twoliter: conditionally compile pubsys

While we do not publish twoliter without pubsys support built in, it can
speed up development compile times to avoid needing to compile pubsys
(which subsequently compiles the AWS SDK for Rust.)

twoliter/Cargo.toml

@@ -43,7 +43,7 @@ which.workspace = true
 # Binary dependencies. These are binaries that we want to embed in the Twoliter binary
 buildsys = { workspace = true }
 pipesys = { workspace = true }
-pubsys = { workspace = true }
+pubsys = { workspace = true, optional = true }
 pubsys-setup = { workspace = true }
 testsys = { workspace = true }
 tuftool = { workspace = true }
@@ -58,5 +58,6 @@ tar.workspace = true
 test-case.workspace = true
 
 [features]
-default = ["integ-tests"]
+default = ["integ-tests", "pubsys"]
 integ-tests = []
+pubsys = ["dep:pubsys"]

twoliter/src/tools.rs

@@ -12,6 +12,7 @@ use tracing::debug;
 const TAR_GZ_DATA: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/tools.tar.gz"));
 const BUILDSYS: &[u8] = include_bytes!(env!("CARGO_BIN_FILE_BUILDSYS"));
 const PIPESYS: &[u8] = include_bytes!(env!("CARGO_BIN_FILE_PIPESYS"));
+#[cfg(feature = "pubsys")]
 const PUBSYS: &[u8] = include_bytes!(env!("CARGO_BIN_FILE_PUBSYS"));
 const PUBSYS_SETUP: &[u8] = include_bytes!(env!("CARGO_BIN_FILE_PUBSYS_SETUP"));
 const TESTSYS: &[u8] = include_bytes!(env!("CARGO_BIN_FILE_TESTSYS"));
@@ -44,6 +45,7 @@ pub(crate) async fn install_tools(tools_dir: impl AsRef<Path>) -> Result<()> {
 
     write_bin("buildsys", BUILDSYS, &dir, mtime).await?;
     write_bin("pipesys", PIPESYS, &dir, mtime).await?;
+    #[cfg(feature = "pubsys")]
     write_bin("pubsys", PUBSYS, &dir, mtime).await?;
     write_bin("pubsys-setup", PUBSYS_SETUP, &dir, mtime).await?;
     write_bin("testsys", TESTSYS, &dir, mtime).await?;