step two: add argument parser

Cargo.lock

@@ -1,5 +1,113 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "ansi_term"
+version = "0.11.0"
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+dependencies = [
+ "winapi",
+]
+
+[[package]]
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+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "bitflags"
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+
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+ "ansi_term",
+ "atty",
+ "bitflags",
+ "strsim",
+ "textwrap",
+ "unicode-width",
+ "vec_map",
+]
+
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+ "libc",
+]
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+name = "libc"
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+
 [[package]]
 name = "rgit"
 version = "0.1.0"
+dependencies = [
+ "clap",
+]
+
+[[package]]
+name = "strsim"
+version = "0.8.0"
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+ "unicode-width",
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+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
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+[[package]]
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Cargo.toml

@@ -7,3 +7,4 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+clap = "2.33.3"

src/main.rs

@@ -1,3 +1,18 @@
+use clap::{App, SubCommand};
+
 fn main() {
+    let matches = App::new("rgit vcs")
+        .version("0.1.0")
+        .author("Gonçalo Valério <gon@ovalerio.net>")
+        .about("A watered-down git clone")
+        .subcommand(SubCommand::with_name("init").about("creates new repository"))
+        .get_matches();
+
+    if let Some(_) = matches.subcommand_matches("init") {
+        init();
+    }
+}
+
+fn init() {
     println!("Hello, world!");
 }