# Usage/help
all help:
	@echo
	@echo 'USAGE:'
	@echo
	@echo 'Rules/Targets:'
	@echo
	@echo 'make "IMPL"                       # build all steps of IMPL'
	@echo 'make "IMPL^STEP"                  # build STEP of IMPL'
	@echo
	@echo 'make "test"                       # test all implementations'
	@echo 'make "test^IMPL"                  # test all steps of IMPL'
	@echo 'make "test^STEP"                  # test STEP for all implementations'
	@echo 'make "test^IMPL^STEP"             # test STEP of IMPL'
	@echo
	@echo 'make "perf"                       # run microbenchmarks for all implementations'
	@echo 'make "perf^IMPL"                  # run microbenchmarks for IMPL'
	@echo
	@echo 'make "repl^IMPL"                  # run stepA of IMPL'
	@echo 'make "repl^IMPL^STEP"             # test STEP of IMPL'
	@echo
	@echo 'make "clean"                      # run 'make clean' for all implementations'
	@echo 'make "clean^IMPL"                 # run 'make clean' for IMPL'
	@echo
	@echo 'make "stats"                      # run 'make stats' for all implementations'
	@echo 'make "stats-lisp"                 # run 'make stats-lisp' for all implementations'
	@echo 'make "stats^IMPL"                 # run 'make stats' for IMPL'
	@echo 'make "stats-lisp^IMPL"            # run 'make stats-lisp' for IMPL'
	@echo
	@echo 'Options/Settings:'
	@echo
	@echo 'make MAL_IMPL=IMPL "test^mal..."  # use IMPL for self-host tests'
	@echo 'make REGRESS=1 "test..."          # test with previous step tests too'
	@echo 'make DOCKERIZE=1 ...              # to dockerize above rules/targets'
	@echo
	@echo 'Other:'
	@echo
	@echo 'make "docker-build^IMPL"          # build docker image for IMPL'
	@echo

#
# Command line settings
#

MAL_IMPL = js

PYTHON = python
USE_MATLAB =
# python, js, cpp, or neko are currently supported
HAXE_MODE = neko

# Extra options to pass to runtest.py
TEST_OPTS =

# Test with previous test files not just the test files for the
# current step. Step 0 and 1 tests are special and not included in
# later steps.
REGRESS =

# Extra implementation specific options to pass to runtest.py
mal_TEST_OPTS = --start-timeout 60 --test-timeout 120
miniMAL_TEST_OPTS = --start-timeout 60 --test-timeout 120

DOCKERIZE=

# Run target/rule within docker image for the implementation
DOCKERIZE =

#
# Settings
#

IMPLS = ada awk bash c d chuck clojure coffee cpp crystal cs erlang elisp \
	elixir es6 factor forth fsharp go groovy guile haskell haxe \
	io java julia js kotlin lua make mal ocaml matlab miniMAL \
	nim objc objpascal perl php ps python r racket rpython ruby \
	rust scala swift swift3 tcl vb vimscript

step0 = step0_repl
step1 = step1_read_print
step2 = step2_eval
step3 = step3_env
step4 = step4_if_fn_do
step5 = step5_tco
step6 = step6_file
step7 = step7_quote
step8 = step8_macros
step9 = step9_try
stepA = stepA_mal

regress_step0 = step0
regress_step1 = step1
regress_step2 = step2
regress_step3 = $(regress_step2) step3
regress_step4 = $(regress_step3) step4
regress_step5 = $(regress_step4) step5
regress_step6 = $(regress_step5) step6
regress_step7 = $(regress_step6) step7
regress_step8 = $(regress_step7) step8
regress_step9 = $(regress_step8) step9
regress_stepA = $(regress_step9) stepA

test_EXCLUDES += test^bash^step5   # never completes at 10,000
test_EXCLUDES += test^make^step5   # no TCO capability (iteration or recursion)
test_EXCLUDES += test^mal^step5    # host impl dependent
test_EXCLUDES += test^matlab^step5 # never completes at 10,000

perf_EXCLUDES = mal  # TODO: fix this

dist_EXCLUDES += mal
# TODO: still need to implement dist
dist_EXCLUDES += guile io julia matlab swift

