Add files

.gitignore

@@ -12,3 +12,8 @@ Cargo.lock
 
 # MSVC Windows builds of rustc generate these, which store debugging information
 *.pdb
+
+
+# Added by cargo
+
+/target

Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "npmrun"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+serde = { version = "1.0.204", features = ["derive"] }
+serde_json = "1.0.120"

src/main.rs

@@ -0,0 +1,61 @@
+use std::env;
+use std::fs::File;
+use std::io::BufReader;
+use serde::{Deserialize};
+
+#[derive(Debug, Deserialize)]
+struct PackageJson {
+    scripts: Scripts,
+}
+
+type Scripts = std::collections::HashMap<String, String>;
+
+fn exec(command: &str) {
+    println!("   > EXEC: {}", command);
+
+    use std::process::Command;
+    let mut parts = command.split_whitespace();
+    let command = parts.next().unwrap();
+    let args = parts;
+    let status = Command::new(command)
+        .args(args)
+        .status()
+        .expect("Failed to execute command");
+    if !status.success() {
+        eprintln!("Command failed with exit code: {}", status);
+        std::process::exit(1);
+    }
+}
+
+// コマンドを&&でつないで実行する
+fn exec_commands(commands: &str) {
+    println!("Running commands: {}", commands);
+
+    for command in commands.split("&&") {
+        exec(command.trim());
+    }
+}
+
+fn main() {
+    const FILENAME: &str = "package.json";
+
+    // ファイルを開いてJSONをパースする
+    let file = File::open(FILENAME).expect("Failed to open file");
+    let reader = BufReader::new(file);
+    let package_json: PackageJson = serde_json::from_reader(reader).expect("Failed to parse JSON");
+
+    // コマンドライン引数から指定されたスクリプト名を取得
+    let args: Vec<String> = env::args().collect();
+    if args.len() < 2 {
+        eprintln!("Usage: {} <filename>", args[0]);
+        std::process::exit(1);
+    }
+
+    let script_name = &args[1]; // 第2引数をスクリプト名とする
+
+    // スクリプトを実行
+    match package_json.scripts.get(script_name) {
+        Some(script) => exec_commands(script),
+        None => std::process::exit(1),
+    }
+}