feat: build tests in release profile, limit build workers

codegen/Cargo.toml

@@ -2,7 +2,7 @@
 name = "shuttle-codegen"
 version = "0.7.2"
 edition.workspace = true
-licence.workspace = true
+license.workspace = true
 description = "Proc-macro code generator for the shuttle.rs service"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

common/Cargo.toml

@@ -2,7 +2,7 @@
 name = "shuttle-common"
 version.workspace = true
 edition.workspace = true
-licence.workspace = true
+license.workspace = true
 description = "Common library for the shuttle platform (https://www.shuttle.rs/)"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

deployer/src/deployment/queue.rs

@@ -4,6 +4,7 @@ use super::{Built, QueueReceiver, RunSender, State};
 use crate::error::{Error, Result, TestError};
 use crate::persistence::{LogLevel, SecretRecorder};
 
+use cargo::util::interning::InternedString;
 use cargo_metadata::Message;
 use chrono::Utc;
 use crossbeam_channel::Sender;
@@ -312,6 +313,14 @@ async fn run_pre_deploy_tests(
         ansi: false,
     };
 
+    // We set the tests to build with the release profile since deployments compile
+    // with the release profile by default. This means crates don't need to be
+    // recompiled in debug mode for the tests, reducing memory usage during deployment.
+    compile_opts.build_config.requested_profile = InternedString::new("release");
+
+    // Build tests with a maximum of 8 workers.
+    compile_opts.build_config.jobs = 8;
+
     let opts = TestOptions {
         compile_opts,
         no_run: false,

service/src/loader.rs

@@ -178,6 +178,12 @@ fn get_compile_options(config: &Config, release_mode: bool) -> anyhow::Result<Co
         InternedString::new("dev")
     };
 
+    // This sets the max workers for cargo build to 8 for release mode (aka deployment),
+    // but leaves it as default (num cpus) for local runs
+    if release_mode {
+        opts.build_config.jobs = 8
+    };
+
     Ok(opts)
 }