#! /bin/sh
### -*-sh-*-
###
### Find files which could be links to the repository
###
### (c) 1997 Mark Wooding
###

###----- Licensing notice ---------------------------------------------------
###
### This file is part of the Common Files Distribution (`common').
###
### `Common' is free software; you can redistribute it and/or modify
### it under the terms of the GNU General Public License as published by
### the Free Software Foundation; either version 2 of the License, or
### (at your option) any later version.
###
### `Common' is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
### GNU General Public License for more details.
###
### You should have received a copy of the GNU General Public License
### along with `common'; if not, write to the Free Software Foundation,
### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

set -e

pkgdatadir="@pkgdatadir@"
VERSION="@VERSION@"

###--------------------------------------------------------------------------
### Parse command line arguments.

while [ $# -gt 0 ]; do
  case "$1" in
    -h | --h | --he | --hel | --help)
      cat <<EOF
Usage: findlinks

Scans the current directory and any subdirectories, writing the names of
files which could be linked into the shared files repository to standard
output.  This list could be used as input to the \`mklinks' command.
EOF
      exit 0
      ;;
    -v | --v | --ve | --ver | --vers | --versi | --versio | --version)
      echo "findlinks: Common Files Distribution version $VERSION"
      exit 0
      ;;
    *)
      echo "findlinks: unknown option \`$1'" >&2
      exit 1
      ;;
  esac
  shift
done

###--------------------------------------------------------------------------
### Read the names of all the files I support.
###
###
### Yes, this is ugly and hacky: well spotted.  Shells have a nasty habit of
### spontaneously forking when redirection gets too hard for them to think
### about, so instead of something nice along the lines of
###
###   find ... | while read name; do <build `files'> done
###
### I have to stick the whole lot in backticks and echo the result when it's
### all done.  Yuk.
###
### Oh, I almost forgot: that colon on the end there, that's to make sure
### that all the entries are surrounded by colons on both sides, which makes
### the pattern match in the `case' below work properly.

files=$(
  files=""
  find "$pkgdatadir" -type f -print | {
    while read name; do
      files="$files:$(echo "$name" | sed 's;^.*/;;')"
    done
    echo $files
  }
):

###--------------------------------------------------------------------------
### Now examine the current directory.
###
### Remember to include things which are already linked, so that users can
### say `findlinks >.links' without any problems.

find . \( -type f -o -type l \) -print | while read name; do
  base="$(echo "$name" | sed 's;^.*/;;')"
  case "$files" in
    *:$base:*)
      echo $name
      ;;
    *)
  esac
done | sed 's,^\./,,' | sort

###----- That's all, folks --------------------------------------------------