templatekw: make negrev return empty for wdir() and nullrev

I considered just returning the same output that {rev} returns here,
but {rev} also returns essentially gibberish: either an INT_MAX-kind
of variable for wdir() or -1 for null. Since these are numbers that
are intended to be used for calculations, and since the numbers for
wdir() and -1 are not really very helpful for calculation (and worse,
when used as a revision number -1 is equal to unhidden tip), I figured
the most reasonable thing to do here is to just return nothing for
negrev.

This could potentially break scripts that are expecting to parse a
nonempty integer out of a {negrev}, but that seems like a very remote
concern at this juncture.

mercurial/templatekw.py

@@ -1,892 +1,895
 # templatekw.py - common changeset template keywords
 #
 # Copyright 2005-2009 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 from .i18n import _
 from .node import (
     hex,
     nullid,
     wdirid,
     wdirrev,
 )
 
 from . import (
     diffutil,
     encoding,
     error,
     hbisect,
     i18n,
     obsutil,
     patch,
     pycompat,
     registrar,
     scmutil,
     templateutil,
     util,
 )
 from .utils import (
     stringutil,
 )
 
 _hybrid = templateutil.hybrid
 hybriddict = templateutil.hybriddict
 hybridlist = templateutil.hybridlist
 compatdict = templateutil.compatdict
 compatlist = templateutil.compatlist
 _showcompatlist = templateutil._showcompatlist
 
 def getlatesttags(context, mapping, pattern=None):
     '''return date, distance and name for the latest tag of rev'''
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
     cache = context.resource(mapping, 'cache')
 
     cachename = 'latesttags'
     if pattern is not None:
         cachename += '-' + pattern
         match = stringutil.stringmatcher(pattern)[2]
     else:
         match = util.always
 
     if cachename not in cache:
         # Cache mapping from rev to a tuple with tag date, tag
         # distance and tag name
         cache[cachename] = {-1: (0, 0, ['null'])}
     latesttags = cache[cachename]
 
     rev = ctx.rev()
     todo = [rev]
     while todo:
         rev = todo.pop()
         if rev in latesttags:
             continue
         ctx = repo[rev]
         tags = [t for t in ctx.tags()
                 if (repo.tagtype(t) and repo.tagtype(t) != 'local'
                     and match(t))]
         if tags:
             latesttags[rev] = ctx.date()[0], 0, [t for t in sorted(tags)]
             continue
         try:
             ptags = [latesttags[p.rev()] for p in ctx.parents()]
             if len(ptags) > 1:
                 if ptags[0][2] == ptags[1][2]:
                     # The tuples are laid out so the right one can be found by
                     # comparison in this case.
                     pdate, pdist, ptag = max(ptags)
                 else:
                     def key(x):
                         tag = x[2][0]
                         if ctx.rev() is None:
                             # only() doesn't support wdir
                             prevs = [c.rev() for c in ctx.parents()]
                             changes = repo.revs('only(%ld, %s)', prevs, tag)
                             changessincetag = len(changes) + 1
                         else:
                             changes = repo.revs('only(%d, %s)', ctx.rev(), tag)
                             changessincetag = len(changes)
                         # Smallest number of changes since tag wins. Date is
                         # used as tiebreaker.
                         return [-changessincetag, x[0]]
                     pdate, pdist, ptag = max(ptags, key=key)
             else:
                 pdate, pdist, ptag = ptags[0]
         except KeyError:
             # Cache miss - recurse
             todo.append(rev)
             todo.extend(p.rev() for p in ctx.parents())
             continue
         latesttags[rev] = pdate, pdist + 1, ptag
     return latesttags[rev]
 
 def getrenamedfn(repo, endrev=None):
     rcache = {}
     if endrev is None:
         endrev = len(repo)
 
     def getrenamed(fn, rev):
         '''looks up all renames for a file (up to endrev) the first
         time the file is given. It indexes on the changerev and only
         parses the manifest if linkrev != changerev.
         Returns rename info for fn at changerev rev.'''
         if fn not in rcache:
             rcache[fn] = {}
             fl = repo.file(fn)
             for i in fl:
                 lr = fl.linkrev(i)
                 renamed = fl.renamed(fl.node(i))
                 rcache[fn][lr] = renamed and renamed[0]
                 if lr >= endrev:
                     break
         if rev in rcache[fn]:
             return rcache[fn][rev]
 
         # If linkrev != rev (i.e. rev not found in rcache) fallback to
         # filectx logic.
         try:
             renamed = repo[rev][fn].renamed()
             return renamed and renamed[0]
         except error.LookupError:
             return None
 
     return getrenamed
 
 def getlogcolumns():
     """Return a dict of log column labels"""
     _ = pycompat.identity  # temporarily disable gettext
     # i18n: column positioning for "hg log"
     columns = _('bookmark:    %s\n'
                 'branch:      %s\n'
                 'changeset:   %s\n'
                 'copies:      %s\n'
                 'date:        %s\n'
                 'extra:       %s=%s\n'
                 'files+:      %s\n'
                 'files-:      %s\n'
                 'files:       %s\n'
                 'instability: %s\n'
                 'manifest:    %s\n'
                 'obsolete:    %s\n'
                 'parent:      %s\n'
                 'phase:       %s\n'
                 'summary:     %s\n'
                 'tag:         %s\n'
                 'user:        %s\n')
     return dict(zip([s.split(':', 1)[0] for s in columns.splitlines()],
                     i18n._(columns).splitlines(True)))
 
 # basic internal templates
 _changeidtmpl = '{rev}:{node|formatnode}'
 
 # default templates internally used for rendering of lists
 defaulttempl = {
     'parent': _changeidtmpl + ' ',
     'manifest': _changeidtmpl,
     'file_copy': '{name} ({source})',
     'envvar': '{key}={value}',
     'extra': '{key}={value|stringescape}'
 }
 # filecopy is preserved for compatibility reasons
 defaulttempl['filecopy'] = defaulttempl['file_copy']
 
 # keywords are callables (see registrar.templatekeyword for details)
 keywords = {}
 templatekeyword = registrar.templatekeyword(keywords)
 
 @templatekeyword('author', requires={'ctx'})
 def showauthor(context, mapping):
     """Alias for ``{user}``"""
     return showuser(context, mapping)
 
 @templatekeyword('bisect', requires={'repo', 'ctx'})
 def showbisect(context, mapping):
     """String. The changeset bisection status."""
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
     return hbisect.label(repo, ctx.node())
 
 @templatekeyword('branch', requires={'ctx'})
 def showbranch(context, mapping):
     """String. The name of the branch on which the changeset was
     committed.
     """
     ctx = context.resource(mapping, 'ctx')
     return ctx.branch()
 
 @templatekeyword('branches', requires={'ctx'})
 def showbranches(context, mapping):
     """List of strings. The name of the branch on which the
     changeset was committed. Will be empty if the branch name was
     default. (DEPRECATED)
     """
     ctx = context.resource(mapping, 'ctx')
     branch = ctx.branch()
     if branch != 'default':
         return compatlist(context, mapping, 'branch', [branch],
                           plural='branches')
     return compatlist(context, mapping, 'branch', [], plural='branches')
 
 @templatekeyword('bookmarks', requires={'repo', 'ctx'})
 def showbookmarks(context, mapping):
     """List of strings. Any bookmarks associated with the
     changeset. Also sets 'active', the name of the active bookmark.
     """
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
     bookmarks = ctx.bookmarks()
     active = repo._activebookmark
     makemap = lambda v: {'bookmark': v, 'active': active, 'current': active}
     f = _showcompatlist(context, mapping, 'bookmark', bookmarks)
     return _hybrid(f, bookmarks, makemap, pycompat.identity)
 
 @templatekeyword('children', requires={'ctx'})
 def showchildren(context, mapping):
     """List of strings. The children of the changeset."""
     ctx = context.resource(mapping, 'ctx')
     childrevs = ['%d:%s' % (cctx.rev(), cctx) for cctx in ctx.children()]
     return compatlist(context, mapping, 'children', childrevs, element='child')
 
 # Deprecated, but kept alive for help generation a purpose.
 @templatekeyword('currentbookmark', requires={'repo', 'ctx'})
 def showcurrentbookmark(context, mapping):
     """String. The active bookmark, if it is associated with the changeset.
     (DEPRECATED)"""
     return showactivebookmark(context, mapping)
 
 @templatekeyword('activebookmark', requires={'repo', 'ctx'})
 def showactivebookmark(context, mapping):
     """String. The active bookmark, if it is associated with the changeset."""
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
     active = repo._activebookmark
     if active and active in ctx.bookmarks():
         return active
     return ''
 
 @templatekeyword('date', requires={'ctx'})
 def showdate(context, mapping):
     """Date information. The date when the changeset was committed."""
     ctx = context.resource(mapping, 'ctx')
     # the default string format is '<float(unixtime)><tzoffset>' because
     # python-hglib splits date at decimal separator.
     return templateutil.date(ctx.date(), showfmt='%d.0%d')
 
