Add an option to dump pretty json files

src/main.rs

@@ -28,6 +28,7 @@ struct Config {
     function: bool,
     metrics: bool,
     output: String,
+    pretty: bool,
     line_start: Option<usize>,
     line_end: Option<usize>,
     preproc_lock: Option<Arc<Mutex<PreprocResults>>>,
@@ -80,6 +81,7 @@ fn act_on_file(language: Option<LANG>, path: PathBuf, cfg: Config) -> std::io::R
     } else if cfg.metrics {
         let cfg = MetricsCfg {
             path,
+            pretty: cfg.pretty,
             output_path: if cfg.output.is_empty() {
                 None
             } else {
@@ -309,6 +311,11 @@ fn main() {
                 .default_value("")
                 .takes_value(true),
         )
+        .arg(
+            Arg::with_name("pretty")
+                .help("Dump a pretty json file")
+                .long("pr"),
+        )
         .arg(
             Arg::with_name("output")
                 .help("Output file/directory")
@@ -430,6 +437,7 @@ fn main() {
         (None, None)
     };
 
+    let pretty = matches.is_present("pretty");
     let output = matches.value_of("output").unwrap().to_string();
     let output_is_dir = PathBuf::from(output.clone()).is_dir();
     if metrics && !output.is_empty() && !output_is_dir {
@@ -468,6 +476,7 @@ fn main() {
         count_filter,
         function,
         metrics,
+        pretty,
         output: output.clone(),
         line_start,
         line_end,

src/metrics.rs

@@ -351,8 +351,17 @@ impl<'a> FuncSpace<'a> {
         writeln!(stdout, "{}", val)
     }
 
-    fn dump_json(&self, path: &PathBuf, output_path: &PathBuf) -> std::io::Result<()> {
-        let json_data = serde_json::to_string_pretty(&self).unwrap();
+    fn dump_json(
+        &self,
+        path: &PathBuf,
+        output_path: &PathBuf,
+        pretty: bool,
+    ) -> std::io::Result<()> {
+        let json_data = if pretty {
+            serde_json::to_string_pretty(&self).unwrap()
+        } else {
+            serde_json::to_string(&self).unwrap()
+        };
 
         let mut file = path.as_path().file_name().unwrap().to_os_string();
         file.push(".json");
@@ -453,6 +462,7 @@ pub fn metrics<'a, T: TSParserTrait>(parser: &'a T, path: &'a PathBuf) -> Option
 
 pub struct MetricsCfg {
     pub path: PathBuf,
+    pub pretty: bool,
     pub output_path: Option<PathBuf>,
 }
 
@@ -465,7 +475,7 @@ impl Callback for Metrics {
     fn call<T: TSParserTrait>(cfg: Self::Cfg, parser: &T) -> Self::Res {
         if let Some(space) = metrics(parser, &cfg.path) {
             if let Some(output_path) = cfg.output_path {
-                space.dump_json(&cfg.path, &output_path)
+                space.dump_json(&cfg.path, &output_path, cfg.pretty)
             } else {
                 space.dump_root()
             }