hgext/show.py
author Gregory Szorc <gregory.szorc@gmail.com>
Tue, 18 Apr 2017 10:49:46 -0700
branchstable
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child 32291 bd872f64a8ba
permissions -rw-r--r--
show: rename "underway" to "work" Durham and I both like this better than "underway." We can add aliases and bikeshed on the name during the 4.3 cycle, as this whole extension is highly experimental.
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# show.py - Extension implementing `hg show`
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#
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# Copyright 2017 Gregory Szorc <gregory.szorc@gmail.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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"""unified command to show various repository information (EXPERIMENTAL)
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This extension provides the :hg:`show` command, which provides a central
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command for displaying commonly-accessed repository data and views of that
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data.
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"""
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from __future__ import absolute_import
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from mercurial.i18n import _
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from mercurial.node import nullrev
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from mercurial import (
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    cmdutil,
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    error,
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    formatter,
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    graphmod,
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    pycompat,
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    registrar,
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    revset,
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    revsetlang,
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)
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# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
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# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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# be specifying the version(s) of Mercurial they are tested with, or
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# leave the attribute unspecified.
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testedwith = 'ships-with-hg-core'
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cmdtable = {}
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command = cmdutil.command(cmdtable)
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revsetpredicate = registrar.revsetpredicate()
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class showcmdfunc(registrar._funcregistrarbase):
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    """Register a function to be invoked for an `hg show <thing>`."""
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    # Used by _formatdoc().
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    _docformat = '%s -- %s'
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    def _extrasetup(self, name, func, fmtopic=None):
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        """Called with decorator arguments to register a show view.
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        ``name`` is the sub-command name.
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        ``func`` is the function being decorated.
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        ``fmtopic`` is the topic in the style that will be rendered for
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        this view.
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        """
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        func._fmtopic = fmtopic
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showview = showcmdfunc()
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@command('show', [
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    # TODO: Switch this template flag to use commands.formatteropts if
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    # 'hg show' becomes stable before --template/-T is stable. For now,
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    # we are putting it here without the '(EXPERIMENTAL)' flag because it
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    # is an important part of the 'hg show' user experience and the entire
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    # 'hg show' experience is experimental.
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    ('T', 'template', '', ('display with template'), _('TEMPLATE')),
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    ], _('VIEW'))
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def show(ui, repo, view=None, template=None):
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    """show various repository information
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    A requested view of repository data is displayed.
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    If no view is requested, the list of available views is shown and the
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    command aborts.
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    .. note::
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       There are no backwards compatibility guarantees for the output of this
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       command. Output may change in any future Mercurial release.
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       Consumers wanting stable command output should specify a template via
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       ``-T/--template``.
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    List of available views:
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    """
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    if ui.plain() and not template:
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        hint = _('invoke with -T/--template to control output format')
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        raise error.Abort(_('must specify a template in plain mode'), hint=hint)
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    views = showview._table
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    if not view:
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        ui.pager('show')
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        # TODO consider using formatter here so available views can be
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        # rendered to custom format.
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        ui.write(_('available views:\n'))
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        ui.write('\n')
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        for name, func in sorted(views.items()):
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            ui.write(('%s\n') % func.__doc__)
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        ui.write('\n')
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        raise error.Abort(_('no view requested'),
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                          hint=_('use "hg show VIEW" to choose a view'))
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    # TODO use same logic as dispatch to perform prefix matching.
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    if view not in views:
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        raise error.Abort(_('unknown view: %s') % view,
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                          hint=_('run "hg show" to see available views'))
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    template = template or 'show'
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    fmtopic = 'show%s' % views[view]._fmtopic
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    ui.pager('show')
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    with ui.formatter(fmtopic, {'template': template}) as fm:
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        return views[view](ui, repo, fm)
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@showview('bookmarks', fmtopic='bookmarks')
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def showbookmarks(ui, repo, fm):
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    """bookmarks and their associated changeset"""
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    marks = repo._bookmarks
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    if not len(marks):
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        # This is a bit hacky. Ideally, templates would have a way to
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        # specify an empty output, but we shouldn't corrupt JSON while
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        # waiting for this functionality.