#
# Utility functions
#

MATLAB = matlab -nodisplay -nosplash -nodesktop -nojvm -r
OCTAVE = octave --no-gui -q --traditional --eval
matlab_args = $(subst $(SPACE),$(COMMA),$(foreach x,$(strip $(1)),'$(x)'))
matlab_cmd = $(if $(strip $(USE_MATLAB)),$(MATLAB),$(OCTAVE))

haxe_STEP_TO_PROG_neko   = haxe/$($(1)).n
haxe_STEP_TO_PROG_python = haxe/$($(1)).py
haxe_STEP_TO_PROG_cpp    = haxe/cpp/$($(1))
haxe_STEP_TO_PROG_js     = haxe/$($(1)).js

haxe_RUNSTEP_neko   = neko ../$(2) $(3)
haxe_RUNSTEP_python = python3 ../$(2) $(3)
haxe_RUNSTEP_cpp    = ../$(2) $(3)
haxe_RUNSTEP_js     = node ../$(2) $(3)

# Return list of test files for a given step. If REGRESS is set then
# test files will include step 2 tests through tests for the step
# being tested.
STEP_TEST_FILES = $(strip $(wildcard \
		    $(foreach s,$(if $(strip $(REGRESS)),$(regress_$(2)),$(2)),\
		      $(1)/tests/$($(s)).mal tests/$($(s)).mal)))

# Map of step (e.g. "step8") to executable file for that step
ada_STEP_TO_PROG =     ada/$($(1))
awk_STEP_TO_PROG =     awk/$($(1)).awk
bash_STEP_TO_PROG =    bash/$($(1)).sh
c_STEP_TO_PROG =       c/$($(1))
d_STEP_TO_PROG =       d/$($(1))
chuck_STEP_TO_PROG =   chuck/$($(1)).ck
clojure_STEP_TO_PROG = clojure/src/$($(1)).clj
coffee_STEP_TO_PROG =  coffee/$($(1)).coffee
cpp_STEP_TO_PROG =     cpp/$($(1))
crystal_STEP_TO_PROG = crystal/$($(1))
cs_STEP_TO_PROG =      cs/$($(1)).exe
elisp_STEP_TO_PROG =   elisp/$($(1)).el
elixir_STEP_TO_PROG =  elixir/lib/mix/tasks/$($(1)).ex
erlang_STEP_TO_PROG =  erlang/$($(1))
es6_STEP_TO_PROG =     es6/build/$($(1)).js
factor_STEP_TO_PROG =  factor/$($(1))/$($(1)).factor
forth_STEP_TO_PROG =   forth/$($(1)).fs
fsharp_STEP_TO_PROG =  fsharp/$($(1)).exe
go_STEP_TO_PROG =      go/$($(1))
groovy_STEP_TO_PROG =  groovy/$($(1)).groovy
java_STEP_TO_PROG =    java/target/classes/mal/$($(1)).class
haskell_STEP_TO_PROG = haskell/$($(1))
haxe_STEP_TO_PROG =    $(haxe_STEP_TO_PROG_$(HAXE_MODE))
io_STEP_TO_PROG =      io/$($(1)).io
julia_STEP_TO_PROG =   julia/$($(1)).jl
js_STEP_TO_PROG =      js/$($(1)).js
kotlin_STEP_TO_PROG =  kotlin/$($(1)).jar
lua_STEP_TO_PROG =     lua/$($(1)).lua
make_STEP_TO_PROG =    make/$($(1)).mk
mal_STEP_TO_PROG =     mal/$($(1)).mal
ocaml_STEP_TO_PROG =   ocaml/$($(1))
matlab_STEP_TO_PROG =  matlab/$($(1)).m
miniMAL_STEP_TO_PROG = miniMAL/$($(1)).json
nim_STEP_TO_PROG =     nim/$($(1))
objc_STEP_TO_PROG =    objc/$($(1))
objpascal_STEP_TO_PROG = objpascal/$($(1))
perl_STEP_TO_PROG =    perl/$($(1)).pl
php_STEP_TO_PROG =     php/$($(1)).php
ps_STEP_TO_PROG =      ps/$($(1)).ps
python_STEP_TO_PROG =  python/$($(1)).py
r_STEP_TO_PROG =       r/$($(1)).r
racket_STEP_TO_PROG =  racket/$($(1)).rkt
rpython_STEP_TO_PROG = rpython/$($(1))
ruby_STEP_TO_PROG =    ruby/$($(1)).rb
rust_STEP_TO_PROG =    rust/target/release/$($(1))
scala_STEP_TO_PROG =   scala/$($(1)).scala
swift_STEP_TO_PROG =   swift/$($(1))
swift3_STEP_TO_PROG =  swift3/$($(1))
tcl_STEP_TO_PROG =     tcl/$($(1)).tcl
vb_STEP_TO_PROG =      vb/$($(1)).exe
vimscript_STEP_TO_PROG = vimscript/$($(1)).vim
guile_STEP_TO_PROG =   guile/$($(1)).scm


