Add scaffolding for the 'scan' functionality

Author: EncodePanda

README.md

@@ -4,6 +4,23 @@
 artifacts and cleans them up safely. It supports many common languages and build
 systems including Rust, Node.js, Python, Java, and more.
 
+## Usage
+
+```
+> crafty help
+A command-line tool that scans projects for large build artifacts and cleans them up
+
+Usage: crufty <COMMAND>
+
+Commands:
+  scan  Scan for build artifacts in the current directory
+  help  Print this message or the help of the given subcommand(s)
+
+Options:
+  -h, --help     Print help
+  -V, --version  Print version
+```
+
 ## Usage example
 
 ### Basic Scan

src/crufty.rs

@@ -1 +1,13 @@
+#![allow(dead_code)]
+use std::path::PathBuf;
+
 pub mod cli;
+
+pub struct ArtifactCandidate {
+    path: PathBuf,
+    size: Option<u64>,
+}
+
+pub fn fetch_artifacts(_path : &PathBuf) ->  Vec<ArtifactCandidate> {
+  vec![]
+}

src/main.rs

@@ -1,5 +1,37 @@
+use clap::Parser;
+use console::{style, Term};
+use crufty::cli::{Cli, Commands};
+use crufty::fetch_artifacts;
+use std::env;
+use std::io;
+use std::process;
 
 mod crufty;
+
 fn main() {
-    println!("Crufty!");
+  let cli = Cli::parse();
+
+  match &cli.command {
+    Commands::Scan => match scan() {
+      Err(err) => exit_unrecoverable(err),
+      Ok(_) => {}
+    },
+  }
+}
+
+fn scan() -> io::Result<()> {
+  let term = Term::stdout();
+  let path = env::current_dir()?;
+  term
+    .write_line(&format!("[+] Scanning: {}", style(path.display()).bold()))?;
+  term.write_line("")?;
+  let _ = fetch_artifacts(&path);
+  Ok(())
+}
+
+fn exit_unrecoverable(_err: io::Error) {
+  let term_err = Term::stdout();
+  let error_message = "Encountered error, existing...";
+  let _ = term_err.write_line(&format!("{}", error_message));
+  process::exit(1);
 }