dev-util/claude-code: add 2.1.20; move to native

Previously, claude-code was installed via npm. Now, they are installing
via a "native" method which basically boils down to a curl|bash
downloading a single claude binary.

This implements the logic needed to get the right binary for arch/elibc
-- in fact, we're adding support for musl and arm with this change.

A major downside of this method: currently, via
/etc/claude-code/managed-settings.json, we're disabling all sorts of
update automagic -- even prior to the move to a "native" install method
-- but if a user somehow doesn't have DISABLE_AUTOUPDATER or
DISABLE_INSTALLATION_CHECKS in their managed-settings.json, claude will
helpfully "fix" their install by installing itself to ~/.local/ without
user consent. This is not-ideal, dangerous behavior that we warn about
on install.

Signed-off-by: Jay Faulkner <jayf@gentoo.org>

dev-util/claude-code/Manifest

@@ -1 +1,5 @@
+DIST claude-amd64-glibc-2.1.20 223852550 BLAKE2B 09c1e351474d1eba77da2a71d21ba2f27c53d9167932772ea502c805cd8ab09473ba9804238c4f1964714b4cf4bc153753c7605c884316bc22d58a030dca65d1 SHA512 d7d399708d73c10c8d4cc5cec4a5dbda1b0e75769a12a857095e43c69d78283f9a56d78117b4f3d51db9882646cd0ba8f0a20e247485708a26557bdd61b06d77
+DIST claude-amd64-musl-2.1.20 216541126 BLAKE2B f4c6d9aad267c4147d816a8e97ac8f17a46c347969f8b86b0cd6364ce58c772e842152135b8fa27b7f5014511be6345e6621d9d583fc25e1bc320c6589ae457f SHA512 842b3d5f8fba9ca4b44c24f3f101f2ca85331b74a0ce92f12ff1d07e5d430962b657eddf464b0bcc0af3961f79cb9b4b685e819e25f65388c15f7d7418f1cc42
+DIST claude-arm64-glibc-2.1.20 216047898 BLAKE2B a3ffae9326518a079997de012a8bce09be8cea99f36dc360372710c34f5a403a14b77631da5beaa06fcba0ee8f57e24623ecf350602597a04267e98ca9b99395 SHA512 f8339c4297408e478551ec949e5574b7043772980579defaca994dd8b78fc93b8a7142c00a4438e7bf593639df83c77923c528e802c546ebaf432c41a0e5ccf8
+DIST claude-arm64-musl-2.1.20 211311930 BLAKE2B 39436953a8d1f6d118915c0ea7b629e71103ad9dc83ee43bca5f5790ebde9d50bd681a31769c3413b8a4d3e9fabed271a5bb194f7f69259a37003ac46f8285b0 SHA512 80a6bdec5daf7dd17e48297df0cb1090d9caee05a028072e24024d210a06a8bc93d78e6efd3b2b40313ced2772b479109433b825f5a1ddc33bf27423c0304fea
 DIST claude-code-2.1.14.tgz 26380819 BLAKE2B c17b811cd9c98ee2aa4616a9811e9015e1988157d35cb1b16cc605d60962e9708b3b4c3f9f01eee2ddcbcb15938fb135b2817ba4588767befb4c98d9c1f55073 SHA512 18ba9b54ef7b37fa85b827f732d58d42f68e35fc12b18263f221135c023f8505742d283a7b1c23574bf5d9889a1dce77b541bb9b835e0dbc48157264f203106a

dev-util/claude-code/claude-code-2.1.20.ebuild

@@ -0,0 +1,61 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DESCRIPTION="Claude Code - an agentic coding tool by Anthropic"
+HOMEPAGE="https://claude.com/product/claude-code"
+
+# NOTE(JayF): Claude code's official install method is now curl|bash
+#             the script is simple: it fetches the latest version,
+#             downloads a manifest of files for that version, and
+#             downloads a single binary claude executable matching.
+#             All this from an unbranded GCS bucket (yikes).
+# https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases/bootstrap.sh
+GCS_BUCKET="https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases"
+SRC_URI="
+	amd64? (
+		elibc_glibc? ( ${GCS_BUCKET}/${PV}/linux-x64/claude -> claude-amd64-glibc-${PV} )
+		elibc_musl?  ( ${GCS_BUCKET}/${PV}/linux-x64-musl/claude -> claude-amd64-musl-${PV} )
+	)
+	arm64? (
+		elibc_glibc? ( ${GCS_BUCKET}/${PV}/linux-arm64/claude -> claude-arm64-glibc-${PV} )
+		elibc_musl?  ( ${GCS_BUCKET}/${PV}/linux-arm64-musl/claude -> claude-arm64-musl-${PV} )
+	)"
+S="${WORKDIR}"
+
+# NOTE(JayF): claude-code is only usable via paid subscription and has a
+#             clickthrough EULA-type license. Please see $HOMEPAGE for
+#             full details.
+LICENSE="all-rights-reserved"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64"
+RESTRICT="bindist mirror"
+QA_PREBUILT="opt/bin/claude"
+RDEPEND="
+	>=net-libs/nodejs-18
+	sys-apps/ripgrep
+"
+
+src_compile() {
+	# Skip, nothing to compile here.
+	:
+}
+
+src_install() {
+	# NOTE(JayF) Literally the file we download is all there is to
+	#            install. It's just a binary. No docs. Nothing else.
+	exeinto /opt/bin
+	newexe "${DISTDIR}/${A[0]}" claude
+
+	insinto /etc/${PN}
+	newins "${FILESDIR}/managed-settings-native.json" managed-settings.json
+}
+
+pkg_postinst() {
+	if ! grep -q DISABLE_INSTALLATION_CHECKS /etc/claude-code/managed-settings.json; then
+		ewarn "Ensure you run etc-update or dispatch-conf before executing claude."
+		ewarn "Failure to properly integrate changes to /etc/claude-code/managed-settings.json"
+		ewarn "may lead to claude installing itself to your homedir without asking."
+	fi
+}

dev-util/claude-code/files/managed-settings-native.json

@@ -0,0 +1,7 @@
+{
+  "env": {
+    "DISABLE_AUTOUPDATER": "1",
+    "DISABLE_INSTALLATION_CHECKS": "1"
+  },
+  "installMethod": "native"
+}