net-fs/samba: Apply Flatcar modifications

- Add a minimal USE flag for only installing libraries
  - Change the Perl run-time dep to build-time only
  - Disable building libraries requiring Python
  - Disable building Perl JSON libraries
  - Limit the size of bundled libraries

Co-authored-by: Sayan Chowdhury <schowdhury@microsoft.com>

sdk_container/src/third_party/coreos-overlay/net-fs/samba/samba-4.18.9.ebuild

@@ -5,6 +5,7 @@ EAPI=8
 
 PYTHON_COMPAT=( python3_{10..11} )
 PYTHON_REQ_USE="threads(+),xml(+)"
+TMPFILES_OPTIONAL=1
 inherit python-single-r1 flag-o-matic waf-utils multilib-minimal linux-info systemd pam tmpfiles
 
 DESCRIPTION="Samba Suite Version 4"
@@ -26,6 +27,7 @@ IUSE="acl addc ads ceph client cluster cpu_flags_x86_aes cups debug fam glusterf
 IUSE+=" iprint json ldap llvm-libunwind pam profiling-data python quota +regedit selinux"
 IUSE+=" snapper spotlight syslog system-heimdal +system-mitkrb5 systemd test unwind winbind"
 IUSE+=" zeroconf"
+IUSE+=" +minimal"  # Flatcar: Only install libraries, not executables.
 
 REQUIRED_USE="${PYTHON_REQUIRED_USE}
 	addc? ( json python !system-mitkrb5 winbind )
@@ -59,14 +61,13 @@ TALLOC_VERSION="2.4.0"
 TDB_VERSION="1.4.8"
 TEVENT_VERSION="0.14.1"
 
+# Flatcar: exclude perl, icu, libtasn1, Parse-Yapp from DEPEND
 COMMON_DEPEND="
 	>=app-arch/libarchive-3.1.2:=[${MULTILIB_USEDEP}]
-	dev-lang/perl:=
+	spotlight? ( dev-libs/icu:=[${MULTILIB_USEDEP}] )
-	dev-libs/icu:=[${MULTILIB_USEDEP}]
 	dev-libs/libbsd[${MULTILIB_USEDEP}]
-	dev-libs/libtasn1:=[${MULTILIB_USEDEP}]
+	!minimal? ( dev-libs/libtasn1:=[${MULTILIB_USEDEP}] )
 	dev-libs/popt[${MULTILIB_USEDEP}]
-	dev-perl/Parse-Yapp
 	>=net-libs/gnutls-3.4.7:=[${MULTILIB_USEDEP}]
 	>=sys-fs/e2fsprogs-1.46.4-r51[${MULTILIB_USEDEP}]
 	>=sys-libs/ldb-2.7.2:=[ldap(+)?,${MULTILIB_USEDEP}]
@@ -117,8 +118,9 @@ COMMON_DEPEND="
 	)
 	zeroconf? ( net-dns/avahi[dbus] )
 "
+# Flatcar: pull in JSON only if json is enabled
 DEPEND="${COMMON_DEPEND}
-	dev-perl/JSON
+	json? ( dev-perl/JSON )
 	net-libs/libtirpc[${MULTILIB_USEDEP}]
 	net-libs/rpcsvc-proto
 	spotlight? ( dev-libs/glib )
@@ -138,6 +140,8 @@ RDEPEND="${COMMON_DEPEND}
 	selinux? ( sec-policy/selinux-samba )
 "
 BDEPEND="${PYTHON_DEPS}
+	dev-lang/perl:=
+	dev-perl/Parse-Yapp
 	app-text/docbook-xsl-stylesheets
 	dev-libs/libxslt
 	virtual/pkgconfig
@@ -248,6 +252,10 @@ multilib_src_configure() {
 		EOF
 	fi
 
+	# Flatcar: we need only the mandatory bundled library, ldb by default.
+	# Without that, configure will fail because of a missing bundled library.
+	bundled_libs="ldb"
+
 	local myconf=(
 		--enable-fhs
 		--sysconfdir="${EPREFIX}/etc"
@@ -358,7 +366,8 @@ multilib_src_install() {
 		newinitd "${CONFDIR}/samba4.initd-r1" samba
 		newconfd "${CONFDIR}/samba4.confd" samba
 
-		dotmpfiles "${FILESDIR}"/samba.conf
+		# Flatcar: do not create samba config if minimal enabled
+		use minimal || dotmpfiles "${FILESDIR}"/samba.conf
 		if ! use addc ; then
 			rm "${D}/$(systemd_get_systemunitdir)/samba.service" \
 				|| die
@@ -376,8 +385,22 @@ multilib_src_install() {
 		insinto /etc/security
 		doins examples/pam_winbind/pam_winbind.conf
 	fi
+
+	# Flatcar: clean up unnecessary files
+	rm -f "${ED%/}"/etc/samba/*
+	rm -f "${ED%/}"/usr/lib*/samba/ldb/*
+	if use minimal ; then
+		mv "${ED%/}"/usr/bin/net "${T}"/
+		rm -f "${ED%/}"/usr/bin/* "${ED%/}"/usr/sbin/*
+		mv "${T}"/net "${ED%/}"/usr/bin/net
+		rm -rf ${ED%/}/lib*/security
+		rm -rf ${ED%/}/usr/lib/systemd
+		rm -rf ${ED%/}/usr/lib*/perl*
+		rm -rf ${ED%/}/usr/lib*/python*
+		rm -rf ${ED%/}/var
+	fi
 }
 
 pkg_postinst() {
-	tmpfiles_process samba.conf
+	use minimal || tmpfiles_process samba.conf
 }