Re: Shell Mode keywords

[Tassilo Horn <tsdh@gnu.org>]

Raffaele Ricciardi <rfflrccrd@gmail.com> writes:

> Shell Mode defines these keywords:
>
> (defvar shell-font-lock-keywords
>   '(("[ \t]\\([+-][^ \t\n]+\\)" 1 font-lock-comment-face)
>     ("^[^ \t\n]+:.*" . font-lock-string-face)
>     ("^\\[[1-9][0-9]*\\]" . font-lock-string-face))
>   "Additional expressions to highlight in Shell mode.")
>
> I infer that the first regexp is meant to match command options.
> What is the purpose of the other two regexps?

Many commands print informative messages like

  tool: this is some message
  [17] I refer to line/PID/process no 17

which are then highlighted with the string face.  For example, with make
the information messages such as

  make[2]: Entering directory '/home/horn/Repos/el/emacs/admin/unidata'
  make[2]: Nothing to be done for 'charscript.el'.
  make[2]: Leaving directory '/home/horn/Repos/el/emacs/admin/unidata'

are shown like so whereas the actual commands make performs are printed
in the default face, e.g.,

  make -C ../admin/charsets eucjp-ms.el

where the -C option is highlighted according to the first regex.

Bye,
Tassilo