Basic POC cli working

src/main.rs

@@ -0,0 +1,27 @@
+mod dithering;
+mod escpos;
+
+use image::{ImageError, ImageReader};
+use std::{env, fs, io, io::Write, process};
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let len = args.len();
+    if len < 2 || len > 2 {
+        println!("Please provide a path to the image.");
+        process::exit(1);
+    }
+
+    let img = ImageReader::open(&args[1])
+        .map_err(|err| ImageError::IoError(err))
+        .and_then(|v| v.decode())
+        .unwrap();
+
+    let mut escpos = escpos::escpos_raster(&img, Some(escpos::ImageOrientation::Largest), Some(0));
+    for _ in 0..2 {
+        escpos.push('\n' as u8);
+    }
+
+    io::stdout().write(&escpos).unwrap();
+}