Patchwork [4,of,4] dispatch: store norepo/optionalrepo/inferrepo attributes in function (API)

# HG changeset patch
# User Yuya Nishihara <yuya@tcha.org>
# Date 1451654185 -32400
#      Fri Jan 01 22:16:25 2016 +0900
# Node ID 31acfd12c0748e0b9ba902dc036d267f82d57c90
# Parent  c8ea5f04dfb0c291ca29d89ab3bf93e75de60506
dispatch: store norepo/optionalrepo/inferrepo attributes in function (API)

This can eliminate import cycles and ugly push/pop of global variables at
_checkshellalias(). Attributes of aliascmd are directly accessible.

Because norepo/optionalrepo/inferrepo lists aren't populated, extensions
examining them no longer work. That's why this patch removes these lists
to signal the API incompatibility.

This breaks 3rd-party extensions that are yet to be ported to @command
decorator.

On Sun, Feb 28, 2016 at 03:55:43PM +0900, Yuya Nishihara wrote:
> # HG changeset patch
> # User Yuya Nishihara <yuya@tcha.org>
> # Date 1451654185 -32400
> #      Fri Jan 01 22:16:25 2016 +0900
> # Node ID 31acfd12c0748e0b9ba902dc036d267f82d57c90
> # Parent  c8ea5f04dfb0c291ca29d89ab3bf93e75de60506
> dispatch: store norepo/optionalrepo/inferrepo attributes in function (API)
>

Queued these, nice cleanup.

