#!/bin/sh -
#
# @(#)$Id: INSTALL 544 2008-11-02 17:31:17Z jneitzel $
#
# The author of this file, J.A. Neitzel <jan (at) v6shell (dot) org>,
# hereby grants it to the public domain.
#

#
# Install all of the osh and sh6 command files into the specified
# directory.  If any of sh6, glob6, if, goto, or fd2 cannot be found
# by which(1), convert all of the sh6 command files to run with osh
# instead.  It is an error if osh cannot be found by which(1).
#
# If an error is detected, exit with an appropriate diagnostic and
# a non-zero status.  
#
# usage: ./INSTALL directory
#

umask 0022
PROGNAME="`basename $0`"

if test X"$0" != X"INSTALL" -a X"$0" != X"./INSTALL" ; then
	echo "$PROGNAME: $0: Invalid INSTALL pathname." >&2 ; exit 1
fi
if test $# -ne 1 -o X"$1" = X ; then
	echo "usage: $PROGNAME directory" >&2 ; exit 1
fi
DIR="$1"
case "$DIR" in
tmp-$$)
	echo "$PROGNAME: $DIR: Reserved for internal use only." >&2 ; exit 1
	;;
/|/etc*|/bin|/sbin|/usr/bin|/usr/sbin|/opt*|/var*)
	echo "$PROGNAME: $DIR: May result in a system conflict."  >&2
	echo "Try a subdirectory of /usr/local or $HOME instead." >&2 ; exit 1
	;;
*)
	if test -d "$DIR" -a ! -w "$DIR" ; then
		echo "$PROGNAME: $DIR: Permission denied." >&2 ; exit 1
	fi
	;;
esac

if which . >/dev/null 2>&1 ; then
	echo "$PROGNAME: which: Invalid results." >&2 ; exit 1
fi
if ! which osh >/dev/null 2>&1 ; then
	echo "$PROGNAME: osh: Not found." >&2 ; exit 1
fi
test -d "$DIR" || mkdir -p "$DIR"
test $? -eq 0  || exit 1

if ! which sh6 glob6 if goto fd2 >/dev/null 2>&1 ; then
	# Convert each sh6 command file to run with osh instead.
	for OLD in *.sh6 ; do
		NEW="${OLD%.sh6}.osh"
		if test ! -e "$NEW" ; then
			echo "Converting \`$OLD' to \`$NEW' ..."
			<"$OLD" sed 's/sh6/osh/g' >"$NEW"
			test $? -eq 0 || exit 1
			NEWLIST="$NEWLIST $NEW"
		fi
	done
	mkdir tmp-$$ && mv *.sh6 tmp-$$/ || exit 1 ; echo
fi

#
# Install everything now.
#
INSTALL="`which install`"
   MODE="-m 0555"

for FILE in *.[os][sh][h6] ; do
	DEST="$DIR/${FILE%.*}"
	echo "$INSTALL -c $MODE	$FILE	$DEST"
	"$INSTALL" -c $MODE	"$FILE"	"$DEST"
	test $? -eq 0 || exit 1
	if test X"$FILE" = X"lf.osh" ; then
		echo "ln -fs lf $DIR/li && ln -fs lf $DIR/ll"
		ln -fs lf "$DIR/li" && ln -fs lf "$DIR/ll"
		test $? -eq 0 || exit 1
	fi
done

#
# Clean up if needed.
#
if test X"$NEWLIST" != X -a -d tmp-$$ ; then
	rm -f $NEWLIST && mv tmp-$$/*.sh6 ./ && rmdir tmp-$$
fi

#
# Advise user if $PATH does not contain absolute pathname of $DIR.
#
cd "$DIR"
case "$PATH" in
*`pwd`*);;
*)
cat <<EOI >&2

Prepend `pwd` to PATH
in order to successfully invoke all of the command files.

Appending `pwd` to PATH
is another option but is less useful in the general case.
EOI
;;
esac