Re: pbuilder

[Jens Ruehmkorf <ruehmkorf@informatik.uni-koeln.de>]

Hi Dale,

> Anyone know how to make bash do a regexpr in a conditional?  I want to
> filter out *~ *.bak and such. Perl would do it roughly something like
> this (without bothering to check perlreg and perlop)
>
> if ( "*~"    =~ $file) {next;}
> if ( "*.bak" =~ $file) {next;}

You can use POSIX.2 basic regexp in bash(1).

I suppose you simply scan through all your files in hooks/ and want to
skip all backup files and such. It depends when you want to use that,
which pattern expansion/matching rules apply.

case uses "pathname expansion" as matching rules.

-- first scenario --
cd hooks/
for file in * ; do
  case $file in
    *~|*.bak)
      echo "W: Skip $file, seems to be a backup"
    ;;
    1st_pattern)
      do_1st $file
    ;;
    2nd_pattern)
      do_2nd $file
    ;;
    *)
      echo "Oops. Didn't recognize it."
    ;;
  esac
done
-- end --

If you always do the same but want to skip only the backup-files you may
do something like this:

-- 2nd scenario --
cd hooks/
shopt -s extglob
for file in !(*~|*.bak) ; do
  ...
done
shopt -u extglob
-- end --

Or you use GLOBIGNORE by specifying a colon seperated list of patterns
that should be ignored during pathname expansion. Don't forget to unset
GLOBIGNORE afterwords:

-- 3rd scenario --
cd hooks/
GLOBIGNORE=*~:*.bak:.??*
for file in * ; do
  ...
done
unset GLOBIGNORE
-- end --

For your problem, I would still prefer the 1st scenario with just a
default case-switch and another for the backup files (because it works
using the ash as well).

Well, play around with it some more. Since bash2 you can do almost
everything (well, erverything but fast scripts). Install bash-doc and have
a look at the examples.

Kind regards,
Jens

--
ruehmkorf at informatik dot uni hyphen koeln dot de