(
                         currentPath=originalfname, type=DiffChangeType.COPY_AWAY
                     )
                     copiedchanges[originalfname] = origpchange
                 else:
                     origpchange = copiedchanges[originalfname]
                 origpchange.awayPaths.append(fname)
                 pchange.type = DiffChangeType.COPY_HERE
 
             if filemode != originalmode:
                 pchange.addoldmode(originalmode)
                 pchange.addnewmode(filemode)
         else:  # Brand-new file
             pchange.addnewmode(gitmode[fctx.flags()])
             pchange.type = DiffChangeType.ADD
 
         if fctx.isbinary() or notutf8(fctx):
             makebinary(pchange, fctx)
             if renamed:
                 addoldbinary(pchange, fctx, originalfname)
         else:
             maketext(pchange, ctx, fname)
 
         pdiff.addchange(pchange)
 
     for _path, copiedchange in copiedchanges.items():
         pdiff.addchange(copiedchange)
     for _path, movedchange in movedchanges.items():
         pdiff.addchange(movedchange)
 
 
 def creatediff(ctx):
     """create a Differential Diff"""
     repo = ctx.repo()
     repophid = getrepophid(repo)
     # Create a "Differential Diff" via "differential.creatediff" API
     pdiff = phabdiff(
         sourceControlBaseRevision=b'%s' % ctx.p1().hex(),
         branch=b'%s' % ctx.branch(),
     )
     modified, added, removed, _d, _u, _i, _c = ctx.p1().status(ctx)
     # addadded will remove moved files from removed, so addremoved won't get
     # them
     addadded(pdiff, ctx, added, removed)
     addmodified(pdiff, ctx, modified)
     addremoved(pdiff, ctx, removed)
     if repophid:
         pdiff.repositoryPHID = repophid
     diff = callconduit(
         repo.ui,
         b'differential.creatediff',
         pycompat.byteskwargs(attr.asdict(pdiff)),
     )
     if not diff:
         raise error.Abort(_(b'cannot create diff for %s') % ctx)
     return diff
 
 
 def writediffproperties(ctx, diff):
     """write metadata to diff so patches could be applied losslessly"""
     # creatediff returns with a diffid but query returns with an id
     diffid = diff.get(b'diffid', diff.get(b'id'))
     params = {
         b'diff_id': diffid,
         b'name': b'hg:meta',
         b'data': templatefilters.json(
             {
                 b'user': ctx.user(),
                 b'date': b'%d %d' % ctx.date(),
                 b'branch': ctx.branch(),
                 b'node': ctx.hex(),
                 b'parent': ctx.p1().hex(),
             }
         ),
     }
     callconduit(ctx.repo().ui, b'differential.setdiffproperty', params)
 
     params = {
         b'diff_id': diffid,
         b'name': b'local:commits',
         b'data': templatefilters.json(
             {
                 ctx.hex(): {
                     b'author': stringutil.person(ctx.user()),
                     b'authorEmail': stringutil.email(ctx.user()),
                     b'time': int(ctx.date()[0]),
                     b'commit': ctx.hex(),
                     b'parents': [ctx.p1().hex()],
                     b'branch': ctx.branch(),
                 },
             }
         ),
     }
     callconduit(ctx.repo().ui, b'differential.setdiffproperty', params)
 
 
 def createdifferentialrevision(
     ctx,
     revid=None,
     parentrevphid=None,
     oldnode=None,
     olddiff=None,
     actions=None,
     comment=None,
 ):
     """create or update a Differential Revision
 
     If revid is None, create a new Differential Revision, otherwise update
     revid. If parentrevphid is not None, set it as a dependency.
 
     If oldnode is not None, check if the patch content (without commit message
     and metadata) has changed before creating another diff.
 
     If actions is not None, they will be appended to the transaction.
     """
     repo = ctx.repo()
     if oldnode:
         diffopts = mdiff.diffopts(git=True, context=32767)
         oldctx = repo.unfiltered()[oldnode]
         neednewdiff = getdiff(ctx, diffopts) != getdiff(oldctx, diffopts)
     else:
         neednewdiff = True
 
     transactions = []
     if neednewdiff:
         diff = creatediff(ctx)
         transactions.append({b'type': b'update', b'value': diff[b'phid']})
         if comment:
             transactions.append({b'type': b'comment', b'value': comment})
     else:
         # Even if we don't need to upload a new diff because the patch content
         # does not change. We might still need to update its metadata so
         # pushers could know the correct node metadata.
         assert olddiff
         diff = olddiff
     writediffproperties(ctx, diff)
 
     # Set the parent Revision every time, so commit re-ordering is picked-up
     if parentrevphid:
         transactions.append(
             {b'type': b'parents.set', b'value': [parentrevphid]}
         )
 
     if actions:
         transactions += actions
 
     # Parse commit message and update related fields.
     desc = ctx.description()
     info = callconduit(
         repo.ui, b'differential.parsecommitmessage', {b'corpus': desc}
     )
     for k, v in info[b'fields'].items():
         if k in [b'title', b'summary', b'testPlan']:
             transactions.append({b'type': k, b'value': v})
 
     params = {b'transactions': transactions}
     if revid is not None:
         # Update an existing Differential Revision
         params[b'objectIdentifier'] = revid
 
     revision = callconduit(repo.ui, b'differential.revision.edit', params)
     if not revision:
         raise error.Abort(_(b'cannot create revision for %s') % ctx)
 
     return revision, diff
 
 
 def userphids(repo, names):
     """convert user names to PHIDs"""
     names = [name.lower() for name in names]
     query = {b'constraints': {b'usernames': names}}
     result = callconduit(repo.ui, b'user.search', query)
     # username not found is not an error of the API. So check if we have missed
     # some names here.
     data = result[b'data']
     resolved = set(entry[b'fields'][b'username'].lower() for entry in data)
     unresolved = set(names) - resolved
     if unresolved:
         raise error.Abort(
             _(b'unknown username: %s') % b' '.join(sorted(unresolved))
         )
     return [entry[b'phid'] for entry in data]
 
