# Copyright (c) 2018-2019 Status Research & Development GmbH. Licensed under
# either of:
# - Apache License, version 2.0
# - MIT license
# at your option. This file may not be copied, modified, or distributed except
# according to those terms.

# common parts
include common.mk

GIT_CLONE := git clone --quiet --recurse-submodules
GIT_PULL := git pull --recurse-submodules
GIT_STATUS := git status
#- the Nimble dir can't be "[...]/vendor", or Nimble will start looking for
#  version numbers in repo dirs (because those would be in its subdirectories)
#- duplicated in "env.sh" for the env var with the same name
NIMBLE_DIR := vendor/.nimble
REPOS_DIR := vendor
ifeq ($(OS), Windows_NT)
  PWD := pwd -W
else
  PWD := pwd
endif
# we want a "recursively expanded" (delayed interpolation) variable here, so we can set CMD in rule recipes
RUN_CMD_IN_ALL_REPOS = git submodule foreach --recursive --quiet 'echo -e "\n\e[32m$$name:\e[39m"; $(CMD)'; echo -e "\n\e[32m$$($(PWD)):\e[39m"; $(CMD)
# absolute path, since it will be run at various subdirectory depths
ENV_SCRIPT := "$(CURDIR)/env.sh"
# duplicated in "env.sh" to prepend NIM_DIR/bin to PATH
NIM_DIR := vendor/Nim

ifeq ($(OS), Windows_NT)
  EXE_SUFFIX := .exe
else
  EXE_SUFFIX :=
endif
NIM_BINARY := $(NIM_DIR)/bin/nim$(EXE_SUFFIX)
# md5sum - macOS is a special case
ifeq ($(shell uname), Darwin)
  MD5SUM := md5 -r
else
  MD5SUM := md5sum
endif
# AppVeyor/Travis cache of $(NIM_DIR)/bin
CI_CACHE :=

# debugging tools + testing tools
TOOLS := premix persist debug dumper hunter regress tracerTestGen persistBlockTestGen
TOOLS_DIRS := premix tests
# comma-separated values for the "clean" target
TOOLS_CSV := $(subst $(SPACE),$(COMMA),$(TOOLS))

.PHONY: all $(TOOLS) deps sanity-checks github-ssh build-nim update status ntags ctags nimbus testsuite test clean mrproper fetch-dlls test-libp2p-daemon nat-libs libminiupnpc.a libnatpmp.a go-checks libnimbus.so libnimbus.a wrappers

# default target, because it's the first one that doesn't start with '.'
all: $(TOOLS) nimbus

#- when the special ".SILENT" target is present, all recipes are silenced as if they all had a "@" prefix
#- by setting SILENT_TARGET_PREFIX to a non-empty value, the name of this target becomes meaningless to `make`
#- idea stolen from http://make.mad-scientist.net/managing-recipe-echoing/
$(SILENT_TARGET_PREFIX).SILENT:

# builds the tools, wherever they are
$(TOOLS): | build deps nat-libs
	for D in $(TOOLS_DIRS); do [ -e "$${D}/$@.nim" ] && TOOL_DIR="$${D}" && break; done && \
		echo -e $(BUILD_MSG) "build/$@" && \
		$(ENV_SCRIPT) nim c $(NIM_PARAMS) -o:build/$@ "$${TOOL_DIR}/$@.nim"

# a phony target, because teaching `make` how to do conditional recompilation of Nim projects is too complicated
nimbus: | build deps nat-libs
	echo -e $(BUILD_MSG) "build/$@" && \
		$(ENV_SCRIPT) nim nimbus $(NIM_PARAMS) nimbus.nims

