204 lines
4.8 KiB
Bash
Executable File
204 lines
4.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# play tic-tac-toe
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# parse args
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#
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export USAGE="usage: $0 [-h] [-e] <command>
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-h show this help and exit
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-e show compiler stdout
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commands:
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./ttt [move_digit] play a place
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./ttt quitgame quit the game
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./ttt clobber clean the state of the game
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"
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export E_FLAG=
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while getopts :he flag; do
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case "$flag" in
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h) echo "$USAGE" 1>&2
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exit 2
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;;
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e) E_FLAG="1"
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;;
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\?) echo "$0: ERROR: invalid option: -$OPTARG" 1>&2
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exit 3
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;;
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:) echo "$0: ERROR: option -$OPTARG requires an argument" 1>&2
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exit 3
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;;
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*)
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;;
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esac
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done
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# check args
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#
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shift $(( OPTIND - 1 ));
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if [[ $# -gt 1 ]]; then
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echo "$USAGE" 1>&2
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exit 1
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elif [[ $# -eq 1 ]]; then
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move="$1"
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else
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move=
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fi
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# catch the clobber case
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#
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if [[ clobber = "$move" ]]; then
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echo "ttt: rm -f ttt_game ttt_game.o ttt_game.c ttt_old.c ttt_new.c" 1>&2
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rm -f ttt_game ttt_game.o ttt_game.c ttt_old.c ttt_new.c
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echo "ttt: rm -f merlyn.c merlyn.o merlyn" 1>&2
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rm -f merlyn.c merlyn.o merlyn
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echo "ttt: removed all but the original source" 1>&2
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exit 0
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fi
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# catch the quitgame case
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#
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if [[ quitgame = "$move" ]]; then
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echo "ttt: rm -f ttt_game ttt_game.o ttt_game.c ttt_old.c ttt_new.c" 1>&2
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rm -f ttt_game ttt_game.o ttt_game.c ttt_old.c ttt_new.c
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echo "ttt: current game removed, perhaps you were going to lose? :-)" 1>&2
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exit 0
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fi
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# watch for bad args
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#
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if [[ $# -eq 1 ]]; then
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case "$move" in
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1|2|3|4|5|6|7|8|9) ;;
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*) echo "ttt: bad argument" 1>&2
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echo "usage: ./ttt [move_digit]" 1>&2
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echo " ./ttt quitgame" 1>&2
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echo " ./ttt clobber" 1>&2
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exit 2 ;;
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esac
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fi
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# be sure that we have the merlyn.c source
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#
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if [[ ! -f merlyn.c ]]; then
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if [[ -f westley.c ]]; then
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echo "ttt: No merlyn.c around these parts, using a copy of westley.c" 1>&2
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cp westley.c merlyn.c
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chmod +w merlyn.c
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else
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echo "ttt: Ouch! merlyn.c and no westley.c are gone!" 1>&2
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exit 3
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fi
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# check to see if the copy worked
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if [[ ! -f merlyn.c ]]; then
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echo "ttt: Darn, couldn't copy westley.c to merlyn.c" 1>&2
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exit 4
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fi
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fi
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# be sure we have the merlyn program
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#
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if [[ ! -f merlyn ]]; then
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export status=0
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if [[ -n $E_FLAG ]]; then
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echo "ttt: make merlyn" 1>&2
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make merlyn
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status=$?
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else
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make merlyn 2>/dev/null
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status=$?
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fi
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if [[ "$status" -ne 0 ]]; then
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echo "ttt: something is wrong, fix merlyn.c and build it yourself!" 1>&2
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echo " or maybe type: ./ttt clobber" 1>&2
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exit 5
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fi
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rm -f ttt_game.c
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fi
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# If we don't have a ttt_game.c, or we cannot write it, make a new ttt_game.c
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#
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if [[ ! -w ttt_game.c ]]; then
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rm -f ttt_game.c
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if [[ -z "$move" ]]; then
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./merlyn | tee ttt_game.c
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else
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./merlyn "$move" | tee ttt_game.c
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fi
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chmod +w ttt_game.c
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# If we have a ttt_game.c, then assume that we are in the process of playing
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#
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else
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rm -f ttt_game ttt_new.c
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export status=0
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if [[ -n $E_FLAG ]]; then
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echo "ttt: make ttt_game" 1>&2
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make ttt_game
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status=$?
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else
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make ttt_game 2>/dev/null
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status=$?
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fi
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if [[ "$status" -ne 0 ]]; then
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echo "ttt: something is wrong, fix ttt_game.c and build it yourself!" 1>&2
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echo " or maybe type: ./ttt quitgame" 1>&2
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exit 6
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fi
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if [[ -z "$move" ]]; then
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./ttt_game | tee ttt_new.c
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else
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./ttt_game "$move" | tee ttt_new.c
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fi
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chmod +w ttt_new.c
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if [[ -s ttt_new.c ]]; then
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mv ttt_game.c ttt_old.c
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mv ttt_new.c ttt_game.c
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# Check for win, lose, or draw
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# For a win or draw, copy merlyn.c to ttt_game.c
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# For a loss, copy ttt_game.c to merlyn.c, as it is now better
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# Also remove the executable for the file replaced
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# For anything else, game in progress, do not do anything
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# SC2006 (style): Use $(...) notation instead of legacy backticks `...`.
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# https://www.shellcheck.net/wiki/SC2006
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# shellcheck disable=SC2006
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if [[ -n "`grep ':-(' ttt_game.c`" ]]; then
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echo
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echo "ttt: I lose...I won't make THAT mistake again!"
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chmod +w merlyn.c
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mv ttt_game.c merlyn.c
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rm -f merlyn ttt_game
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else
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# SC2006 (style): Use $(...) notation instead of legacy backticks `...`.
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# https://www.shellcheck.net/wiki/SC2006
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# shellcheck disable=SC2006
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if [[ -n "`grep ':-)' ttt_game.c`" ]]; then
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echo
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echo "ttt: I win!"
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cp merlyn.c ttt_game.c
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rm -f ttt_game
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else
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# SC2006 (style): Use $(...) notation instead of legacy backticks `...`.
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# https://www.shellcheck.net/wiki/SC2006
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# shellcheck disable=SC2006
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if [[ -z "`grep 'X=-. ' ttt_game.c`" && -z "`grep '^. ' ttt_game.c`" ]]; then
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echo
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echo "ttt: It's a draw - play again?"
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cp merlyn.c ttt_game.c
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rm -f ttt_game
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fi
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fi
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fi
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else
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echo "ttt: something is wrong, maybe ttt_old.c will help" 1>&2
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echo " or maybe type: ./ttt quitgame" 1>&2
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echo " or maybe type: ./ttt clobber" 1>&2
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exit 7
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fi
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fi
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