Parse package.json manifest

crates/ring-js-project-parser/Cargo.toml

@@ -5,3 +5,5 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [dependencies]
+serde = { version = "^1.0", features = ["derive"] }
+serde_json = "^1.0"

crates/ring-js-project-parser/src/lib.rs

@@ -1,14 +1 @@
-pub fn add(left: usize, right: usize) -> usize {
-    left + right
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
-}
+pub mod manifest;

crates/ring-js-project-parser/src/manifest/mod.rs

@@ -0,0 +1,32 @@
+use std::collections::HashMap;
+use std::io;
+use std::fs::File;
+use serde::Deserialize;
+
+#[derive(Debug, Deserialize)]
+pub struct PackageManifest {
+    pub name: String,
+    pub version: String,
+    #[serde(default)]
+    pub workspaces: Vec<String>,
+    #[serde(default)]
+    pub scripts: HashMap<String, String>,
+    #[serde(default)]
+    pub dependencies: HashMap<String, String>,
+    #[serde(default, rename = "devDependencies")]
+    pub dev_dependencies: HashMap<String, String>,
+}
+
+pub enum Error {
+    Io(io::Error),
+    Parse(serde_json::Error)
+}
+
+impl PackageManifest {
+    pub fn parse_file(path: &str) -> Result<PackageManifest, Error> {
+        let file = File::open(path).map_err(Error::Io)?;
+        let manifest = serde_json::from_reader(&file).map_err(Error::Parse)?;
+
+        Ok(manifest)
+    }
+}