 
 @vcrcommand(
     b'phabsend',
     [
         (b'r', b'rev', [], _(b'revisions to send'), _(b'REV')),
         (b'', b'amend', True, _(b'update commit messages')),
         (b'', b'reviewer', [], _(b'specify reviewers')),
         (b'', b'blocker', [], _(b'specify blocking reviewers')),
         (
             b'm',
             b'comment',
             b'',
             _(b'add a comment to Revisions with new/updated Diffs'),
         ),
         (b'', b'confirm', None, _(b'ask for confirmation before sending')),
     ],
     _(b'REV [OPTIONS]'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT,
 )
 def phabsend(ui, repo, *revs, **opts):
     """upload changesets to Phabricator
 
     If there are multiple revisions specified, they will be send as a stack
     with a linear dependencies relationship using the order specified by the
     revset.
 
     For the first time uploading changesets, local tags will be created to
     maintain the association. After the first time, phabsend will check
     obsstore and tags information so it can figure out whether to update an
     existing Differential Revision, or create a new one.
 
     If --amend is set, update commit messages so they have the
     ``Differential Revision`` URL, remove related tags. This is similar to what
     arcanist will do, and is more desired in author-push workflows. Otherwise,
     use local tags to record the ``Differential Revision`` association.
 
     The --confirm option lets you confirm changesets before sending them. You
     can also add following to your configuration file to make it default
     behaviour::
 
         [phabsend]
         confirm = true
 
     phabsend will check obsstore and the above association to decide whether to
     update an existing Differential Revision, or create a new one.
     """
     opts = pycompat.byteskwargs(opts)
     revs = list(revs) + opts.get(b'rev', [])
     revs = scmutil.revrange(repo, revs)
     revs.sort()  # ascending order to preserve topological parent/child in phab
 
     if not revs:
         raise error.Abort(_(b'phabsend requires at least one changeset'))
     if opts.get(b'amend'):
         cmdutil.checkunfinished(repo)
 
     # {newnode: (oldnode, olddiff, olddrev}
     oldmap = getoldnodedrevmap(repo, [repo[r].node() for r in revs])
 
     confirm = ui.configbool(b'phabsend', b'confirm')
     confirm |= bool(opts.get(b'confirm'))
     if confirm:
         confirmed = _confirmbeforesend(repo, revs, oldmap)
         if not confirmed:
             raise error.Abort(_(b'phabsend cancelled'))
 
     actions = []
     reviewers = opts.get(b'reviewer', [])
     blockers = opts.get(b'blocker', [])
     phids = []
     if reviewers:
         phids.extend(userphids(repo, reviewers))
     if blockers:
         phids.extend(
             map(lambda phid: b'blocking(%s)' % phid, userphids(repo, blockers))
         )
     if phids:
         actions.append({b'type': b'reviewers.add', b'value': phids})
 
     drevids = []  # [int]
     diffmap = {}  # {newnode: diff}
 
     # Send patches one by one so we know their Differential Revision PHIDs and
     # can provide dependency relationship
     lastrevphid = None
     for rev in revs:
         ui.debug(b'sending rev %d\n' % rev)
         ctx = repo[rev]
 
         # Get Differential Revision ID
         oldnode, olddiff, revid = oldmap.get(ctx.node(), (None, None, None))
         if oldnode != ctx.node() or opts.get(b'amend'):
             # Create or update Differential Revision
             revision, diff = createdifferentialrevision(
                 ctx,
                 revid,
                 lastrevphid,
                 oldnode,
                 olddiff,
                 actions,
                 opts.get(b'comment'),
             )
             diffmap[ctx.node()] = diff
             newrevid = int(revision[b'object'][b'id'])
             newrevphid = revision[b'object'][b'phid']
             if revid:
                 action = b'updated'
             else:
                 action = b'created'
 
             # Create a local tag to note the association, if commit message
             # does not have it already
             m = _differentialrevisiondescre.search(ctx.description())
             if not m or int(m.group('id')) != newrevid:
                 tagname = b'D%d' % newrevid
                 tags.tag(
                     repo,
                     tagname,
                     ctx.node(),
                     message=None,
                     user=None,
                     date=None,
                     local=True,
                 )
         else:
             # Nothing changed. But still set "newrevphid" so the next revision
             # could depend on this one and "newrevid" for the summary line.
             newrevphid = querydrev(repo, b'%d' % revid)[0][b'phid']
             newrevid = revid
             action = b'skipped'
 
         actiondesc = ui.label(
             {
                 b'created': _(b'created'),
                 b'skipped': _(b'skipped'),
                 b'updated': _(b'updated'),
             }[action],
             b'phabricator.action.%s' % action,
         )
         drevdesc = ui.label(b'D%d' % newrevid, b'phabricator.drev')
         nodedesc = ui.label(bytes(ctx), b'phabricator.node')
         desc = ui.label(ctx.description().split(b'\n')[0], b'phabricator.desc')
         ui.write(
             _(b'%s - %s - %s: %s\n') % (drevdesc, actiondesc, nodedesc, desc)
         )
         drevids.append(newrevid)
         lastrevphid = newrevphid
 
