dev-lang/ruby: backport ruby 3.0 gem_prelude.rb

The ruby26 and ruby30 gem_prelude.rb fails gracefully when the
did_you_mean gem cannot be loaded. Backport the ruby30 version since it
is more modular. This helps with cases where the did_you_mean gem is not
yet installed as part of a fresh ruby install.

Bug: https://bugs.gentoo.org/705346
Package-Manager: Portage-3.0.18, Repoman-3.0.2
Signed-off-by: Hans de Graaff <graaff@gentoo.org>

2 files changed, 279 insertions, 0 deletions

diff --git a/dev-lang/ruby/files/2.7/003-did-you-mean.patch b/dev-lang/ruby/files/2.7/003-did-you-mean.patch
new file mode 100644
index 000000000000..26beb65a488b
--- /dev/null
+++ b/dev-lang/ruby/files/2.7/003-did-you-mean.patch
@@ -0,0 +1,16 @@
+--- ruby27/gem_prelude.rb	2021-04-28 19:07:46.875571113 +0200
++++ ruby30/gem_prelude.rb	2021-04-28 19:07:35.971511765 +0200
+@@ -1,2 +1,11 @@
+-require 'rubygems.rb' if defined?(Gem)
+-require 'did_you_mean' if defined?(DidYouMean)
++begin
++  require 'rubygems'
++rescue LoadError
++  warn "`RubyGems' were not loaded."
++end if defined?(Gem)
++
++begin
++  require 'did_you_mean'
++rescue LoadError
++  warn "`did_you_mean' was not loaded."
++end if defined?(DidYouMean)
diff --git a/dev-lang/ruby/ruby-2.7.3-r1.ebuild b/dev-lang/ruby/ruby-2.7.3-r1.ebuild
new file mode 100644
index 000000000000..682230b1d99e
--- /dev/null
+++ b/dev-lang/ruby/ruby-2.7.3-r1.ebuild
@@ -0,0 +1,263 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit autotools flag-o-matic multilib
+
+MY_P="${PN}-$(ver_cut 1-3)"
+S=${WORKDIR}/${MY_P}
+
+SLOT=$(ver_cut 1-2)
+MY_SUFFIX=$(ver_rs 1 '' ${SLOT})
+RUBYVERSION=${SLOT}.0
+
+DESCRIPTION="An object-oriented scripting language"
+HOMEPAGE="https://www.ruby-lang.org/"
+SRC_URI="https://cache.ruby-lang.org/pub/ruby/${SLOT}/${MY_P}.tar.xz"
+
+LICENSE="|| ( Ruby-BSD BSD-2 )"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~mips ~ppc ~ppc64 ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+IUSE="berkdb debug doc examples gdbm ipv6 jemalloc jit libressl +rdoc rubytests socks5 +ssl static-libs systemtap tk xemacs"
+
+RDEPEND="
+	berkdb? ( sys-libs/db:= )
+	gdbm? ( sys-libs/gdbm:= )
+	jemalloc? ( dev-libs/jemalloc )
+	jit? ( || ( sys-devel/gcc:* sys-devel/clang:* ) )
+	ssl? (
+		!libressl? ( dev-libs/openssl:0= )
+		libressl? ( dev-libs/libressl )
+	)
+	socks5? ( >=net-proxy/dante-1.1.13 )
+	systemtap? ( dev-util/systemtap )
+	tk? (
+		dev-lang/tcl:0=[threads]
+		dev-lang/tk:0=[threads]
+	)
+	dev-libs/libyaml
+	dev-libs/libffi:=
+	sys-libs/readline:0=
+	sys-libs/zlib
+	>=app-eselect/eselect-ruby-20191222
+"
+
+DEPEND="${RDEPEND}"
+
+BUNDLED_GEMS="
+	>=dev-ruby/minitest-5.13.0[ruby_targets_ruby27]
+	>=dev-ruby/net-telnet-0.2.0[ruby_targets_ruby27]
+	>=dev-ruby/power_assert-1.1.7[ruby_targets_ruby27]
+	>=dev-ruby/rake-13.0.1[ruby_targets_ruby27]
+	>=dev-ruby/test-unit-3.3.4[ruby_targets_ruby27]
+	>=dev-ruby/xmlrpc-0.3.0[ruby_targets_ruby27]
+"
+
+PDEPEND="
+	${BUNDLED_GEMS}
+	virtual/rubygems[ruby_targets_ruby27]
+	>=dev-ruby/bundler-2.1.4[ruby_targets_ruby27]
+	>=dev-ruby/did_you_mean-1.3.1[ruby_targets_ruby27]
+	>=dev-ruby/json-2.0.2[ruby_targets_ruby27]
+	rdoc? ( >=dev-ruby/rdoc-6.1.2[ruby_targets_ruby27] )
+	xemacs? ( app-xemacs/ruby-modes )"
+
+src_prepare() {
+	# 005 does not compile bigdecimal and is questionable because it
+	# compiles ruby in a non-standard way, may be dropped
+	eapply "${FILESDIR}"/2.7/{002,003,010}*.patch
+
+	einfo "Unbundling gems..."
