36     formatter,

    54     templater,

  1857 @command('debugtemplate',

  1858     [('r', 'rev', [], _('apply template on changesets'), _('REV')),

  1859      ('D', 'define', [], _('define template keyword'), _('KEY=VALUE'))],

  1860     _('[-r REV]... [-D KEY=VALUE]... TEMPLATE'),

  1861     optionalrepo=True)

  1862 def debugtemplate(ui, repo, tmpl, **opts):

  1863     """parse and apply a template

  1864 

  1865     If -r/--rev is given, the template is processed as a log template and

  1866     applied to the given changesets. Otherwise, it is processed as a generic

  1867     template.

  1868 

  1869     Use --verbose to print the parsed tree.

  1870     """

  1871     revs = None

  1872     if opts['rev']:

  1873         if repo is None:

  1874             raise error.RepoError(_('there is no Mercurial repository here '

  1875                                     '(.hg not found)'))

  1876         revs = scmutil.revrange(repo, opts['rev'])

  1877 

  1878     props = {}

  1879     for d in opts['define']:

  1880         try:

  1881             k, v = (e.strip() for e in d.split('=', 1))

  1882             if not k:

  1883                 raise ValueError

  1884             props[k] = v

  1885         except ValueError:

  1886             raise error.Abort(_('malformed keyword definition: %s') % d)

  1887 

  1888     if ui.verbose:

  1889         aliases = ui.configitems('templatealias')

  1890         tree = templater.parse(tmpl)

  1891         ui.note(templater.prettyformat(tree), '\n')

  1892         newtree = templater.expandaliases(tree, aliases)

  1893         if newtree != tree:

  1894             ui.note(("* expanded:\n"), templater.prettyformat(newtree), '\n')

  1895 

  1896     mapfile = None

  1897     if revs is None:

  1898         k = 'debugtemplate'

  1899         t = formatter.maketemplater(ui, k, tmpl)

  1900         ui.write(templater.stringify(t(k, **props)))

  1901     else:

  1902         displayer = cmdutil.changeset_templater(ui, repo, None, opts, tmpl,

  1903                                                 mapfile, buffered=False)

  1904         for r in revs:

  1905             displayer.show(repo[r], **props)

  1906         displayer.close()