 @templatekeyword('desc', requires={'ctx'})
 def showdescription(context, mapping):
     """String. The text of the changeset description."""
     ctx = context.resource(mapping, 'ctx')
     s = ctx.description()
     if isinstance(s, encoding.localstr):
         # try hard to preserve utf-8 bytes
         return encoding.tolocal(encoding.fromlocal(s).strip())
     elif isinstance(s, encoding.safelocalstr):
         return encoding.safelocalstr(s.strip())
     else:
         return s.strip()
 
 @templatekeyword('diffstat', requires={'ui', 'ctx'})
 def showdiffstat(context, mapping):
     """String. Statistics of changes with the following format:
     "modified files: +added/-removed lines"
     """
     ui = context.resource(mapping, 'ui')
     ctx = context.resource(mapping, 'ctx')
     diffopts = diffutil.diffallopts(ui, {'noprefix': False})
     diff = ctx.diff(opts=diffopts)
     stats = patch.diffstatdata(util.iterlines(diff))
     maxname, maxtotal, adds, removes, binary = patch.diffstatsum(stats)
     return '%d: +%d/-%d' % (len(stats), adds, removes)
 
 @templatekeyword('envvars', requires={'ui'})
 def showenvvars(context, mapping):
     """A dictionary of environment variables. (EXPERIMENTAL)"""
     ui = context.resource(mapping, 'ui')
     env = ui.exportableenviron()
     env = util.sortdict((k, env[k]) for k in sorted(env))
     return compatdict(context, mapping, 'envvar', env, plural='envvars')
 
 @templatekeyword('extras', requires={'ctx'})
 def showextras(context, mapping):
     """List of dicts with key, value entries of the 'extras'
     field of this changeset."""
     ctx = context.resource(mapping, 'ctx')
     extras = ctx.extra()
     extras = util.sortdict((k, extras[k]) for k in sorted(extras))
     makemap = lambda k: {'key': k, 'value': extras[k]}
     c = [makemap(k) for k in extras]
     f = _showcompatlist(context, mapping, 'extra', c, plural='extras')
     return _hybrid(f, extras, makemap,
                    lambda k: '%s=%s' % (k, stringutil.escapestr(extras[k])))
 
 def _getfilestatus(context, mapping, listall=False):
     ctx = context.resource(mapping, 'ctx')
     revcache = context.resource(mapping, 'revcache')
     if 'filestatus' not in revcache or revcache['filestatusall'] < listall:
         stat = ctx.p1().status(ctx, listignored=listall, listclean=listall,
                                listunknown=listall)
         revcache['filestatus'] = stat
         revcache['filestatusall'] = listall
     return revcache['filestatus']
 
 def _getfilestatusmap(context, mapping, listall=False):
     revcache = context.resource(mapping, 'revcache')
     if 'filestatusmap' not in revcache or revcache['filestatusall'] < listall:
         stat = _getfilestatus(context, mapping, listall=listall)
         revcache['filestatusmap'] = statmap = {}
         for char, files in zip(pycompat.iterbytestr('MAR!?IC'), stat):
             statmap.update((f, char) for f in files)
     return revcache['filestatusmap']  # {path: statchar}
 
 def _showfilesbystat(context, mapping, name, index):
     stat = _getfilestatus(context, mapping)
     files = stat[index]
     return templateutil.compatfileslist(context, mapping, name, files)
 
 @templatekeyword('file_adds', requires={'ctx', 'revcache'})
 def showfileadds(context, mapping):
     """List of strings. Files added by this changeset."""
     return _showfilesbystat(context, mapping, 'file_add', 1)
 
 @templatekeyword('file_copies',
                  requires={'repo', 'ctx', 'cache', 'revcache'})
 def showfilecopies(context, mapping):
     """List of strings. Files copied in this changeset with
     their sources.
     """
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
     cache = context.resource(mapping, 'cache')
     copies = context.resource(mapping, 'revcache').get('copies')
     if copies is None:
         if 'getrenamed' not in cache:
             cache['getrenamed'] = getrenamedfn(repo)
         copies = []
         getrenamed = cache['getrenamed']
         for fn in ctx.files():
             rename = getrenamed(fn, ctx.rev())
             if rename:
                 copies.append((fn, rename))
     return templateutil.compatfilecopiesdict(context, mapping, 'file_copy',
                                              copies)
 
 # showfilecopiesswitch() displays file copies only if copy records are
 # provided before calling the templater, usually with a --copies
 # command line switch.
 @templatekeyword('file_copies_switch', requires={'revcache'})
 def showfilecopiesswitch(context, mapping):
     """List of strings. Like "file_copies" but displayed
     only if the --copied switch is set.
     """
     copies = context.resource(mapping, 'revcache').get('copies') or []
     return templateutil.compatfilecopiesdict(context, mapping, 'file_copy',
                                              copies)
 
 @templatekeyword('file_dels', requires={'ctx', 'revcache'})
 def showfiledels(context, mapping):
     """List of strings. Files removed by this changeset."""
     return _showfilesbystat(context, mapping, 'file_del', 2)
 
 @templatekeyword('file_mods', requires={'ctx', 'revcache'})
 def showfilemods(context, mapping):
     """List of strings. Files modified by this changeset."""
     return _showfilesbystat(context, mapping, 'file_mod', 0)
 
 @templatekeyword('files', requires={'ctx'})
 def showfiles(context, mapping):
     """List of strings. All files modified, added, or removed by this
     changeset.
     """
     ctx = context.resource(mapping, 'ctx')
     return templateutil.compatfileslist(context, mapping, 'file', ctx.files())
 
 @templatekeyword('graphnode', requires={'repo', 'ctx'})
 def showgraphnode(context, mapping):
     """String. The character representing the changeset node in an ASCII
     revision graph."""
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
     return getgraphnode(repo, ctx)
 
 def getgraphnode(repo, ctx):
     return getgraphnodecurrent(repo, ctx) or getgraphnodesymbol(ctx)
 
 def getgraphnodecurrent(repo, ctx):
     wpnodes = repo.dirstate.parents()
     if wpnodes[1] == nullid:
         wpnodes = wpnodes[:1]
     if ctx.node() in wpnodes:
         return '@'
     else:
         return ''
 
 def getgraphnodesymbol(ctx):
     if ctx.obsolete():
         return 'x'
     elif ctx.isunstable():
         return '*'
     elif ctx.closesbranch():
         return '_'
     else:
         return 'o'
 
 @templatekeyword('graphwidth', requires=())
 def showgraphwidth(context, mapping):
     """Integer. The width of the graph drawn by 'log --graph' or zero."""
     # just hosts documentation; should be overridden by template mapping
     return 0
 
 @templatekeyword('index', requires=())
 def showindex(context, mapping):
     """Integer. The current iteration of the loop. (0 indexed)"""
     # just hosts documentation; should be overridden by template mapping
     raise error.Abort(_("can't use index in this context"))
 
 @templatekeyword('latesttag', requires={'repo', 'ctx', 'cache'})
 def showlatesttag(context, mapping):
     """List of strings. The global tags on the most recent globally
     tagged ancestor of this changeset.  If no such tags exist, the list
     consists of the single string "null".
     """
     return showlatesttags(context, mapping, None)
 
 def showlatesttags(context, mapping, pattern):
     """helper method for the latesttag keyword and function"""
     latesttags = getlatesttags(context, mapping, pattern)
 
     # latesttag[0] is an implementation detail for sorting csets on different
     # branches in a stable manner- it is the date the tagged cset was created,
     # not the date the tag was created.  Therefore it isn't made visible here.
     makemap = lambda v: {
         'changes': _showchangessincetag,
         'distance': latesttags[1],
         'latesttag': v,   # BC with {latesttag % '{latesttag}'}
         'tag': v
     }
 
     tags = latesttags[2]
     f = _showcompatlist(context, mapping, 'latesttag', tags, separator=':')
     return _hybrid(f, tags, makemap, pycompat.identity)
 
 @templatekeyword('latesttagdistance', requires={'repo', 'ctx', 'cache'})
 def showlatesttagdistance(context, mapping):
     """Integer. Longest path to the latest tag."""
     return getlatesttags(context, mapping)[1]
 
 @templatekeyword('changessincelatesttag', requires={'repo', 'ctx', 'cache'})
 def showchangessincelatesttag(context, mapping):
     """Integer. All ancestors not in the latest tag."""
     tag = getlatesttags(context, mapping)[2][0]
     mapping = context.overlaymap(mapping, {'tag': tag})
     return _showchangessincetag(context, mapping)
 
 def _showchangessincetag(context, mapping):
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
     offset = 0
     revs = [ctx.rev()]
     tag = context.symbol(mapping, 'tag')
 
     # The only() revset doesn't currently support wdir()
     if ctx.rev() is None:
         offset = 1
         revs = [p.rev() for p in ctx.parents()]
 
     return len(repo.revs('only(%ld, %s)', revs, tag)) + offset
 
 # teach templater latesttags.changes is switched to (context, mapping) API
 _showchangessincetag._requires = {'repo', 'ctx'}
 
