#!/bin/sh
# $Id$
# (c) 2000..2005, Christoph Berg <cb@df7cb.de>
# This program is free software covered by the GNU GPL.
# cb 2005-05-24: use PREFIXES, general cleanup

# This sh script uses lots of -d test to find all strange places where binaries
# and other stuff are located. ~/.path-local can be used to add local prefixes
# and single directories.

# get canonized OS name
[ -z "$OS" ] && . $HOME/bin/os > /dev/null

# some defaults
PREFIXES="$HOME:/usr/local:/usr/pkg:/usr::/usr/X11R6:/usr/openwin"
# :: is /, /usr/pkg NetBSD, /usr/openwin Solaris
PATH_PRELOAD="$HOME/bin/${OS:-/not/found/}" # my arch-dependent binaries
PATH="$PATH:/usr/ucb:/usr/5bin:/usr/games" # some strange locations
# in theory, manpath should make this script mostly redundant, but this does
# not work for $HOME/man etc.
if type manpath > /dev/null 2>&1 ; then
	save="$MANPATH"
	unset MANPATH
	MANPATH="$save:`manpath 2> /dev/null`"
fi
TMPDIRS="/tmp/$USER:$HOME/tmp" # where to find a better /tmp

# file for local additions
[ -f $HOME/.path-local ] && . $HOME/.path-local

#echo PATH=$PATH
#echo MANPATH=$MANPATH
#echo INFOPATH=$INFOPATH

IFS_SAVE=$IFS
IFS=":"

# returns true if the directory exists and is not yet in the first argument
test_dir () {
	case :$1: in
		*:$2:*) return 1 ;;
		*) [ -d "$2" ] ; return $? ;;
	esac
}

save=$PATH
PATH="" # cannot unset PATH on SunOS 4
for dir in $PATH_PRELOAD ; do
	test_dir "$PATH" "$dir" && PATH="$PATH${PATH:+:}$dir"
done
for dir in $PREFIXES ; do
	test_dir "$PATH" "$dir/bin" && PATH="$PATH${PATH:+:}$dir/bin"
	test_dir "$PATH" "$dir/sbin" && PATH="$PATH${PATH:+:}$dir/sbin"
done
for dir in $save ; do
	test_dir "$PATH" "$dir" && PATH="$PATH${PATH:+:}$dir"
done
unset PATH_PRELOAD
export PATH

save=$MANPATH
unset MANPATH
for dir in $PREFIXES ; do
	test_dir "$MANPATH" "$dir/share/man" && MANPATH="$MANPATH${MANPATH:+:}$dir/share/man"
	# test for /usr/man = /usr/share/man (BUG: fails for other symlinks)
	[ -h "$dir/man" ] && continue # -h, because -L fails on SunOS 4
	test_dir "$MANPATH" "$dir/man" && MANPATH="$MANPATH${MANPATH:+:}$dir/man"
done
for dir in $save ; do
	[ -h "$dir" ] && continue
	test_dir "$MANPATH" "$dir" && MANPATH="$MANPATH${MANPATH:+:}$dir"
done
export MANPATH

save=$INFOPATH
unset INFOPATH
for dir in $PREFIXES ; do
	test_dir "$INFOPATH" "$dir/share/info" && INFOPATH="$INFOPATH${INFOPATH:+:}$dir/share/info"
	test_dir "$INFOPATH" "$dir/info" && INFOPATH="$INFOPATH${INFOPATH:+:}$dir/info"
done
for dir in $save ; do
	test_dir "$INFOPATH" "$dir" && INFOPATH="$INFOPATH${INFOPATH:+:}$dir"
done
export INFOPATH

# really ugly, broken workaround for SunOS 4
if [ -f /bin/test ] ; then TEST=/bin/test ; else TEST=test ; fi
for dir in $TMPDIRS ; do
	if [ -d $dir ] && $TEST -O $dir ; then
		export TEMP=$dir TMP=$dir TMPDIR=$dir
		break
	fi
done
unset TMPDIRS TEST

#unset TEXINPUTS
#for dir in \
#	$HOME/lib/latex $HOME/lib/latex/*
#	do case $dir in
#		*CVS) ;;
#		*) [ -d $dir ] && TEXINPUTS="${TEXINPUTS}:$dir" ;;
#	esac	# $TEXINPUTS must start with ':'
#done
#export TEXINPUTS

#if [ -f $HOME/lib/make/Makefile ] ; then
#	MAKEFILES=$HOME/lib/make/Makefile
#	export MAKEFILES
#fi

IFS=$IFS_SAVE
unset test_dir dir save IFS_SAVE PREFIXES

#echo PATH=$PATH
#echo MANPATH=$MANPATH
#echo INFOPATH=$INFOPATH