     # Update commit messages and remove tags
     if opts.get(b'amend'):
         unfi = repo.unfiltered()
         drevs = callconduit(ui, b'differential.query', {b'ids': drevids})
         with repo.wlock(), repo.lock(), repo.transaction(b'phabsend'):
             wnode = unfi[b'.'].node()
             mapping = {}  # {oldnode: [newnode]}
             for i, rev in enumerate(revs):
                 old = unfi[rev]
                 drevid = drevids[i]
                 drev = [d for d in drevs if int(d[b'id']) == drevid][0]
                 newdesc = getdescfromdrev(drev)
                 # Make sure commit message contain "Differential Revision"
                 if old.description() != newdesc:
                     if old.phase() == phases.public:
                         ui.warn(
                             _(b"warning: not updating public commit %s\n")
                             % scmutil.formatchangeid(old)
                         )
                         continue
                     parents = [
                         mapping.get(old.p1().node(), (old.p1(),))[0],
                         mapping.get(old.p2().node(), (old.p2(),))[0],
                     ]
                     new = context.metadataonlyctx(
                         repo,
                         old,
                         parents=parents,
                         text=newdesc,
                         user=old.user(),
                         date=old.date(),
                         extra=old.extra(),
                     )
 
                     newnode = new.commit()
 
                     mapping[old.node()] = [newnode]
                     # Update diff property
                     # If it fails just warn and keep going, otherwise the DREV
                     # associations will be lost
                     try:
                         writediffproperties(unfi[newnode], diffmap[old.node()])
                     except util.urlerr.urlerror:
                         ui.warnnoi18n(
                             b'Failed to update metadata for D%d\n' % drevid
                         )
                 # Remove local tags since it's no longer necessary
                 tagname = b'D%d' % drevid
                 if tagname in repo.tags():
                     tags.tag(
                         repo,
                         tagname,
                         nullid,
                         message=None,
                         user=None,
                         date=None,
                         local=True,
                     )
             scmutil.cleanupnodes(repo, mapping, b'phabsend', fixphase=True)
             if wnode in mapping:
                 unfi.setparents(mapping[wnode][0])
 
 
 # Map from "hg:meta" keys to header understood by "hg import". The order is
 # consistent with "hg export" output.
 _metanamemap = util.sortdict(
     [
         (b'user', b'User'),
         (b'date', b'Date'),
         (b'branch', b'Branch'),
         (b'node', b'Node ID'),
         (b'parent', b'Parent '),
     ]
 )
 
 
 def _confirmbeforesend(repo, revs, oldmap):
     url, token = readurltoken(repo.ui)
     ui = repo.ui
     for rev in revs:
         ctx = repo[rev]
         desc = ctx.description().splitlines()[0]
         oldnode, olddiff, drevid = oldmap.get(ctx.node(), (None, None, None))
         if drevid:
             drevdesc = ui.label(b'D%d' % drevid, b'phabricator.drev')
         else:
             drevdesc = ui.label(_(b'NEW'), b'phabricator.drev')
 
         ui.write(
             _(b'%s - %s: %s\n')
             % (
                 drevdesc,
                 ui.label(bytes(ctx), b'phabricator.node'),
                 ui.label(desc, b'phabricator.desc'),
             )
         )
 
     if ui.promptchoice(
         _(b'Send the above changes to %s (yn)?$$ &Yes $$ &No') % url
     ):
         return False
 
     return True
 
 
 _knownstatusnames = {
     b'accepted',
     b'needsreview',
     b'needsrevision',
     b'closed',
     b'abandoned',
     b'changesplanned',
 }
 
 
 def _getstatusname(drev):
     """get normalized status name from a Differential Revision"""
     return drev[b'statusName'].replace(b' ', b'').lower()
 
 
 # Small language to specify differential revisions. Support symbols: (), :X,
 # +, and -.
 
 _elements = {
     # token-type: binding-strength, primary, prefix, infix, suffix
     b'(': (12, None, (b'group', 1, b')'), None, None),
     b':': (8, None, (b'ancestors', 8), None, None),
     b'&': (5, None, None, (b'and_', 5), None),
     b'+': (4, None, None, (b'add', 4), None),
     b'-': (4, None, None, (b'sub', 4), None),
     b')': (0, None, None, None, None),
     b'symbol': (0, b'symbol', None, None, None),
     b'end': (0, None, None, None, None),
 }
 
 
 def _tokenize(text):
     view = memoryview(text)  # zero-copy slice
     special = b'():+-& '
     pos = 0
     length = len(text)
     while pos < length:
         symbol = b''.join(
             itertools.takewhile(
                 lambda ch: ch not in special, pycompat.iterbytestr(view[pos:])
             )
         )
         if symbol:
             yield (b'symbol', symbol, pos)
             pos += len(symbol)
         else:  # special char, ignore space
             if text[pos : pos + 1] != b' ':
                 yield (text[pos : pos + 1], None, pos)
             pos += 1
     yield (b'end', None, pos)
 