 @templatekeyword('manifest', requires={'repo', 'ctx'})
 def showmanifest(context, mapping):
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
     mnode = ctx.manifestnode()
     if mnode is None:
         mnode = wdirid
         mrev = wdirrev
     else:
         mrev = repo.manifestlog.rev(mnode)
     mhex = hex(mnode)
     mapping = context.overlaymap(mapping, {'rev': mrev, 'node': mhex})
     f = context.process('manifest', mapping)
     return templateutil.hybriditem(f, None, f,
                                    lambda x: {'rev': mrev, 'node': mhex})
 
 @templatekeyword('obsfate', requires={'ui', 'repo', 'ctx'})
 def showobsfate(context, mapping):
     # this function returns a list containing pre-formatted obsfate strings.
     #
     # This function will be replaced by templates fragments when we will have
     # the verbosity templatekw available.
     succsandmarkers = showsuccsandmarkers(context, mapping)
 
     ui = context.resource(mapping, 'ui')
     repo = context.resource(mapping, 'repo')
     values = []
 
     for x in succsandmarkers.tovalue(context, mapping):
         v = obsutil.obsfateprinter(ui, repo, x['successors'], x['markers'],
                                    scmutil.formatchangeid)
         values.append(v)
 
     return compatlist(context, mapping, "fate", values)
 
 def shownames(context, mapping, namespace):
     """helper method to generate a template keyword for a namespace"""
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
     ns = repo.names[namespace]
     names = ns.names(repo, ctx.node())
     return compatlist(context, mapping, ns.templatename, names,
                       plural=namespace)
 
 @templatekeyword('namespaces', requires={'repo', 'ctx'})
 def shownamespaces(context, mapping):
     """Dict of lists. Names attached to this changeset per
     namespace."""
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
 
     namespaces = util.sortdict()
     def makensmapfn(ns):
         # 'name' for iterating over namespaces, templatename for local reference
         return lambda v: {'name': v, ns.templatename: v}
 
     for k, ns in repo.names.iteritems():
         names = ns.names(repo, ctx.node())
         f = _showcompatlist(context, mapping, 'name', names)
         namespaces[k] = _hybrid(f, names, makensmapfn(ns), pycompat.identity)
 
     f = _showcompatlist(context, mapping, 'namespace', list(namespaces))
 
     def makemap(ns):
         return {
             'namespace': ns,
             'names': namespaces[ns],
             'builtin': repo.names[ns].builtin,
             'colorname': repo.names[ns].colorname,
         }
 
     return _hybrid(f, namespaces, makemap, pycompat.identity)
 
 @templatekeyword('negrev', requires={'repo', 'ctx'})
 def shownegrev(context, mapping):
     """Integer. The repository-local changeset negative revision number,
     which counts in the opposite direction."""
     ctx = context.resource(mapping, 'ctx')
+    rev = ctx.rev()
+    if rev is None or rev < 0:  # wdir() or nullrev?
+        return None
     repo = context.resource(mapping, 'repo')
-    return scmutil.intrev(ctx) - len(repo)
+    return rev - len(repo)
 
 @templatekeyword('node', requires={'ctx'})
 def shownode(context, mapping):
     """String. The changeset identification hash, as a 40 hexadecimal
     digit string.
     """
     ctx = context.resource(mapping, 'ctx')
     return ctx.hex()
 
 @templatekeyword('obsolete', requires={'ctx'})
 def showobsolete(context, mapping):
     """String. Whether the changeset is obsolete. (EXPERIMENTAL)"""
     ctx = context.resource(mapping, 'ctx')
     if ctx.obsolete():
         return 'obsolete'
     return ''
 
 @templatekeyword('path', requires={'fctx'})
 def showpath(context, mapping):
     """String. Repository-absolute path of the current file. (EXPERIMENTAL)"""
     fctx = context.resource(mapping, 'fctx')
     return fctx.path()
 
 @templatekeyword('peerurls', requires={'repo'})
 def showpeerurls(context, mapping):
     """A dictionary of repository locations defined in the [paths] section
     of your configuration file."""
     repo = context.resource(mapping, 'repo')
     # see commands.paths() for naming of dictionary keys
     paths = repo.ui.paths
     urls = util.sortdict((k, p.rawloc) for k, p in sorted(paths.iteritems()))
     def makemap(k):
         p = paths[k]
         d = {'name': k, 'url': p.rawloc}
         d.update((o, v) for o, v in sorted(p.suboptions.iteritems()))
         return d
     return _hybrid(None, urls, makemap, lambda k: '%s=%s' % (k, urls[k]))
 
 @templatekeyword("predecessors", requires={'repo', 'ctx'})
 def showpredecessors(context, mapping):
     """Returns the list of the closest visible successors. (EXPERIMENTAL)"""
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
     predecessors = sorted(obsutil.closestpredecessors(repo, ctx.node()))
     predecessors = pycompat.maplist(hex, predecessors)
 
     return _hybrid(None, predecessors,
                    lambda x: {'ctx': repo[x]},
                    lambda x: scmutil.formatchangeid(repo[x]))
 
 @templatekeyword('reporoot', requires={'repo'})
 def showreporoot(context, mapping):
     """String. The root directory of the current repository."""
     repo = context.resource(mapping, 'repo')
     return repo.root
 
 @templatekeyword('size', requires={'fctx'})
 def showsize(context, mapping):
     """Integer. Size of the current file in bytes. (EXPERIMENTAL)"""
     fctx = context.resource(mapping, 'fctx')
     return fctx.size()
 
 # requires 'fctx' to denote {status} depends on (ctx, path) pair
 @templatekeyword('status', requires={'ctx', 'fctx', 'revcache'})
 def showstatus(context, mapping):
     """String. Status code of the current file. (EXPERIMENTAL)"""
     path = templateutil.runsymbol(context, mapping, 'path')
     path = templateutil.stringify(context, mapping, path)
     if not path:
         return
     statmap = _getfilestatusmap(context, mapping)
     if path not in statmap:
         statmap = _getfilestatusmap(context, mapping, listall=True)
     return statmap.get(path)
 
 @templatekeyword("successorssets", requires={'repo', 'ctx'})
 def showsuccessorssets(context, mapping):
     """Returns a string of sets of successors for a changectx. Format used
     is: [ctx1, ctx2], [ctx3] if ctx has been split into ctx1 and ctx2
     while also diverged into ctx3. (EXPERIMENTAL)"""
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
     if not ctx.obsolete():
         return ''
 
     ssets = obsutil.successorssets(repo, ctx.node(), closest=True)
     ssets = [[hex(n) for n in ss] for ss in ssets]
 
     data = []
     for ss in ssets:
         h = _hybrid(None, ss, lambda x: {'ctx': repo[x]},
                     lambda x: scmutil.formatchangeid(repo[x]))
         data.append(h)
 
     # Format the successorssets
     def render(d):
         return templateutil.stringify(context, mapping, d)
 
     def gen(data):
         yield "; ".join(render(d) for d in data)
 
     return _hybrid(gen(data), data, lambda x: {'successorset': x},
                    pycompat.identity)
 
 @templatekeyword("succsandmarkers", requires={'repo', 'ctx'})
 def showsuccsandmarkers(context, mapping):
     """Returns a list of dict for each final successor of ctx. The dict
     contains successors node id in "successors" keys and the list of
     obs-markers from ctx to the set of successors in "markers".
     (EXPERIMENTAL)
     """
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
 
     values = obsutil.successorsandmarkers(repo, ctx)
 
     if values is None:
         values = []
 
     # Format successors and markers to avoid exposing binary to templates
     data = []
     for i in values:
         # Format successors
         successors = i['successors']
 
         successors = [hex(n) for n in successors]
         successors = _hybrid(None, successors,
                              lambda x: {'ctx': repo[x]},
                              lambda x: scmutil.formatchangeid(repo[x]))
 
         # Format markers
         finalmarkers = []
         for m in i['markers']:
             hexprec = hex(m[0])
             hexsucs = tuple(hex(n) for n in m[1])
             hexparents = None
             if m[5] is not None:
                 hexparents = tuple(hex(n) for n in m[5])
             newmarker = (hexprec, hexsucs) + m[2:5] + (hexparents,) + m[6:]
             finalmarkers.append(newmarker)
 
         data.append({'successors': successors, 'markers': finalmarkers})
 
     return templateutil.mappinglist(data)
 
 @templatekeyword('p1', requires={'ctx'})
 def showp1(context, mapping):
     """Changeset. The changeset's first parent. ``{p1.rev}`` for the revision
     number, and ``{p1.node}`` for the identification hash."""
     ctx = context.resource(mapping, 'ctx')
     return templateutil.mappingdict({'ctx': ctx.p1()}, tmpl=_changeidtmpl)
 
 @templatekeyword('p2', requires={'ctx'})
 def showp2(context, mapping):
     """Changeset. The changeset's second parent. ``{p2.rev}`` for the revision
     number, and ``{p2.node}`` for the identification hash."""
     ctx = context.resource(mapping, 'ctx')
     return templateutil.mappingdict({'ctx': ctx.p2()}, tmpl=_changeidtmpl)
 
