Convert all of the launcher crates to use prost.

Makefile

@@ -177,7 +177,7 @@ $(foreach component,$(ALL),$(eval $(call BUILD,$(component))))
 
 define UNIT
 unit-$1: image ## executes the $1 component's unit test suite
-	$(run) sh -c 'cd components/$1 && TESTING_FS_ROOT=$(TESTING_FS_ROOT) cargo test $(CARGO_FLAGS)'
+	$(run) sh -c 'cd components/$1 && TESTING_FS_ROOT=$(TESTING_FS_ROOT) cargo test $(CARGO_FLAGS) -- --test-threads=1'
 .PHONY: unit-$1
 endef
 $(foreach component,$(ALL),$(eval $(call UNIT,$(component))))
@@ -203,8 +203,7 @@ UNEXAMINED_LINTS = clippy::cyclomatic_complexity \
                    clippy::redundant_field_names \
                    clippy::too_many_arguments \
                    clippy::trivially_copy_pass_by_ref \
-                   clippy::wrong_self_convention \
-                   renamed_and_removed_lints
+                   clippy::wrong_self_convention
 
 # Lints we disagree with and choose to keep in our code with no warning
 ALLOWED_LINTS =
@@ -260,7 +259,8 @@ DENIED_LINTS = clippy::assign_op_pattern \
                clippy::useless_format \
                clippy::useless_let_if_seq \
                clippy::useless_vec \
-               clippy::write_with_newline
+               clippy::write_with_newline \
+               renamed_and_removed_lints
 
 lint: image ## executes the $1 component's linter checks
 	$(run) cargo clippy --all-targets --tests $(CARGO_FLAGS) -- \

components/launcher-client/Cargo.toml

@@ -3,6 +3,7 @@ name = "habitat-launcher-client"
 version = "0.0.0"
 edition = "2018"
 authors = ["Jamie Winsor <reset@habitat.sh>"]
+workspace = "../../"
 
 [dependencies]
 bincode = "*"
@@ -12,5 +13,5 @@ habitat-launcher-protocol = { path = "../launcher-protocol" }
 ipc-channel = { git = "https://github.com/habitat-sh/ipc-channel", branch = "hbt-windows" }
 libc = "*"
 log = "*"
-protobuf = "1.5.1"
+prost = "*"
 serde = "*"

components/launcher-client/src/client.rs

@@ -12,17 +12,13 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use std::collections::HashMap;
-use std::fs;
-use std::io;
-use std::path::Path;
-
-use crate::core::os::process::Pid;
-use crate::protocol;
+use crate::{
+    core::os::process::Pid,
+    error::{Error, Result},
+    protocol::{self, Error as ProtocolError},
+};
 use ipc_channel::ipc::{IpcOneShotServer, IpcReceiver, IpcSender};
-use protobuf;
-
-use crate::error::{Error, Result};
+use std::{collections::HashMap, fs, io, path::Path};
 
 type Env = HashMap<String, String>;
 type IpcServer = IpcOneShotServer<Vec<u8>>;
@@ -49,38 +45,36 @@ impl LauncherCli {
         let tx = IpcSender::connect(pipe_to_launcher).map_err(Error::Connect)?;
         let (ipc_srv, pipe_to_sup) = IpcServer::new().map_err(Error::BadPipe)?;
         debug!("IpcServer::new() returned pipe_to_sup: {}", pipe_to_sup);
-        let mut cmd = protocol::Register::new();
-        cmd.set_pipe(pipe_to_sup);
+        let mut cmd = protocol::Register::default();
+        cmd.pipe = pipe_to_sup.clone();
         Self::send(&tx, &cmd)?;
         let (rx, raw) = ipc_srv.accept().map_err(|_| Error::AcceptConn)?;
         Self::read::<protocol::NetOk>(&raw)?;
         Ok(LauncherCli {
             tx: tx,
             rx: rx,
-            pipe: cmd.take_pipe(),
+            pipe: pipe_to_sup,
         })
     }
 
     /// Read a launcher protocol message from a byte array
     fn read<T>(bytes: &[u8]) -> Result<T>
     where
-        T: protobuf::MessageStatic,
+        T: protocol::LauncherMessage,
     {
-        let txn = protocol::NetTxn::from_bytes(bytes).map_err(Error::Deserialize)?;
+        let txn = protocol::NetTxn::from_bytes(bytes)?;
         if txn.message_id() == "NetErr" {
-            let err = txn
-                .decode::<protocol::NetErr>()
-                .map_err(Error::Deserialize)?;
-            return Err(Error::Protocol(err));
+            let err = txn.decode::<protocol::NetErr>()?;
+            return Err(Error::Protocol(ProtocolError::NetErr(err)));
         }
-        let msg = txn.decode::<T>().map_err(Error::Deserialize)?;
+        let msg = txn.decode::<T>()?;
         Ok(msg)
     }
 
