cargo-maelstrom uses cargo metadata to determine target directory

Also it now creates it if it doesn't exist

see issue #230

crates/cargo-maelstrom/src/lib.rs

@@ -20,6 +20,7 @@ use maelstrom_base::{ArtifactType, JobSpec, NonEmpty, Sha256Digest, Timeout};
 use maelstrom_client::{spec::ImageConfig, Client, ClientBgProcess};
 use maelstrom_util::{
  config::common::{BrokerAddr, CacheSize, InlineLimit, LogLevel, Slots},
+ fs::Fs,
  process::ExitCode,
 };
 use metadata::{AllMetadata, TestMetadata};
@@ -548,6 +549,7 @@ impl MainAppDeps {
  stderr_color: bool,
  workspace_root: &impl AsRef<Path>,
  workspace_packages: &[&CargoPackage],
+ target_directory: &impl AsRef<Path>,
  broker_addr: Option<BrokerAddr>,
  cache_size: CacheSize,
  inline_limit: InlineLimit,
@@ -557,6 +559,7 @@ impl MainAppDeps {
  manifest_options: ManifestOptions,
  logger: Logger,
  ) -> Result<Self> {
+ let fs = Fs::new();
  let logging_output = LoggingOutput::default();
  let log = logger.build(logging_output.clone());
  slog::debug!(
@@ -567,7 +570,8 @@ impl MainAppDeps {
  "broker_addr" => ?broker_addr
  );
 
- let cache_dir = workspace_root.as_ref().join("target");
+ let cache_dir = target_directory.as_ref().to_owned();
+ fs.create_dir_all(&cache_dir)?;
  let client = Client::new(
  bg_proc,
  broker_addr,

crates/cargo-maelstrom/src/main.rs

@@ -133,6 +133,7 @@ pub fn main() -> Result<ExitCode> {
  std::io::stderr().is_terminal(),
  &cargo_metadata.workspace_root,
  &cargo_metadata.workspace_packages(),
+ &cargo_metadata.target_directory,
  config.broker,
  config.cache_size,
  config.inline_limit,