From 10270fb7bc611aa253571c9aad6b154d08471577 Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Wed, 14 Jan 2015 18:43:24 -0800
Subject: Support --standalone-only option.

This option allows one to just generate a standalone
program for testing a decider.
---
 genprog.sh | 49 +++++++++++++++++++++++++++++++++++++------------
 1 file changed, 37 insertions(+), 12 deletions(-)

diff --git a/genprog.sh b/genprog.sh
index 6a78a2b..96216f2 100755
--- a/genprog.sh
+++ b/genprog.sh
@@ -29,11 +29,31 @@ set -e # stop on any errors
 MYDIR=$(dirname "$0")
 
 CFLAGS="-Wall -W -ansi -Wno-unused -Wstrict-prototypes -Wmissing-prototypes"
+STANDALONE_ONLY=
 
 . "$MYDIR"/lib.sh
 
+while [ $# -ge 1 ] ; do
+  case "$1" in
+  --standalone-only )
+    STANDALONE_ONLY=y
+    shift
+    ;;
+  --* | -* )
+    printf "%s: unrecognized option %s\n" "$0" "$1"
+    exit 1
+    ;;
+  * )
+    break
+    ;;
+  esac
+done
+
 if [ $# != 2 ] ; then
-  printf "usage: $0 <halting_decider>.c <error_decider.c>\n"
+  printf "usage: %s [ <options> ] <halting_decider>.c <error_decider.c>\n" "$0"
+  printf "options:\n"
+  printf "  --standalone-only   generate only stand-alone decider, compile it,\n"
+  printf "                      and do not execute it.\n"
   exit 1
 fi
 
@@ -57,8 +77,10 @@ STANDALONE_DECIDER_BASENAME=sa-${HD_HASH}
 
 printf "halting decider: %s\n" $HALTING_DECIDER
 printf "error decider: %s\n" $ERROR_DECIDER
-printf "\n"
-printf "generating program %s from these deciders\n" $PROGRAM_BASENAME.c
+
+if [ -z "$STANDALONE_ONLY" ] ; then
+  printf "\n"
+  printf "generating program %s from these deciders\n" $PROGRAM_BASENAME.c
 
 cat > ${PROGRAM_BASENAME}.c <<!
 #include <stdio.h>
@@ -122,8 +144,9 @@ int main(int argc, char **argv)
 #include "$HALTING_DECIDER"
 !
 
-printf "compiling %s to %s\n" $PROGRAM_BASENAME.c $PROGRAM_BASENAME
-gcc $CFLAGS $PROGRAM_BASENAME.c -o $PROGRAM_BASENAME
+  printf "compiling %s to %s\n" $PROGRAM_BASENAME.c $PROGRAM_BASENAME
+  gcc $CFLAGS $PROGRAM_BASENAME.c -o $PROGRAM_BASENAME
+fi
 
 printf "\n"
 
@@ -163,14 +186,16 @@ int main(int argc, char **argv)
 printf "compiling %s to %s\n" $STANDALONE_DECIDER_BASENAME.c $STANDALONE_DECIDER_BASENAME
 gcc $CFLAGS $STANDALONE_DECIDER_BASENAME.c -o $STANDALONE_DECIDER_BASENAME
 
-printf "\n"
+if [ -z "$STANDALONE_ONLY" ] ; then
+  printf "\n"
 
-printf "executing stand alone decider: %s %s %s\n" \
-  ./$STANDALONE_DECIDER_BASENAME $PROGRAM_BASENAME.c $PROGRAM_BASENAME.c
+  printf "executing stand alone decider: %s %s %s\n" \
+    ./$STANDALONE_DECIDER_BASENAME $PROGRAM_BASENAME.c $PROGRAM_BASENAME.c
 
-./$STANDALONE_DECIDER_BASENAME $PROGRAM_BASENAME.c $PROGRAM_BASENAME.c
+  ./$STANDALONE_DECIDER_BASENAME $PROGRAM_BASENAME.c $PROGRAM_BASENAME.c
 
-printf "\n"
+  printf "\n"
 
-printf "executing test case %s %s\n" ./$PROGRAM_BASENAME $PROGRAM_BASENAME.c
-./$PROGRAM_BASENAME $PROGRAM_BASENAME.c
+  printf "executing test case %s %s\n" ./$PROGRAM_BASENAME $PROGRAM_BASENAME.c
+  ./$PROGRAM_BASENAME $PROGRAM_BASENAME.c
+fi
-- 
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