Re: [Gnu-arch-users] Fai update: now with shell mode

[Jan Hudec]

On Tue, Jul 27, 2004 at 13:49:22 -0400, Aaron Bentley wrote:
> Hi all,
> 
> Just thought I'd post a bit about ongoing Fai development.
> (If you're just tuning in, Fai is a text-based arch frontend.)
> 
> The current revision of Fai is;
> address@hidden/fai--dist--0.2--patch-18
> http://sourcecontrol.net/~abentley/archives/tlasrc/
> 
> Since the original announcement, I've added the "shell" subcommand, 
> which lauches an interactive shell for source management.  It features 
> completion for:
> - command names
> - native command argument names
> - native command positional parameters
> (It falls back to filename completion.)

Could there be a "complete" subcommand, that would allow non-interactive
call to the completion engine? It would allow easy implementation of
completion in shell, possibly emacs etc.

I think of something like:

fai complete [quoting] the-words

where "[quoting]" would be either --pika or --read and "the-words" would
be the command line up to cursor, broken up to individual arguments. 
If a new argument is to be completed, there would be empty argument ('')
at the end. The output would be:
<prefix>
<match1>
<match2>
...
<matchn>
Each of these would be escaped either using pika escapes or suitable for
the POSIX shell read builtin acoording to the first arg.
The possible arguments would be <prefix><match1> ... <prefix><matchn>.

> I haven't sorted out how to handle completion for external (aba) 
> commands, and I hope to have native replacements for all tla commands, 
> eventually.

Obviously, you can't complete arguments to a command, when you don't
know what arguments they have. Perhaps if they had some special
subcommand, say 'grammar', that gave you spec for the completion...

> [...]
> So far, I haven't had any feedback on Fai, positive or negative, but 
> comments are certainly welcome.  Give it a try!

Just gave it a try and got:
/home/bulb/src/fai/aba/commands/apply-changeset: 16: Syntax error: Bad 
substitution
Traceback (most recent call last):
  File "./fai", line 29, in ?
    usage()
  File "./fai", line 26, in usage
    commands.Help().do_command([])
  File "/home/bulb/src/fai/commands.py", line 123, in do_command
    self.list_commands(native, suggestions, external)
  File "/home/bulb/src/fai/commands.py", line 185, in list_commands
    fake_aba.list_commands()
  File "/home/bulb/src/fai/abacmds.py", line 55, in list_commands
    command.command_exec(['desc'])
  File "/home/bulb/src/fai/abacmds.py", line 135, in command_exec
    expected=expected)
  File "/home/bulb/src/fai/arch/util.py", line 66, in exec_safe
    proc.wait()
  File "/home/bulb/src/fai/arch/util.py", line 307, in wait
    raise ExecProblem(self)
  File "/home/bulb/src/fai/arch/util.py", line 47, in __init__
    error = proc.error.rstrip()
AttributeError: 'NoneType' object has no attribute 'rstrip'

The line in question is:
if [ "${1:0:1}" = "-" ] ; then

It has to be written as:
if expr "$1" : "-"; then

or the first line has to be:
#!/bin/bash

-------------------------------------------------------------------------------
                                                 Jan 'Bulb' Hudec 
<address@hidden>

signature.asc
Description: Digital signature