# Needed some argument munging
COMMA = ,
noop =
SPACE = $(noop) $(noop)
export FACTOR_ROOTS := .

# Macro for running a step:
#   $(1): step (e.g. "stepA")
#   $(2): program for step (e.g. result of *_STEP_TO_PROG
#   $(3): program arguments
ada_RUNSTEP =     ../$(2) $(3)
awk_RUNSTEP =     awk -O -f ../$(2) $(3)
bash_RUNSTEP =    bash ../$(2) $(3)
c_RUNSTEP =       ../$(2) $(3)
d_RUNSTEP =       ../$(2) $(3)
chuck_RUNSTEP =   chuck --silent ../$(2) $(3)
clojure_RUNSTEP = lein with-profile +$(1) trampoline run $(3)
coffee_RUNSTEP =  coffee ../$(2) $(3)
cpp_RUNSTEP =     ../$(2) $(3)
crystal_RUNSTEP = ../$(2) $(3)
cs_RUNSTEP =      mono ../$(2) --raw $(3)
elisp_RUNSTEP =   emacs -Q --batch --load ../$(2) $(3)
elixir_RUNSTEP =  mix $(notdir $(basename $(2))) $(3)
erlang_RUNSTEP =  ../$(2) $(3)
es6_RUNSTEP =     node ../$(2) $(3)
factor_RUNSTEP =  factor ../$(2) $(3)
forth_RUNSTEP =   gforth ../$(2) $(3)
fsharp_RUNSTEP =  mono ../$(2) --raw $(3)
go_RUNSTEP =      ../$(2) $(3)
groovy_RUNSTEP =  groovy ../$(2) $(3)
# needs TERM=dumb to work with readline
guile_RUNSTEP =   guile --no-auto-compile -L ../guile ../$(2) $(3)
haskell_RUNSTEP = ../$(2) $(3)
haxe_RUNSTEP =    python3 ../$(2) $(3)
haxe_RUNSTEP =    $(haxe_RUNSTEP_$(HAXE_MODE))
io_RUNSTEP =      io ../$(2) $(3)
java_RUNSTEP =    mvn -quiet exec:java -Dexec.mainClass="mal.$($(1))" $(if $(3), -Dexec.args="$(3)",)
julia_RUNSTEP =   ../$(2) $(3)
js_RUNSTEP =      node ../$(2) $(3)
kotlin_RUNSTEP =  java -jar ../$(2) $(3)
lua_RUNSTEP =     ../$(2) $(3)
make_RUNSTEP =    make -f ../$(2) $(3)
mal_RUNSTEP =     $(call $(MAL_IMPL)_RUNSTEP,stepA,$(call $(MAL_IMPL)_STEP_TO_PROG,stepA),../$(2),")  #"
ocaml_RUNSTEP =   ../$(2) $(3)
matlab_RUNSTEP =  $(matlab_cmd) "$($(1))($(call matlab_args,$(3)));quit;"
miniMAL_RUNSTEP = miniMAL ../$(2) $(3)
nim_RUNSTEP =     ../$(2) $(3)
objc_RUNSTEP =    ../$(2) $(3)
objpascal_RUNSTEP = ../$(2) $(3)
perl_RUNSTEP =    perl ../$(2) $(3)
php_RUNSTEP =     php ../$(2) $(3)
ps_RUNSTEP =      gs -q -I./ -dNODISPLAY -- ../$(2) $(3)
python_RUNSTEP =  $(PYTHON) ../$(2) $(3)
r_RUNSTEP =       Rscript ../$(2) $(3)
racket_RUNSTEP =  ../$(2) $(3)
rpython_RUNSTEP = ../$(2) $(3)
ruby_RUNSTEP =    ruby ../$(2) $(3)
rust_RUNSTEP =    ../$(2) $(3)
scala_RUNSTEP =   sbt 'run-main $($(1))$(if $(3), $(3),)'
swift_RUNSTEP =   ../$(2) $(3)
swift3_RUNSTEP =  ../$(2) $(3)
tcl_RUNSTEP =     tclsh ../$(2) --raw $(3)
vb_RUNSTEP =      mono ../$(2) --raw $(3)
vimscript_RUNSTEP = ./run_vimscript.sh ../$(2) $(3)