 
 def _parse(text):
     tree, pos = parser.parser(_elements).parse(_tokenize(text))
     if pos != len(text):
         raise error.ParseError(b'invalid token', pos)
     return tree
 
 
 def _parsedrev(symbol):
     """str -> int or None, ex. 'D45' -> 45; '12' -> 12; 'x' -> None"""
     if symbol.startswith(b'D') and symbol[1:].isdigit():
         return int(symbol[1:])
     if symbol.isdigit():
         return int(symbol)
 
 
 def _prefetchdrevs(tree):
     """return ({single-drev-id}, {ancestor-drev-id}) to prefetch"""
     drevs = set()
     ancestordrevs = set()
     op = tree[0]
     if op == b'symbol':
         r = _parsedrev(tree[1])
         if r:
             drevs.add(r)
     elif op == b'ancestors':
         r, a = _prefetchdrevs(tree[1])
         drevs.update(r)
         ancestordrevs.update(r)
         ancestordrevs.update(a)
     else:
         for t in tree[1:]:
             r, a = _prefetchdrevs(t)
             drevs.update(r)
             ancestordrevs.update(a)
     return drevs, ancestordrevs
 
 
 def querydrev(repo, spec):
     """return a list of "Differential Revision" dicts
 
     spec is a string using a simple query language, see docstring in phabread
     for details.
 
     A "Differential Revision dict" looks like:
 
         {
             "id": "2",
             "phid": "PHID-DREV-672qvysjcczopag46qty",
             "title": "example",
             "uri": "https://phab.example.com/D2",
             "dateCreated": "1499181406",
             "dateModified": "1499182103",
             "authorPHID": "PHID-USER-tv3ohwc4v4jeu34otlye",
             "status": "0",
             "statusName": "Needs Review",
             "properties": [],
             "branch": null,
             "summary": "",
             "testPlan": "",
             "lineCount": "2",
             "activeDiffPHID": "PHID-DIFF-xoqnjkobbm6k4dk6hi72",
             "diffs": [
               "3",
               "4",
             ],
             "commits": [],
             "reviewers": [],
             "ccs": [],
             "hashes": [],
             "auxiliary": {
               "phabricator:projects": [],
               "phabricator:depends-on": [
                 "PHID-DREV-gbapp366kutjebt7agcd"
               ]
             },
             "repositoryPHID": "PHID-REPO-hub2hx62ieuqeheznasv",
             "sourcePath": null
         }
     """
 
     def fetch(params):
         """params -> single drev or None"""
         key = (params.get(b'ids') or params.get(b'phids') or [None])[0]
         if key in prefetched:
             return prefetched[key]
         drevs = callconduit(repo.ui, b'differential.query', params)
         # Fill prefetched with the result
         for drev in drevs:
             prefetched[drev[b'phid']] = drev
             prefetched[int(drev[b'id'])] = drev
         if key not in prefetched:
             raise error.Abort(
                 _(b'cannot get Differential Revision %r') % params
             )
         return prefetched[key]
 
     def getstack(topdrevids):
         """given a top, get a stack from the bottom, [id] -> [id]"""
         visited = set()
         result = []
         queue = [{b'ids': [i]} for i in topdrevids]
         while queue:
             params = queue.pop()
             drev = fetch(params)
             if drev[b'id'] in visited:
                 continue
             visited.add(drev[b'id'])
             result.append(int(drev[b'id']))
             auxiliary = drev.get(b'auxiliary', {})
             depends = auxiliary.get(b'phabricator:depends-on', [])
             for phid in depends:
                 queue.append({b'phids': [phid]})
         result.reverse()
         return smartset.baseset(result)
 
     # Initialize prefetch cache
     prefetched = {}  # {id or phid: drev}
 
     tree = _parse(spec)
     drevs, ancestordrevs = _prefetchdrevs(tree)
 
     # developer config: phabricator.batchsize
     batchsize = repo.ui.configint(b'phabricator', b'batchsize')
 
     # Prefetch Differential Revisions in batch
     tofetch = set(drevs)
     for r in ancestordrevs:
         tofetch.update(range(max(1, r - batchsize), r + 1))
     if drevs:
         fetch({b'ids': list(tofetch)})
     validids = sorted(set(getstack(list(ancestordrevs))) | set(drevs))
 
     # Walk through the tree, return smartsets
     def walk(tree):
         op = tree[0]
         if op == b'symbol':
             drev = _parsedrev(tree[1])
             if drev:
                 return smartset.baseset([drev])
             elif tree[1] in _knownstatusnames:
                 drevs = [
                     r
                     for r in validids
                     if _getstatusname(prefetched[r]) == tree[1]
                 ]
                 return smartset.baseset(drevs)
             else:
                 raise error.Abort(_(b'unknown symbol: %s') % tree[1])
         elif op in {b'and_', b'add', b'sub'}:
             assert len(tree) == 3
             return getattr(operator, op)(walk(tree[1]), walk(tree[2]))
         elif op == b'group':
             return walk(tree[1])
         elif op == b'ancestors':
             return getstack(walk(tree[1]))
         else:
             raise error.ProgrammingError(b'illegal tree: %r' % tree)
 
     return [prefetched[r] for r in walk(tree)]
 
 
 def getdescfromdrev(drev):
     """get description (commit message) from "Differential Revision"
 