 @templatekeyword('p1rev', requires={'ctx'})
 def showp1rev(context, mapping):
     """Integer. The repository-local revision number of the changeset's
     first parent, or -1 if the changeset has no parents. (DEPRECATED)"""
     ctx = context.resource(mapping, 'ctx')
     return ctx.p1().rev()
 
 @templatekeyword('p2rev', requires={'ctx'})
 def showp2rev(context, mapping):
     """Integer. The repository-local revision number of the changeset's
     second parent, or -1 if the changeset has no second parent. (DEPRECATED)"""
     ctx = context.resource(mapping, 'ctx')
     return ctx.p2().rev()
 
 @templatekeyword('p1node', requires={'ctx'})
 def showp1node(context, mapping):
     """String. The identification hash of the changeset's first parent,
     as a 40 digit hexadecimal string. If the changeset has no parents, all
     digits are 0. (DEPRECATED)"""
     ctx = context.resource(mapping, 'ctx')
     return ctx.p1().hex()
 
 @templatekeyword('p2node', requires={'ctx'})
 def showp2node(context, mapping):
     """String. The identification hash of the changeset's second
     parent, as a 40 digit hexadecimal string. If the changeset has no second
     parent, all digits are 0. (DEPRECATED)"""
     ctx = context.resource(mapping, 'ctx')
     return ctx.p2().hex()
 
 @templatekeyword('parents', requires={'repo', 'ctx'})
 def showparents(context, mapping):
     """List of strings. The parents of the changeset in "rev:node"
     format. If the changeset has only one "natural" parent (the predecessor
     revision) nothing is shown."""
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
     pctxs = scmutil.meaningfulparents(repo, ctx)
     prevs = [p.rev() for p in pctxs]
     parents = [[('rev', p.rev()),
                 ('node', p.hex()),
                 ('phase', p.phasestr())]
                for p in pctxs]
     f = _showcompatlist(context, mapping, 'parent', parents)
     return _hybrid(f, prevs, lambda x: {'ctx': repo[x]},
                    lambda x: scmutil.formatchangeid(repo[x]), keytype=int)
 
 @templatekeyword('phase', requires={'ctx'})
 def showphase(context, mapping):
     """String. The changeset phase name."""
     ctx = context.resource(mapping, 'ctx')
     return ctx.phasestr()
 
 @templatekeyword('phaseidx', requires={'ctx'})
 def showphaseidx(context, mapping):
     """Integer. The changeset phase index. (ADVANCED)"""
     ctx = context.resource(mapping, 'ctx')
     return ctx.phase()
 
 @templatekeyword('rev', requires={'ctx'})
 def showrev(context, mapping):
     """Integer. The repository-local changeset revision number."""
     ctx = context.resource(mapping, 'ctx')
     return scmutil.intrev(ctx)
 
 def showrevslist(context, mapping, name, revs):
     """helper to generate a list of revisions in which a mapped template will
     be evaluated"""
     repo = context.resource(mapping, 'repo')
     # revs may be a smartset; don't compute it until f() has to be evaluated
     def f():
         srevs = ['%d' % r for r in revs]
         return _showcompatlist(context, mapping, name, srevs)
     return _hybrid(f, revs,
                    lambda x: {name: x, 'ctx': repo[x]},
                    pycompat.identity, keytype=int)
 
 @templatekeyword('subrepos', requires={'ctx'})
 def showsubrepos(context, mapping):
     """List of strings. Updated subrepositories in the changeset."""
     ctx = context.resource(mapping, 'ctx')
     substate = ctx.substate
     if not substate:
         return compatlist(context, mapping, 'subrepo', [])
     psubstate = ctx.p1().substate or {}
     subrepos = []
     for sub in substate:
         if sub not in psubstate or substate[sub] != psubstate[sub]:
             subrepos.append(sub) # modified or newly added in ctx
     for sub in psubstate:
         if sub not in substate:
             subrepos.append(sub) # removed in ctx
     return compatlist(context, mapping, 'subrepo', sorted(subrepos))
 
 # don't remove "showtags" definition, even though namespaces will put
 # a helper function for "tags" keyword into "keywords" map automatically,
 # because online help text is built without namespaces initialization
 @templatekeyword('tags', requires={'repo', 'ctx'})
 def showtags(context, mapping):
     """List of strings. Any tags associated with the changeset."""
     return shownames(context, mapping, 'tags')
 
 @templatekeyword('termwidth', requires={'ui'})
 def showtermwidth(context, mapping):
     """Integer. The width of the current terminal."""
     ui = context.resource(mapping, 'ui')
     return ui.termwidth()
 
 @templatekeyword('user', requires={'ctx'})
 def showuser(context, mapping):
     """String. The unmodified author of the changeset."""
     ctx = context.resource(mapping, 'ctx')
     return ctx.user()
 
 @templatekeyword('instabilities', requires={'ctx'})
 def showinstabilities(context, mapping):
     """List of strings. Evolution instabilities affecting the changeset.
     (EXPERIMENTAL)
     """
     ctx = context.resource(mapping, 'ctx')
     return compatlist(context, mapping, 'instability', ctx.instabilities(),
                       plural='instabilities')
 
 @templatekeyword('verbosity', requires={'ui'})
 def showverbosity(context, mapping):
     """String. The current output verbosity in 'debug', 'quiet', 'verbose',
     or ''."""
     ui = context.resource(mapping, 'ui')
     # see logcmdutil.changesettemplater for priority of these flags
     if ui.debugflag:
         return 'debug'
     elif ui.quiet:
         return 'quiet'
     elif ui.verbose:
         return 'verbose'
     return ''
 
 @templatekeyword('whyunstable', requires={'repo', 'ctx'})
 def showwhyunstable(context, mapping):
     """List of dicts explaining all instabilities of a changeset.
     (EXPERIMENTAL)
     """
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
 
     def formatnode(ctx):
         return '%s (%s)' % (scmutil.formatchangeid(ctx), ctx.phasestr())
 
     entries = obsutil.whyunstable(repo, ctx)
 
     for entry in entries:
         if entry.get('divergentnodes'):
             dnodes = entry['divergentnodes']
             dnhybrid = _hybrid(None, [dnode.hex() for dnode in dnodes],
                                lambda x: {'ctx': repo[x]},
                                lambda x: formatnode(repo[x]))
             entry['divergentnodes'] = dnhybrid
 
     tmpl = ('{instability}:{if(divergentnodes, " ")}{divergentnodes} '
             '{reason} {node|short}')
     return templateutil.mappinglist(entries, tmpl=tmpl, sep='\n')
 
 def loadkeyword(ui, extname, registrarobj):
     """Load template keyword from specified registrarobj
     """
     for name, func in registrarobj._table.iteritems():
         keywords[name] = func
 
 # tell hggettext to extract docstrings from these functions:
 i18nfunctions = keywords.values()

tests/test-template-keywords.t

@@ -1,1357 +1,1363
 Test template keywords
 ======================
 
   $ hg init a
   $ cd a
   $ echo a > a
   $ hg add a
   $ echo line 1 > b
   $ echo line 2 >> b
   $ hg commit -l b -d '1000000 0' -u 'User Name <user@hostname>'
 
   $ hg add b
   $ echo other 1 > c
   $ echo other 2 >> c
   $ echo >> c
   $ echo other 3 >> c
   $ hg commit -l c -d '1100000 0' -u 'A. N. Other <other@place>'
 
   $ hg add c
   $ hg commit -m 'no person' -d '1200000 0' -u 'other@place'
   $ echo c >> c
   $ hg commit -m 'no user, no domain' -d '1300000 0' -u 'person'
 
   $ echo foo > .hg/branch
   $ hg commit -m 'new branch' -d '1400000 0' -u 'person'
 
   $ hg co -q 3
   $ echo other 4 >> d
   $ hg add d
   $ hg commit -m 'new head' -d '1500000 0' -u 'person'
 
   $ hg merge -q foo
   $ hg commit -m 'merge' -d '1500001 0' -u 'person'
 
 Second branch starting at nullrev:
 
   $ hg update null
   0 files updated, 0 files merged, 4 files removed, 0 files unresolved
   $ echo second > second
   $ hg add second
   $ hg commit -m second -d '1000000 0' -u 'User Name <user@hostname>'
   created new head
 
   $ echo third > third
   $ hg add third
   $ hg mv second fourth
   $ hg commit -m third -d "2020-01-01 10:01"
 
 Working-directory revision has special identifiers, though they are still
 experimental:
 
   $ hg log -r 'wdir()' -T '{rev}:{node}\n'
   2147483647:ffffffffffffffffffffffffffffffffffffffff
 
   $ hg log -r 'wdir()' -Tjson --debug
   [
    {
     "added": [],
     "bookmarks": [],
     "branch": "default",
     "date": [0, 0],
     "desc": "",
     "extra": {"branch": "default"},
     "manifest": "ffffffffffffffffffffffffffffffffffffffff",
     "modified": [],
     "node": "ffffffffffffffffffffffffffffffffffffffff",
     "parents": ["95c24699272ef57d062b8bccc32c878bf841784a"],
     "phase": "draft",
     "removed": [],
     "rev": 2147483647,
     "tags": [],
     "user": "test"
    }
   ]
 