# DOCKERIZE utility functions
lc = $(subst A,a,$(subst B,b,$(subst C,c,$(subst D,d,$(subst E,e,$(subst F,f,$(subst G,g,$(subst H,h,$(subst I,i,$(subst J,j,$(subst K,k,$(subst L,l,$(subst M,m,$(subst N,n,$(subst O,o,$(subst P,p,$(subst Q,q,$(subst R,r,$(subst S,s,$(subst T,t,$(subst U,u,$(subst V,v,$(subst W,w,$(subst X,x,$(subst Y,y,$(subst Z,z,$1))))))))))))))))))))))))))
impl_to_image = kanaka/mal-test-$(call lc,$(1))

actual_impl = $(if $(filter mal,$(1)),$(MAL_IMPL),$(1))

get_build_prefix = $(if $(strip $(DOCKERIZE)),docker run -it --rm -u $(shell id -u) -v $(dir $(abspath $(lastword $(MAKEFILE_LIST)))):/mal -w /mal/$(1) $(if $(filter factor,$(1)),-e FACTOR_ROOTS=$(FACTOR_ROOTS),) $(call impl_to_image,$(1)) ,)
get_run_prefix = $(if $(strip $(DOCKERIZE)),docker run -it --rm -u $(shell id -u) -v $(dir $(abspath $(lastword $(MAKEFILE_LIST)))):/mal -w /mal/$(call actual_impl,$(1)) $(if $(filter factor,$(1)),-e FACTOR_ROOTS=$(FACTOR_ROOTS),) $(call impl_to_image,$(call actual_impl,$(1))) ,)


vimscript_TEST_OPTS = --test-timeout 30
ifeq ($(MAL_IMPL),vimscript)
mal_TEST_OPTS = --start-timeout 60 --test-timeout 180
endif

# Derived lists
STEPS = $(sort $(filter step%,$(.VARIABLES)))
DO_IMPLS = $(filter-out $(SKIP_IMPLS),$(IMPLS))
IMPL_TESTS = $(foreach impl,$(DO_IMPLS),test^$(impl))
STEP_TESTS = $(foreach step,$(STEPS),test^$(step))
ALL_TESTS = $(filter-out $(test_EXCLUDES),\
              $(strip $(sort \
                $(foreach impl,$(DO_IMPLS),\
                  $(foreach step,$(STEPS),test^$(impl)^$(step))))))

DOCKER_BUILD = $(foreach impl,$(DO_IMPLS),docker-build^$(impl))

IMPL_PERF = $(foreach impl,$(filter-out $(perf_EXCLUDES),$(DO_IMPLS)),perf^$(impl))

