Concise result handling.

src/main.rs

@@ -1,25 +1,22 @@
+use std::{env, fs, process};
+
 fn main() {
  // Get the schema file from the command line arguments or use the default.
  let default_schema_file = "schema.graphql".to_string();
- let schema_file = &std::env::args().nth(1).unwrap_or(default_schema_file);
- println!("schema_file: {}", schema_file);
+ let schema_file = &env::args().nth(1).unwrap_or(default_schema_file);
+ dbg!("schema_file: {}", schema_file);
 
  // Read the schema file and parse it into a schema object.
- let result = std::fs::read_to_string(schema_file);
- if result.is_err() {
- println!("Error reading schema file: {}", result.err().unwrap());
- std::process::exit(error_codes::ERROR_SCHEMA_FILE_INVALID);
- }
-
- let schema_file = result.unwrap();
- let result = minigraf::parse_schema(&schema_file);
- if result.is_err() {
- println!("Error parsing schema file: {}", result.err().unwrap());
- std::process::exit(minigraf::error_codes::ERROR_SCHEMA_INVALID);
- }
+ let schema_file = fs::read_to_string(schema_file).unwrap_or_else(|err| {
+ eprintln!("Error reading schema file: {}", err);
+ process::exit(error_codes::ERROR_SCHEMA_FILE_INVALID);
+ });
 
- let schema = result.unwrap();
- println!("schema: {:#?}", schema);
+ let schema = minigraf::parse_schema(&schema_file).unwrap_or_else(|err| {
+ eprintln!("Error parsing schema file: {}", err);
+ process::exit(minigraf::error_codes::ERROR_SCHEMA_INVALID);
+ });
+ dbg!("schema: {:#?}", schema);
 }
 
 mod error_codes {