     /// Receive and read protocol message from an IpcReceiver
     fn recv<T>(rx: &IpcReceiver<Vec<u8>>) -> Result<T>
     where
-        T: protobuf::MessageStatic,
+        T: protocol::LauncherMessage,
     {
         match rx.recv() {
             Ok(bytes) => Self::read(&bytes),
@@ -91,18 +85,18 @@ impl LauncherCli {
     /// Send a command to a Launcher
     fn send<T>(tx: &IpcSender<Vec<u8>>, message: &T) -> Result<()>
     where
-        T: protobuf::MessageStatic,
+        T: protocol::LauncherMessage,
     {
-        let txn = protocol::NetTxn::build(message).map_err(Error::Serialize)?;
-        let bytes = txn.to_bytes().map_err(Error::Serialize)?;
+        let txn = protocol::NetTxn::build(message)?;
+        let bytes = txn.to_bytes()?;
         tx.send(bytes).map_err(Error::Send)?;
         Ok(())
     }
 
     /// Receive and read protocol message from an IpcReceiver
     fn try_recv<T>(rx: &IpcReceiver<Vec<u8>>) -> Result<Option<T>>
     where
-        T: protobuf::MessageStatic,
+        T: protocol::LauncherMessage,
     {
         match rx.try_recv().map_err(|err| Error::from(*err)) {
             Ok(bytes) => {
@@ -124,11 +118,11 @@ impl LauncherCli {
 
     /// Restart a running process with the same arguments
     pub fn restart(&self, pid: Pid) -> Result<Pid> {
-        let mut msg = protocol::Restart::new();
-        msg.set_pid(pid.into());
+        let mut msg = protocol::Restart::default();
+        msg.pid = pid.into();
         Self::send(&self.tx, &msg)?;
         let reply = Self::recv::<protocol::SpawnOk>(&self.rx)?;
-        Ok(reply.get_pid() as Pid)
+        Ok(reply.pid as Pid)
     }
 
     /// Send a process spawn command to the connected Launcher
@@ -154,8 +148,8 @@ impl LauncherCli {
         G: ToString,
         P: ToString,
     {
-        let mut msg = protocol::Spawn::new();
-        msg.set_binary(bin.as_ref().to_path_buf().to_string_lossy().into_owned());
+        let mut msg = protocol::Spawn::default();
+        msg.binary = bin.as_ref().to_path_buf().to_string_lossy().into_owned();
 
         // On Windows, we only expect user to be Some.
         //
@@ -164,34 +158,35 @@ impl LauncherCli {
         // used; names are only for backward compatibility with older
         // Launchers.
         if let Some(name) = user {
-            msg.set_svc_user(name.to_string());
+            msg.svc_user = Some(name.to_string());
         }
         if let Some(name) = group {
-            msg.set_svc_group(name.to_string());
+            msg.svc_group = Some(name.to_string());
         }
         if let Some(uid) = user_id {
-            msg.set_svc_user_id(uid);
+            msg.svc_user_id = Some(uid);
         }
         if let Some(gid) = group_id {
-            msg.set_svc_group_id(gid);
+            msg.svc_group_id = Some(gid);
         }
 
         // This is only for Windows
         if let Some(password) = password {
-            msg.set_svc_password(password.to_string());
+            msg.svc_password = Some(password.to_string());
         }
-        msg.set_env(env);
-        msg.set_id(id.to_string());
+
+        msg.env = env;
+        msg.id = id.to_string();
         Self::send(&self.tx, &msg)?;
         let reply = Self::recv::<protocol::SpawnOk>(&self.rx)?;
-        Ok(reply.get_pid() as Pid)
+        Ok(reply.pid as Pid)
     }
 
     pub fn terminate(&self, pid: Pid) -> Result<i32> {
-        let mut msg = protocol::Terminate::new();
-        msg.set_pid(pid.into());
+        let mut msg = protocol::Terminate::default();
+        msg.pid = pid.into();
         Self::send(&self.tx, &msg)?;
         let reply = Self::recv::<protocol::TerminateOk>(&self.rx)?;
-        Ok(reply.get_exit_code())
+        Ok(reply.exit_code)
     }
 }

components/launcher-client/src/error.rs

@@ -12,26 +12,19 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use std::error;
-use std::fmt;
-use std::io;
-use std::result;
-
 use crate::protocol;
 use ipc_channel;
-use protobuf;
+use std::{error, fmt, io, result};
 
