subcmds: stop instantiating at import time

The current subcmds design has singletons in all_commands.  This isn't
exactly unusual, but the fact that our main & help subcommand will then
attach members to the classes before invoking them is.  This makes it
hard to keep track of what members a command has access to, and the two
code paths (main & help) attach different members depending on what APIs
they then invoke.

Lets pull this back a step by storing classes in all_commands and leave
the instantiation step to when they're used.  This doesn't fully clean
up the confusion, but gets us closer.

Change-Id: I6a768ff97fe541e6f3228358dba04ed66c4b070a
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/259154
Tested-by: Mike Frysinger <vapier@google.com>
Reviewed-by: David Pursehouse <dpursehouse@collab.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/subcmds/help.py b/subcmds/help.py
index 5e24ed0b..1e16019a 100644
--- a/subcmds/help.py
+++ b/subcmds/help.py
@@ -43,7 +43,7 @@ Displays detailed usage information about a command.
     fmt = '  %%-%ds  %%s' % maxlen
 
     for name in commandNames:
-      command = all_commands[name]
+      command = all_commands[name]()
       try:
         summary = command.helpSummary.strip()
       except AttributeError:
@@ -134,7 +134,7 @@ Displays detailed usage information about a command.
 
   def _PrintAllCommandHelp(self):
     for name in sorted(all_commands):
-      cmd = all_commands[name]
+      cmd = all_commands[name]()
       cmd.manifest = self.manifest
       self._PrintCommandHelp(cmd, header_prefix='[%s] ' % (name,))
 
@@ -159,7 +159,7 @@ Displays detailed usage information about a command.
       name = args[0]
 
       try:
-        cmd = all_commands[name]
+        cmd = all_commands[name]()
       except KeyError:
         print("repo: '%s' is not a repo command." % name, file=sys.stderr)
         sys.exit(1)