# dir
build:
	mkdir $@

#- runs only the first time and after `make update`, so have "normal"
#  (timestamp-checked) prerequisites here
#- $(NIM_BINARY) is both a proxy for submodules having been initialised
#  and a check for the actual compiler build
deps: sanity-checks $(NIM_BINARY) $(NIMBLE_DIR) nimbus.nims

sanity-checks:
	which $(CC) &>/dev/null || { echo "C compiler ($(CC)) not installed. Aborting."; exit 1; }

nat-libs: | libminiupnpc.a libnatpmp.a

libminiupnpc.a: | deps
ifeq ($(OS), Windows_NT)
	+ [ -e vendor/nim-nat-traversal/vendor/miniupnp/miniupnpc/$@ ] || \
		$(MAKE) -C vendor/nim-nat-traversal/vendor/miniupnp/miniupnpc -f Makefile.mingw CC=gcc init $@ $(HANDLE_OUTPUT)
else
	+ $(MAKE) -C vendor/nim-nat-traversal/vendor/miniupnp/miniupnpc $@ $(HANDLE_OUTPUT)
endif

libnatpmp.a: | deps
ifeq ($(OS), Windows_NT)
	+ $(MAKE) -C vendor/nim-nat-traversal/vendor/libnatpmp CC=gcc CFLAGS="-Wall -Os -DWIN32 -DNATPMP_STATICLIB -DENABLE_STRNATPMPERR" $@ $(HANDLE_OUTPUT)
else
	+ $(MAKE) -C vendor/nim-nat-traversal/vendor/libnatpmp $@ $(HANDLE_OUTPUT)
endif

#- depends on Git submodules being initialised
#- fakes a Nimble package repository with the minimum info needed by the Nim compiler
#  for runtime path (i.e.: the second line in $(NIMBLE_DIR)/pkgs/*/*.nimble-link)
$(NIMBLE_DIR): | $(NIM_BINARY)
	mkdir -p $(NIMBLE_DIR)/pkgs
	NIMBLE_DIR="$(CURDIR)/$(NIMBLE_DIR)" PWD_CMD="$(PWD)" \
		git submodule foreach --quiet 'bash $(CURDIR)/scripts/create_nimble_link.sh "$$sm_path"'

# symlink
nimbus.nims:
	ln -s nimbus.nimble $@

# builds and runs the test suite
test: | build deps nat-libs
	$(ENV_SCRIPT) nim test $(NIM_PARAMS) nimbus.nims

# primitive reproducibility test
test-reproducibility:
	+ [ -e build/nimbus ] || $(MAKE) V=0 nimbus; \
		MD5SUM1=$$($(MD5SUM) build/nimbus | cut -d ' ' -f 1) && \
		rm -rf nimcache/*/nimbus && \
		$(MAKE) V=0 nimbus && \
		MD5SUM2=$$($(MD5SUM) build/nimbus | cut -d ' ' -f 1) && \
		[ "$$MD5SUM1" = "$$MD5SUM2" ] && echo -e "\e[92mSuccess: identical binaries.\e[39m" || \
			{ echo -e "\e[91mFailure: the binary changed between builds.\e[39m"; exit 1; }

# usual cleaning
clean:
	rm -rf build/{nimbus,$(TOOLS_CSV),all_tests,test_rpc,*.exe,*.so,*.so.0,*_wrapper_test} vendor/go/bin \
		$(NIMBLE_DIR) $(NIM_BINARY) $(NIM_DIR)/nimcache nimcache
	+ $(MAKE) -C vendor/nim-nat-traversal/vendor/miniupnp/miniupnpc clean $(HANDLE_OUTPUT)
	+ $(MAKE) -C vendor/nim-nat-traversal/vendor/libnatpmp clean $(HANDLE_OUTPUT)

# dangerous cleaning, because you may have not-yet-pushed branches and commits in those vendor repos you're about to delete
mrproper: clean
	rm -rf vendor

# for when you want to use SSH keys with GitHub
github-ssh:
	git config url."git@github.com:".insteadOf "https://github.com/"
	git submodule foreach --recursive 'git config url."git@github.com:".insteadOf "https://github.com/"'

