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@jbenet @mappum

Yeah, there's some duplicated work. But there's also a separation of
concerns. In one case, we check to determine where the command should
run. In the other case, we check to determine which hooks should run.
Having these actions separated reduces complexity in a nice way.

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

impl errorf

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

return a debug error

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

not immediately useful, but nice to have

tagging you to make sure i didn't make a mistake here @jbenet

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

This commit adds the pretty-complicated decision function
to check whether a command should run on the daemon.

@maybebtc @mappum double check the logic?

Discovered this quirk about interfaces.

@whyrusleeping
@mappum
@jbenet

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

Also:
- map[cmds.EncodingType]cmds.Marshaller -> MarshalMap

cc @mappum @maybebtc

Attention @maybebtc @mappum

I cleaned up + simplified the main flow. Now, all printing
is contained inside main itself! (:cheer:). I do this with
the help of a cmdInvocation struct that has both
a Parse and Run. The only major clunkiness left is that the
"CallCommand" is still its own function. But *shrug*.

Please test it works as we would expect. i changed much of
the flow, so likely that i missed a complicated edge case.

main roadmap:
- parse the commandline to get a cmdInvocation
- if user requests, help, print it and exit.
- run the command invocation
- output the response
- if anything fails, print error, maybe with help

@mappum

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

* bring debug checking back to top level so we have more control over
  CPU profiling.

* bring help text up to top level so we can exit from the program
  at the top level instead of within an arbitrary function