Initial cli setup.

src/main.rs

@@ -0,0 +1,65 @@
+extern crate clap;
+use clap::{App, Arg};
+use std::fs;
+use std::process::exit;
+
+fn main() {
+    let params = App::new("shred")
+        .version("0.1.0")
+        .author("Alexey Zinchenko <alexey.zinchenko@protonmail.com>")
+        .about("TODO")
+        .arg(Arg::with_name("PATH")
+            .help("Sets the path of file or directory to use")
+            .required(true)
+            .index(1))
+        .arg(Arg::with_name("v")
+            .short("v")
+            .multiple(true)
+            .help("Sets the level of verbosity"))
+        .arg(Arg::with_name("r")
+            .short("r")
+            .help("Do shredding operations recursively"))
+        .arg(Arg::with_name("i")
+            .short("i")
+            .long("interactive")
+            .help("Enables interactive mode")
+        )
+        .get_matches();
+
+    let verbosity = match params.occurrences_of("v") {
+        1 => Verbosity::Low,
+        2 => Verbosity::Average,
+        3 => Verbosity::High,
+        _ => Verbosity::None
+    };
+
+    let is_recursively = params.is_present("r");
+    let is_interactive = params.is_present("i");
+
+    // Calling .unwrap() is safe here because "INPUT" is required (if "INPUT" wasn't
+    // required we could have used an 'if let' to conditionally get the value)
+    let path = params.value_of("PATH").unwrap();
+    match fs::metadata(path) {
+        Ok(metadata) => {
+            println!("Exists: OK");
+            println!("Is directory: {}", metadata.is_dir());
+            println!("Is file: {}", metadata.is_file());
+            println!("Is recursively: {}", is_recursively);
+            println!("Is interactive: {}", is_interactive);
+            println!("Verbosity: {:?}", verbosity);
+        }
+        Err(_) => {
+            println!("Provided path is invalid!");
+            exit(1);
+        }
+    }
+    println!("Using input file: {}", path);
+}
+
+#[derive(Debug)]
+enum Verbosity {
+    None,
+    Low,
+    Average,
+    High
+}