     This is similar to differential.getcommitmessage API. But we only care
     about limited fields: title, summary, test plan, and URL.
     """
     title = drev[b'title']
     summary = drev[b'summary'].rstrip()
     testplan = drev[b'testPlan'].rstrip()
     if testplan:
         testplan = b'Test Plan:\n%s' % testplan
     uri = b'Differential Revision: %s' % drev[b'uri']
     return b'\n\n'.join(filter(None, [title, summary, testplan, uri]))
 
 
 def getdiffmeta(diff):
     """get commit metadata (date, node, user, p1) from a diff object
 
     The metadata could be "hg:meta", sent by phabsend, like:
 
         "properties": {
           "hg:meta": {
             "date": "1499571514 25200",
             "node": "98c08acae292b2faf60a279b4189beb6cff1414d",
             "user": "Foo Bar <[e-mail]>",
             "parent": "6d0abad76b30e4724a37ab8721d630394070fe16"
           }
         }
 
     Or converted from "local:commits", sent by "arc", like:
 
         "properties": {
           "local:commits": {
             "98c08acae292b2faf60a279b4189beb6cff1414d": {
               "author": "Foo Bar",
               "time": 1499546314,
               "branch": "default",
               "tag": "",
               "commit": "98c08acae292b2faf60a279b4189beb6cff1414d",
               "rev": "98c08acae292b2faf60a279b4189beb6cff1414d",
               "local": "1000",
               "parents": ["6d0abad76b30e4724a37ab8721d630394070fe16"],
               "summary": "...",
               "message": "...",
               "authorEmail": "[e-mail]"
             }
           }
         }
 
     Note: metadata extracted from "local:commits" will lose time zone
     information.
     """
     props = diff.get(b'properties') or {}
     meta = props.get(b'hg:meta')
     if not meta:
         if props.get(b'local:commits'):
             commit = sorted(props[b'local:commits'].values())[0]
             meta = {}
             if b'author' in commit and b'authorEmail' in commit:
                 meta[b'user'] = b'%s <%s>' % (
                     commit[b'author'],
                     commit[b'authorEmail'],
                 )
             if b'time' in commit:
                 meta[b'date'] = b'%d 0' % int(commit[b'time'])
             if b'branch' in commit:
                 meta[b'branch'] = commit[b'branch']
             node = commit.get(b'commit', commit.get(b'rev'))
             if node:
                 meta[b'node'] = node
             if len(commit.get(b'parents', ())) >= 1:
                 meta[b'parent'] = commit[b'parents'][0]
         else:
             meta = {}
     if b'date' not in meta and b'dateCreated' in diff:
         meta[b'date'] = b'%s 0' % diff[b'dateCreated']
     if b'branch' not in meta and diff.get(b'branch'):
         meta[b'branch'] = diff[b'branch']
     if b'parent' not in meta and diff.get(b'sourceControlBaseRevision'):
         meta[b'parent'] = diff[b'sourceControlBaseRevision']
     return meta
 
 
 def readpatch(repo, drevs, write):
     """generate plain-text patch readable by 'hg import'
 
     write is usually ui.write. drevs is what "querydrev" returns, results of
     "differential.query".
     """
     # Prefetch hg:meta property for all diffs
     diffids = sorted(set(max(int(v) for v in drev[b'diffs']) for drev in drevs))
     diffs = callconduit(repo.ui, b'differential.querydiffs', {b'ids': diffids})
 
     # Generate patch for each drev
     for drev in drevs:
         repo.ui.note(_(b'reading D%s\n') % drev[b'id'])
 
         diffid = max(int(v) for v in drev[b'diffs'])
         body = callconduit(
             repo.ui, b'differential.getrawdiff', {b'diffID': diffid}
         )
         desc = getdescfromdrev(drev)
         header = b'# HG changeset patch\n'
 
         # Try to preserve metadata from hg:meta property. Write hg patch
         # headers that can be read by the "import" command. See patchheadermap
         # and extract in mercurial/patch.py for supported headers.
         meta = getdiffmeta(diffs[b'%d' % diffid])
         for k in _metanamemap.keys():
             if k in meta:
                 header += b'# %s %s\n' % (_metanamemap[k], meta[k])
 
         content = b'%s%s\n%s' % (header, desc, body)
         write(content)
 
 
 @vcrcommand(
     b'phabread',
     [(b'', b'stack', False, _(b'read dependencies'))],
     _(b'DREVSPEC [OPTIONS]'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT,
 )
 def phabread(ui, repo, spec, **opts):
     """print patches from Phabricator suitable for importing
 
     DREVSPEC could be a Differential Revision identity, like ``D123``, or just
     the number ``123``. It could also have common operators like ``+``, ``-``,
     ``&``, ``(``, ``)`` for complex queries. Prefix ``:`` could be used to
     select a stack.
 
     ``abandoned``, ``accepted``, ``closed``, ``needsreview``, ``needsrevision``
     could be used to filter patches by status. For performance reason, they
     only represent a subset of non-status selections and cannot be used alone.
 
     For example, ``:D6+8-(2+D4)`` selects a stack up to D6, plus D8 and exclude
     D2 and D4. ``:D9 & needsreview`` selects "Needs Review" revisions in a
     stack up to D9.
 
