commands: move commands.table to a separate module

Summary:
This allows `commands/__init__.py` and `commands/<command>.py` to both import
the module. So there is no need for `__init__.py` to manually update the
command table.

Reviewed By: kulshrax

Differential Revision: D15640719

fbshipit-source-id: 684983cf91006ec0d504cb01a5f616c0d1f7ac29

edenscm/mercurial/commands/__init__.py

@@ -17,16 +17,7 @@ import subprocess
 import sys
 import time
 
-from . import (
-    debug,
-    debugcheckoutidentifier,
-    debugmutation,
-    debugstatus,
-    debugstrip,
-    eden,
-    fs,
-    uncommit,
-)
+from . import cmdtable
 from .. import (
     archival,
     bookmarks,
@@ -64,30 +55,34 @@ from .. import (
     streamclone,
     tags as tagsmod,
     templatekw,
-    treestate,
     ui as uimod,
     util,
 )
+from ... import hgdemandimport
 from ..i18n import _
 from ..node import bin, hex, nullid, nullrev, short
 
 
+with hgdemandimport.disabled():
+    # Importing these modules have side effect on the command table.
+    from . import (  # noqa: F401
+        debug,
+        debugcheckoutidentifier,
+        debugmutation,
+        debugstatus,
+        debugstrip,
+        eden,
+        fs,
+        uncommit,
+    )
+
 release = lockmod.release
 
-table = {}
-table.update(debug.command._table)
+table = cmdtable.table
+command = cmdtable.command
 
-command = registrar.command(table)
 readonly = registrar.command.readonly
 
-table.update(uncommit.cmdtable)
-table.update(debugcheckoutidentifier.command._table)
-table.update(debugmutation.command._table)
-table.update(debugstatus.command._table)
-table.update(debugstrip.command._table)
-table.update(eden.command._table)
-table.update(fs.command._table)
-
 # common command options
 
 globalopts = [

edenscm/mercurial/commands/cmdtable.py

@@ -0,0 +1,12 @@
+# Copyright 2019 Facebook, Inc.
+#
+# 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 .. import registrar
+
+
+table = {}
+command = registrar.command(table)

edenscm/mercurial/commands/debug.py

@@ -53,7 +53,6 @@ from .. import (
     progress,
     pvec,
     pycompat,
-    registrar,
     repair,
     revlog,
     revset,
@@ -73,12 +72,11 @@ from .. import (
 )
 from ..i18n import _
 from ..node import bin, hex, nullhex, nullid, nullrev, short
+from .cmdtable import command
 
 
 release = lockmod.release
 
-command = registrar.command()
-
 try:
     xrange(0)
 except NameError:

edenscm/mercurial/commands/debugcheckoutidentifier.py

@@ -5,10 +5,7 @@
 
 from __future__ import absolute_import
 
-from .. import registrar
-
-
-command = registrar.command()
+from .cmdtable import command
 
 
 @command("debugcheckoutidentifier", [])

edenscm/mercurial/commands/debugmutation.py

@@ -7,11 +7,9 @@
 
 from __future__ import absolute_import
 
-from .. import mutation, node as nodemod, pycompat, registrar, scmutil, util, visibility
+from .. import mutation, node as nodemod, pycompat, scmutil, util, visibility
 from ..i18n import _
-
-
-command = registrar.command()
+from .cmdtable import command
 
 
 @command(b"debugmutation", [], _("[REV]"))

edenscm/mercurial/commands/debugstatus.py

@@ -3,11 +3,9 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
-from .. import error, registrar
+from .. import error
 from ..i18n import _
-
-
-command = registrar.command()
+from .cmdtable import command
 
 
 @command("debugstatus", [("n", "nonnormal", 0, _("print nonnormalfiltered samples"))])

edenscm/mercurial/commands/debugstrip.py

@@ -14,19 +14,17 @@ from .. import (
     merge,
     node as nodemod,
     pycompat,
-    registrar,
     repair,
     scmutil,
     util,
 )
 from ..i18n import _
+from .cmdtable import command
 
 
 nullid = nodemod.nullid
 release = lockmod.release
 
-command = registrar.command()
-
 
 def checklocalchanges(repo, force=False, excsuffix=""):
     cmdutil.checkunfinished(repo)

edenscm/mercurial/commands/eden.py

@@ -13,11 +13,9 @@ import struct
 import sys
 import time
 
-from .. import error, extensions, hg, pycompat, registrar, scmutil, txnutil, ui, util
+from .. import error, extensions, hg, pycompat, scmutil, txnutil, ui, util
 from ..i18n import _
-
-
-command = registrar.command()
+from .cmdtable import command
 
 
 if pycompat.iswindows:

edenscm/mercurial/commands/fs.py

@@ -10,11 +10,9 @@ from __future__ import absolute_import
 import errno
 import subprocess
 
-from .. import cmdutil, error, registrar
+from .. import cmdutil, error
 from ..i18n import _
-
-
-command = registrar.command()
+from .cmdtable import command
 
 
 @command("fs", [], subonly=True, norepo=True)

edenscm/mercurial/commands/uncommit.py

@@ -25,17 +25,13 @@ from .. import (
     copies,
     error,
     pycompat,
-    registrar,
     rewriteutil,
     scmutil,
     treestate,
 )
 from ..i18n import _
 from ..node import nullid
-
-
-cmdtable = {}
-command = registrar.command(cmdtable)
+from .cmdtable import command
 
 
 @command(