#! /bin/sh

# This test checks that dependent files are updated before including
# in the distribution. `parse.c' depends on `parce.y'. The later is
# updated so that `parse.c' should be rebuild. Then we are running
# `make' and `make distdir' and check whether the version of `parse.c'
# to be distributed is up to date.

. $srcdir/defs || exit 1

# Fail gracefully if no autoconf.
$needs_autoconf
# Likewise for some other tools.
(gcc -v) > /dev/null 2>&1 || exit 77
(bison -V) > /dev/null 2>&1 || exit 77

cat > configure.in << 'END'
AC_INIT
AC_CONFIG_AUX_DIR([.])
AM_INIT_AUTOMAKE(foo, 0.1)
PACKAGE=foo
VERSION=0.1
AC_PROG_CC
AC_PROG_YACC
AC_OUTPUT(Makefile)
END

cat > Makefile.am << 'END'
bin_PROGRAMS = foo
foo_SOURCES = parse.y foo.c
END

# Original parser, with `foobar'
cat > parse.y << 'END'
%{
int yylex () {return 0;}
void yyerror (char *s) {}
%}
%%
foobar : 'f' 'o' 'o' 'b' 'a' 'r' {};
END

cat > foo.c << 'END'
int main () { return 0; }
END

# We are not checking Autoconf, so we pick $YACC for it.
YACC="bison -y"
export YACC

set -e

$ACLOCAL
$AUTOCONF
$AUTOMAKE -a

$YACC parse.y
mv y.tab.c parse.c

mkdir sub
cd sub
../configure

# A delay is needed to make sure that the new parse.y is indeed newer
# than parse.c, i.e. the they don't have the same timestamp.
sleep 2

# New parser, with `fubar'
cat > ../parse.y << 'END'
%{
int yylex () {return 0;}
void yyerror (char *s) {}
%}
%%
fubar : 'f' 'o' 'o' 'b' 'a' 'r' {};
END

$MAKE
$MAKE distdir
grep fubar foo-0.1/parse.c

#
# Now check to make sure that `make dist' will rebuild the parser.
#

# A delay is needed to make sure that the new parse.y is indeed newer
# than parse.c, i.e. the they don't have the same timestamp.
sleep 2

# New parser, with `maude'
cat > ../parse.y << 'END'
%{
int yylex () {return 0;}
void yyerror (char *s) {}
%}
%%
maude : 'm' 'a' 'u' 'd' 'e' {};
END

$MAKE distdir
grep maude foo-0.1/parse.c