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        if not isinstance(fm, formatter.jsonformatter):
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            ui.write(_('(no bookmarks set)\n'))
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        return
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    active = repo._activebookmark
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    longestname = max(len(b) for b in marks)
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    # TODO consider exposing longest shortest(node).
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    for bm, node in sorted(marks.items()):
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        fm.startitem()
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        fm.context(ctx=repo[node])
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        fm.write('bookmark', '%s', bm)
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        fm.write('node', fm.hexfunc(node), fm.hexfunc(node))
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        fm.data(active=bm == active,
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                longestbookmarklen=longestname)
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@revsetpredicate('_underway([commitage[, headage]])')
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def underwayrevset(repo, subset, x):
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    args = revset.getargsdict(x, 'underway', 'commitage headage')
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    if 'commitage' not in args:
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        args['commitage'] = None
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    if 'headage' not in args:
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        args['headage'] = None
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    # We assume callers of this revset add a topographical sort on the
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    # result. This means there is no benefit to making the revset lazy
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    # since the topographical sort needs to consume all revs.
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    #
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    # With this in mind, we build up the set manually instead of constructing
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    # a complex revset. This enables faster execution.
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    # Mutable changesets (non-public) are the most important changesets
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    # to return. ``not public()`` will also pull in obsolete changesets if
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    # there is a non-obsolete changeset with obsolete ancestors. This is
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    # why we exclude obsolete changesets from this query.
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    rs = 'not public() and not obsolete()'
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    rsargs = []
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    if args['commitage']:
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        rs += ' and date(%s)'
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        rsargs.append(revsetlang.getstring(args['commitage'],
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                                           _('commitage requires a string')))
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    mutable = repo.revs(rs, *rsargs)
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    relevant = revset.baseset(mutable)
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    # Add parents of mutable changesets to provide context.
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    relevant += repo.revs('parents(%ld)', mutable)
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    # We also pull in (public) heads if they a) aren't closing a branch
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    # b) are recent.
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    rs = 'head() and not closed()'
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    rsargs = []
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    if args['headage']:
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        rs += ' and date(%s)'
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        rsargs.append(revsetlang.getstring(args['headage'],
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                                           _('headage requires a string')))
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    relevant += repo.revs(rs, *rsargs)
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    # Add working directory parent.
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    wdirrev = repo['.'].rev()
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    if wdirrev != nullrev:
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        relevant += revset.baseset(set([wdirrev]))
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    return subset & relevant
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@showview('work', fmtopic='work')
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def showwork(ui, repo, fm):
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    """changesets that aren't finished"""
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    # TODO support date-based limiting when calling revset.
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    revs = repo.revs('sort(_underway(), topo)')
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    revdag = graphmod.dagwalker(repo, revs)
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    displayer = cmdutil.changeset_templater(ui, repo, None, None,
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                                            tmpl=fm._t.load(fm._topic),
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                                            mapfile=None, buffered=True)
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    ui.setconfig('experimental', 'graphshorten', True)
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    cmdutil.displaygraph(ui, repo, revdag, displayer, graphmod.asciiedges)
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# Adjust the docstring of the show command so it shows all registered views.
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# This is a bit hacky because it runs at the end of module load. When moved
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# into core or when another extension wants to provide a view, we'll need
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# to do this more robustly.
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# TODO make this more robust.
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def _updatedocstring():
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    longest = max(map(len, showview._table.keys()))
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    entries = []
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    for key in sorted(showview._table.keys()):
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        entries.append(pycompat.sysstr('    %s   %s' % (
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            key.ljust(longest), showview._table[key]._origdoc)))
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    cmdtable['show'][0].__doc__ = pycompat.sysstr('%s\n\n%s\n    ') % (
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        cmdtable['show'][0].__doc__.rstrip(),
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        pycompat.sysstr('\n\n').join(entries))
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_updatedocstring()