#                                                                    -*-perl-*-

$description = "Test --output-sync (-O) option.";

$details = "Test the synchronization of output from parallel jobs.";

if (!$parallel_jobs) {
  return -1;
}

if ($vos) {
  $sleep_command = "sleep -seconds";
}
else {
  $sleep_command = "sleep";
}

# The following subdirectories with Makefiles are used in several
# of the following tests.  The model is:
#   foo/Makefile - has a "foo" target that waits for the bar target
#   bar/Makefile - has a "bar" target that runs immediately
#                - has a "baz" target that waits for the foo target
#
# So, you start the two sub-makes in parallel and first the "bar" target is
# built, followed by "foo", followed by "baz".  The trick is that first each
# target prints a "start" statement, then waits (if appropriate), then prints
# an end statement.  Thus we can tell if the -O flag is working, since
# otherwise these statements would be mixed together.

@syncfiles = ();

sub output_sync_clean {
    rmfiles('foo/Makefile', 'bar/Makefile', @syncfiles);
    rmdir('foo');
    rmdir('bar');
}

# We synchronize the different jobs by having them wait for a sentinel file to
# be created, instead of relying on a certain amount of time passing.
# Unfortunately in this test we have to sleep after we see the sync file,
# since we also want to make the obtaining of the write synchronization lock
# reliable.  If things are too fast, then sometimes a different job will steal
# the output sync lock and the output is mis-ordered from what we expect.
sub output_sync_wait {
    return "while [ ! -f ../mksync.$_[0] ]; do :; done; rm -f ../mksync.$_[0].wait; $sleep_command 1";
}
sub output_sync_set {
    return "date > ../mksync.$_[0]";
}

@syncfiles = qw(mksync.foo mksync.foo_start mksync.bar mksync.bar_start);

output_sync_clean();
mkdir('foo', 0777);
mkdir('bar', 0777);

$set_foo = output_sync_set('foo');
$set_bar = output_sync_set('bar');
$set_foo_start = output_sync_set('foo_start');
$set_bar_start = output_sync_set('bar_start');

$wait_foo = output_sync_wait('foo');
$wait_bar = output_sync_wait('bar');
$wait_foo_start = output_sync_set('foo_start');
$wait_bar_start = output_sync_set('bar_start');

open(MAKEFILE,"> foo/Makefile");
print MAKEFILE <<EOF;
all: foo

foo: foo-base ; \@$set_foo

foo-base:
\t\@echo foo: start
\t\@$wait_bar
\t\@echo foo: end

foo-job: foo-job-base ; \@$set_foo

foo-job-base:
\t\@$wait_bar_start
\t\@echo foo: start
\t\@$set_foo_start
\t\@$wait_bar
\t\@echo foo: end

foo-fail:
\t\@echo foo-fail: start
\t\@$wait_bar
\t\@echo foo-fail: end
\t\@false
EOF
close(MAKEFILE);

open(MAKEFILE,"> bar/Makefile");
print MAKEFILE <<EOF;
all: bar baz

bar: bar-base ; \@$set_bar
bar-base:
\t\@echo bar: start
\t\@echo bar: end

bar-job: bar-job-base ; \@$set_bar

bar-job-base:
\t\@echo bar: start
\t\@$set_bar_start
\t\@$wait_foo_start
\t\@echo bar: end

baz: baz-base
baz-base:
\t\@echo baz: start
\t\@$wait_foo
\t\@echo baz: end
EOF
close(MAKEFILE);

# Test per-make synchronization.
unlink(@syncfiles);
run_make_test(qq!
all: make-foo make-bar

make-foo: ; \$(MAKE) -C foo

make-bar: ; \$(MAKE) -C bar!,
              '-j -Orecurse',
"#MAKEPATH# -C foo
#MAKE#[1]: Entering directory '#PWD#/foo'
foo: start
foo: end
#MAKE#[1]: Leaving directory '#PWD#/foo'
#MAKEPATH# -C bar
#MAKE#[1]: Entering directory '#PWD#/bar'
bar: start
bar: end
baz: start
baz: end
#MAKE#[1]: Leaving directory '#PWD#/bar'\n", 0, 6);

# Test per-target synchronization.
# Note we have to sleep again here after starting the foo makefile before
# starting the bar makefile, otherwise the "entering/leaving" messages for the
# submakes might be ordered differently than we expect.

unlink(@syncfiles);
run_make_test(qq!
all: make-foo make-bar

make-foo: ; \$(MAKE) -C foo

make-bar: ; $sleep_command 1 ; \$(MAKE) -C bar!,
              '-j --output-sync=target',
"#MAKEPATH# -C foo
$sleep_command 1 ; #MAKEPATH# -C bar
#MAKE#[1]: Entering directory '#PWD#/bar'
bar: start
bar: end
#MAKE#[1]: Entering directory '#PWD#/foo'
foo: start
foo: end
#MAKE#[1]: Leaving directory '#PWD#/foo'
baz: start
baz: end
#MAKE#[1]: Leaving directory '#PWD#/bar'\n", 0, 6);

# Test that messages from make itself are enclosed with
# "Entering/Leaving directory" messages.
unlink(@syncfiles);
run_make_test(qq!
all: make-foo-fail make-bar-bar

make-foo-fail: ; \$(MAKE) -C foo foo-fail

make-bar-bar: ; $sleep_command 1 ; \$(MAKE) -C bar bar!,
              '-j -O',
"#MAKEPATH# -C foo foo-fail
$sleep_command 1 ; #MAKEPATH# -C bar bar
#MAKE#[1]: Entering directory '#PWD#/bar'
bar: start
bar: end
#MAKE#[1]: Leaving directory '#PWD#/bar'
#MAKE#[1]: Entering directory '#PWD#/foo'
foo-fail: start
foo-fail: end
Makefile:20: recipe for target 'foo-fail' failed
#MAKE#[1]: *** [foo-fail] Error 1
#MAKE#[1]: Leaving directory '#PWD#/foo'
#MAKEFILE#:4: recipe for target 'make-foo-fail' failed
#MAKE#: *** [make-foo-fail] Error 2\n",
512);

# Test the per-job synchronization.
# For this we'll have bar-job:
#   print start, invoke bar-start, wait for foo-start, print end, print-bar-end
# And foo-job:
#   wait for bar-start, print foo-start, wait for bar-end, print end

unlink(@syncfiles);
run_make_test(qq!
all: make-foo make-bar

make-foo: ; \$(MAKE) -C foo foo-job

make-bar: ; $sleep_command 1 ; \$(MAKE) -C bar bar-job!,
              '-j --output-sync=line',
"#MAKEPATH# -C foo foo-job
$sleep_command 1 ; #MAKEPATH# -C bar bar-job
#MAKE#[1]: Entering directory '#PWD#/foo'
foo: start
#MAKE#[1]: Entering directory '#PWD#/bar'
bar: start
bar: end
#MAKE#[1]: Leaving directory '#PWD#/bar'
foo: end
#MAKE#[1]: Leaving directory '#PWD#/foo'\n", 0, 6);


# Remove temporary directories and contents.
output_sync_clean();

# Ensure recursion doesn't mis-order or double-print output
run_make_test(qq!
all:
\t\@echo foo
\t\@+echo bar
!,
              '-j -Oline', "foo\nbar\n");

run_make_test(undef, '-j -Otarget', "foo\nbar\n");

# Ensure when make writes out command it's not misordered
run_make_test(qq!
all:
\t\@echo foobar
\ttrue
!,
              '-j -Oline', "foobar\ntrue\n");

run_make_test(undef, '-j -Otarget', "foobar\ntrue\n");

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