Self-hosted implementation of cargo-cp-artifact:

- Core functionality implemented in crates/cargo-cp-artifact as a regular crate
- crates/cargo-cp-artifact also has a bin so it can be used to build the self-hosted JS package
- pkgs/cargo-cp-artifact has a Neon implementation that depends on crates/cargo-cp-artifact
- pkgs/cargo-cp-artifact/package.json uses `cargo run -p cargo-cp-artifact` to build itself from the monorepo

Cargo.toml

@@ -2,4 +2,5 @@
 members = [
     "crates/*",
     "test/*",
+    "pkgs/cargo-cp-artifact",
 ]

crates/cargo-cp-artifact/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "cargo-cp-artifact"
+version = "0.2.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[[bin]]
+name = "cargo-cp-artifact"
+path = "src/bin.rs"
+
+[dependencies]
+cargo_metadata = "0.15.3"

crates/cargo-cp-artifact/src/artifact.rs

@@ -0,0 +1,23 @@
+#[derive(Debug, PartialEq, Eq, Hash)]
+pub enum ArtifactKind {
+    Bin,
+    CDylib,
+    Dylib,
+}
+
+impl ArtifactKind {
+    pub fn parse(str: &impl AsRef<str>) -> Option<Self> {
+        match str.as_ref() {
+            "bin" => Some(ArtifactKind::Bin),
+            "cdylib" => Some(ArtifactKind::CDylib),
+            "dylib" => Some(ArtifactKind::Dylib),
+            _ => None,
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Eq, Hash)]
+pub struct Artifact {
+    pub kind: ArtifactKind,
+    pub crate_name: String,
+}

crates/cargo-cp-artifact/src/bin.rs

@@ -0,0 +1,12 @@
+mod artifact;
+mod cargo;
+mod cli;
+
+use cargo::Status;
+
+fn main() {
+    // Skip the native binary name (argv[0]).
+    if let Status::Failure = cli::run(1) {
+        std::process::exit(1);
+    }
+}