IMPL_REPL = $(foreach impl,$(DO_IMPLS),repl^$(impl))
ALL_REPL = $(strip $(sort \
             $(foreach impl,$(DO_IMPLS),\
               $(foreach step,$(STEPS),repl^$(impl)^$(step)))))

#
# Build rules
#

# Build a program in an implementation directory
# Make sure we always try and build first because the dependencies are
# encoded in the implementation Makefile not here
.PHONY: $(foreach i,$(DO_IMPLS),$(foreach s,$(STEPS),$(call $(i)_STEP_TO_PROG,$(s))))
$(foreach i,$(DO_IMPLS),$(foreach s,$(STEPS),$(call $(i)_STEP_TO_PROG,$(s)))):
	$(foreach impl,$(word 1,$(subst /, ,$(@))),\
	  $(if $(DOCKERIZE), \
	    $(call get_build_prefix,$(impl))$(MAKE) $(patsubst $(impl)/%,%,$(@)), \
	    $(MAKE) -C $(impl) $(subst $(impl)/,,$(@))))

# Allow IMPL, and IMPL^STEP
.SECONDEXPANSION:
$(DO_IMPLS): $$(foreach s,$$(STEPS),$$(call $$(@)_STEP_TO_PROG,$$(s)))

.SECONDEXPANSION:
$(foreach i,$(DO_IMPLS),$(foreach s,$(STEPS),$(i)^$(s))): $$(call $$(word 1,$$(subst ^, ,$$(@)))_STEP_TO_PROG,$$(word 2,$$(subst ^, ,$$(@))))


#
# Test rules
#

.SECONDEXPANSION:
$(ALL_TESTS): $$(call $$(word 2,$$(subst ^, ,$$(@)))_STEP_TO_PROG,$$(word 3,$$(subst ^, ,$$(@))))
	@$(foreach impl,$(word 2,$(subst ^, ,$(@))),\
	  $(foreach step,$(word 3,$(subst ^, ,$(@))),\
	    cd $(if $(filter mal,$(impl)),$(MAL_IMPL),$(impl)) && \
	    $(foreach test,$(call STEP_TEST_FILES,$(impl),$(step)),\
	      echo '----------------------------------------------' && \
	      echo 'Testing $@, step file: $+, test file: $(test)' && \
	      echo 'Running: $(call get_run_prefix,$(impl))../runtest.py $(TEST_OPTS) $(call $(impl)_TEST_OPTS) ../$(test) -- $(call $(impl)_RUNSTEP,$(step),$(+))' && \
	      $(call get_run_prefix,$(impl))../runtest.py $(TEST_OPTS) $(call $(impl)_TEST_OPTS) ../$(test) -- $(call $(impl)_RUNSTEP,$(step),$(+)) &&) \
	    true))

# Allow test, tests, test^STEP, test^IMPL, and test^IMPL^STEP
test: $(ALL_TESTS)
tests: $(ALL_TESTS)

.SECONDEXPANSION:
$(IMPL_TESTS): $$(filter $$@^%,$$(ALL_TESTS))

.SECONDEXPANSION:
$(STEP_TESTS): $$(foreach step,$$(subst test^,,$$@),$$(filter %^$$(step),$$(ALL_TESTS)))


#
# Dist rules
#

dist: $(IMPL_DIST)

.SECONDEXPANSION:
$(IMPL_DIST):
	@echo "----------------------------------------------"; \
	$(foreach impl,$(word 2,$(subst ^, ,$(@))),\
	  echo "Running: make -C $(impl) dist"; \
	  $(MAKE) --no-print-directory -C $(impl) dist)


#
# Docker build rules
#

docker-build: $(DOCKER_BUILD)

.SECONDEXPANSION:
$(DOCKER_BUILD):
	echo "----------------------------------------------"; \
	$(foreach impl,$(word 2,$(subst ^, ,$(@))),\
	  echo "Running: docker build -t $(call impl_to_image,$(impl)) .:"; \
	  cd $(impl) && docker build -t $(call impl_to_image,$(impl)) .)


