#!/usr/bin/make -f

# resolve DEB_VERSION_UPSTREAM DEB_VERSION_UPSTREAM_REVISION
include /usr/share/dpkg/pkg-info.mk

# generate documentation unless nodoc requested
ifeq (,$(filter nodoc,$(DEB_BUILD_OPTIONS)))
DOCS = README.html README.txt
endif

export DEB_BUILD_MAINT_OPTIONS = hardening=+all
export DEB_CFLAGS_MAINT_APPEND  = -Wall -pedantic
export DEB_CXXFLAGS_MAINT_APPEND  = -Wall -pedantic

# trust upstream optimization level unless explicitly disabled
ifeq (,$(filter noopt,$(DEB_BUILD_OPTIONS)))
export DEB_CFLAGS_MAINT_STRIP=-O2
export DEB_CXXFLAGS_MAINT_STRIP=-O2
endif

# generate documentation unless nodoc requested
ifeq (,$(filter nodoc,$(DEB_BUILD_OPTIONS)))
MANPAGES = $(cmd).1
endif

# generate manual pages from output of clap-based Rust binary
#  arguments: 1:MANFILEPATH 2:COMMANDPATH 3:SUBCOMMAND(S)
_help2man = \
 $(eval suffix = $(lastword $(subst ., ,$(1))))\
 $(eval stem = $(patsubst %.$(suffix),%,$(1)))\
 help2man --section $(suffix) --no-info \
 --version-string='$(DEB_VERSION_UPSTREAM)' \
 --name $(shell $(2) $(3) --help | head --lines=1 | xargs -0 shell-quote --) \
 --output '$(stem)$(if $(3),-$(subst $() ,-,$(strip $(3)))).$(suffix)' \
 '$(2)$(if $(3), $(3))' \
 || { $(2) $(3) --help; false; }

mainpkg = wasm-tools
cmd = wasm-tools
subcmds_$(cmd) = \
 parse validate print smith shrink mutate dump objdump strip compose \
 demangle component metadata wit-smith addr2line json-from-wast wast

%:
	dh $@

%.html: %.md
	cmark-gfm $< > $@

%.txt: %.md
	cmark-gfm --to plaintext $< > $@

execute_after_dh_auto_build: $(DOCS)

execute_after_dh_auto_install-arch: debian/$(mainpkg)/usr/bin/$(cmd) $(MANPAGES)
	mkdir --parents debian/build
	$< completion bash > debian/build/bash-completion
	$< completion zsh > debian/build/_$(cmd)

# avoid cleaning unless source is patched
override_dh_auto_clean:
	grep -q playground Cargo.toml || dh_auto_clean --buildsystem rust

override_dh_installdocs:
	dh_installdocs -- $(DOCS)

override_dh_gencontrol:
	dh_gencontrol -plibrust-wasm-tools-dev -- \
	 -V'rust:Version:zero-based=$(patsubst 1.%,0.%,$(DEB_VERSION_UPSTREAM))+$(DEB_VERSION_UPSTREAM_REVISION)'
	dh_gencontrol --remaining-packages

# build manpages
$(cmd).1: %.1: debian/$(mainpkg)/usr/bin/%
	$(call _help2man,$@,$<)
	set -e; $(foreach x,$(subcmds_$(cmd)),\
	 $(call _help2man,$@,$<,$x);)