1 files changed, 142 insertions, 0 deletions
diff --git a/mling/src/proj_mgr/metadata.rs b/mling/src/proj_mgr/metadata.rs
new file mode 100644
index 0000000..c44ed46
--- /dev/null
+++ b/mling/src/proj_mgr/metadata.rs
@@ -0,0 +1,142 @@
+use serde::Deserialize;
+use serde::Serialize;
+
+use std::path::PathBuf;
+use std::process::Command;
+
+/// Read cargo metadata by running `cargo metadata` with the given manifest path.
+pub fn read_metadata(cargo_toml: PathBuf) -> Result<CargoLockFile, std::io::Error> {
+    let output = Command::new("cargo")
+        .arg("metadata")
+        .arg("--format-version")
+        .arg("1")
+        .arg("--manifest-path")
+        .arg(cargo_toml)
+        .output()?;
+
+    if !output.status.success() {
+        let stderr = String::from_utf8_lossy(&output.stderr);
+        return Err(std::io::Error::new(
+            std::io::ErrorKind::Other,
+            format!("cargo metadata failed: {}", stderr),
+        ));
+    }
+
+    let lock_file: CargoLockFile = serde_json::from_slice(&output.stdout)
+        .map_err(|e| std::io::Error::new(std::io::ErrorKind::InvalidData, e))?;
+
+    Ok(lock_file)
+}
+
+/// A cargo metadata lock file that serde can serialize and deserialize.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CargoLockFile {
+    pub packages: Vec<Package>,
+    #[serde(rename = "workspace_members")]
+    pub workspace_members: Vec<String>,
+    #[serde(rename = "workspace_default_members")]
+    pub workspace_default_members: Vec<String>,
+    pub resolve: Resolve,
+    #[serde(rename = "target_directory")]
+    pub target_directory: String,
+    #[serde(rename = "build_directory")]
+    pub build_directory: String,
+    pub version: u64,
+    #[serde(rename = "workspace_root")]
+    pub workspace_root: String,
+    pub metadata: Option<serde_json::Value>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Package {
+    pub name: String,
+    pub version: String,
+    pub id: String,
+    pub license: Option<String>,
+    #[serde(rename = "license_file")]
+    pub license_file: Option<String>,
+    pub description: Option<String>,
+    pub source: Option<String>,
+    pub dependencies: Vec<Dependency>,
+    pub targets: Vec<Target>,
+    pub features: std::collections::BTreeMap<String, Vec<String>>,
+    #[serde(rename = "manifest_path")]
+    pub manifest_path: String,
+    pub metadata: Option<serde_json::Value>,
+    pub publish: Option<serde_json::Value>,
+    pub authors: Vec<String>,
+    pub categories: Vec<String>,
+    pub keywords: Vec<String>,
+    pub readme: Option<String>,
+    pub repository: Option<String>,
+    pub homepage: Option<String>,
+    pub documentation: Option<String>,
+    pub edition: String,
+    pub links: Option<String>,
+    #[serde(rename = "default_run")]
+    pub default_run: Option<String>,
+    #[serde(rename = "rust_version")]
+    pub rust_version: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Dependency {
+    pub name: String,
+    pub source: Option<String>,
+    pub req: String,
+    pub kind: Option<String>,
+    pub rename: Option<String>,
+    pub optional: bool,
+    #[serde(rename = "uses_default_features")]
+    pub uses_default_features: bool,
+    pub features: Vec<String>,
+    pub target: Option<String>,
+    pub registry: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub path: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Target {
+    pub kind: Vec<String>,
+    #[serde(rename = "crate_types")]
+    pub crate_types: Vec<String>,
+    pub name: String,
+    #[serde(rename = "src_path")]
+    pub src_path: String,
+    pub edition: String,
+    pub doc: bool,
+    pub doctest: bool,
+    pub test: bool,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(rename = "required-features")]
+    pub required_features: Option<Vec<String>>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Resolve {
+    pub nodes: Vec<ResolveNode>,
+    pub root: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ResolveNode {
+    pub id: String,
+    pub dependencies: Vec<String>,
+    pub deps: Vec<DepInfo>,
+    pub features: Vec<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct DepInfo {
+    pub name: String,
+    pub pkg: String,
+    #[serde(rename = "dep_kinds")]
+    pub dep_kinds: Vec<DepKind>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct DepKind {
+    pub kind: Option<String>,
+    pub target: Option<String>,
+}