commit 56f02effc839c9a6c95cbe2d3b409a362d211e13
Author: Austen Adler <agadler@austenadler.com>
Date:   Mon Sep 2 14:12:14 2024 -0400

    Initial version

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+clap = { version = "4.5.16", features = ["derive"] }
+fjson = "0.3.1"
+notify-debouncer-mini = "0.4.1"
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..f46cc1e
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,136 @@
+use anyhow::{bail, Context, Result};
+use clap::{Args, Parser, Subcommand};
+use notify_debouncer_mini::{new_debouncer, notify::*, DebounceEventResult};
+use std::{
+    fs,
+    io::Write,
+    path::{Path, PathBuf},
+    time::Duration,
+};
+
+#[derive(Parser, Debug)]
+struct Cli {
+    #[command(subcommand)]
+    command: Command,
+}
+
+#[derive(Subcommand, Debug)]
+enum Command {
+    Fmt(FmtArgs),
+    // Watch(WatchArgs),
+}
+
+// #[derive(Args, Debug)]
+// struct WatchArgs {
+//     dir: PathBuf
+// }
+
+#[derive(Args, Debug)]
+struct FmtArgs {
+    #[clap(short = 'i', long = "input")]
+    input: PathBuf,
+    #[clap(short = 'o', long = "output")]
+    output: Option<PathBuf>,
+
+    #[clap(short = 'O', long = "json-output")]
+    json_output: Option<PathBuf>,
+
+    #[clap(short = 'c', long = "compact")]
+    compact: bool,
+}
+
+fn main() -> Result<()> {
+    let options = Cli::parse();
+
+    eprintln!("Options: {options:?}");
+
+    match options.command {
+        Command::Fmt(a) => {
+            if a.compact && a.json_output.is_none() {
+                bail!("Cannot compact format jsonc. Specify --json-output if you want to use --compact");
+            }
+            format_single_file(&a)?;
+        }
+    }
+
+    Ok(())
+}
+
+fn format_single_file(args: &FmtArgs) -> Result<()> {
+    let input_str = fs::read_to_string(&args.input).context("Reading input")?;
+
+    if args.output.is_none() && args.json_output.is_none() {
+        // They only want to print to stdout
+        println!(
+            "{}",
+            fjson::to_jsonc(&input_str).context("Formatting to jsonc")?
+        );
+
+        return Ok(());
+    }
+
+    if let Some(ref output) = args.output {
+        let mut output_file = fs::OpenOptions::new()
+            .create(true)
+            .truncate(true)
+            .write(true)
+            .open(output)
+            .context("Opening output file")?;
+
+        let output = fjson::to_jsonc(&input_str).context("Formatting to jsonc")?;
+
+        output_file
+            .write_all(&output.as_bytes())
+            .context("Writing jsonc output")?;
+
+        output_file.flush().context("Flushing jsonc output")?;
+    }
+
+    if let Some(ref json_output) = args.json_output {
+        let mut json_output_file = fs::OpenOptions::new()
+            .create(true)
+            .truncate(true)
+            .write(true)
+            .open(json_output)
+            .context("Opening output file")?;
+
+        let output = if args.compact {
+            fjson::to_json(&input_str).context("Formatting to json")
+        } else {
+            fjson::to_json_compact(&input_str).context("Formatting to json")
+        }?;
+
+        json_output_file
+            .write_all(&output.as_bytes())
+            .context("Writing json output")?;
+        json_output_file.flush().context("Flushing json output")?;
+    }
+
+    Ok(())
+}
+
+// fn x() {
+//     // Select recommended watcher for debouncer.
+//     // Using a callback here, could also be a channel.
+//     let mut debouncer =
+//         new_debouncer(
+//             Duration::from_millis(50),
+//             |res: DebounceEventResult| match res {
+//                 Ok(events) => events
+//                     .iter()
+//                     .for_each(|e| println!("Event {:?} for {:?}", e.kind, e.path)),
+//                 Err(e) => println!("Error {:?}", e),
+//             },
+//         )
+//         .unwrap();
+
+//     // Add a path to be watched. All files and directories at that path and
+//     // below will be monitored for changes.
+//     debouncer
+//         .watcher()
+//         .watch(Path::new("."), RecursiveMode::Recursive)
+//         .unwrap();
+
+//     // note that dropping the debouncer (as will happen here) also ends the debouncer
+//     // thus this demo would need an endless loop to keep running
+// }