add support for json output

Cargo.toml

@@ -15,10 +15,17 @@ 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 = [
+    "indexmap",
+    "preserve_order",
+    "raw_value",
+    "unbounded_depth",
+], optional = true }
 
 [features]
-default = []
+default = ["json"]
 color = ["colored"]
+json = ["dep:serde_json"]
 
 
 [lib]

src/legacy.rs

@@ -1,6 +1,7 @@
 use clap::Parser;
 use colored::Colorize;
 use std::process::exit;
+use tq::OutputType;
 
 fn main() {
     eprintln!(
@@ -9,7 +10,7 @@ fn main() {
     );
     eprintln!(
         "{}",
-        "The \"tomlq\" binary will be removed from this package starting in version 0.2.0".yellow()
+        "The \"tomlq\" binary will be removed from this package starting in version 0.2.0, scheduled for January 1, 2025".yellow()
     );
 
     let app = tq::Cli::parse();
@@ -26,7 +27,10 @@ fn main() {
 
     exit(match x {
         Ok(needle) => {
-            println!("{}", format!("{}", needle).trim_matches('"'));
+            match app.output {
+                OutputType::Toml => println!("{}", format!("{}", needle).trim_matches('"')),
+                OutputType::Json => println!("{}", serde_json::to_string(&needle).unwrap()),
+            }
             0
         }
         Err(e) => {

src/lib.rs

@@ -19,6 +19,14 @@ pub enum TqError {
     PatternNotFoundError { pattern: String },
 }
 
+#[derive(Default, Debug, Clone, clap::ValueEnum)]
+pub enum OutputType {
+    #[default]
+    Toml,
+    #[cfg(feature = "json")]
+    Json,
+}
+
 #[derive(Parser, Debug)]
 #[command(author, version, about, long_about = None)]
 pub struct Cli {
@@ -28,12 +36,19 @@ pub struct Cli {
 
     /// Field to read from the TOML file
     pub pattern: String,
-    // /// The TOML File URL to read
-    // #[arg(short, long, value_name = "URL_PATH")]
-    // pub url: String,
+
+    /// The output type. Default is TOML, but supports outputting in different formats.
+    #[arg(short, long, value_name = "OUTPUT_TYPE", default_value = "toml")]
+    pub output: OutputType,
 }
 
 pub fn extract_pattern<'a>(toml_file: &'a Value, pattern: &str) -> Result<&'a Value> {
+    if pattern.is_empty() || pattern == "." {
+        return Ok(toml_file);
+    }
+
+    let pattern = pattern.trim_start_matches('.');
+
     pattern
         .split('.')
         .fold(Some(toml_file), |acc, key| match acc {

src/main.rs

@@ -1,5 +1,6 @@
 use clap::Parser;
 use std::process::exit;
+use tq::OutputType;
 
 fn main() {
     let app = tq::Cli::parse();
@@ -16,7 +17,11 @@ fn main() {
 
     exit(match x {
         Ok(needle) => {
-            println!("{}", format!("{}", needle).trim_matches('"'));
+            match app.output {
+                OutputType::Toml => println!("{}", format!("{}", needle).trim_matches('"')),
+                OutputType::Json => println!("{}", serde_json::to_string(&needle).unwrap()),
+            }
+
             0
         }
         Err(e) => {