Add bin

Cargo.toml

@@ -9,12 +9,20 @@ readme = "README.md"
 keywords = ["openapi"]
 categories = ["web-programming::http-server"]
 
+[[bin]]
+name = "openapi-linter"
+path = "src/main.rs"
+required-features = ["serde_json", "serde_yaml"]
+doc = false
+
 [dependencies]
-heck = "0.4.0"
+heck = "0.5.0"
 indexmap = "2.0.0"
 lazy_static = "1.4.0"
 openapiv3 = "2.0.0-rc.1"
 regex = "1.7.3"
+serde_json = { version = "1.0", optional = true }
+serde_yaml = { version = "0.9", optional = true }
 
 [dev-dependencies]
 expectorate = "1.0"

src/main.rs

@@ -0,0 +1,37 @@
+use std::{env, fs::File, path::Path, process};
+
+use openapiv3::OpenAPI;
+
+fn main() {
+    let args: Vec<_> = env::args().collect();
+    if args.len() != 2 {
+        println!("usage: openapi-linter filename");
+    }
+    let filename = &args[1];
+
+    //let content = fs::read_to_string(filename).expect("Unable to read file");
+
+    // Make sure the result parses as a valid OpenAPI spec.
+    let spec = load_api(&filename);
+
+    // Check for lint errors.
+    let errors = openapi_lint::validate(&spec);
+    if !errors.is_empty() {
+        eprintln!("{}", errors.join("\n\n"));
+        process::exit(1);
+    }
+}
+
+fn load_api<P>(path: P) -> OpenAPI
+where
+    P: AsRef<Path> + std::clone::Clone + std::fmt::Debug,
+{
+    let mut file = File::open(path.clone()).unwrap();
+    match serde_json::from_reader(file) {
+        Ok(json_value) => json_value,
+        _ => {
+            file = File::open(path.clone()).unwrap();
+            serde_yaml::from_reader(file).expect("file was not valid OpenAPI")
+        }
+    }
+}