ci: enable Rust for breaking-changes jobs

Enable Rust for our breaking-changes jobs so that we can verify that the
build infrastructure and the converted Rust subsystems work as expected.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/ci/install-dependencies.sh b/ci/install-dependencies.sh
index 35bd05b..0d3aa49 100755
--- a/ci/install-dependencies.sh
+++ b/ci/install-dependencies.sh
@@ -35,7 +35,7 @@
 		MESON_DEPS="meson ninja";;
 	esac
 	dnf -yq update >/dev/null &&
-	dnf -yq install shadow-utils sudo make pkg-config gcc findutils diffutils perl python3 gawk gettext zlib-devel expat-devel openssl-devel curl-devel pcre2-devel $MESON_DEPS >/dev/null
+	dnf -yq install shadow-utils sudo make pkg-config gcc findutils diffutils perl python3 gawk gettext zlib-devel expat-devel openssl-devel curl-devel pcre2-devel $MESON_DEPS cargo >/dev/null
 	;;
 ubuntu-*|i386/ubuntu-*|debian-*)
 	# Required so that apt doesn't wait for user input on certain packages.
@@ -62,7 +62,7 @@
 		make libssl-dev libcurl4-openssl-dev libexpat-dev wget sudo default-jre \
 		tcl tk gettext zlib1g-dev perl-modules liberror-perl libauthen-sasl-perl \
 		libemail-valid-perl libio-pty-perl libio-socket-ssl-perl libnet-smtp-ssl-perl libdbd-sqlite3-perl libcgi-pm-perl \
-		libsecret-1-dev libpcre2-dev meson ninja-build pkg-config \
+		libsecret-1-dev libpcre2-dev meson ninja-build pkg-config cargo \
 		${CC_PACKAGE:-${CC:-gcc}} $PYTHON_PACKAGE
 
 	case "$distro" in
diff --git a/ci/run-build-and-tests.sh b/ci/run-build-and-tests.sh
index 3680446..c718bd1 100755
--- a/ci/run-build-and-tests.sh
+++ b/ci/run-build-and-tests.sh
@@ -9,7 +9,9 @@
 fedora-breaking-changes-musl|linux-breaking-changes)
 	export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 	export WITH_BREAKING_CHANGES=YesPlease
+	export WITH_RUST=YesPlease
 	MESONFLAGS="$MESONFLAGS -Dbreaking_changes=true"
+	MESONFLAGS="$MESONFLAGS -Drust=enabled"
 	;;
 linux-TEST-vars)
 	export OPENSSL_SHA1_UNSAFE=YesPlease