dev-lang/rust-common: Sync with Gentoo

It's from Gentoo commit ffb71a926f0e590260071e0b6ebdc6fa57595515.

sdk_container/src/third_party/portage-stable/dev-lang/rust-common/Manifest

@@ -10,3 +10,5 @@ DIST rustc-1.85.1-src.tar.xz 274028992 BLAKE2B 1dddbbc0d14fe9551fd2eb59a47521ac7
 DIST rustc-1.85.1-src.tar.xz.asc 801 BLAKE2B 07409ef6c044b72394a28dfd5b5decb237ca540714010a4f81e4213a3bf7ffb2e14029789f930cea0dab115a6e986859f6cdefd3798be780c2ff21c3e5fa6593 SHA512 7f19653fd05c89390a4073f5184ca162863b7116cc4d8867a5aa4304568880707ebb9f9dda166d7d04f30b2df6ed223eedd98df1744f809773054edfcd2385ff
 DIST rustc-1.86.0-src.tar.xz 275696736 BLAKE2B 9f33a710a3e567d92f56091920643f5ef2ddf2ad52acb5d9ee78496a7b5dbc10da5a51c72cf2a6f66d543a531d3138a49767c98501ae4e885e03988d2ccfbb59 SHA512 9ce195e24a03765f7163de16271e3d19d731d4b80fcc2bfd919106c9d42543eade018f712f6947ea3c6e57c6cb2e6841596aa668d608b8da15101a7da14f3097
 DIST rustc-1.86.0-src.tar.xz.asc 801 BLAKE2B 3e10a3894c7eee68d37bc5707d797548119f830667e27e652a199d13633199713bd01bd0f41a5f2af3c682561903e36abe27b36ef78d9a1d65bdf485527d2c15 SHA512 0b74dab9ee56d0a08e26e9cd40f722e4d99de63ac678f969f0c54d50737074fb28e170db5a36ce2627ec332e5ce3bb8a92167aefbccff7c70e4cb057bc0a94ac
+DIST rustc-1.87.0_beta20250420-src.tar.xz 283544556 BLAKE2B 70a59c7d695e881a4e21d500f19b7d83e3a86bc8d5dfaaaa28a4cd4631b12937a2743119e3181e84af7b348386c672f4e62675da8cfb399095fcdda527b072e0 SHA512 37e62954c21b0d5c232dca1d0fe476b165eb63b7315c1fcaa18068707f4fd00e2def09968ee1d243f62cb3eae3fbb4381493b8505179342705998dce08e23afe
+DIST rustc-1.87.0_beta20250420-src.tar.xz.asc 801 BLAKE2B c0ed0686d3bc612e8b0edb96817928107905220328af81d2f9200552c3edb58d98ae8844f01b7dd20e59e6c0a173f6da11b2cd58d0c3b5d5f0bd8290528ea86c SHA512 e2e694feec13d8fb8d9b50442c0c2e3de5cef0a249730c945124880220e44d481b2109098c5a8479f765384a4298e293e63743c924e0866ed2e5aece3a35c98f

sdk_container/src/third_party/portage-stable/dev-lang/rust-common/rust-common-1.85.1.ebuild

@@ -32,7 +32,7 @@ else
 		verify-sig? ( https://static.rust-lang.org/dist/rustc-${PV}-src.tar.xz.asc )
 	"
 	S="${WORKDIR}/rustc-${MY_PV}-src"
-	KEYWORDS="~amd64 ~arm ~arm64 ~loong ~mips ~ppc ~ppc64 ~riscv ~sparc ~x86"
+	KEYWORDS="amd64 arm arm64 ~loong ~mips ppc ppc64 ~riscv ~sparc x86"
 fi
 
 LICENSE="|| ( MIT Apache-2.0 ) BSD BSD-1 BSD-2 BSD-4"

sdk_container/src/third_party/portage-stable/dev-lang/rust-common/rust-common-1.87.0_beta20250420.ebuild

@@ -0,0 +1,73 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/rust.asc
+inherit shell-completion verify-sig
+
+DESCRIPTION="Common files shared between multiple slots of Rust"
+HOMEPAGE="https://www.rust-lang.org/"
+
+if [[ ${PV} = *9999* ]]; then
+	inherit git-r3
+	# In case cargo is not in sync we'll fetch it as a submodule
+	# Nightly users will probably already have the repo cloned and up-to-date anyway.
+	EGIT_REPO_URI="https://github.com/rust-lang/rust.git"
+	EGIT_SUBMODULES=( "-*" "src/tools/cargo" )
+elif [[ ${PV} == *beta* ]]; then
+	# Identify the snapshot date of the beta release:
+	# curl -Ls static.rust-lang.org/dist/channel-rust-beta.toml | grep beta-src.tar.xz
+	MY_PV=beta
+	betaver=${PV//*beta}
+	BETA_SNAPSHOT="${betaver:0:4}-${betaver:4:2}-${betaver:6:2}"
+	SRC_URI="https://static.rust-lang.org/dist/${BETA_SNAPSHOT}/rustc-beta-src.tar.xz -> rustc-${PV}-src.tar.xz
+		verify-sig? ( https://static.rust-lang.org/dist/${BETA_SNAPSHOT}/rustc-beta-src.tar.xz.asc
+			-> rustc-${PV}-src.tar.xz.asc )
+	"
+	S="${WORKDIR}/rustc-${MY_PV}-src"
+else
+	MY_PV=${PV}
+	SRC_URI="https://static.rust-lang.org/dist/rustc-${PV}-src.tar.xz
+		verify-sig? ( https://static.rust-lang.org/dist/rustc-${PV}-src.tar.xz.asc )
+	"
+	S="${WORKDIR}/rustc-${MY_PV}-src"
+	KEYWORDS="~amd64 ~arm ~arm64 ~loong ~mips ~ppc ~ppc64 ~riscv ~sparc ~x86"
+fi
+
+LICENSE="|| ( MIT Apache-2.0 ) BSD BSD-1 BSD-2 BSD-4"
+SLOT="0"
+
+# Legacy non-slotted versions bash completions will collide.
+RDEPEND="
+	!dev-lang/rust:stable
+	!dev-lang/rust-bin:stable
+"
+BDEPEND="verify-sig? ( sec-keys/openpgp-keys-rust )"
+
+src_unpack() {
+	if [[ ${PV} == *9999* ]]; then
+		git-r3_src_unpack
+	else
+		if use verify-sig ; then
+			verify-sig_verify_detached "${DISTDIR}"/rustc-${PV}-src.tar.xz "${DISTDIR}"/rustc-${PV}-src.tar.xz.asc
+		fi
+
+		# Avoid unpacking the whole tarball which would need check-reqs
+		tar -xf "${DISTDIR}"/rustc-${PV}-src.tar.xz \
+			"rustc-${MY_PV}-src/src/tools/cargo/src/etc/"{_cargo,cargo.bashcomp.sh} || die
+	fi
+}
+
+src_configure() {
+	:
+}
+
+src_compile() {
+	:
+}
+
+src_install() {
+	newbashcomp src/tools/cargo/src/etc/cargo.bashcomp.sh cargo
+	dozshcomp src/tools/cargo/src/etc/_cargo
+}