# we can run tests in parallel with GNU make

all::

ruby = ruby
rainbows_lib := $(shell cd ../lib && pwd)
-include ../local.mk
ifeq ($(RUBY_VERSION),)
  RUBY_VERSION := $(shell $(ruby) -e 'puts RUBY_VERSION')
endif

ifeq ($(RUBYLIB),)
  RUBYLIB := $(rainbows_lib)
else
  RUBYLIB := $(rainbows_lib):$(RUBYLIB)
endif
export RUBYLIB RUBY_VERSION

T = $(wildcard t[0-9][0-9][0-9][0-9]-*.sh)

all:: $(T)

# can't rely on "set -o pipefail" since we don't require bash or ksh93 :<
t_pfx = trash/$@-$(RUBY_VERSION)
t_code = $(t_pfx).code
t_log = $(t_pfx).log
# TRACER = strace -f -o $(t_pfx).strace -s 100000
# TRACER = /usr/bin/time -o $(t_pfx).time
t_run = $(TRACER) $(SHELL) $(SH_TEST_OPTS) $@

# prefix stdout messages with ':', and stderr messages with '!'
t_wrap = ( ( ( echo 42 > $(t_code); \
  $(t_run); \
  echo $$? > $(t_code) ) \
  | sed 's/^/$(pfx):/' 1>&3 ) 2>&1 \
  | sed 's/^/$(pfx)!/' 1>&2 ) 3>&1

ifndef V
  quiet_pre = @echo '* $@';
  quiet_post = > $(t_log) 2>&1; exit $$(cat $(t_code))
  pfx =
else
  ifeq ($(V),2)
    SH_TEST_OPTS += -x
  endif
  quiet_pre = @echo '* $@';
  quiet_post = 2>&1 | ./bin/utee $(t_log); exit $$(cat $(t_code))
  pfx = $@
endif

run_test = $(quiet_pre) ( $(t_wrap) ) $(quiet_post)

test-bin-$(RUBY_VERSION)/rainbows: ruby_bin = $(shell which $(ruby))
test-bin-$(RUBY_VERSION)/rainbows: ../bin/rainbows
	mkdir -p $(@D)
	install -m 755 $^ $@+
	$(ruby) -i -p -e '$$_.gsub!(%r{^#!.*$$},"#!$(ruby_bin)")' $@+
	cmp $@+ $@ 2>/dev/null || mv $@+ $@
	$(RM) $@+

req_random_blob := $(wildcard t?1??-*.sh)
random_blob:
	dd if=/dev/urandom bs=1M count=10 of=$@+
	mv $@+ $@

$(req_random_blob): random_blob

$(T): trash/.gitignore
$(T): export ruby := $(ruby)
$(T): export PATH := $(CURDIR)/test-bin-$(RUBY_VERSION):$(PATH)
$(T): test-bin-$(RUBY_VERSION)/rainbows
	$(run_test)

trash/.gitignore:
	mkdir -p $(@D)
	echo '*' > $@

clean:
	$(RM) -r trash/*.log trash/*.code test-bin-$(RUBY_VERSION)

.PHONY: $(T) clean