   $ hg log -r 'wdir()' -T '{manifest}\n'
   2147483647:ffffffffffff
 
+However, for negrev, we refuse to output anything (as well as for null)
+
+  $ hg log -r 'wdir() + null' -T 'bla{negrev}nk\n'
+  blank
+  blank
+
 Changectx-derived keywords are disabled within {manifest} as {node} changes:
 
   $ hg log -r0 -T 'outer:{p1node} {manifest % "inner:{p1node}"}\n'
   outer:0000000000000000000000000000000000000000 inner:
 
 Check that {phase} works correctly on parents:
 
   $ cat << EOF > parentphase
   > changeset_debug = '{rev} ({phase}):{parents}\n'
   > parent = ' {rev} ({phase})'
   > EOF
   $ hg phase -r 5 --public
   $ hg phase -r 7 --secret --force
   $ hg log --debug -G --style ./parentphase
   @  8 (secret): 7 (secret) -1 (public)
   |
   o  7 (secret): -1 (public) -1 (public)
   
   o    6 (draft): 5 (public) 4 (draft)
   |\
   | o  5 (public): 3 (public) -1 (public)
   | |
   o |  4 (draft): 3 (public) -1 (public)
   |/
   o  3 (public): 2 (public) -1 (public)
   |
   o  2 (public): 1 (public) -1 (public)
   |
   o  1 (public): 0 (public) -1 (public)
   |
   o  0 (public): -1 (public) -1 (public)
   
 
 Keys work:
 
   $ for key in author branch branches date desc file_adds file_dels file_mods \
   >         file_copies file_copies_switch files \
   >         manifest node parents rev tags diffstat extras \
   >         p1rev p2rev p1node p2node user; do
   >     for mode in '' --verbose --debug; do
   >         hg log $mode --template "$key$mode: {$key}\n"
   >     done
   > done
   author: test
   author: User Name <user@hostname>
   author: person
   author: person
   author: person
   author: person
   author: other@place
   author: A. N. Other <other@place>
   author: User Name <user@hostname>
   author--verbose: test
   author--verbose: User Name <user@hostname>
   author--verbose: person
   author--verbose: person
   author--verbose: person
   author--verbose: person
   author--verbose: other@place
   author--verbose: A. N. Other <other@place>
   author--verbose: User Name <user@hostname>
   author--debug: test
   author--debug: User Name <user@hostname>
   author--debug: person
   author--debug: person
   author--debug: person
   author--debug: person
   author--debug: other@place
   author--debug: A. N. Other <other@place>
   author--debug: User Name <user@hostname>
   branch: default
   branch: default
   branch: default
   branch: default
   branch: foo
   branch: default
   branch: default
   branch: default
   branch: default
   branch--verbose: default
   branch--verbose: default
   branch--verbose: default
   branch--verbose: default
   branch--verbose: foo
   branch--verbose: default
   branch--verbose: default
   branch--verbose: default
   branch--verbose: default
   branch--debug: default
   branch--debug: default
   branch--debug: default
   branch--debug: default
   branch--debug: foo
   branch--debug: default
   branch--debug: default
   branch--debug: default
   branch--debug: default
   branches: 
   branches: 
   branches: 
   branches: 
   branches: foo
   branches: 
   branches: 
   branches: 
   branches: 
   branches--verbose: 
   branches--verbose: 
   branches--verbose: 
   branches--verbose: 
   branches--verbose: foo
   branches--verbose: 
   branches--verbose: 
   branches--verbose: 
   branches--verbose: 
   branches--debug: 
   branches--debug: 
   branches--debug: 
   branches--debug: 
   branches--debug: foo
   branches--debug: 
   branches--debug: 
   branches--debug: 
   branches--debug: 
   date: 1577872860.00
   date: 1000000.00
   date: 1500001.00
   date: 1500000.00
   date: 1400000.00
   date: 1300000.00
   date: 1200000.00
   date: 1100000.00
   date: 1000000.00
   date--verbose: 1577872860.00
   date--verbose: 1000000.00
   date--verbose: 1500001.00
   date--verbose: 1500000.00
   date--verbose: 1400000.00
   date--verbose: 1300000.00
   date--verbose: 1200000.00
   date--verbose: 1100000.00
   date--verbose: 1000000.00
   date--debug: 1577872860.00
   date--debug: 1000000.00
   date--debug: 1500001.00
   date--debug: 1500000.00
   date--debug: 1400000.00
   date--debug: 1300000.00
   date--debug: 1200000.00
   date--debug: 1100000.00
   date--debug: 1000000.00
   desc: third
   desc: second
   desc: merge
   desc: new head
   desc: new branch
   desc: no user, no domain
   desc: no person
   desc: other 1
   other 2
   
   other 3
   desc: line 1
   line 2
   desc--verbose: third
   desc--verbose: second
   desc--verbose: merge
   desc--verbose: new head
   desc--verbose: new branch
   desc--verbose: no user, no domain
   desc--verbose: no person
   desc--verbose: other 1
   other 2
   
   other 3
   desc--verbose: line 1
   line 2
   desc--debug: third
   desc--debug: second
   desc--debug: merge
   desc--debug: new head
   desc--debug: new branch
   desc--debug: no user, no domain
   desc--debug: no person
   desc--debug: other 1
   other 2
   