+	cd "$S"
+	# Remove bundled gems that we will install via PDEPEND, bug
+	# 539700.
+	rm -fr gems/* || die
+	# Don't install CLI tools since they will clash with the gem
+	rm -f bin/{racc,racc2y,y2racc} || die
+	sed -i -e '/executables/ s:^:#:' lib/racc/racc.gemspec || die
+
+	einfo "Removing bundled libraries..."
+	rm -fr ext/fiddle/libffi-3.2.1 || die
+
+	if use prefix ; then
+		# Fix hardcoded SHELL var in mkmf library
+		sed -i -e "s#\(SHELL = \).*#\1${EPREFIX}/bin/sh#" lib/mkmf.rb || die
+
+		if [[ ${CHOST} == *darwin* ]] ; then
+			# avoid symlink loop on Darwin (?!)
+			sed -i \
+				-e '/LIBRUBY_ALIASES=/s/lib$(RUBY_INSTALL_NAME).$(SOEXT)//' \
+				configure.ac || die
+
+			# make ar/libtool hack for Darwin work
+			sed -i \
+				-e "s/ac_cv_prog_ac_ct_AR='libtool/ac_cv_prog_AR='${CHOST}-libtool/" \
+				configure.ac || die
+		fi
+	fi
+
+	eapply_user
+
+	eautoreconf
+}
+
+src_configure() {
+	local modules= myconf=
+
+	# -fomit-frame-pointer makes ruby segfault, see bug #150413.
+	filter-flags -fomit-frame-pointer
+	# In many places aliasing rules are broken; play it safe
+	# as it's risky with newer compilers to leave it as it is.
+	append-flags -fno-strict-aliasing
+
+	# Socks support via dante
+	if use socks5 ; then
+		# Socks support can't be disabled as long as SOCKS_SERVER is
+		# set and socks library is present, so need to unset
+		# SOCKS_SERVER in that case.
+		unset SOCKS_SERVER
+	fi
+
+	# Increase GC_MALLOC_LIMIT if set (default is 8000000)
+	if [ -n "${RUBY_GC_MALLOC_LIMIT}" ] ; then
+		append-flags "-DGC_MALLOC_LIMIT=${RUBY_GC_MALLOC_LIMIT}"
+	fi
+
+	# ipv6 hack, bug 168939. Needs --enable-ipv6.
+	use ipv6 || myconf="${myconf} --with-lookup-order-hack=INET"
+
+	# Determine which modules *not* to build depending in the USE flags.
+	if ! use berkdb ; then
+		modules="${modules},dbm"
+	fi
+	if ! use gdbm ; then
+		modules="${modules},gdbm"
+	fi
+	if ! use ssl ; then
+		modules="${modules},openssl"
+	fi
+	if ! use tk ; then
+		modules="${modules},tk"
+	fi
+
+	# Provide an empty LIBPATHENV because we disable rpath but we do not
+	# need LD_LIBRARY_PATH by default since that breaks USE=multitarget
+	# #564272
+	INSTALL="${EPREFIX}/usr/bin/install -c" LIBPATHENV="" econf \
+		--program-suffix=${MY_SUFFIX} \
+		--with-soname=ruby${MY_SUFFIX} \
+		--with-readline-dir="${EPREFIX}"/usr \
+		--enable-shared \
+		--enable-pthread \
+		--disable-rpath \
+		--with-out-ext="${modules}" \
+		$(use_with jemalloc jemalloc) \
+		$(use_enable jit jit-support ) \
+		$(use_enable socks5 socks) \
+		$(use_enable systemtap dtrace) \
+		$(use_enable doc install-doc) \
+		--enable-ipv6 \
+		$(use_enable static-libs static) \
+		$(use_enable static-libs install-static-library) \
+		$(use_with static-libs static-linked-ext) \
+		$(use_enable debug) \
+		${myconf} \
+		--enable-option-checking=no
+
+	# Makefile is broken because it lacks -ldl
+	rm -rf ext/-test-/popen_deadlock || die
+}
+
+src_compile() {
+	emake V=1 EXTLDFLAGS="${LDFLAGS}" MJIT_CFLAGS="${CFLAGS}" MJIT_OPTFLAGS="" MJIT_DEBUGFLAGS=""
+}
+
+src_test() {
+	emake -j1 V=1 test
+
+	elog "Ruby's make test has been run. Ruby also ships with a make check"
+	elog "that cannot be run until after ruby has been installed."