     If --stack is given, follow dependencies information and read all patches.
     It is equivalent to the ``:`` operator.
     """
     opts = pycompat.byteskwargs(opts)
     if opts.get(b'stack'):
         spec = b':(%s)' % spec
     drevs = querydrev(repo, spec)
     readpatch(repo, drevs, ui.write)
 
 
 @vcrcommand(
     b'phabupdate',
     [
         (b'', b'accept', False, _(b'accept revisions')),
         (b'', b'reject', False, _(b'reject revisions')),
         (b'', b'abandon', False, _(b'abandon revisions')),
         (b'', b'reclaim', False, _(b'reclaim revisions')),
         (b'm', b'comment', b'', _(b'comment on the last revision')),
     ],
     _(b'DREVSPEC [OPTIONS]'),
     helpcategory=command.CATEGORY_IMPORT_EXPORT,
 )
 def phabupdate(ui, repo, spec, **opts):
     """update Differential Revision in batch
 
     DREVSPEC selects revisions. See :hg:`help phabread` for its usage.
     """
     opts = pycompat.byteskwargs(opts)
     flags = [n for n in b'accept reject abandon reclaim'.split() if opts.get(n)]
     if len(flags) > 1:
         raise error.Abort(_(b'%s cannot be used together') % b', '.join(flags))
 
     actions = []
     for f in flags:
         actions.append({b'type': f, b'value': True})
 
     drevs = querydrev(repo, spec)
     for i, drev in enumerate(drevs):
         if i + 1 == len(drevs) and opts.get(b'comment'):
             actions.append({b'type': b'comment', b'value': opts[b'comment']})
         if actions:
             params = {
                 b'objectIdentifier': drev[b'phid'],
                 b'transactions': actions,
             }
             callconduit(ui, b'differential.revision.edit', params)
 
 
 @eh.templatekeyword(b'phabreview', requires={b'ctx'})
 def template_review(context, mapping):
     """:phabreview: Object describing the review for this changeset.
     Has attributes `url` and `id`.
     """
     ctx = context.resource(mapping, b'ctx')
     m = _differentialrevisiondescre.search(ctx.description())
     if m:
         return templateutil.hybriddict(
             {b'url': m.group('url'), b'id': b"D%s" % m.group('id'),}
         )
     else:
         tags = ctx.repo().nodetags(ctx.node())
         for t in tags:
             if _differentialrevisiontagre.match(t):
                 url = ctx.repo().ui.config(b'phabricator', b'url')
                 if not url.endswith(b'/'):
                     url += b'/'
                 url += t
 
                 return templateutil.hybriddict({b'url': url, b'id': t,})
     return None
 
 
 @eh.templatekeyword(b'phabstatus', requires={b'ctx', b'repo', b'ui'})
 def template_status(context, mapping):
     """:phabstatus: String. Status of Phabricator differential.
     """
     ctx = context.resource(mapping, b'ctx')
     repo = context.resource(mapping, b'repo')
     ui = context.resource(mapping, b'ui')
 
     rev = ctx.rev()
     try:
         drevid = getdrevmap(repo, [rev])[rev]
     except KeyError:
         return None
     drevs = callconduit(ui, b'differential.query', {b'ids': [drevid]})
     for drev in drevs:
         if int(drev[b'id']) == drevid:
             return templateutil.hybriddict(
                 {b'url': drev[b'uri'], b'status': drev[b'statusName'],}
             )
     return None
 
 
 @show.showview(b'phabstatus', csettopic=b'work')
 def phabstatusshowview(ui, repo, displayer):
     """Phabricator differiential status"""
     revs = repo.revs('sort(_underway(), topo)')
     drevmap = getdrevmap(repo, revs)
     unknownrevs, drevids, revsbydrevid = [], set([]), {}
     for rev, drevid in pycompat.iteritems(drevmap):
         if drevid is not None:
             drevids.add(drevid)
             revsbydrevid.setdefault(drevid, set([])).add(rev)
         else:
             unknownrevs.append(rev)
 
     drevs = callconduit(ui, b'differential.query', {b'ids': list(drevids)})
     drevsbyrev = {}
     for drev in drevs:
         for rev in revsbydrevid[int(drev[b'id'])]:
             drevsbyrev[rev] = drev
 
     def phabstatus(ctx):
         drev = drevsbyrev[ctx.rev()]
         status = ui.label(
             b'%(statusName)s' % drev,
             b'phabricator.status.%s' % _getstatusname(drev),
         )
         ui.write(b"\n%s %s\n" % (drev[b'uri'], status))
 
     revs -= smartset.baseset(unknownrevs)
     revdag = graphmod.dagwalker(repo, revs)
 
     ui.setconfig(b'experimental', b'graphshorten', True)
     displayer._exthook = phabstatus
     nodelen = show.longestshortest(repo, revs)
     logcmdutil.displaygraph(
         ui,
         repo,
         revdag,
         displayer,
         graphmod.asciiedges,
         props={b'nodelen': nodelen},
     )

tests/test-phabricator.t

@@ -1,246 +1,246 b''
 #require vcr
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > phabricator = 
   > EOF
   $ hg init repo
   $ cd repo
   $ cat >> .hg/hgrc <<EOF
   > [phabricator]
   > url = https://phab.mercurial-scm.org/
   > callsign = HG
   > 
   > [auth]
   > hgphab.schemes = https
   > hgphab.prefix = phab.mercurial-scm.org
   > # When working on the extension and making phabricator interaction
   > # changes, edit this to be a real phabricator token. When done, edit
   > # it back. The VCR transcripts will be auto-sanitised to replace your real
   > # token with this value.
   > hgphab.phabtoken = cli-hahayouwish
   > EOF
   $ VCR="$TESTDIR/phabricator"
 
