Re: how to map sh-mode to mean bash-mode

[Kevin Rodgers <kevin.d.rodgers@gmail.com>]

On 7/17/11 8:25 AM, Perry Smith wrote:
>
> On Jul 17, 2011, at 4:26 AM, Andreas Röhler wrote:
>
>> Am 16.07.2011 01:58, schrieb jidanni@jidanni.org:
>>> $ touch a.sh a.bash
>>> $ emacs -nw -Q a.bash a.sh
>>> See they are in different modeline modes?
>>> How can I make them both bash mode?
>>> No matter if it is filename prefix, or #!/bin/sh or whatever.
>>> I tried defalias, and it didn't work.
>>>
>>>
>>
>> Hi,
>>
>> AFAIU you want a bash-specific editing environment.
>> I'm interested in that question, as delivered some shell-script tools.
>> Maybe have a look at
>>
>> sh-beg-end.el  at https://launchpad.net/s-x-emacs-werkstatt/
>>
>> BTW, what should such bash-mode do, what sh-mode and shell-script-mode do not?
>
> I'm curious on this too but... emacs looks at the #! line as well as the suffix.  So if you do:
>
> echo '#!/bin/bash'>  f1.sh
> echo '#!/bin/bash'>  f2.bash
>
> and then edit them, both put you into bash mode.  And:
>
> echo '#!/bin/bash'>  f3
>
> (no suffix) will put you into bash mode too as well as
>
> echo '#!/usr/bin/env bash'>  f4
>
> (more complicated interpretation of the #! line)
>
> Likewise:
>
> echo '#!/usr/bin/env ruby'>  f5
>
> will put you into Ruby mode when editing f5.
>
> My curiosity is where is all this magic done so I could tweak it if I needed to?  I know about file-mode-alist but that is just the suffix mapping part.  What is interpreting the #! of a file?

C-h v interpreter-mode-alist
C-h v auto-mode-interpreter-regexp

-- 
Kevin Rodgers
Denver, Colorado, USA