Automatically rebuild a rust file when running qemu.

.gitignore

@@ -4,7 +4,7 @@ __pycache__/
 compile_commands.json
 
 sysroot/bin
-sysroot/usr/bin
+sysroot/usr
 
 rust/target
 yunq/venv

scripts/qemu.sh

@@ -12,6 +12,13 @@ pushd $BUILD_DIR
 ninja 
 ninja install
 
+export CARGO_INSTALL_ROOT="${DIR}/../sysroot/usr/"
+
+# Need to pushd so rustup gets the toolchain from rust/rust_toolchain.toml
+pushd "${DIR}/../rust"
+cargo install --force --path "${DIR}/../rust/usr/testbed/"
+popd
+
 sudo sh ${DIR}/build_image.sh disk.img
 
 QEMU_ARGS=