# show.py - Extension implementing `hg show`
#
# Copyright 2017 Gregory Szorc <gregory.szorc@gmail.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""unified command to show various repository information (EXPERIMENTAL)
This extension provides the :hg:`show` command, which provides a central
command for displaying commonly-accessed repository data and views of that
data.
"""
from __future__ import absolute_import
from mercurial.i18n import _
from mercurial.node import nullrev
from mercurial import (
cmdutil,
error,
formatter,
graphmod,
pycompat,
registrar,
revset,
revsetlang,
)
# 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 = 'ships-with-hg-core'
cmdtable = {}
command = registrar.command(cmdtable)
revsetpredicate = registrar.revsetpredicate()
class showcmdfunc(registrar._funcregistrarbase):
"""Register a function to be invoked for an `hg show <thing>`."""
# Used by _formatdoc().
_docformat = '%s -- %s'
def _extrasetup(self, name, func, fmtopic=None, csettopic=None):
"""Called with decorator arguments to register a show view.
``name`` is the sub-command name.
``func`` is the function being decorated.
``fmtopic`` is the topic in the style that will be rendered for
this view.
``csettopic`` is the topic in the style to be used for a changeset
printer.
If ``fmtopic`` is specified, the view function will receive a
formatter instance. If ``csettopic`` is specified, the view
function will receive a changeset printer.
"""
func._fmtopic = fmtopic
func._csettopic = csettopic
showview = showcmdfunc()
@command('show', [
# TODO: Switch this template flag to use cmdutil.formatteropts if
# 'hg show' becomes stable before --template/-T is stable. For now,
# we are putting it here without the '(EXPERIMENTAL)' flag because it
# is an important part of the 'hg show' user experience and the entire
# 'hg show' experience is experimental.
('T', 'template', '', ('display with template'), _('TEMPLATE')),
], _('VIEW'))
def show(ui, repo, view=None, template=None):
"""show various repository information
A requested view of repository data is displayed.
If no view is requested, the list of available views is shown and the
command aborts.
.. note::
There are no backwards compatibility guarantees for the output of this
command. Output may change in any future Mercurial release.
Consumers wanting stable command output should specify a template via
``-T/--template``.
List of available views:
"""
if ui.plain() and not template:
hint = _('invoke with -T/--template to control output format')
raise error.Abort(_('must specify a template in plain mode'), hint=hint)
views = showview._table
if not view:
ui.pager('show')
# TODO consider using formatter here so available views can be
# rendered to custom format.
ui.write(_('available views:\n'))
ui.write('\n')
for name, func in sorted(views.items()):
ui.write(('%s\n') % func.__doc__)
ui.write('\n')
raise error.Abort(_('no view requested'),
hint=_('use "hg show VIEW" to choose a view'))
# TODO use same logic as dispatch to perform prefix matching.
if view not in views:
raise error.Abort(_('unknown view: %s') % view,
hint=_('run "hg show" to see available views'))
template = template or 'show'
fn = views[view]
ui.pager('show')
if fn._fmtopic:
fmtopic = 'show%s' % fn._fmtopic
with ui.formatter(fmtopic, {'template': template}) as fm:
return fn(ui, repo, fm)
elif fn._csettopic:
ref = 'show%s' % fn._csettopic
spec = formatter.lookuptemplate(ui, ref, template)
displayer = cmdutil.changeset_templater(ui, repo, spec, buffered=True)
return fn(ui, repo, displayer)
else:
return fn(ui, repo)
@showview('bookmarks', fmtopic='bookmarks')
def showbookmarks(ui, repo, fm):
"""bookmarks and their associated changeset"""
marks = repo._bookmarks
if not len(marks):
# This is a bit hacky. Ideally, templates would have a way to
# specify an empty output, but we shouldn't corrupt JSON while
# waiting for this functionality.
if not isinstance(fm, formatter.jsonformatter):
ui.write(_('(no bookmarks set)\n'))
return
active = repo._activebookmark
longestname = max(len(b) for b in marks)
# TODO consider exposing longest shortest(node).
for bm, node in sorted(marks.items()):
fm.startitem()
fm.context(ctx=repo[node])
fm.write('bookmark', '%s', bm)
fm.write('node', fm.hexfunc(node), fm.hexfunc(node))
fm.data(active=bm == active,
longestbookmarklen=longestname)
@revsetpredicate('_underway([commitage[, headage]])')
def underwayrevset(repo, subset, x):
args = revset.getargsdict(x, 'underway', 'commitage headage')
if 'commitage' not in args:
args['commitage'] = None
if 'headage' not in args:
args['headage'] = None
# We assume callers of this revset add a topographical sort on the
# result. This means there is no benefit to making the revset lazy
# since the topographical sort needs to consume all revs.
#
# With this in mind, we build up the set manually instead of constructing
# a complex revset. This enables faster execution.
# Mutable changesets (non-public) are the most important changesets
# to return. ``not public()`` will also pull in obsolete changesets if
# there is a non-obsolete changeset with obsolete ancestors. This is
# why we exclude obsolete changesets from this query.
rs = 'not public() and not obsolete()'
rsargs = []
if args['commitage']:
rs += ' and date(%s)'
rsargs.append(revsetlang.getstring(args['commitage'],
_('commitage requires a string')))
mutable = repo.revs(rs, *rsargs)
relevant = revset.baseset(mutable)
# Add parents of mutable changesets to provide context.
relevant += repo.revs('parents(%ld)', mutable)
# We also pull in (public) heads if they a) aren't closing a branch
# b) are recent.
rs = 'head() and not closed()'
rsargs = []
if args['headage']:
rs += ' and date(%s)'
rsargs.append(revsetlang.getstring(args['headage'],
_('headage requires a string')))
relevant += repo.revs(rs, *rsargs)
# Add working directory parent.
wdirrev = repo['.'].rev()
if wdirrev != nullrev:
relevant += revset.baseset({wdirrev})
return subset & relevant
@showview('work', csettopic='work')
def showwork(ui, repo, displayer):
"""changesets that aren't finished"""
# TODO support date-based limiting when calling revset.
revs = repo.revs('sort(_underway(), topo)')
revdag = graphmod.dagwalker(repo, revs)
ui.setconfig('experimental', 'graphshorten', True)
cmdutil.displaygraph(ui, repo, revdag, displayer, graphmod.asciiedges)
# Adjust the docstring of the show command so it shows all registered views.
# This is a bit hacky because it runs at the end of module load. When moved
# into core or when another extension wants to provide a view, we'll need
# to do this more robustly.
# TODO make this more robust.
def _updatedocstring():
longest = max(map(len, showview._table.keys()))
entries = []
for key in sorted(showview._table.keys()):
entries.append(pycompat.sysstr(' %s %s' % (
key.ljust(longest), showview._table[key]._origdoc)))
cmdtable['show'][0].__doc__ = pycompat.sysstr('%s\n\n%s\n ') % (
cmdtable['show'][0].__doc__.rstrip(),
pycompat.sysstr('\n\n').join(entries))
_updatedocstring()