feat(deps): start laying out some types and functions

crates/project/src/deps.rs

@@ -0,0 +1,41 @@
+use std::path::Path;
+
+use crate::{
+    error::Error,
+    paths,
+    telemetry::{Event, EventListener},
+};
+
+use self::manifest::Manifest;
+
+pub mod manifest;
+
+pub enum UseManifest {
+    Yes,
+    No,
+}
+
+pub fn download<T>(
+    event_listener: &T,
+    new_package: Option<(Vec<String>, bool)>,
+    use_manifest: UseManifest,
+    root_path: &Path,
+) -> Result<Manifest, Error>
+where
+    T: EventListener,
+{
+    let build_path = root_path.join(paths::build());
+
+    let mut build_lock = fslock::LockFile::open(&build_path).expect("Build Lock Creation");
+
+    if !build_lock
+        .try_lock_with_pid()
+        .expect("Trying build locking")
+    {
+        event_listener.handle_event(Event::WaitingForBuildDirLock);
+
+        build_lock.lock_with_pid().expect("Build locking")
+    }
+
+    todo!()
+}

crates/project/src/deps/manifest.rs

@@ -0,0 +1,17 @@
+use std::collections::HashMap;
+
+pub struct Manifest {
+    pub requirements: HashMap<String, String>,
+    pub packages: Vec<Package>,
+}
+
+pub struct Package {
+    pub name: String,
+    pub version: String,
+    pub requirements: Vec<String>,
+    pub source: PackageSource,
+}
+
+pub enum PackageSource {
+    GitHub { url: String },
+}

crates/project/src/lib.rs

@@ -1,9 +1,11 @@
 pub mod config;
+pub mod deps;
 pub mod docs;
 pub mod error;
 pub mod format;
 pub mod module;
 pub mod options;
+pub mod paths;
 pub mod pretty;
 pub mod script;
 pub mod telemetry;
@@ -17,6 +19,7 @@ use aiken_lang::{
     uplc::CodeGenerator,
     IdGenerator,
 };
+use deps::UseManifest;
 use miette::NamedSource;
 use options::{CodeGenMode, Options};
 use pallas::{
@@ -148,6 +151,8 @@ where
     }
 
     pub fn compile(&mut self, options: Options) -> Result<(), Error> {
+        let manifest = deps::download(&self.event_listener, None, UseManifest::Yes, &self.root)?;
+
         self.event_listener
             .handle_event(Event::StartingCompilation {
                 root: self.root.clone(),
@@ -718,7 +723,7 @@ where
 
             let cbor_hex = hex::encode(&cbor);
 
-            fs::write(script_path, &cbor_hex)?;
+            fs::write(script_path, cbor_hex)?;
 
             // Create the payment script JSON file
             let payment_script_path = script_output_dir.join("payment_script.json");

crates/project/src/paths.rs

@@ -0,0 +1,5 @@
+use std::path::PathBuf;
+
+pub fn build() -> PathBuf {
+    PathBuf::from("build")
+}

crates/project/src/telemetry.rs

@@ -35,4 +35,5 @@ pub enum Event {
     FinishedTests {
         tests: Vec<EvalInfo>,
     },
+    WaitingForBuildDirLock,
 }