build_style: Add gemspec build_style

Manual.md

@@ -781,6 +781,12 @@ with the character `r` in the `version` variable. The `distfiles`
 location will automatically be set as well as the package made to depend
 on `R`.
 
+- `gemspec` For packages that use
+[gemspec](https://guides.rubygems.org/specification-reference/) files for building a ruby
+gem and then installing it. The gem command can be overridden by `gem_cmd`. `configure_args`
+can be used to pass arguments during compilation. If your package does not make use of compiled
+extensions consider using the `gem` build style instead.
+
 - `gem` For packages that are installed using gems from [RubyGems](https://rubygems.org/).
 The gem command can be overridden by `gem_cmd`. `noarch` is set unconditionally and `distfiles`
 is set by the build style if the template does not do so. If your gem provides extensions which

common/build-style/gemspec.sh

@@ -0,0 +1,187 @@
+#
+# This helper is for templates using gemspec files from upstream or Rubygems.
+#
+do_build() {
+	: ${gem_cmd:=gem}
+	: ${gemspec:=${pkgname#ruby-}.gemspec}
+
+	# Fix packages that keep Gem.gemspec as the name instead of the proper
+	# $pkgname.gemspec
+	if [ -f Gem.gemspec ]; then
+		gemspec=Gem.gemspec
+	fi
+
+	if [ -f .gemspec ]; then
+		gemspec=.gemspec
+	fi
+
+	# Hardcode name and version just in case they try something funny like
+	# requiring RELEASE to be on the environment to not append -rc0 to version
+	# Some even forget to update the version in the gemspec after releasing
+	sed -ri "s|(\.name .*)=.*|\1 = \"${pkgname#ruby-}\"|g" $gemspec
+	sed -ri "s|(\.version .*)=.*|\1 = \"${version}\"|g" $gemspec
+
+	# Replace use of `git ls-files` with find, use printf so we can print without starting
+	# dot-slash path
+	sed -i 's|`git ls-files`|`find . -type f -printf "%P\\n"`|g' $gemspec
+
+	# Sadly ruby isn't capable of handling nullbytes in a command so we have to use
+	# -print0, then try using sed to remove the suffix
+	# The end result is:
+	# `find . -type f -print0 | sed -e "s@\\./@@g"`
+	sed -i 's|`git ls-files -z`|`find . -type f -print0 \| sed -e "s@\\\\./@@g"`|g' $gemspec
+
+	if [ "$CROSS_BUILD" ]; then
+		# Create a .extconf file that forces the Makefile to use our environment
+		# this allows us to cross-compile like it is done with meson cross-files
+		cat>append<<EOF
+RbConfig::MAKEFILE_CONFIG['CPPFLAGS'] = ENV['CPPFLAGS'] if ENV['CPPFLAGS']
+\$CPPFLAGS = ENV['CPPFLAGS'] if ENV['CPPFLAGS']
+RbConfig::MAKEFILE_CONFIG['CC'] = ENV['CC'] if ENV['CC']
+RbConfig::MAKEFILE_CONFIG['CXX'] = ENV['CXX'] if ENV['CXX']
+RbConfig::MAKEFILE_CONFIG['LD'] = ENV['LD'] if ENV['LD']
+RbConfig::MAKEFILE_CONFIG['CFLAGS'] = ENV['CFLAGS'] if ENV['CFLAGS']
+RbConfig::MAKEFILE_CONFIG['CXXFLAGS'] = ENV['CXXFLAGS'] if ENV['CXXFLAGS']
+RbConfig::MAKEFILE_CONFIG['AR'] = ENV['AR'] if ENV['AR']
+RbConfig::MAKEFILE_CONFIG['RANLIB'] = ENV['RANLIB'] if ENV['RANLIB']
+EOF
+
+		# Patch all instances of extconf that use create_makefile
+		for f in $(find . -type f -name 'extconf.rb'); do
+			if [ ! -f ${f}.orig ]; then
+				# Ignore extconf files that do not create makefiles
+				grep -q create_makefile $f || continue
+				# Create a backup which we will restore later
+				cp $f ${f}.orig
+				# Patch extconf.rb for cross compile
+				cat append ${f}.orig >> $f
+			fi
+		done
+	fi
+
+	# If we are downloading a gem file then create a spec out of it
+	for f in $distfiles; do
+		if [ "${f##*.}" = "gem" ]; then
+			$gem_cmd spec \
+				"${XBPS_SRCDISTDIR}/${pkgname}-${version}/${f##*/}" \
+				--ruby > $gemspec
+		fi
+	done
+
+	$gem_cmd build --verbose ${gemspec}
+
+	if [ "$CROSS_BUILD" ]; then
+		# Restore previous extconf.rb which we ship.
+		find . -type f -name 'extconf.rb.orig' | while read -r f; do