 Error is handled reasonably. We override the phabtoken here so that
 when you're developing changes to phabricator.py you can edit the
 above config and have a real token in the test but not have to edit
 this test.
   $ hg phabread --config auth.hgphab.phabtoken=cli-notavalidtoken \
   >  --test-vcr "$VCR/phabread-conduit-error.json" D4480 | head
   abort: Conduit Error (ERR-INVALID-AUTH): API token "cli-notavalidtoken" has the wrong length. API tokens should be 32 characters long.
 
 Basic phabread:
   $ hg phabread --test-vcr "$VCR/phabread-4480.json" D4480 | head
   # HG changeset patch
   # Date 1536771503 0
   # Parent  a5de21c9e3703f8e8eb064bd7d893ff2f703c66a
   exchangev2: start to implement pull with wire protocol v2
   
   Wire protocol version 2 will take a substantially different
   approach to exchange than version 1 (at least as far as pulling
   is concerned).
   
   This commit establishes a new exchangev2 module for holding
 
 phabupdate with an accept:
   $ hg phabupdate --accept D4564 \
   > -m 'I think I like where this is headed. Will read rest of series later.'\
   >  --test-vcr "$VCR/accept-4564.json"
   abort: Conduit Error (ERR-CONDUIT-CORE): Validation errors:
     - You can not accept this revision because it has already been closed. Only open revisions can be accepted.
   [255]
   $ hg phabupdate --accept D7913 -m 'LGTM' --test-vcr "$VCR/accept-7913.json"
 
 Create a differential diff:
   $ HGENCODING=utf-8; export HGENCODING
   $ echo alpha > alpha
   $ hg ci --addremove -m 'create alpha for phabricator test €'
   adding alpha
   $ hg phabsend -r . --test-vcr "$VCR/phabsend-create-alpha.json"
   D7915 - created - d386117f30e6: create alpha for phabricator test \xe2\x82\xac (esc)
   saved backup bundle to $TESTTMP/repo/.hg/strip-backup/d386117f30e6-24ffe649-phabsend.hg
   $ echo more >> alpha
   $ HGEDITOR=true hg ci --amend
   saved backup bundle to $TESTTMP/repo/.hg/strip-backup/347bf67801e5-3bf313e4-amend.hg
   $ echo beta > beta
   $ hg ci --addremove -m 'create beta for phabricator test'
   adding beta
   $ hg phabsend -r ".^::" --test-vcr "$VCR/phabsend-update-alpha-create-beta.json"
   D7915 - updated - c44b38f24a45: create alpha for phabricator test \xe2\x82\xac (esc)
   D7916 - created - 9e6901f21d5b: create beta for phabricator test
   saved backup bundle to $TESTTMP/repo/.hg/strip-backup/9e6901f21d5b-1fcd4f0e-phabsend.hg
   $ unset HGENCODING
 
 The amend won't explode after posting a public commit.  The local tag is left
 behind to identify it.
 
   $ echo 'public change' > beta
   $ hg ci -m 'create public change for phabricator testing'
   $ hg phase --public .
   $ echo 'draft change' > alpha
   $ hg ci -m 'create draft change for phabricator testing'
   $ hg phabsend --amend -r '.^::' --test-vcr "$VCR/phabsend-create-public.json"
   D7917 - created - 7b4185ab5d16: create public change for phabricator testing
   D7918 - created - 251c1c333fc6: create draft change for phabricator testing
   warning: not updating public commit 2:7b4185ab5d16
   saved backup bundle to $TESTTMP/repo/.hg/strip-backup/251c1c333fc6-41cb7c3b-phabsend.hg
   $ hg tags -v
   tip                                3:3244dc4a3334
   D7917                              2:7b4185ab5d16 local
 
   $ hg debugcallconduit user.search --test-vcr "$VCR/phab-conduit.json" <<EOF
   > {
   >     "constraints": {
   >         "isBot": true
   >     }
   > }
   > EOF
   {
     "cursor": {
       "after": null,
       "before": null,
       "limit": 100,
       "order": null
     },
     "data": [],
     "maps": {},
     "query": {
       "queryKey": null
     }
   }
 
 Template keywords
   $ hg log -T'{rev} {phabreview|json}\n'
   3 {"id": "D7918", "url": "https://phab.mercurial-scm.org/D7918"}
   2 {"id": "D7917", "url": "https://phab.mercurial-scm.org/D7917"}
   1 {"id": "D7916", "url": "https://phab.mercurial-scm.org/D7916"}
   0 {"id": "D7915", "url": "https://phab.mercurial-scm.org/D7915"}
 
   $ hg log -T'{rev} {if(phabreview, "{phabreview.url} {phabreview.id}")}\n'
   3 https://phab.mercurial-scm.org/D7918 D7918
   2 https://phab.mercurial-scm.org/D7917 D7917
   1 https://phab.mercurial-scm.org/D7916 D7916
   0 https://phab.mercurial-scm.org/D7915 D7915
 