   other 3
   desc--debug: line 1
   line 2
   file_adds: fourth third
   file_adds: second
   file_adds: 
   file_adds: d
   file_adds: 
   file_adds: 
   file_adds: c
   file_adds: b
   file_adds: a
   file_adds--verbose: fourth third
   file_adds--verbose: second
   file_adds--verbose: 
   file_adds--verbose: d
   file_adds--verbose: 
   file_adds--verbose: 
   file_adds--verbose: c
   file_adds--verbose: b
   file_adds--verbose: a
   file_adds--debug: fourth third
   file_adds--debug: second
   file_adds--debug: 
   file_adds--debug: d
   file_adds--debug: 
   file_adds--debug: 
   file_adds--debug: c
   file_adds--debug: b
   file_adds--debug: a
   file_dels: second
   file_dels: 
   file_dels: 
   file_dels: 
   file_dels: 
   file_dels: 
   file_dels: 
   file_dels: 
   file_dels: 
   file_dels--verbose: second
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--verbose: 
   file_dels--debug: second
   file_dels--debug: 
   file_dels--debug: 
   file_dels--debug: 
   file_dels--debug: 
   file_dels--debug: 
   file_dels--debug: 
   file_dels--debug: 
   file_dels--debug: 
   file_mods: 
   file_mods: 
   file_mods: 
   file_mods: 
   file_mods: 
   file_mods: c
   file_mods: 
   file_mods: 
   file_mods: 
   file_mods--verbose: 
   file_mods--verbose: 
   file_mods--verbose: 
   file_mods--verbose: 
   file_mods--verbose: 
   file_mods--verbose: c
   file_mods--verbose: 
   file_mods--verbose: 
   file_mods--verbose: 
   file_mods--debug: 
   file_mods--debug: 
   file_mods--debug: 
   file_mods--debug: 
   file_mods--debug: 
   file_mods--debug: c
   file_mods--debug: 
   file_mods--debug: 
   file_mods--debug: 
   file_copies: fourth (second)
   file_copies: 
   file_copies: 
   file_copies: 
   file_copies: 
   file_copies: 
   file_copies: 
   file_copies: 
   file_copies: 
   file_copies--verbose: fourth (second)
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--verbose: 
   file_copies--debug: fourth (second)
   file_copies--debug: 
   file_copies--debug: 
   file_copies--debug: 
   file_copies--debug: 
   file_copies--debug: 
   file_copies--debug: 
   file_copies--debug: 
   file_copies--debug: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--verbose: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   file_copies_switch--debug: 
   files: fourth second third
   files: second
   files: 
   files: d
   files: 
   files: c
   files: c
   files: b
   files: a
   files--verbose: fourth second third
   files--verbose: second
   files--verbose: 
   files--verbose: d
   files--verbose: 
   files--verbose: c
   files--verbose: c
   files--verbose: b
   files--verbose: a
   files--debug: fourth second third
   files--debug: second
   files--debug: 
   files--debug: d
   files--debug: 
   files--debug: c
   files--debug: c
   files--debug: b
   files--debug: a
   manifest: 6:94961b75a2da
   manifest: 5:f2dbc354b94e
   manifest: 4:4dc3def4f9b4
   manifest: 4:4dc3def4f9b4
   manifest: 3:cb5a1327723b
   manifest: 3:cb5a1327723b
   manifest: 2:6e0e82995c35
   manifest: 1:4e8d705b1e53
   manifest: 0:a0c8bcbbb45c
   manifest--verbose: 6:94961b75a2da
   manifest--verbose: 5:f2dbc354b94e
   manifest--verbose: 4:4dc3def4f9b4
   manifest--verbose: 4:4dc3def4f9b4
   manifest--verbose: 3:cb5a1327723b
   manifest--verbose: 3:cb5a1327723b
   manifest--verbose: 2:6e0e82995c35
   manifest--verbose: 1:4e8d705b1e53
   manifest--verbose: 0:a0c8bcbbb45c
   manifest--debug: 6:94961b75a2da554b4df6fb599e5bfc7d48de0c64
   manifest--debug: 5:f2dbc354b94e5ec0b4f10680ee0cee816101d0bf
   manifest--debug: 4:4dc3def4f9b4c6e8de820f6ee74737f91e96a216
   manifest--debug: 4:4dc3def4f9b4c6e8de820f6ee74737f91e96a216
   manifest--debug: 3:cb5a1327723bada42f117e4c55a303246eaf9ccc
   manifest--debug: 3:cb5a1327723bada42f117e4c55a303246eaf9ccc
   manifest--debug: 2:6e0e82995c35d0d57a52aca8da4e56139e06b4b1
   manifest--debug: 1:4e8d705b1e53e3f9375e0e60dc7b525d8211fe55
   manifest--debug: 0:a0c8bcbbb45c63b90b70ad007bf38961f64f2af0
   node: 95c24699272ef57d062b8bccc32c878bf841784a
   node: 29114dbae42b9f078cf2714dbe3a86bba8ec7453
   node: d41e714fe50d9e4a5f11b4d595d543481b5f980b
   node: 13207e5a10d9fd28ec424934298e176197f2c67f
   node: bbe44766e73d5f11ed2177f1838de10c53ef3e74
   node: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   node: 97054abb4ab824450e9164180baf491ae0078465
   node: b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   node: 1e4e1b8f71e05681d422154f5421e385fec3454f
   node--verbose: 95c24699272ef57d062b8bccc32c878bf841784a
   node--verbose: 29114dbae42b9f078cf2714dbe3a86bba8ec7453
   node--verbose: d41e714fe50d9e4a5f11b4d595d543481b5f980b
   node--verbose: 13207e5a10d9fd28ec424934298e176197f2c67f
   node--verbose: bbe44766e73d5f11ed2177f1838de10c53ef3e74
   node--verbose: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   node--verbose: 97054abb4ab824450e9164180baf491ae0078465
   node--verbose: b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   node--verbose: 1e4e1b8f71e05681d422154f5421e385fec3454f
   node--debug: 95c24699272ef57d062b8bccc32c878bf841784a
   node--debug: 29114dbae42b9f078cf2714dbe3a86bba8ec7453
   node--debug: d41e714fe50d9e4a5f11b4d595d543481b5f980b
   node--debug: 13207e5a10d9fd28ec424934298e176197f2c67f
   node--debug: bbe44766e73d5f11ed2177f1838de10c53ef3e74
   node--debug: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   node--debug: 97054abb4ab824450e9164180baf491ae0078465
   node--debug: b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   node--debug: 1e4e1b8f71e05681d422154f5421e385fec3454f
   parents: 
   parents: -1:000000000000 
   parents: 5:13207e5a10d9 4:bbe44766e73d 
   parents: 3:10e46f2dcbf4 
   parents: 
   parents: 
   parents: 
   parents: 
   parents: 
   parents--verbose: 
   parents--verbose: -1:000000000000 
   parents--verbose: 5:13207e5a10d9 4:bbe44766e73d 
   parents--verbose: 3:10e46f2dcbf4 
   parents--verbose: 
   parents--verbose: 
   parents--verbose: 
   parents--verbose: 
   parents--verbose: 
   parents--debug: 7:29114dbae42b9f078cf2714dbe3a86bba8ec7453 -1:0000000000000000000000000000000000000000 
   parents--debug: -1:0000000000000000000000000000000000000000 -1:0000000000000000000000000000000000000000 
   parents--debug: 5:13207e5a10d9fd28ec424934298e176197f2c67f 4:bbe44766e73d5f11ed2177f1838de10c53ef3e74 
   parents--debug: 3:10e46f2dcbf4823578cf180f33ecf0b957964c47 -1:0000000000000000000000000000000000000000 
   parents--debug: 3:10e46f2dcbf4823578cf180f33ecf0b957964c47 -1:0000000000000000000000000000000000000000 
   parents--debug: 2:97054abb4ab824450e9164180baf491ae0078465 -1:0000000000000000000000000000000000000000 
   parents--debug: 1:b608e9d1a3f0273ccf70fb85fd6866b3482bf965 -1:0000000000000000000000000000000000000000 
   parents--debug: 0:1e4e1b8f71e05681d422154f5421e385fec3454f -1:0000000000000000000000000000000000000000 
   parents--debug: -1:0000000000000000000000000000000000000000 -1:0000000000000000000000000000000000000000 
   rev: 8
   rev: 7
   rev: 6
   rev: 5
   rev: 4
   rev: 3
   rev: 2
   rev: 1
   rev: 0
   rev--verbose: 8
   rev--verbose: 7
   rev--verbose: 6
   rev--verbose: 5
   rev--verbose: 4
   rev--verbose: 3
   rev--verbose: 2
   rev--verbose: 1
   rev--verbose: 0
   rev--debug: 8
   rev--debug: 7
   rev--debug: 6
   rev--debug: 5
   rev--debug: 4
   rev--debug: 3
   rev--debug: 2
   rev--debug: 1
   rev--debug: 0
   tags: tip
   tags: 
   tags: 
   tags: 
   tags: 
   tags: 
   tags: 
   tags: 
   tags: 
   tags--verbose: tip
   tags--verbose: 
   tags--verbose: 
   tags--verbose: 
   tags--verbose: 
   tags--verbose: 
   tags--verbose: 
   tags--verbose: 
   tags--verbose: 
   tags--debug: tip
   tags--debug: 
   tags--debug: 
   tags--debug: 
   tags--debug: 
   tags--debug: 
   tags--debug: 
   tags--debug: 
   tags--debug: 
   diffstat: 3: +2/-1
   diffstat: 1: +1/-0
   diffstat: 0: +0/-0
   diffstat: 1: +1/-0
   diffstat: 0: +0/-0
   diffstat: 1: +1/-0
   diffstat: 1: +4/-0
   diffstat: 1: +2/-0
   diffstat: 1: +1/-0
   diffstat--verbose: 3: +2/-1
   diffstat--verbose: 1: +1/-0
   diffstat--verbose: 0: +0/-0
   diffstat--verbose: 1: +1/-0
   diffstat--verbose: 0: +0/-0
   diffstat--verbose: 1: +1/-0
   diffstat--verbose: 1: +4/-0
   diffstat--verbose: 1: +2/-0
   diffstat--verbose: 1: +1/-0
   diffstat--debug: 3: +2/-1
   diffstat--debug: 1: +1/-0
   diffstat--debug: 0: +0/-0
   diffstat--debug: 1: +1/-0
   diffstat--debug: 0: +0/-0
   diffstat--debug: 1: +1/-0
   diffstat--debug: 1: +4/-0
   diffstat--debug: 1: +2/-0
   diffstat--debug: 1: +1/-0
   extras: branch=default
   extras: branch=default
   extras: branch=default
   extras: branch=default
   extras: branch=foo
   extras: branch=default
   extras: branch=default
   extras: branch=default
   extras: branch=default
   extras--verbose: branch=default
   extras--verbose: branch=default
   extras--verbose: branch=default
   extras--verbose: branch=default
   extras--verbose: branch=foo
   extras--verbose: branch=default
   extras--verbose: branch=default
   extras--verbose: branch=default
   extras--verbose: branch=default
   extras--debug: branch=default
   extras--debug: branch=default
   extras--debug: branch=default
   extras--debug: branch=default
   extras--debug: branch=foo
   extras--debug: branch=default
   extras--debug: branch=default
   extras--debug: branch=default
   extras--debug: branch=default
   p1rev: 7
   p1rev: -1
   p1rev: 5
   p1rev: 3
   p1rev: 3
   p1rev: 2
   p1rev: 1
   p1rev: 0
   p1rev: -1
   p1rev--verbose: 7
   p1rev--verbose: -1
   p1rev--verbose: 5
   p1rev--verbose: 3
   p1rev--verbose: 3
   p1rev--verbose: 2
   p1rev--verbose: 1
   p1rev--verbose: 0
   p1rev--verbose: -1
   p1rev--debug: 7
   p1rev--debug: -1
   p1rev--debug: 5
   p1rev--debug: 3
   p1rev--debug: 3
   p1rev--debug: 2
   p1rev--debug: 1
   p1rev--debug: 0
   p1rev--debug: -1
   p2rev: -1
   p2rev: -1
   p2rev: 4
   p2rev: -1
   p2rev: -1
   p2rev: -1
   p2rev: -1
   p2rev: -1
   p2rev: -1
   p2rev--verbose: -1
   p2rev--verbose: -1
   p2rev--verbose: 4
   p2rev--verbose: -1
   p2rev--verbose: -1
   p2rev--verbose: -1
   p2rev--verbose: -1
   p2rev--verbose: -1
   p2rev--verbose: -1
   p2rev--debug: -1
   p2rev--debug: -1
   p2rev--debug: 4
   p2rev--debug: -1
   p2rev--debug: -1
   p2rev--debug: -1
   p2rev--debug: -1
   p2rev--debug: -1
   p2rev--debug: -1
   p1node: 29114dbae42b9f078cf2714dbe3a86bba8ec7453
   p1node: 0000000000000000000000000000000000000000
   p1node: 13207e5a10d9fd28ec424934298e176197f2c67f
   p1node: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   p1node: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   p1node: 97054abb4ab824450e9164180baf491ae0078465
   p1node: b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   p1node: 1e4e1b8f71e05681d422154f5421e385fec3454f
   p1node: 0000000000000000000000000000000000000000
   p1node--verbose: 29114dbae42b9f078cf2714dbe3a86bba8ec7453
   p1node--verbose: 0000000000000000000000000000000000000000
   p1node--verbose: 13207e5a10d9fd28ec424934298e176197f2c67f
   p1node--verbose: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   p1node--verbose: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   p1node--verbose: 97054abb4ab824450e9164180baf491ae0078465
   p1node--verbose: b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   p1node--verbose: 1e4e1b8f71e05681d422154f5421e385fec3454f
   p1node--verbose: 0000000000000000000000000000000000000000
   p1node--debug: 29114dbae42b9f078cf2714dbe3a86bba8ec7453
   p1node--debug: 0000000000000000000000000000000000000000
   p1node--debug: 13207e5a10d9fd28ec424934298e176197f2c67f
   p1node--debug: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   p1node--debug: 10e46f2dcbf4823578cf180f33ecf0b957964c47
   p1node--debug: 97054abb4ab824450e9164180baf491ae0078465
   p1node--debug: b608e9d1a3f0273ccf70fb85fd6866b3482bf965
   p1node--debug: 1e4e1b8f71e05681d422154f5421e385fec3454f
   p1node--debug: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node: bbe44766e73d5f11ed2177f1838de10c53ef3e74
   p2node: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: bbe44766e73d5f11ed2177f1838de10c53ef3e74
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--verbose: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: bbe44766e73d5f11ed2177f1838de10c53ef3e74
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   p2node--debug: 0000000000000000000000000000000000000000
   user: test
   user: User Name <user@hostname>
   user: person
   user: person
   user: person
   user: person
   user: other@place
   user: A. N. Other <other@place>
   user: User Name <user@hostname>
   user--verbose: test
   user--verbose: User Name <user@hostname>
   user--verbose: person
   user--verbose: person
   user--verbose: person
   user--verbose: person
   user--verbose: other@place
   user--verbose: A. N. Other <other@place>
   user--verbose: User Name <user@hostname>
   user--debug: test
   user--debug: User Name <user@hostname>
   user--debug: person
   user--debug: person
   user--debug: person
   user--debug: person
   user--debug: other@place
   user--debug: A. N. Other <other@place>
   user--debug: User Name <user@hostname>
 