 #[derive(Debug)]
 pub enum Error {
     AcceptConn,
     BadPipe(io::Error),
     Connect(io::Error),
-    Deserialize(protobuf::ProtobufError),
     IPCBincode(String),
     IPCIO(io::ErrorKind),
-    Protocol(protocol::NetErr),
+    Protocol(protocol::Error),
     Send(ipc_channel::Error),
-    Serialize(protobuf::ProtobufError),
 }
 
 pub type Result<T> = result::Result<T, Error>;
@@ -42,16 +35,12 @@ impl fmt::Display for Error {
             Error::AcceptConn => "Unable to accept connection from Launcher".to_string(),
             Error::BadPipe(ref e) => format!("Unable to open pipe to Launcher, {}", e),
             Error::Connect(ref e) => format!("Unable to connect to Launcher's pipe, {}", e),
-            Error::Deserialize(ref e) => {
-                format!("Unable to deserialize message from Launcher, {}", e)
-            }
             Error::IPCBincode(ref e) => {
                 format!("Unable to read message frame from Launcher, {}", e)
             }
             Error::IPCIO(ref e) => format!("Unable to receive message from Launcher, {:?}", e),
             Error::Protocol(ref e) => format!("{}", e),
             Error::Send(ref e) => format!("Unable to send to Launcher's pipe, {}", e),
-            Error::Serialize(ref e) => format!("Unable to serialize message to Launcher, {}", e),
         };
         write!(f, "{}", msg)
     }
@@ -63,12 +52,10 @@ impl error::Error for Error {
             Error::AcceptConn => "Unable to accept connection from Launcher",
             Error::BadPipe(_) => "Unable to open pipe to Launcher",
             Error::Connect(_) => "Unable to connect to Launcher's pipe",
-            Error::Deserialize(_) => "Unable to deserialize message from Launcher",
             Error::IPCBincode(_) => "Unable to encode/decode message framing to/from Launcher",
             Error::IPCIO(_) => "Unable to receive message from Launcher",
             Error::Protocol(_) => "Received an error from Launcher",
             Error::Send(_) => "Unable to send to Launcher's pipe",
-            Error::Serialize(_) => "Unable to serialize message to Launcher",
         }
     }
 }
@@ -81,3 +68,9 @@ impl From<ipc_channel::ErrorKind> for Error {
         }
     }
 }
+
+impl From<protocol::Error> for Error {
+    fn from(err: protocol::Error) -> Error {
+        Error::Protocol(err)
+    }
+}

components/launcher-protocol/Cargo.toml

@@ -4,14 +4,14 @@ version = "0.0.0"
 edition = "2018"
 authors = ["Jamie Winsor <reset@habitat.sh>"]
 build = "build.rs"
+workspace = "../../"
 
 [dependencies]
-protobuf = "1.5.1"
+bytes = "*"
+prost = "*"
+prost-derive = "*"
 serde = "*"
 serde_derive = "*"
 
 [build-dependencies]
-pkg-config = "*"
-
-[features]
-protocols = []
+prost-build = "*"

components/launcher-protocol/build.rs

@@ -1,6 +1,23 @@
-// Inline common build protocols behavior
-include!("../libbuild-protocols.rs");
+use prost_build;
+
+/// Automatically generate Rust code from our protobuf definitions at
+/// compile time.
+///
+/// Generated code is deposited in `OUT_DIR` and automatically
+/// `include!`-ed in our Rust modules, per standard Prost practice.
 
 fn main() {
-    protocols::generate_if_feature_enabled();
+    let mut config = prost_build::Config::new();
+    config.type_attribute(".", "#[derive(Serialize, Deserialize)]");
+    config
+        .compile_protos(
+            &[
+                "protocols/error.proto",
+                "protocols/launcher.proto",
+                "protocols/net.proto",
+                "protocols/supervisor.proto",
+            ],
+            &["protocols/"],
+        )
+        .unwrap()
 }

components/launcher-protocol/protocols/error.proto

@@ -1,6 +1,6 @@
 syntax = "proto2";
 
-package error;
+package launcher.error;
 
 enum ErrCode {
   Unknown = 0;

components/launcher-protocol/protocols/launcher.proto

@@ -1,6 +1,6 @@
 syntax = "proto2";
 
-package launcher;
+package launcher.launcher;
 
 message Register {
   optional string pipe = 1;

components/launcher-protocol/protocols/net.proto

@@ -1,6 +1,6 @@
 syntax = "proto2";
 
-package net;
+package launcher.net;
 
 message Envelope {
   optional string message_id = 1;

components/launcher-protocol/protocols/supervisor.proto

@@ -1,5 +1,5 @@
 syntax = "proto2";
 
-package supervisor;
+package launcher.supervisor;
 
 message Shutdown {}