diff --git a/Cargo.lock b/Cargo.lock
index a8063f1..f0cead3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,230 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
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diff --git a/Cargo.toml b/Cargo.toml
index ddb89c3..cccf2b0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,5 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+structopt = "0.3.15"
+glob = "0.3.0"
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..ce4096c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,28 @@
-fn main() {
-    println!("Hello, world!");
+use glob::glob;
+use std::path::PathBuf;
+use structopt::StructOpt;
+
+#[derive(StructOpt, Debug)]
+#[structopt()]
+struct Opt {
+    #[structopt(name = "files")]
+    files: Vec<String>,
+}
+
+fn get_files(files: &[String]) -> Option<Vec<PathBuf>> {
+    let mut all_files = Vec::new();
+    for file in files {
+        for path in glob(&file).ok()?.filter_map(Result::ok) {
+            if path.is_file() {
+                all_files.push(path);
+            }
+        }
+    }
+
+    Some(all_files)
+}
+
+fn main() {
+    let opts = Opt::from_args();
+    println!("{:?}", get_files(&opts.files));
 }