 Add a dummy commit to make up for the instability of the above:
 
   $ echo a > a
   $ hg add a
   $ hg ci -m future
 
 Add a commit that does all possible modifications at once
 
   $ echo modify >> third
   $ touch b
   $ hg add b
   $ hg mv fourth fifth
   $ hg rm a
   $ hg ci -m "Modify, add, remove, rename"
 
 Test files list:
 
   $ hg log -l1 -T '{join(file_mods, " ")}\n'
   third
   $ hg log -l1 -T '{file_mods % "{file}\n"}'
   third
   $ hg log -l1 -T '{file_mods % "{path}\n"}'
   third
 
   $ hg log -l1 -T '{join(files, " ")}\n'
   a b fifth fourth third
   $ hg log -l1 -T '{files % "{file}\n"}'
   a
   b
   fifth
   fourth
   third
   $ hg log -l1 -T '{files % "{path}\n"}'
   a
   b
   fifth
   fourth
   third
 
 Test file copies dict:
 
   $ hg log -r8 -T '{join(file_copies, " ")}\n'
   fourth (second)
   $ hg log -r8 -T '{file_copies % "{name} <- {source}\n"}'
   fourth <- second
   $ hg log -r8 -T '{file_copies % "{path} <- {source}\n"}'
   fourth <- second
 
   $ hg log -r8 -T '{join(file_copies_switch, " ")}\n'
   
   $ hg log -r8 -C -T '{join(file_copies_switch, " ")}\n'
   fourth (second)
   $ hg log -r8 -C -T '{file_copies_switch % "{name} <- {source}\n"}'
   fourth <- second
   $ hg log -r8 -C -T '{file_copies_switch % "{path} <- {source}\n"}'
   fourth <- second
 
 Test file attributes:
 
   $ hg log -l1 -T '{files % "{status} {pad(size, 3, left=True)} {path}\n"}'
   R     a
   A   0 b
   A   7 fifth
   R     fourth
   M  13 third
 
 Test file status including clean ones:
 
   $ hg log -r9 -T '{files("**") % "{status} {path}\n"}'
   A a
   C fourth
   C third
 
 Test index keyword:
 
   $ hg log -l 2 -T '{index + 10}{files % " {index}:{file}"}\n'
   10 0:a 1:b 2:fifth 3:fourth 4:third
   11 0:a
 
   $ hg branches -T '{index} {branch}\n'
   0 default
   1 foo
 
 p1/p2 keywords:
 
   $ hg log -r4:7 -GT '{rev} p1:{p1} p2:{p2} p1.rev:{p1.rev} p2.node:{p2.node}\n'
   o  7 p1:-1:000000000000 p2:-1:000000000000 p1.rev:-1 p2.node:0000000000000000000000000000000000000000
   
   o    6 p1:5:13207e5a10d9 p2:4:bbe44766e73d p1.rev:5 p2.node:bbe44766e73d5f11ed2177f1838de10c53ef3e74
   |\
   | o  5 p1:3:10e46f2dcbf4 p2:-1:000000000000 p1.rev:3 p2.node:0000000000000000000000000000000000000000
   | |
   | ~
   o  4 p1:3:10e46f2dcbf4 p2:-1:000000000000 p1.rev:3 p2.node:0000000000000000000000000000000000000000
   |
   ~
 
 TODO: no idea what should be displayed as a JSON representation
   $ hg log -r6 -T 'p1:{p1|json}\np2:{p2|json}\n'
   p1:{}
   p2:{}
 
 ui verbosity:
 
   $ hg log -l1 -T '{verbosity}\n'
   
   $ hg log -l1 -T '{verbosity}\n' --debug
   debug
   $ hg log -l1 -T '{verbosity}\n' --quiet
   quiet
   $ hg log -l1 -T '{verbosity}\n' --verbose
   verbose
 
   $ cd ..
 
 latesttag:
 
   $ hg init latesttag
   $ cd latesttag
 
   $ echo a > file
   $ hg ci -Am a -d '0 0'
   adding file
 
   $ echo b >> file
   $ hg ci -m b -d '1 0'
 
   $ echo c >> head1
   $ hg ci -Am h1c -d '2 0'
   adding head1
 
   $ hg update -q 1
   $ echo d >> head2
   $ hg ci -Am h2d -d '3 0'
   adding head2
   created new head
 
   $ echo e >> head2
   $ hg ci -m h2e -d '4 0'
 
   $ hg merge -q
   $ hg ci -m merge -d '5 -3600'
 
 No tag set:
 
   $ hg log -G --template '{rev}: {latesttag}+{latesttagdistance}\n'
   @    5: null+5
   |\
   | o  4: null+4
   | |
   | o  3: null+3
   | |
   o |  2: null+3
   |/
   o  1: null+2
   |
   o  0: null+1
   
 
 One common tag: longest path wins for {latesttagdistance}:
 
   $ hg tag -r 1 -m t1 -d '6 0' t1
   $ hg log -G --template '{rev}: {latesttag}+{latesttagdistance}\n'
   @  6: t1+4
   |
   o    5: t1+3
   |\
   | o  4: t1+2
   | |
   | o  3: t1+1
   | |
   o |  2: t1+1
   |/
   o  1: t1+0
   |
   o  0: null+1
   
 
 One ancestor tag: closest wins:
 
   $ hg tag -r 2 -m t2 -d '7 0' t2
   $ hg log -G --template '{rev}: {latesttag}+{latesttagdistance}\n'
   @  7: t2+3
   |
   o  6: t2+2
   |
   o    5: t2+1
   |\
   | o  4: t1+2
   | |
   | o  3: t1+1
   | |
   o |  2: t2+0
   |/
   o  1: t1+0
   |
   o  0: null+1
   
 
 Two branch tags: more recent wins if same number of changes:
 
   $ hg tag -r 3 -m t3 -d '8 0' t3
   $ hg log -G --template '{rev}: {latesttag}+{latesttagdistance}\n'
   @  8: t3+5
   |
   o  7: t3+4
   |
   o  6: t3+3
   |
   o    5: t3+2
   |\
   | o  4: t3+1
   | |
   | o  3: t3+0
   | |
   o |  2: t2+0
   |/
   o  1: t1+0
   |
   o  0: null+1
   
 
 Two branch tags: fewest changes wins:
 
