compsvc: Remove local binder support

Bug: 190851176
Test: atest ComposHostTestCases
Change-Id: I75e39ce4d44bb2188a4fe000a2a30b5a55e1ab8d
diff --git a/compos/src/compsvc_main.rs b/compos/src/compsvc_main.rs
index 6396556..46c8f8c 100644
--- a/compos/src/compsvc_main.rs
+++ b/compos/src/compsvc_main.rs
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-//! A tool to start a standalone compsvc server, either in the host using Binder or in a VM using
-//! RPC binder over vsock.
+//! A tool to start a standalone compsvc server that serves over RPC binder.
 
 mod common;
 mod compilation;
@@ -24,55 +23,30 @@
 mod fsverity;
 mod signer;
 
-use crate::common::{SERVICE_NAME, VSOCK_PORT};
-use anyhow::{bail, Context, Result};
+use crate::common::VSOCK_PORT;
+use anyhow::{bail, Result};
 use binder::unstable_api::AsNative;
-use compos_aidl_interface::binder::{add_service, ProcessState};
 use log::debug;
 
-struct Config {
-    rpc_binder: bool,
-}
-
-fn parse_args() -> Result<Config> {
-    #[rustfmt::skip]
-    let matches = clap::App::new("compsvc")
-        .arg(clap::Arg::with_name("rpc_binder")
-             .long("rpc-binder"))
-        .get_matches();
-
-    Ok(Config { rpc_binder: matches.is_present("rpc_binder") })
-}
-
 fn main() -> Result<()> {
     android_logger::init_once(
         android_logger::Config::default().with_tag("compsvc").with_min_level(log::Level::Debug),
     );
 
-    let config = parse_args()?;
-    let mut service = compsvc::new_binder(config.rpc_binder)?.as_binder();
-    if config.rpc_binder {
-        debug!("compsvc is starting as a rpc service.");
-        // SAFETY: Service ownership is transferring to the server and won't be valid afterward.
-        // Plus the binder objects are threadsafe.
-        let retval = unsafe {
-            binder_rpc_unstable_bindgen::RunRpcServer(
-                service.as_native_mut() as *mut binder_rpc_unstable_bindgen::AIBinder,
-                VSOCK_PORT,
-            )
-        };
-        if retval {
-            debug!("RPC server has shut down gracefully");
-            Ok(())
-        } else {
-            bail!("Premature termination of RPC server");
-        }
+    let mut service = compsvc::new_binder()?.as_binder();
+    debug!("compsvc is starting as a rpc service.");
+    // SAFETY: Service ownership is transferring to the server and won't be valid afterward.
+    // Plus the binder objects are threadsafe.
+    let retval = unsafe {
+        binder_rpc_unstable_bindgen::RunRpcServer(
+            service.as_native_mut() as *mut binder_rpc_unstable_bindgen::AIBinder,
+            VSOCK_PORT,
+        )
+    };
+    if retval {
+        debug!("RPC server has shut down gracefully");
+        Ok(())
     } else {
-        ProcessState::start_thread_pool();
-        debug!("compsvc is starting as a local service.");
-        add_service(SERVICE_NAME, service)
-            .with_context(|| format!("Failed to register service {}", SERVICE_NAME))?;
-        ProcessState::join_thread_pool();
-        bail!("Unexpected exit after join_thread_pool")
+        bail!("Premature termination of RPC server");
     }
 }