+	elog
+	if use rubytests; then
+		elog "You have enabled rubytests, so they will be installed to"
+		elog "/usr/share/${PN}-${SLOT}/test. To run them you must be a user other"
+		elog "than root, and you must place them into a writeable directory."
+		elog "Then call: "
+		elog
+		elog "ruby${MY_SUFFIX} -C /location/of/tests runner.rb"
+	else
+		elog "Enable the rubytests USE flag to install the make check tests"
+	fi
+}
+
+src_install() {
+	# Remove the remaining bundled gems. We do this late in the process
+	# since they are used during the build to e.g. create the
+	# documentation.
+	einfo "Removing default gems before installation"
+	rm -rf .ext/common/json.rb .ext/common/json ext/json || die
+	rm -rf lib/bundler* lib/rdoc/rdoc.gemspec || die
+	rm -rf lib/did_you_mean* || die
+
+	# Ruby is involved in the install process, we don't want interference here.
+	unset RUBYOPT
+
+	local MINIRUBY=$(echo -e 'include Makefile\ngetminiruby:\n\t@echo $(MINIRUBY)'|make -f - getminiruby)
+
+	LD_LIBRARY_PATH="${S}:${ED}/usr/$(get_libdir)${LD_LIBRARY_PATH+:}${LD_LIBRARY_PATH}"
+
+	if [[ ${CHOST} == *darwin* ]] ; then
+		DYLD_LIBRARY_PATH="${S}:${ED}/usr/$(get_libdir)${DYLD_LIBRARY_PATH+:}${DYLD_LIBRARY_PATH}"
+		export DYLD_LIBRARY_PATH
+	fi
+
+	RUBYLIB="${S}:${ED}/usr/$(get_libdir)/ruby/${RUBYVERSION}"
+	for d in $(find "${S}/ext" -type d) ; do
+		RUBYLIB="${RUBYLIB}:$d"
+	done
+	export LD_LIBRARY_PATH RUBYLIB
+
+	# Create directory for the default gems
+	local gem_home="${EPREFIX}/usr/$(get_libdir)/ruby/gems/${RUBYVERSION}"
+	mkdir -p "${D}/${gem_home}" || die "mkdir gem home failed"
+
+	emake V=1 DESTDIR="${D}" GEM_DESTDIR=${gem_home} install
+
+	# Remove installed rubygems and rdoc copy
+	rm -rf "${ED}/usr/$(get_libdir)/ruby/${RUBYVERSION}/rubygems" || die "rm rubygems failed"
+	rm -rf "${ED}/usr/bin/"gem"${MY_SUFFIX}" || die "rm rdoc bins failed"
+	rm -rf "${ED}/usr/$(get_libdir)/ruby/${RUBYVERSION}"/rdoc* || die "rm rdoc failed"
+	rm -rf "${ED}/usr/bin/"{bundle,bundler,ri,rdoc}"${MY_SUFFIX}" || die "rm rdoc bins failed"
+
+	if use doc; then
+		emake DESTDIR="${D}" GEM_DESTDIR=${gem_home} install-doc
+	fi
+
+	if use examples; then
+		dodoc -r sample
+	fi
+
+	dodoc ChangeLog NEWS doc/NEWS* README*
+
+	if use rubytests; then
+		pushd test
+		insinto /usr/share/${PN}-${SLOT}/test
+		doins -r .
+		popd
+	fi
+}
+
+pkg_postinst() {
+	if [[ ! -n $(readlink "${EROOT}"/usr/bin/ruby) ]] ; then
+		eselect ruby set ruby${MY_SUFFIX}
+	fi
+
+	elog
+	elog "To switch between available Ruby profiles, execute as root:"
+	elog "\teselect ruby set ruby(23|24|...)"
+	elog
+}
+
+pkg_postrm() {
+	eselect ruby cleanup
+}