Refactored bin commands into separate files

src/commands.rs

@@ -0,0 +1,6 @@
+mod cache;
+mod run;
+mod selfupdate;
+mod validate;
+
+pub use {cache::*, run::*, selfupdate::*, validate::*};

src/commands/cache.rs

@@ -0,0 +1,31 @@
+use crate::common::get_cache_dir;
+use structopt::StructOpt;
+
+#[derive(Debug, StructOpt)]
+pub enum Cache {
+    /// Clear the cache
+    #[structopt(name = "clean")]
+    Clean,
+
+    /// Display the location of the cache
+    #[structopt(name = "dir")]
+    Dir,
+}
+
+impl Cache {
+    pub fn execute(&self) {
+        match &self {
+            Cache::Clean => {
+                use std::fs;
+                let cache_dir = get_cache_dir();
+                if cache_dir.exists() {
+                    fs::remove_dir_all(cache_dir.clone()).expect("Can't remove cache dir");
+                }
+                fs::create_dir_all(cache_dir.clone()).expect("Can't create cache dir");
+            }
+            Cache::Dir => {
+                println!("{}", get_cache_dir().to_string_lossy());
+            }
+        }
+    }
+}