export

make debug tool. You can use this tool to debug Makefile

#                                                                    -*-perl-*-
# $Id: export,v 1.4 2005/12/04 19:40:34 rockyb Exp $
$description = "Check GNU make export/unexport commands.";

$details = "
TEST  1: basic functioning
TEST  2: make sure variables inherited from the parent are exported
TEST  3: global export.  Explicit unexport takes precedence.
TEST  4: global unexport.  Explicit export takes precedence.
TEST  5: both: in the above makefile the unexport comes last so that rules.
TEST  6: pseudo target.
TEST  7: expansion of variables inside export
TEST  8: expansion of variables inside unexport
TEST  9: exporting multiple variables on the same line
TEST 10: unexporting multiple variables on the same line

Cygwin (at least seems) to have trouble *removing* environment
variables, so tests 4 and 5 are skipped on that platform.
";

# The test driver cleans out our environment for us so we don't have to worry
# about that here.

open(MAKEFILE,"> $makefile");

# The Contents of the MAKEFILE ...

print MAKEFILE <<'EOMAKE';

FOO = foo
BAR = bar
BOZ = boz

export BAZ = baz
export BOZ

BITZ = bitz
BOTZ = botz

export BITZ BOTZ
unexport BOTZ

ifdef EXPORT_ALL
export
endif

ifdef UNEXPORT_ALL
unexport
endif

ifdef EXPORT_ALL_PSEUDO
.EXPORT_ALL_VARIABLES:
endif

all:
	@echo "FOO=$(FOO) BAR=$(BAR) BAZ=$(BAZ) BOZ=$(BOZ) BITZ=$(BITZ) BOTZ=$(BOTZ)"
	@echo "FOO=$$FOO BAR=$$BAR BAZ=$$BAZ BOZ=$$BOZ BITZ=$$BITZ BOTZ=$$BOTZ"

EOMAKE

close(MAKEFILE);

sub run_test_compare($@) {
    my $answer = shift @_;
    map { $ENV{$_}=1; } @_;
    run_make_with_options($makefile,"",&get_logfile,0);
    &compare_output($answer,&get_logfile(1));
    map { delete $ENV{$_}; } @_;
}

# TEST  1: basic functioning

$answer = "FOO=foo BAR=bar BAZ=baz BOZ=boz BITZ=bitz BOTZ=botz
FOO= BAR= BAZ=baz BOZ=boz BITZ=bitz BOTZ=\n";
run_test_compare($answer, ());

# TEST  2: make sure variables inherited from the parent are exported

$answer = "FOO=foo BAR=bar BAZ=baz BOZ=boz BITZ=bitz BOTZ=botz
FOO=foo BAR= BAZ=baz BOZ=boz BITZ=bitz BOTZ=\n";

run_test_compare($answer, ('FOO'));

# TEST  3: global export.  Explicit unexport takes precedence.

$answer = "FOO=foo BAR=bar BAZ=baz BOZ=boz BITZ=bitz BOTZ=botz
FOO=foo BAR=bar BAZ=baz BOZ=boz BITZ=bitz BOTZ=\n";

run_test_compare($answer, ('EXPORT_ALL'));

# Cygwin (at least seems) to have trouble *removing* environment
# variables.
if ($osname !~ /^CYGWIN/) {
    # TEST  4: global unexport.  Explicit export takes precedence.

    $answer = "FOO=foo BAR=bar BAZ=baz BOZ=boz BITZ=bitz BOTZ=botz
FOO= BAR= BAZ=baz BOZ=boz BITZ=bitz BOTZ=\n";
    run_test_compare($answer, ('UNEXPORT_ALL'));

    # TEST 5: both: in the above makefile the unexport comes last so
    # that rules.

    $answer = "FOO=foo BAR=bar BAZ=baz BOZ=boz BITZ=bitz BOTZ=botz
FOO= BAR= BAZ=baz BOZ=boz BITZ=bitz BOTZ=\n";
    run_test_compare($answer, ('EXPORT_ALL', 'UNEXPORT_ALL'));
}

# TEST  6: pseudo target.

&run_make_with_options($makefile,"EXPORT_ALL_PSEUDO=1",&get_logfile,0);

$answer = "FOO=foo BAR=bar BAZ=baz BOZ=boz BITZ=bitz BOTZ=botz
FOO=foo BAR=bar BAZ=baz BOZ=boz BITZ=bitz BOTZ=\n";
run_test_compare($answer, ('EXPORT_ALL_PSEUDO'));

# TEST  7: expansion of variables inside export

$makefile2 = &get_tmpfile;

open(MAKEFILE, "> $makefile2");

print MAKEFILE <<'EOF';

foo = f-ok
bar = b-ok

FOO = foo
F = f

BAR = bar
B = b

export $(FOO)
export $(B)ar

all:
	@echo foo=$(foo) bar=$(bar)
	@echo foo=$$foo bar=$$bar

EOF

close(MAKEFILE);

&run_make_with_options($makefile2,"",&get_logfile,0);
$answer = "foo=f-ok bar=b-ok\nfoo=f-ok bar=b-ok\n";
&compare_output($answer,&get_logfile(1));


# TEST  8: expansion of variables inside unexport

$makefile3 = &get_tmpfile;

open(MAKEFILE, "> $makefile3");

print MAKEFILE <<'EOF';

foo = f-ok
bar = b-ok

FOO = foo
F = f

BAR = bar
B = b

export foo bar

unexport $(FOO)
unexport $(B)ar

all:
	@echo foo=$(foo) bar=$(bar)
	@echo foo=$$foo bar=$$bar

EOF

close(MAKEFILE);

&run_make_with_options($makefile3,"",&get_logfile,0);
$answer = "foo=f-ok bar=b-ok\nfoo= bar=\n";
&compare_output($answer,&get_logfile(1));


# TEST  9: exporting multiple variables on the same line

$makefile4 = &get_tmpfile;

open(MAKEFILE, "> $makefile4");

print MAKEFILE <<'EOF';

A = a
B = b
C = c
D = d
E = e
F = f
G = g
H = h
I = i
J = j

SOME = A B C

export F G H I J

export D E $(SOME)

all: ; @echo A=$$A B=$$B C=$$C D=$$D E=$$E F=$$F G=$$G H=$$H I=$$I J=$$J
EOF

close(MAKEFILE);

&run_make_with_options($makefile4,"",&get_logfile,0);
$answer = "A=a B=b C=c D=d E=e F=f G=g H=h I=i J=j\n";
&compare_output($answer,&get_logfile(1));


# TEST 10: unexporting multiple variables on the same line

$makefile5 = &get_tmpfile;

open(MAKEFILE, "> $makefile5");

print MAKEFILE <<'EOF';

A = a
B = b
C = c
D = d
E = e
F = f
G = g
H = h
I = i
J = j

SOME = A B C

unexport F G H I J

unexport D E $(SOME)

all: ; @echo A=$$A B=$$B C=$$C D=$$D E=$$E F=$$F G=$$G H=$$H I=$$I J=$$J
EOF

close(MAKEFILE);

@ENV{qw(A B C D E F G H I J)} = qw(1 2 3 4 5 6 7 8 9 10);

&run_make_with_options($makefile5,"",&get_logfile,0);
$answer = "A= B= C= D= E= F= G= H= I= J=\n";
&compare_output($answer,&get_logfile(1));

delete @ENV{qw(A B C D E F G H I J)};


# This tells the test driver that the perl test script executed properly.
1;