Use exitcodes instead of exit method in tq binary entrypoint (#14)

* Use `std::process::ExitCode` rather than `std::process::exit` in `tq` binary `main` function
* Reformat `serde` dependency in `Cargo.toml`

Cargo.toml

@@ -15,19 +15,22 @@ toml = "0.8"
 clap = { version = "4.5", features = ["derive", "usage", "help"] }
 thiserror = "1.0.61"
 colored = { version = "2.1.0", optional = true }
-serde_json = { version = "1.0.120", features = [
+
+[dependencies.serde_json] 
+version = "1.0.120"
+features = [
     "indexmap",
     "preserve_order",
     "raw_value",
     "unbounded_depth",
-], optional = true }
+]
+optional = true
 
 [features]
 default = ["json"]
 color = ["colored"]
 json = ["dep:serde_json"]
 
-
 [lib]
 name = "tq"
 path = "src/lib.rs"
@@ -36,12 +39,10 @@ doctest = false
 
 [[bin]]
 name = "tq"
-path = "src/main.rs"
 test = false
 
 [[bin]]
 name = "tomlq"
-path = "src/legacy.rs"
 test = false
 
 [package.metadata.binstall]

src/legacy.rs → src/bin/tomlq.rs

@@ -1,3 +1,5 @@
+//! Legacy tomlq binary.
+
 use clap::Parser;
 #[cfg(feature = "color")]
 use colored::Colorize;

src/main.rs → src/bin/tq.rs

@@ -1,33 +1,33 @@
 use clap::Parser;
-use std::process::exit;
+use std::process::ExitCode;
 use tq::OutputType;
 
-fn main() {
+fn main() -> ExitCode {
     let app = tq::Cli::parse();
 
     let toml_file = tq::load_toml_from_file(&app.file);
 
     let Ok(toml_file) = toml_file else {
         let e = toml_file.unwrap_err();
         eprintln!("{}", e);
-        exit(-1);
+        return ExitCode::FAILURE;
     };
 
     let x = tq::extract_pattern(&toml_file, &app.pattern);
 
-    exit(match x {
+    match x {
         Ok(needle) => {
             match app.output {
                 OutputType::Toml => println!("{}", format!("{}", needle).trim_matches('"')),
                 #[cfg(feature = "json")]
                 OutputType::Json => println!("{}", serde_json::to_string(&needle).unwrap()),
             }
 
-            0
+            ExitCode::SUCCESS
         }
         Err(e) => {
             eprintln!("{}", e);
-            -1
+            ExitCode::FAILURE
         }
-    });
+    }
 }