Re: [PATCH 1/3] shell-completion: Add initial completion for kmod

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On Tue, Jul 30, 2013 at 11:25:27AM -0300, Lucas De Marchi wrote:
> On Tue, Jul 30, 2013 at 10:17 AM, Dave Reisner <d@xxxxxxxxxxxxxx> wrote:
> > On Tue, Jul 30, 2013 at 03:48:13AM -0300, Lucas De Marchi wrote:
> >> From: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
> >>
> >> Skeleton pulled from udevadm in systemd and adapted to kmod needs.
> >> ---
> >>  NEWS                       |  2 +-
> >>  shell-completion/bash/kmod | 53 ++++++++++++++++++++++++++++++++++++++++++++++
> >>  2 files changed, 54 insertions(+), 1 deletion(-)
> >>  create mode 100644 shell-completion/bash/kmod
> >>
> >> diff --git a/NEWS b/NEWS
> >> index 1dff366..491146d 100644
> >> --- a/NEWS
> >> +++ b/NEWS
> >> @@ -6,7 +6,7 @@ kmod 15
> >>
> >>  - New features:
> >>       - kmod static-nodes creates parent directories if given a -o option
> >> -     - kmod binary doesn't statically link to libkmod
> >> +     - kmod binary statically link to libkmod
> >>
> >>  kmod 14
> >>  =======
> >> diff --git a/shell-completion/bash/kmod b/shell-completion/bash/kmod
> >> new file mode 100644
> >> index 0000000..81dbf46
> >> --- /dev/null
> >> +++ b/shell-completion/bash/kmod
> >> @@ -0,0 +1,53 @@
> >> +# kmod completion                                          -*- shell-script -*-
> >> +#
> >> +# This file is part of systemd.
> >> +#
> >> +# Copyright 2010 Ran Benita
> >> +# Copyright (C) 2013  Intel Corporation. All rights reserved.
> >> +#
> >> +# systemd is free software; you can redistribute it and/or modify it
> >> +# under the terms of the GNU Lesser General Public License as published by
> >> +# the Free Software Foundation; either version 2.1 of the License, or
> >> +# (at your option) any later version.
> >> +#
> >> +# systemd is distributed in the hope that it will be useful, but
> >> +# WITHOUT ANY WARRANTY; without even the implied warranty of
> >> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> >> +# General Public License for more details.
> >> +#
> >> +# You should have received a copy of the GNU Lesser General Public License
> >> +# along with systemd; If not, see <http://www.gnu.org/licenses/>.
> >> +
> >> +__contains_word () {
> >> +    local word=$1; shift
> >> +    for w in $*; do [[ $w = $word ]] && return 0; done
> >
> > Should be "$@", not $*, and "$word", not $word.
> 
> As said in the commit message, this was taken from systemd. You may
> want to change there as well ;-)
> 

Yeah, been meaning to do that for a while now.

> >
> >> +    return 1
> >> +}
> >> +
> >> +_kmod() {
> >> +    local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
> >> +    local verb comps
> >> +
> >> +    local -A VERBS=(
> >> +     [HELP]='help'
> >> +     [LIST]='list'
> >> +     [STATIC-NODES]='static-nodes'
> >
> > It seems you have tabs here instead of spaces. I think you probably want
> 
> It seems like emacs is not passing the experimentation period.
> 
> > the top level actions in a single list, not broken out like this.
> > Subsequent options for the toplevel actions would want to be broken out
> > in an associative array like you have here.
> 
> But then how can I take the different actions needed by -f, -o?

Writing completion for a "multi-call" tool like this is painful. I'd
suggest switching on the verb and writing a separate function for each
one. I guess udevadm does something similar to this, but it doesn't mean
I have to agree with it ;) It's a strange mapping, and I don't really
see what it accomplishes.

> Lucas De Marchi
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