Add support for --license arg (#38)

crates/solidity/src/resolc/arguments.rs

@@ -19,6 +19,10 @@ pub struct Arguments {
     #[structopt(long = "version")]
     pub version: bool,
 
+    /// Print the licence and exit.
+    #[structopt(long = "license")]
+    pub license: bool,
+
     /// Specify the input paths and remappings.
     /// If an argument contains a '=', it is considered a remapping.
     /// Multiple Solidity files can be passed in the default Solidity mode.

crates/solidity/src/resolc/main.rs

@@ -39,6 +39,14 @@ fn main_inner() -> anyhow::Result<()> {
         return Ok(());
     }
 
+    if arguments.license {
+        let license_mit = include_str!("../../../../LICENSE-MIT");
+        let license_apache = include_str!("../../../../LICENSE-APACHE");
+
+        println!("{}\n{}\n", license_mit, license_apache);
+        return Ok(());
+    }
+
     rayon::ThreadPoolBuilder::new()
         .stack_size(RAYON_WORKER_STACK_SIZE)
         .build_global()