#- conditionally re-builds the Nim compiler (not usually needed, because `make update` calls this rule; delete $(NIM_BINARY) to force it)
#- allows parallel building with the '+' prefix
#- forces a rebuild of csources, Nimble and a complete compiler rebuild, in case we're called after pulling a new Nim version
#- uses our Git submodules for csources and Nimble (Git doesn't let us place them in another submodule)
#- build_all.sh looks at the parent dir to decide whether to copy the resulting csources binary there,
#  but this is broken when using symlinks, so build csources separately (we get parallel compiling as a bonus)
#- Windows is a special case, as usual
#- macOS is also a special case, with its "ln" not supporting "-r"
#- the AppVeyor 32-build is done on a 64-bit image, so we need to override the architecture detection with ARCH_OVERRIDE
build-nim: | sanity-checks
	+ NIM_BUILD_MSG="$(BUILD_MSG) Nim compiler" \
		V=$(V) \
		CC=$(CC) \
		MAKE=$(MAKE) \
		ARCH_OVERRIDE=$(ARCH_OVERRIDE) \
		"$(CURDIR)/build_nim.sh" "$(NIM_DIR)" ../Nim-csources ../nimble "$(CI_CACHE)"

#- initialises and updates the Git submodules
#- manages the AppVeyor cache of Nim compiler binaries
#- deletes the ".nimble" dir to force the execution of the "deps" target
#- deletes and recreates "nimbus.nims" which on Windows is a copy instead of a proper symlink
#- allows parallel building with the '+' prefix
#- rebuilds the Nim compiler if the corresponding submodule is updated
$(NIM_BINARY) update: | sanity-checks
	git submodule update --init --recursive
	rm -rf $(NIMBLE_DIR) nimbus.nims && \
		$(MAKE) nimbus.nims
	+ $(MAKE) build-nim

# don't use this target, or you risk updating dependency repos that are not ready to be used in Nimbus
update-remote:
	git submodule update --remote

# runs `git status` in all Git repos
status: | $(REPOS)
	$(eval CMD := $(GIT_STATUS))
	$(RUN_CMD_IN_ALL_REPOS)

MIN_GO_VER := 1.12.0
go-checks:
	which go &>/dev/null || { echo "Go compiler not installed. Aborting."; exit 1; }
	GO_VER="$$(go version | sed 's/^.*go\(\S\+\).*$$/\1/')"; \
	       [[ $$(echo -e "$${GO_VER}\n$(MIN_GO_VER)" | sort -t '.' -k 1,1 -k 2,2 -k 3,3 -g | head -n 1) == "$(MIN_GO_VER)" ]] || \
	       { echo "Minimum Go compiler version required: $(MIN_GO_VER). Version available: $$GO_VER. Aborting."; exit 1; }

vendor/go/bin/p2pd: | go-checks
	cd vendor/go/src/github.com/libp2p/go-libp2p-daemon && \
		$(ENV_SCRIPT) go get ./... && \
		$(ENV_SCRIPT) go install ./...

test-libp2p-daemon: | vendor/go/bin/p2pd deps
	cd vendor/nim-libp2p && \
		$(ENV_SCRIPT) nim c -r $(NIM_PARAMS) tests/testdaemon.nim && \
		rm -f tests/testdaemon

libnimbus.so: | build deps nat-libs
	echo -e $(BUILD_MSG) "build/$@" && \
		$(ENV_SCRIPT) nim c --app:lib --noMain -d:"chronicles_sinks=textlines" --debuginfo --opt:speed --lineTrace:off $(NIM_PARAMS) -o:build/$@.0 wrappers/wrapper.nim && \
		rm -f build/$@ && \
		ln -s $@.0 build/$@

wrappers: | build deps nat-libs libnimbus.so go-checks
	echo -e $(BUILD_MSG) "build/C_wrapper_example" && \
		$(CC) wrappers/wrapper_example.c -Wl,-rpath,'$$ORIGIN' -Lbuild -lnimbus -lm -g -o build/C_wrapper_example
	echo -e $(BUILD_MSG) "build/go_wrapper_example" && \
		go build -o build/go_wrapper_example wrappers/wrapper_example.go

libnimbus.a: | build deps nat-libs
	echo -e $(BUILD_MSG) "build/$@" && \
		$(ENV_SCRIPT) nim c --app:staticlib --noMain $(NIM_PARAMS) -o:build/$@ wrappers/wrapper.nim

wrappers-static: | build deps nat-libs libnimbus.a go-checks
	echo -e $(BUILD_MSG) "build/C_wrapper_example_static" && \
		$(CC) wrappers/wrapper_example.c -static -pthread -Lbuild -lnimbus -lm -ldl -g -o build/C_wrapper_example_static
	echo -e $(BUILD_MSG) "build/go_wrapper_example_static" && \
		go build -ldflags "-linkmode external -extldflags '-static -ldl'" -o build/go_wrapper_example_static wrappers/wrapper_example.go