+			mv $f ${f%.*}
+		done
+	fi
+}
+
+do_install() {
+	: ${gem_cmd:=gem}
+
+	local _GEMDIR _INSTDIR _TARGET_PLATFORM _HOST_PLATFORM _HOST_EXT_DIR _TARGET_EXT_DIR
+
+	_GEMDIR=$($gem_cmd env gemdir)
+	_INSTDIR=${DESTDIR}/${_GEMDIR}/gems/${pkgname#ruby-}-${version}
+
+	if [ "$CROSS_BUILD" ]; then
+		# Convert to the platforms used in our ruby packages
+		case "$XBPS_TARGET_MACHINE" in
+			x86_64) _TARGET_PLATFORM=x86_64-linux ;;
+			x86_64-musl) _TARGET_PLATFORM=x86_64-linux-musl ;;
+			i686) _TARGET_PLATFORM=i686-linux ;;
+			i686-musl) _TARGET_PLATFORM=i686-linux-musl ;;
+			armv7l|armv7hf) _TARGET_PLATFORM=armv7l-linux-eabihf ;;
+			armv6l|armv6hf) _TARGET_PLATFORM=arm-linux-eabihf ;;
+			armv7l-musl|armv7hf-musl) _TARGET_PLATFORM=armv7l-linux-musleabihf ;;
+			armv6l-musl|armv6hf-musl) _TARGET_PLATFORM=arm-linux-musleabihf ;;
+			aarch64) _TARGET_PLATFORM=aarch64-linux ;;
+			aarch64-musl) _TARGET_PLATFORM=aarch64-linux-musl ;;
+		esac
+
+		case "$XBPS_MACHINE" in
+			x86_64) _HOST_PLATFORM=x86_64-linux ;;
+			x86_64-musl) _HOST_PLATFORM=x86_64-linux-musl ;;
+			i686) _HOST_PLATFORM=i686-linux ;;
+			i686-musl) _HOST_PLATFORM=i686-linux-musl ;;
+			armv7l|armv7hf) _HOST_PLATFORM=armv7l-linux-eabihf ;;
+			armv6l|armv6hf) _HOST_PLATFORM=arm-linux-eabihf ;;
+			armv7l-musl|armv7hf-musl) _HOST_PLATFORM=armv7l-linux-musleabihf ;;
+			armv6l-musl|armv6hf-musl) _HOST_PLATFORM=arm-linux-musleabihf ;;
+			aarch64) _HOST_PLATFORM=aarch64-linux ;;
+			aarch64-musl) _HOST_PLATFORM=aarch64-linux-musl ;;
+		esac
+	fi
+
+	$gem_cmd install \
+		--local \
+		--install-dir ${DESTDIR}/${_GEMDIR} \
+		--bindir ${DESTDIR}/usr/bin \
+		--ignore-dependencies \
+		--no-document \
+		--verbose \
+		"${pkgname#ruby-}-${version}.gem" \
+		-- $configure_args
+
+	# Remove cache
+	rm -rf ${DESTDIR}/${_GEMDIR}/cache
+
+	# Remove ext directory, they are only source code and configuration
+	# The actual extensions are in a arch path guarded
+	rm -rf ${_INSTDIR}/ext
+
+	# Remove duplicated library that is available in a arch guarded
+	# extension
+	rm -rf ${_INSTDIR}/lib/*.so
+
+	# Remove installed tests and benchmarks
+	rm -rf ${_INSTDIR}/{test,tests,autotest,benchmark,benchmarks,script,examples,demo}
+
+	# Remove files shipped on the root of the gem, most of the time they are useless
+	find ${_INSTDIR} -maxdepth 1 -type f -delete
+
+	# Remove unnecessary files
+	find ${DESTDIR}/${_GEMDIR}/extensions \( -name mkmf.log -o -name gem_make.out \) -delete
+
+	# Place manpages in usr/share/man/man[0-9]
+	find ${_INSTDIR}/man -type f -name '*.[0-8n]' | while read -r m; do
+		vman ${m}
+	done
+
+	rm -rf "${_INSTDIR}/man"
+
+	# Place executables in /usr/bin
+	if [ -d "${_INSTDIR}/bin" ]; then
+		for f in "${_INSTDIR}"/bin/*; do
+			vbin "${f}"
+		done
+	fi
+
+	rm -rf ${_INSTDIR}/bin
+
+	# Place conf files in their places
+	find ${_INSTDIR}/etc -type f | while read -r c; do
+		vmkdir $(dirname ${c})
+		mv ${c} "${DESTDIR}/${c##*${_INSTDIR}/etc/}/"
+	done
+
+	rm -rf ${_INSTDIR}/etc
+
+	if [ "$CROSS_BUILD" ]; then
+		# Path to the extensions on a package, ruby installs against the platform
+		# of the host, so we have to move them to the correct place
+		_HOST_EXT_DIR="${DESTDIR}/${_GEMDIR}/extensions/${_HOST_PLATFORM}"
+		_TARGET_EXT_DIR="${DESTDIR}/${_GEMDIR}/extensions/${_TARGET_PLATFORM}"
+
+		if [ -d ${_HOST_EXT_DIR} ]; then
+			mv ${_HOST_EXT_DIR} ${_TARGET_EXT_DIR}
+		fi
+
+		# Fix Makefile locations to point to the correct platform
+		for f in $(find ${DESTDIR}/${_GEMDIR} -type f -name 'Makefile'); do
+			sed -i "s|${_HOST_PLATFORM}|${_TARGET_PLATFORM}|g" $f
+		done
+	fi
+}

common/environment/build-style/gemspec.sh

@@ -0,0 +1,3 @@
+lib32disabled=yes
+hostmakedepends+=" ruby-devel"
+makedepends+=" ruby-devel"