#!/bin/sh
##############################################################################
# Copyright 2019-2022,2025 Thomas E. Dickey                                  #
# Copyright 1998-2011,2017 Free Software Foundation, Inc.                    #
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##############################################################################
# $Id: capconvert,v 1.13 2025/06/14 15:16:35 tom Exp $
#
# capconvert -- automated conversion from termcap to terminfo
#

echo "This script tries to automatically set you up so that your applications"
echo "that now use termcap can use terminfo and the ncurses library."
echo ""

# Note, except for telling if we're running under xterm we don't use TERM at
# all.  This is because BSD users not infrequently have multiple termtypes
# selected by conditionals in tset -- unless they're xterm users, in which
# case they're on a workstation and probably don't.

# Check to make sure TERMINFO is not already defined
if [ -n "$TERMINFO" ]
then
	echo "TERMINFO is already defined in your environment.  This means"
	echo "you already have a local terminfo tree, so you do not need any"
	echo "conversion."
	if [ ! -d "$TERMINFO" ] ; then
		echo "Caution: TERMINFO does not point to a directory!"
	fi
	exit;
fi

# Check to see if terminfo is present in one of the standard locations.
terminfo=no
for p in $TERMINFO \
	/usr/lib/terminfo \
	/usr/share/lib/terminfo \
	/usr/share/terminfo \
	/usr/local/lib/terminfo \
	/usr/local/share/terminfo
do
	if [ -d "$p" ] ; then
		terminfo=yes
		break
	fi
done

if [ $terminfo = yes ]
then
	echo "Your system already has a system-wide terminfo tree."
	echo ""
	if [ -z "$TERMCAP" ]
	then
		echo "You have no TERMCAP variable set, so we are done."
		# Assumes the terminfo master covers all canned terminal types
		exit;
	fi
	case $TERM in
	xterm | xterm-*)
		echo "You are running xterm, which usually sets TERMCAP itself."
		echo "We can ignore this, because terminfo knows about xterm."
		echo "So you will just use the system-wide terminfo tree."
		exit
		;;
	*)
		echo "We will have to make a local one for you anyway, to capture the effect"
		echo "of your TERMCAP variable."
		;;
	esac
else
	echo "No system-wide terminfo tree.  We will make you a local one."
fi
echo "";

# Check if test -x works (it is not portable, but useful)
OPT="-x"
TMP="test$$"; touch "$TMP" && chmod 755 "$TMP"
if test $OPT $TMP ; then
	chmod 644 $TMP
	test $OPT $TMP && OPT="-f"
else
	OPT="-f"
fi
rm -f $TMP

# First step -- go find tic
TIC=
IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
for x in $PATH .
do
	if test "$OPT" "$x"/tic
	then
		TIC=$x/tic
		break
	fi
done
IFS="$save_ifs"

if [ -n "$TIC" ]
then
	echo "I see tic at $TIC."
	case $TIC in # (vi
	./tic)
		if test $OPT ../misc/shlib ; then
			TIC="../misc/shlib $TIC"
		fi
		;;
	esac
else
	echo "You do not have tic installed anywhere I can see, please fix that."
	exit;
fi
echo "";

# We have tic.  Either there's no system terminfo tree or there is one but
# the user has a TERMCAP variable that may modify a stock description.
#

# Make the user a terminfo directory
if [ -d "$HOME"/.terminfo ]
then
	echo "It appears you already have a private terminfo directory"
	echo "at $HOME/.terminfo; this seems odd, because TERMINFO"
	echo "is not defined.  I am not going to second-guess this -- if you"
	echo "really want me to try auto-configuring for you, remove or"
	echo "rename $HOME/terminfo and run me again."
	exit;
else
	echo "I am creating your private terminfo directory at $HOME/.terminfo"
	mkdir "$HOME"/.terminfo
	# Ensure that that's where tic's compilation results.
	# This isn't strictly necessary with a 1.9.7 or later tic.
	TERMINFO="$HOME/.terminfo"; export TERMINFO
fi
echo "";

# Find a terminfo source to work from
if [ -f ../misc/terminfo.src ]
then
	echo "I see the terminfo master source is handy; I will use that."
	master=../misc/terminfo.src
else
	# Ooops...looks like we're running from somewhere other than the
	# progs directory of an ncurses source tree.
	master=`find "$HOME" -name "*terminfo.src" -print`
	mcount=`find "$HOME" -name "*terminfo.src" | wc -l`
	case $mcount in
	0)
		echo "I can not find a terminfo source file anywhere under your home directory."
		echo "There should be a file called terminfo.src somewhere in your"
		echo "ncurses distribution; please put it in your home directotry"
		echo "and run me again (it does not have to live there permanently)."
		exit;
	;;
	1)
		echo "I see a file called $master."
		echo "I am going to assume this is the terminfo source included with"
		echo "the ncurses distribution.  If this assumption is wrong, please"
		echo "interrupt me now!  OK to continue?"
		read answer;
	;;
	2)
		echo "I see more than one possible terminfo source.  Here they are:"
		echo "$master" | sed "/^/s//	/";
		while :
		do
			echo "Please tell me which one to use:"
			read master;
			if [ -f "$master" ]
			then
				break
			else
				echo "That file does not exist. Try again?";
			fi
		done
	;;
	esac
fi
echo "";

# Now that we have a master, compile it into the local tree
echo "OK, now I will make your private terminfo tree.  This may take a bit..."
#
# Kluge alert: we compile terminfo.src in two pieces because a lot of machines
# with < 16MB RAM choke on tic's core-hog habits.
trap 'rm -f tsplit$$.*; exit 1' 1 2 3 15
trap 'rm -f tsplit$$.*' 0
sed -n "$master" \
	-e '1,/SPLIT HERE/w '"tsplit$$.01" \
	-e '/SPLIT HERE/,$w '"tsplit$$.02" \
	2>/dev/null
for x in ./tsplit$$.*; do eval "$TIC" "$x"; done
rm ./tsplit$$.*
trap EXIT INT QUIT TERM HUP
#
echo "You now have a private tree under $HOME/.terminfo;"
echo "the ncurses library will automatically read from it,"
echo "and ncurses tic will automatically compile entries to it."

# We're done unless user has a .termcap file or equivalent named by TERMCAP
if [ -z "$TERMCAP" ]
then
	echo "You have no TERMCAP set, so we are done."
fi

# OK, here comes the nasty case...user has a TERMCAP.  Instead of
# trying to follow all the convolutions of the relationship between
# TERM and TERMCAP (partly because it is too painful, and partly because
# we don't actually know what TERM will be nor even if it always has
# the same value for this user) we do the following three steps...

if [ -f "$HOME"/.termcap ]
then
	echo "I see you have a \$HOME/.termcap file.  I will compile that."
	eval "$TIC" "$HOME"/.termcap
	echo "Done."
	echo "Note that editing $HOME/.termcap will no longer change the data curses sees."
elif [ -f "$TERMCAP" ]
then
	echo "Your TERMCAP names the file $TERMCAP.  I will compile that."
	eval "$TIC" "$TERMCAP"
	echo "Done."
	echo "Note that editing $TERMCAP will no longer change the data curses sees."
else
	echo "Your TERMCAP value appears to be an entry in termcap format."
	echo "I will compile it."
	echo "$TERMCAP" >myterm$$
	eval "$TIC" myterm$$
	rm myterm$$
	echo "Done."
	echo "Note that editing TERMCAP will no longer change the data curses sees."
fi
echo "To do that, decompile the terminal description you want with infocmp(1),"
echo "edit to taste, and recompile using tic(1)."

# capconvert ends here