#
# Performance test rules
#

perf: $(IMPL_PERF)

.SECONDEXPANSION:
$(IMPL_PERF):
	@echo "----------------------------------------------"; \
	$(foreach impl,$(word 2,$(subst ^, ,$(@))),\
	  cd $(if $(filter mal,$(impl)),$(MAL_IMPL),$(impl)); \
	  echo "Performance test for $(impl):"; \
	  echo 'Running: $(call get_run_prefix,$(impl))$(call $(impl)_RUNSTEP,stepA,$(call $(impl)_STEP_TO_PROG,stepA),../tests/perf1.mal)'; \
          $(call get_run_prefix,$(impl))$(call $(impl)_RUNSTEP,stepA,$(call $(impl)_STEP_TO_PROG,stepA),../tests/perf1.mal); \
	  echo 'Running: $(call $(impl)_RUNSTEP,stepA,$(call $(impl)_STEP_TO_PROG,stepA),../tests/perf2.mal)'; \
          $(call get_run_prefix,$(impl))$(call $(impl)_RUNSTEP,stepA,$(call $(impl)_STEP_TO_PROG,stepA),../tests/perf2.mal); \
	  echo 'Running: $(call $(impl)_RUNSTEP,stepA,$(call $(impl)_STEP_TO_PROG,stepA),../tests/perf3.mal)'; \
          $(call get_run_prefix,$(impl))$(call $(impl)_RUNSTEP,stepA,$(call $(impl)_STEP_TO_PROG,stepA),../tests/perf3.mal))


#
# REPL invocation rules
#

.SECONDEXPANSION:
$(ALL_REPL): $$(call $$(word 2,$$(subst ^, ,$$(@)))_STEP_TO_PROG,$$(word 3,$$(subst ^, ,$$(@))))
	@$(foreach impl,$(word 2,$(subst ^, ,$(@))),\
	  $(foreach step,$(word 3,$(subst ^, ,$(@))),\
	    cd $(if $(filter mal,$(impl)),$(MAL_IMPL),$(impl)); \
	    echo 'REPL implementation $(impl), step file: $+'; \
	    echo 'Running: $(call get_run_prefix,$(impl))$(call $(impl)_RUNSTEP,$(step),$(+))'; \
	    $(call get_run_prefix,$(impl))$(call $(impl)_RUNSTEP,$(step),$(+));))

# Allow repl^IMPL^STEP and repl^IMPL (which starts REPL of stepA)
.SECONDEXPANSION:
$(IMPL_REPL): $$@^stepA

#
# Utility functions
#
.SECONDEXPANSION:
print-%:
	@echo "$($(*))"

#
# Recursive rules (call make FOO in each subdirectory)
#

define recur_template
.PHONY: $(1)
$(1): $(2)
.SECONDEXPANSION:
$(2):
	@echo "----------------------------------------------"; \
	$$(foreach impl,$$(word 2,$$(subst ^, ,$$(@))),\
	  $$(if $$(DOCKERIZE), \
	    echo "Running: $$(call get_build_prefix,$$(impl))$$(MAKE) --no-print-directory $(1)"; \
	    $$(call get_build_prefix,$$(impl))$$(MAKE) --no-print-directory $(1), \
	    echo "Running: $$(MAKE) --no-print-directory -C $$(impl) $(1)"; \
	    $$(MAKE) --no-print-directory -C $$(impl) $(1)))
endef

recur_impls_ = $(filter-out $(foreach impl,$($(1)_EXCLUDES),$(1)^$(impl)),$(foreach impl,$(IMPLS),$(1)^$(impl)))

# recursive clean
$(eval $(call recur_template,clean,$(call recur_impls_,clean)))

# recursive stats
$(eval $(call recur_template,stats,$(call recur_impls_,stats)))
$(eval $(call recur_template,stats-lisp,$(call recur_impls_,stats-lisp)))

# recursive dist
$(eval $(call recur_template,dist,$(call recur_impls_,dist)))