   $ hg tag -r 4 -m t4 -d '4 0' t4 # older than t2, but should not matter
   $ hg log -G --template "{rev}: {latesttag % '{tag}+{distance},{changes} '}\n"
   @  9: t4+5,6
   |
   o  8: t4+4,5
   |
   o  7: t4+3,4
   |
   o  6: t4+2,3
   |
   o    5: t4+1,2
   |\
   | o  4: t4+0,0
   | |
   | o  3: t3+0,0
   | |
   o |  2: t2+0,0
   |/
   o  1: t1+0,0
   |
   o  0: null+1,1
   
 
 Merged tag overrides:
 
   $ hg tag -r 5 -m t5 -d '9 0' t5
   $ hg tag -r 3 -m at3 -d '10 0' at3
   $ hg log -G --template '{rev}: {latesttag}+{latesttagdistance}\n'
   @  11: t5+6
   |
   o  10: t5+5
   |
   o  9: t5+4
   |
   o  8: t5+3
   |
   o  7: t5+2
   |
   o  6: t5+1
   |
   o    5: t5+0
   |\
   | o  4: t4+0
   | |
   | o  3: at3:t3+0
   | |
   o |  2: t2+0
   |/
   o  1: t1+0
   |
   o  0: null+1
   
 
   $ hg log -G --template "{rev}: {latesttag % '{tag}+{distance},{changes} '}\n"
   @  11: t5+6,6
   |
   o  10: t5+5,5
   |
   o  9: t5+4,4
   |
   o  8: t5+3,3
   |
   o  7: t5+2,2
   |
   o  6: t5+1,1
   |
   o    5: t5+0,0
   |\
   | o  4: t4+0,0
   | |
   | o  3: at3+0,0 t3+0,0
   | |
   o |  2: t2+0,0
   |/
   o  1: t1+0,0
   |
   o  0: null+1,1
   
 
 Tags of working-directory parents (issue6055):
 
   $ hg update -q 3
   $ echo a > head3
   $ hg ci -qAm h3a
   $ hg merge -q 2
   $ hg log -Gr'::wdir()' -T "{rev}: {latesttag % '{tag}+{distance},{changes} '}\n"
   o    2147483647: at3+2,3 t3+2,3
   |\
   | @  12: at3+1,1 t3+1,1
   | |
   | o  3: at3+0,0 t3+0,0
   | |
   @ |  2: t2+0,0
   |/
   o  1: t1+0,0
   |
   o  0: null+1,1
   
 
   $ hg ci -m merge
   $ hg log -Gr'::.' -T "{rev}: {latesttag % '{tag}+{distance},{changes} '}\n"
   @    13: at3+2,3 t3+2,3
   |\
   | o  12: at3+1,1 t3+1,1
   | |
   | o  3: at3+0,0 t3+0,0
   | |
   o |  2: t2+0,0
   |/
   o  1: t1+0,0
   |
   o  0: null+1,1
   
 
   $ cd ..
 
 Set up repository containing template fragments in commit metadata:
 
   $ hg init r
   $ cd r
   $ echo a > a
   $ hg ci -Am '{rev}'
   adding a
 
   $ hg branch -q 'text.{rev}'
   $ echo aa >> aa
   $ hg ci -u '{node|short}' -m 'desc to be wrapped desc to be wrapped'
 
 Test termwidth:
 
   $ COLUMNS=25 hg log -l1 --template '{fill(desc, termwidth, "{node|short}:", "termwidth.{rev}:")}'
   bcc7ff960b8e:desc to be
   termwidth.1:wrapped desc
   termwidth.1:to be wrapped (no-eol)
 
 Just one more commit:
 
   $ echo b > b
   $ hg ci -qAm b
 
 Test 'originalnode'
 
   $ hg log -r 1 -T '{revset("null") % "{node|short} {originalnode|short}"}\n'
   000000000000 bcc7ff960b8e
   $ hg log -r 0 -T '{manifest % "{node} {originalnode}"}\n'
   a0c8bcbbb45c63b90b70ad007bf38961f64f2af0 f7769ec2ab975ad19684098ad1ffd9b81ecc71a1
 
 Test active bookmark templating
 
   $ hg book foo
   $ hg book bar
   $ hg log --template "{rev} {bookmarks % '{bookmark}{ifeq(bookmark, active, \"*\")} '}\n"
   2 bar* foo 
   1 
   0 
   $ hg log --template "{rev} {activebookmark}\n"
   2 bar
   1 
   0 
   $ hg bookmarks --inactive bar
   $ hg log --template "{rev} {activebookmark}\n"
   2 
   1 
   0 
   $ hg book -r1 baz
   $ hg log --template "{rev} {join(bookmarks, ' ')}\n"
   2 bar foo
   1 baz
   0 
   $ hg log --template "{rev} {ifcontains('foo', bookmarks, 't', 'f')}\n"
   2 t
   1 f
   0 f
 
 Test namespaces dict
 
   $ hg --config extensions.revnamesext=$TESTDIR/revnamesext.py log -T '{rev}\n{namespaces % " {namespace} color={colorname} builtin={builtin}\n  {join(names, ",")}\n"}\n'
   2
    bookmarks color=bookmark builtin=True
     bar,foo
    tags color=tag builtin=True
     tip
    branches color=branch builtin=True
     text.{rev}
    revnames color=revname builtin=False
     r2
   
   1
    bookmarks color=bookmark builtin=True
     baz
    tags color=tag builtin=True
     
    branches color=branch builtin=True
     text.{rev}
    revnames color=revname builtin=False
     r1
   
   0
    bookmarks color=bookmark builtin=True
     
    tags color=tag builtin=True
     
    branches color=branch builtin=True
     default
    revnames color=revname builtin=False
     r0
   
   $ hg log -r2 -T '{namespaces % "{namespace}: {names}\n"}'
   bookmarks: bar foo
   tags: tip
   branches: text.{rev}
   $ hg log -r2 -T '{namespaces % "{namespace}:\n{names % " {name}\n"}"}'
   bookmarks:
    bar
    foo
   tags:
    tip
   branches:
    text.{rev}
   $ hg log -r2 -T '{get(namespaces, "bookmarks") % "{name}\n"}'
   bar
   foo
   $ hg log -r2 -T '{namespaces.bookmarks % "{bookmark}\n"}'
   bar
   foo
 
   $ cd ..
 
 Test 'graphwidth' in 'hg log' on various topologies. The key here is that the
 printed graphwidths 3, 5, 7, etc. should all line up in their respective
 columns. We don't care about other aspects of the graph rendering here.
 
   $ hg init graphwidth
   $ cd graphwidth
 
   $ wrappabletext="a a a a a a a a a a a a"
 
   $ printf "first\n" > file
   $ hg add file
   $ hg commit -m "$wrappabletext"
 
   $ printf "first\nsecond\n" > file
   $ hg commit -m "$wrappabletext"
 
   $ hg checkout 0
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ printf "third\nfirst\n" > file
   $ hg commit -m "$wrappabletext"
   created new head
 
   $ hg merge
   merging file
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ hg log --graph -T "{graphwidth}"
   @  3
   |
   | @  5
   |/
   o  3
   
   $ hg commit -m "$wrappabletext"
 
   $ hg log --graph -T "{graphwidth}"
   @    5
   |\
   | o  5
   | |
   o |  5
   |/
   o  3
   
 
   $ hg checkout 0
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ printf "third\nfirst\nsecond\n" > file
   $ hg commit -m "$wrappabletext"
   created new head
 
   $ hg log --graph -T "{graphwidth}"
   @  3
   |
   | o    7
   | |\
   +---o  7
   | |
   | o  5
   |/
   o  3
   
 
   $ hg log --graph -T "{graphwidth}" -r 3
   o    5
   |\
   ~ ~
 
   $ hg log --graph -T "{graphwidth}" -r 1
   o  3
   |
   ~
 
   $ hg merge
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg commit -m "$wrappabletext"
 
   $ printf "seventh\n" >> file
   $ hg commit -m "$wrappabletext"
 
   $ hg log --graph -T "{graphwidth}"
   @  3
   |
   o    5
   |\
   | o  5
   | |
   o |    7
   |\ \
   | o |  7
   | |/
   o /  5
   |/
   o  3
   
 
 The point of graphwidth is to allow wrapping that accounts for the space taken
 by the graph.
 
   $ COLUMNS=10 hg log --graph -T "{fill(desc, termwidth - graphwidth)}"
   @  a a a a
   |  a a a a
   |  a a a a
   o    a a a
   |\   a a a
   | |  a a a
   | |  a a a
   | o  a a a
   | |  a a a
   | |  a a a
   | |  a a a
   o |    a a
   |\ \   a a
   | | |  a a
   | | |  a a
   | | |  a a
   | | |  a a
   | o |  a a
   | |/   a a
   | |    a a
   | |    a a
   | |    a a
   | |    a a
   o |  a a a
   |/   a a a
   |    a a a
   |    a a a
   o  a a a a
      a a a a
      a a a a
 
 Something tricky happens when there are elided nodes; the next drawn row of
 edges can be more than one column wider, but the graph width only increases by
 one column. The remaining columns are added in between the nodes.
 
   $ hg log --graph -T "{graphwidth}" -r "0|2|4|5"
   o    5
   |\
   | \
   | :\
   o : :  7
   :/ /
   : o  5
   :/
   o  3
   
 
   $ cd ..