>
> This can eliminate import cycles and ugly push/pop of global variables at
> _checkshellalias(). Attributes of aliascmd are directly accessible.
>
> Because norepo/optionalrepo/inferrepo lists aren't populated, extensions
> examining them no longer work. That's why this patch removes these lists
> to signal the API incompatibility.
>
> This breaks 3rd-party extensions that are yet to be ported to @command
> decorator.
>
> diff --git a/hgext/mq.py b/hgext/mq.py
> --- a/hgext/mq.py
> +++ b/hgext/mq.py
> @@ -3560,12 +3560,11 @@ def extsetup(ui):
>      entry = extensions.wrapcommand(commands.table, 'init', mqinit)
>      entry[1].extend(mqopt)
>
> -    nowrap = set(commands.norepo.split(" "))
> -
>      def dotable(cmdtable):
> -        for cmd in cmdtable.keys():
> +        for cmd, entry in cmdtable.iteritems():
>              cmd = cmdutil.parsealiases(cmd)[0]
> -            if cmd in nowrap:
> +            func = entry[0]
> +            if func.norepo:
>                  continue
>              entry = extensions.wrapcommand(cmdtable, cmd, mqcommand)
>              entry[1].extend(mqopt)
> diff --git a/mercurial/cmdutil.py b/mercurial/cmdutil.py
> --- a/mercurial/cmdutil.py
> +++ b/mercurial/cmdutil.py
> @@ -3264,24 +3264,13 @@ def command(table):
>      def cmd(name, options=(), synopsis=None, norepo=False, optionalrepo=False,
>              inferrepo=False):
>          def decorator(func):
> +            func.norepo = norepo
> +            func.optionalrepo = optionalrepo
> +            func.inferrepo = inferrepo
>              if synopsis:
>                  table[name] = func, list(options), synopsis
>              else:
>                  table[name] = func, list(options)
> -
> -            if norepo:
> -                # Avoid import cycle.
> -                import commands
> -                commands.norepo += ' %s' % ' '.join(parsealiases(name))
> -
> -            if optionalrepo:
> -                import commands
> -                commands.optionalrepo += ' %s' % ' '.join(parsealiases(name))
> -
> -            if inferrepo:
> -                import commands
> -                commands.inferrepo += ' %s' % ' '.join(parsealiases(name))
> -
>              return func
>          return decorator
>
> diff --git a/mercurial/commands.py b/mercurial/commands.py
> --- a/mercurial/commands.py
> +++ b/mercurial/commands.py
> @@ -29,18 +29,6 @@ table = {}
>
>  command = cmdutil.command(table)
>
> -# Space delimited list of commands that don't require local repositories.
> -# This should be populated by passing norepo=True into the @command decorator.
> -norepo = ''
> -# Space delimited list of commands that optionally require local repositories.
> -# This should be populated by passing optionalrepo=True into the @command
> -# decorator.
> -optionalrepo = ''
> -# Space delimited list of commands that will examine arguments looking for
> -# a repository. This should be populated by passing inferrepo=True into the
> -# @command decorator.
> -inferrepo = ''
> -
>  # label constants
>  # until 3.5, bookmarks.current was the advertised name, not
>  # bookmarks.active, so we must use both to avoid breaking old
> diff --git a/mercurial/dispatch.py b/mercurial/dispatch.py
> --- a/mercurial/dispatch.py
> +++ b/mercurial/dispatch.py
> @@ -496,11 +496,11 @@ class cmdalias(object):
>                  self.fn, self.opts = tableentry
>
>              self.args = aliasargs(self.fn, args)
> -            if cmd not in commands.norepo.split(' '):
> +            if not self.fn.norepo:
>                  self.norepo = False
> -            if cmd in commands.optionalrepo.split(' '):
> +            if self.fn.optionalrepo:
>                  self.optionalrepo = True
> -            if cmd in commands.inferrepo.split(' '):
> +            if self.fn.inferrepo:
>                  self.inferrepo = True
>              if self.help.startswith("hg " + cmd):
>                  # drop prefix in old-style help lines so hg shows the alias
> @@ -556,12 +556,6 @@ def addaliases(ui, cmdtable):
>              pass
>
>          cmdtable[aliasdef.name] = (aliasdef, aliasdef.opts, aliasdef.help)
> -        if aliasdef.norepo:
> -            commands.norepo += ' %s' % alias
> -        if aliasdef.optionalrepo:
> -            commands.optionalrepo += ' %s' % alias
> -        if aliasdef.inferrepo:
> -            commands.inferrepo += ' %s' % alias
>
>  def _parse(ui, args):
>      options = {}
> @@ -728,26 +722,16 @@ def _checkshellalias(lui, ui, args, prec
>
>      if precheck:
>          strict = True
> -        norepo = commands.norepo
> -        optionalrepo = commands.optionalrepo
> -        inferrepo = commands.inferrepo
> -        def restorecommands():
> -            commands.norepo = norepo
> -            commands.optionalrepo = optionalrepo
> -            commands.inferrepo = inferrepo
>          cmdtable = commands.table.copy()
>          addaliases(lui, cmdtable)
>      else:
>          strict = False
> -        def restorecommands():
> -            pass
>          cmdtable = commands.table
>
>      cmd = args[0]
>      try:
>          aliases, entry = cmdutil.findcmd(cmd, cmdtable, strict)
>      except (error.AmbiguousCommand, error.UnknownCommand):
> -        restorecommands()
>          return
>
>      cmd = aliases[0]
> @@ -758,8 +742,6 @@ def _checkshellalias(lui, ui, args, prec
>          return lambda: runcommand(lui, None, cmd, args[:1], ui, options, d,
>                                    [], {})
>
> -    restorecommands()
> -
>  _loaded = set()
>  def _dispatch(req):
>      args = req.args
> @@ -876,7 +858,7 @@ def _dispatch(req):
>
>      repo = None
>      cmdpats = args[:]
> -    if cmd not in commands.norepo.split():
> +    if not func.norepo:
>          # use the repo from the request only if we don't have -R
>          if not rpath and not cwd:
>              repo = req.repo
> @@ -897,9 +879,9 @@ def _dispatch(req):
>              except error.RepoError:
>                  if rpath and rpath[-1]: # invalid -R path
>                      raise
> -                if cmd not in commands.optionalrepo.split():
> -                    if (cmd in commands.inferrepo.split() and
> -                        args and not path): # try to infer -R from command args
> +                if not func.optionalrepo:
> +                    if func.inferrepo and args and not path:
> +                        # try to infer -R from command args
>                          repos = map(cmdutil.findrepo, args)
>                          guess = repos[0]
>                          if guess and repos.count(guess) == len(repos):
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