# https://bitbucket.org/nimcontrib/ntags/ - currently fails with "out of memory"
ntags:
	ntags -R .

#- a few files need to be excluded because they trigger an infinite loop in https://github.com/universal-ctags/ctags
#- limiting it to Nim files, because there are a lot of C files we don't care about
ctags:
	ctags -R --verbose=yes \
	--langdef=nim \
	--langmap=nim:.nim \
	--regex-nim='/(\w+)\*?\s*=\s*object/\1/c,class/' \
	--regex-nim='/(\w+)\*?\s*=\s*enum/\1/e,enum/' \
	--regex-nim='/(\w+)\*?\s*=\s*tuple/\1/t,tuple/' \
	--regex-nim='/(\w+)\*?\s*=\s*range/\1/s,subrange/' \
	--regex-nim='/(\w+)\*?\s*=\s*proc/\1/p,proctype/' \
	--regex-nim='/proc\s+(\w+)/\1/f,procedure/' \
	--regex-nim='/func\s+(\w+)/\1/f,procedure/' \
	--regex-nim='/method\s+(\w+)/\1/m,method/' \
	--regex-nim='/proc\s+`([^`]+)`/\1/o,operator/' \
	--regex-nim='/template\s+(\w+)/\1/u,template/' \
	--regex-nim='/macro\s+(\w+)/\1/v,macro/' \
	--languages=nim \
	--exclude=nimcache \
	--exclude='*/Nim/tinyc' \
	--exclude='*/Nim/tests' \
	--exclude='*/Nim/csources' \
	--exclude=nimbus/genesis_alloc.nim \
	--exclude=$(REPOS_DIR)/nim-bncurve/tests/tvectors.nim \
	.

############################
# Windows-specific section #
############################

ifeq ($(OS), Windows_NT)
  # no tabs allowed for indentation here

  # the AppVeyor 32-build is done on a 64-bit image, so we need to override the architecture detection
  ifeq ($(ARCH_OVERRIDE), x86)
    ARCH := x86
  else
    ifeq ($(PROCESSOR_ARCHITEW6432), AMD64)
      ARCH := x64
    else
      ifeq ($(PROCESSOR_ARCHITECTURE), AMD64)
        ARCH := x64
      endif
      ifeq ($(PROCESSOR_ARCHITECTURE), x86)
        ARCH := x86
      endif
    endif
  endif

  ifeq ($(ARCH), x86)
    ROCKSDB_DIR := x86
  endif
  ifeq ($(ARCH), x64)
    ROCKSDB_DIR := x64
  endif

  ROCKSDB_ARCHIVE := nimbus-deps.zip
  ROCKSDB_URL := https://github.com/status-im/nimbus-deps/releases/download/nimbus-deps/$(ROCKSDB_ARCHIVE)
  CURL := curl -O -L
  UNZIP := unzip -o

#- back to tabs
#- copied from .appveyor.yml
#- this is why we can't delete the whole "build" dir in the "clean" target
fetch-dlls: | build deps
	cd build && \
		$(CURL) $(ROCKSDB_URL) && \
		$(CURL) https://nim-lang.org/download/dlls.zip && \
		$(UNZIP) $(ROCKSDB_ARCHIVE) && \
		cp -a $(ROCKSDB_DIR)/*.dll . && \
		$(UNZIP) dlls.zip && \
		mkdir -p ../vendor/nim-beacon-chain/build && \
		cp -a *.dll ../vendor/nim-beacon-chain/build/
endif