feat: bring over the formatter from gleam

crates/cli/src/cmd/fmt.rs

@@ -0,0 +1,31 @@
+#[derive(clap::Args)]
+/// Create a new Aiken project
+pub struct Args {
+    /// Files to format
+    #[clap(default_value = ".")]
+    files: Vec<String>,
+
+    /// Read source from STDIN
+    #[clap(long)]
+    stdin: bool,
+
+    /// Check if inputs are formatted without changing them
+    #[clap(long)]
+    check: bool,
+}
+
+pub fn exec(
+    Args {
+        check,
+        stdin,
+        files,
+    }: Args,
+) -> miette::Result<()> {
+    if let Err(err) = aiken_project::format::run(stdin, check, files) {
+        err.report();
+
+        miette::bail!("failed: {} error(s)", err.total());
+    };
+
+    Ok(())
+}

crates/cli/src/cmd/mod.rs

@@ -1,5 +1,6 @@
 pub mod build;
 pub mod check;
+pub mod fmt;
 pub mod new;
 pub mod tx;
 pub mod uplc;

crates/cli/src/main.rs

@@ -1,4 +1,4 @@
-use aiken::cmd::{build, check, new, tx, uplc};
+use aiken::cmd::{build, check, fmt, new, tx, uplc};
 use clap::Parser;
 
 /// Aiken: a smart-contract language and toolchain for Cardano
@@ -8,6 +8,7 @@ use clap::Parser;
 #[clap(setting(clap::AppSettings::DeriveDisplayOrder))]
 pub enum Cmd {
     New(new::Args),
+    Fmt(fmt::Args),
     Build(build::Args),
     Check(check::Args),
 
@@ -28,6 +29,7 @@ fn main() -> miette::Result<()> {
     miette::set_panic_hook();
     match Cmd::default() {
         Cmd::New(args) => new::exec(args),
+        Cmd::Fmt(args) => fmt::exec(args),
         Cmd::Build(args) => build::exec(args),
         Cmd::Check(args) => check::exec(args),
         Cmd::Tx(sub_cmd) => tx::exec(sub_cmd),