excluding .svn and symlinks from locate db

[Karl Berry]

Hi James,

As I wrote some time ago, I like to exclude .svn files and symbolic
links from the locate database (otherwise I'd have massive duplication
of hits).

Would you consider adding hooks to make this possible with the
distributed version?  I believe it would amount to two new environment
variables, one to allow for more stuff inside the prune expression, and
one to allow for more predicates outside.  Of course they'd be empty by
default.

The diff below (between stock 4.4.0 and the derived script that I
actually run) gives the flavor, although of course for any distributed
patch it would be generalized.  If you're amenable to the idea, I could
work on a real patch.  Wdyt?

Thanks,
Karl

*** /usr/local/gnu/bin/updatedb Mon Mar 24 09:07:06 2008
--- /l/etc/updatedb     Mon Mar 24 08:57:54 2008
***************
*** 110,114 ****
      then
          sort="/usr/local/gnu/bin/sort -z"
!         print_option="-print0"
          frcode_options="$frcode_options -0"
      else
--- 110,114 ----
      then
          sort="/usr/local/gnu/bin/sort -z"
!         print_option="-type f -print0"
          frcode_options="$frcode_options -0"
      else
***************
*** 253,262 ****
      su $LOCALUSER `select_shell $LOCALUSER` -c \
      "$find $SEARCHPATHS $FINDOPTIONS \
!      \\( $prunefs_exp \
       -type d -regex '$PRUNEREGEX' \\) -prune -o $print_option"
    else
      # : A2
      $find $SEARCHPATHS $FINDOPTIONS \
!      \( $prunefs_exp \
       -type d -regex "$PRUNEREGEX" \) -prune -o $print_option
    fi
--- 253,262 ----
      su $LOCALUSER `select_shell $LOCALUSER` -c \
      "$find $SEARCHPATHS $FINDOPTIONS \
!      \\( $prunefs_exp -type l -o \
       -type d -regex '$PRUNEREGEX' \\) -prune -o $print_option"
    else
      # : A2
      $find $SEARCHPATHS $FINDOPTIONS \
!      \( $prunefs_exp -type l -o \
       -type d -regex "$PRUNEREGEX" \) -prune -o $print_option
    fi
***************
*** 322,331 ****
      su $LOCALUSER `select_shell $LOCALUSER` -c \
      "$find $SEARCHPATHS $FINDOPTIONS \
!      \( $prunefs_exp \
       -type d -regex '$PRUNEREGEX' \) -prune -o $print_option" || exit $?
    else
      # : A6
      $find $SEARCHPATHS $FINDOPTIONS \
!      \( $prunefs_exp \
       -type d -regex "$PRUNEREGEX" \) -prune -o $print_option || exit $?
    fi
--- 322,331 ----
      su $LOCALUSER `select_shell $LOCALUSER` -c \
      "$find $SEARCHPATHS $FINDOPTIONS \
!      \( $prunefs_exp -type l -o \
       -type d -regex '$PRUNEREGEX' \) -prune -o $print_option" || exit $?
    else
      # : A6
      $find $SEARCHPATHS $FINDOPTIONS \
!      \( $prunefs_exp -type l -o \
       -type d -regex "$PRUNEREGEX" \) -prune -o $print_option || exit $?
    fi