#$(call bb-install, \
#    1 target, \               # name (lowercase)
#    2 variable, \             # name (uppercase)
#    3 gfortran, \             # signifies a GCC ABI (e.g. libgfortran version) dependency
#    4 cxx11)                  # signifies a cxx11 ABI dependency

define bb-install
include $$(SRCDIR)/$1.version
TRIPLET_VAR := BB_TRIPLET
ifeq ($(3),true)
TRIPLET_VAR := $$(TRIPLET_VAR)_LIBGFORTRAN
endif
ifeq ($(4),true)
# Darwin and FreeBSD use `clang` instead of `gcc`, so they don't have a cxx11 string ABI break
ifeq (,$(filter $(OS),Darwin FreeBSD))
TRIPLET_VAR := $$(TRIPLET_VAR)_CXXABI
endif
endif

# Look for JLL version within Project.toml in stdlib/
$(2)_STDLIB_PATH := $(JULIAHOME)/stdlib/$$($(2)_JLL_NAME)_jll

# If the file doesn't exist (e.g. we're downloading a JLL release for something
# that we don't actually ship) silently continue despite the Project.toml file missing.
$(2)_JLL_VER ?= $$(shell [ -f $$($(2)_STDLIB_PATH)/Project.toml ] && grep "^version" $$($(2)_STDLIB_PATH)/Project.toml | sed -E 's/version[[:space:]]*=[[:space:]]*"?([^"]+)"?/\1/')

# Allow things to override which JLL we pull from, e.g. libLLVM_jll vs. libLLVM_assert_jll
$(2)_JLL_DOWNLOAD_NAME ?= $$($(2)_JLL_NAME)

# Allow things to provide platform tags
$(2)_JLL_TAGS ?=

$(2)_BB_TRIPLET := $$($$(TRIPLET_VAR))
$(2)_JLL_VER_NOPLUS := $$(firstword $$(subst +,$(SPACE),$$($(2)_JLL_VER)))
$(2)_JLL_BASENAME := $$($(2)_JLL_DOWNLOAD_NAME).v$$($(2)_JLL_VER).$$($(2)_BB_TRIPLET)$$($(2)_JLL_TAGS).tar.gz
$(2)_BB_URL := https://github.com/JuliaBinaryWrappers/$$($(2)_JLL_DOWNLOAD_NAME)_jll.jl/releases/download/$$($(2)_JLL_DOWNLOAD_NAME)-v$$($(2)_JLL_VER)/$$($(2)_JLL_DOWNLOAD_NAME).v$$($(2)_JLL_VER_NOPLUS).$$($(2)_BB_TRIPLET)$$($(2)_JLL_TAGS).tar.gz

$$(SRCCACHE)/$$($(2)_JLL_BASENAME): | $$(SRCCACHE)
	$$(JLDOWNLOAD) $$@ $$($(2)_BB_URL)

stage-$(strip $1): $$(SRCCACHE)/$$($(2)_JLL_BASENAME)
install-$(strip $1): $$(build_prefix)/manifest/$(strip $1)

reinstall-$(strip $1):
	+$$(MAKE) uninstall-$(strip $1)
	+$$(MAKE) stage-$(strip $1)
	+$$(MAKE) install-$(strip $1)

UNINSTALL_$(strip $1) := $$($(2)_JLL_BASENAME:.tar.gz=) bb-uninstaller

$$(build_prefix)/manifest/$(strip $1): $$(SRCCACHE)/$$($(2)_JLL_BASENAME) | $(build_prefix)/manifest
	-+[ ! -e $$@ ] || $$(MAKE) uninstall-$(strip $1)
	$$(JLCHECKSUM) $$<
ifneq (bsdtar,$(findstring bsdtar,$(TAR_TEST)))
	@# work-around a gtar bug: they do some complicated work to avoid the mkdir
	@# syscall, which is buggy when working with Tar.jl files so we manually do
	@# the mkdir calls first in a pre-pass
	$(TAR) -tzf $$< | xargs -n 1 dirname | sort -u | (cd $$(build_prefix) && xargs -t mkdir -p)
endif
	$(UNTAR) $$< -C $$(build_prefix)
	echo '$$(UNINSTALL_$(strip $1))' > $$@

# Special "checksum-foo" target to speed up `contrib/refresh_checksums.sh`
checksum-$(1): $$(SRCCACHE)/$$($(2)_JLL_BASENAME)
	$$(JLCHECKSUM) $$<

clean-bb-download-$(1):
	rm -f $$(SRCCACHE)/$$($(2)_JLL_BASENAME)

clean-$(1):
distclean-$(1): clean-bb-download-$(1)
get-$(1): $$(SRCCACHE)/$$($(2)_JLL_BASENAME)
extract-$(1):
configure-$(1):
compile-$(1): get-$(1)
fastcheck-$(1):
check-$(1):

.PHONY: clean-bb-$(1)

endef

define bb-uninstaller
uninstall-$(strip $1):
	-cd $$(build_prefix) && rm -fv -- $$$$($$(TAR) -tzf $$(SRCCACHE)/$2.tar.gz | grep -v '/$$$$')
	-rm -f $$(build_prefix)/manifest/$(strip $1)
endef