 Commenting when phabsending:
   $ echo comment > comment
   $ hg ci --addremove -m "create comment for phabricator test"
   adding comment
   $ hg phabsend -r . -m "For default branch" --test-vcr "$VCR/phabsend-comment-created.json"
   D7919 - created - d5dddca9023d: create comment for phabricator test
   saved backup bundle to $TESTTMP/repo/.hg/strip-backup/d5dddca9023d-adf673ba-phabsend.hg
   $ echo comment2 >> comment
   $ hg ci --amend
   saved backup bundle to $TESTTMP/repo/.hg/strip-backup/f7db812bbe1d-8fcded77-amend.hg
   $ hg phabsend -r . -m "Address review comments" --test-vcr "$VCR/phabsend-comment-updated.json"
   D7919 - updated - 1849d7828727: create comment for phabricator test
 
 Phabsending a skipped commit:
   $ hg phabsend --no-amend -r . --test-vcr "$VCR/phabsend-skipped.json"
   D7919 - skipped - 1849d7828727: create comment for phabricator test
 
 Phabreading a DREV with a local:commits time as a string:
   $ hg phabread --test-vcr "$VCR/phabread-str-time.json" D1285
   # HG changeset patch
   # User Pulkit Goyal <[e-mail]>
   # Date 1509404054 -19800
   # Node ID 44fc1c1f1774a76423b9c732af6938435099bcc5
   # Parent  8feef8ef8389a3b544e0a74624f1efc3a8d85d35
   repoview: add a new attribute _visibilityexceptions and related API
   
   Currently we don't have a defined way in core to make some hidden revisions
   visible in filtered repo. Extensions to achieve the purpose of unhiding some
   hidden commits, wrap repoview.pinnedrevs() function.
   
   To make the above task simple and have well defined API, this patch adds a new
   attribute '_visibilityexceptions' to repoview class which will contains
   the hidden revs which should be exception.
   This will allow to set different exceptions for different repoview objects
   backed by the same unfiltered repo.
   
   This patch also adds API to add revs to the attribute set and get them.
   
   Thanks to Jun for suggesting the use of repoview class instead of localrepo.
   
   Differential Revision: https://phab.mercurial-scm.org/D1285
   diff --git a/mercurial/repoview.py b/mercurial/repoview.py
   --- a/mercurial/repoview.py
   +++ b/mercurial/repoview.py
   @@ * @@ (glob)
        subclasses of `localrepo`. Eg: `bundlerepo` or `statichttprepo`.
        """
    
   +    # hidden revs which should be visible
   +    _visibilityexceptions = set()
   +
        def __init__(self, repo, filtername):
            object.__setattr__(self, r'_unfilteredrepo', repo)
            object.__setattr__(self, r'filtername', filtername)
   @@ -231,6 +234,14 @@
                return self
            return self.unfiltered().filtered(name)
    
   +    def addvisibilityexceptions(self, revs):
   +        """adds hidden revs which should be visible to set of exceptions"""
   +        self._visibilityexceptions.update(revs)
   +
   +    def getvisibilityexceptions(self):
   +        """returns the set of hidden revs which should be visible"""
   +        return self._visibilityexceptions
   +
        # everything access are forwarded to the proxied repo
        def __getattr__(self, attr):
            return getattr(self._unfilteredrepo, attr)
   diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
   --- a/mercurial/localrepo.py
   +++ b/mercurial/localrepo.py
   @@ -570,6 +570,14 @@
        def close(self):
            self._writecaches()
    
   +    def addvisibilityexceptions(self, exceptions):
   +        # should be called on a filtered repository
   +        pass
   +
   +    def getvisibilityexceptions(self):
   +        # should be called on a filtered repository
   +        return set()
   +
        def _loadextensions(self):
            extensions.loadall(self.ui)
    
   
 A bad .arcconfig doesn't error out
   $ echo 'garbage' > .arcconfig
   $ hg config phabricator --debug
   invalid JSON in $TESTTMP/repo/.arcconfig
   read config from: */.hgrc (glob)
   $TESTTMP/repo/.hg/hgrc:*: phabricator.url=https://phab.mercurial-scm.org/ (glob)
   $TESTTMP/repo/.hg/hgrc:*: phabricator.callsign=HG (glob)
 
 The .arcconfig content overrides global config
   $ cat >> $HGRCPATH << EOF
   > [phabricator]
   > url = global
   > callsign = global
   > EOF
   $ cp $TESTDIR/../.arcconfig .
   $ mv .hg/hgrc .hg/hgrc.bak
   $ hg config phabricator --debug
   read config from: */.hgrc (glob)
-  */.hgrc:*: phabricator.url=global (glob)
   $TESTTMP/repo/.arcconfig: phabricator.callsign=HG
+  $TESTTMP/repo/.arcconfig: phabricator.url=https://phab.mercurial-scm.org/
 
 But it doesn't override local config
   $ cat >> .hg/hgrc << EOF
   > [phabricator]
   > url = local
   > callsign = local
   > EOF
   $ hg config phabricator --debug
   read config from: */.hgrc (glob)
   $TESTTMP/repo/.hg/hgrc:*: phabricator.url=local (glob)
   $TESTTMP/repo/.hg/hgrc:*: phabricator.callsign=local (glob)
   $ mv .hg/hgrc.bak .hg/hgrc
 
   $ cd ..