Command line args

cli/.gitignore

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+.vscode
+target/

cli/Cargo.toml

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+[package]
+name = "zecpaperwallet"
+version = "0.1.0"
+authors = ["ZecWallet"]
+edition = "2018"
+
+[dependencies]
+clap = "~2.33"

cli/src/main.rs

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+extern crate clap; 
+use clap::{Arg, App, SubCommand};
+
+fn main() { 
+    App::new("zecpaperwaller")
+       .version("1.0")
+       .about("A command line Zcash Sapling paper wallet generator")
+       .arg(Arg::with_name("testnet")
+                .short("t")
+                .long("testnet")
+                .help("Generate Testnet addresses."))
+        .arg(Arg::with_name("format")
+                .short("f")
+                .long("format")
+                .help("What format to generate the output in.")
+                .takes_value(true)
+                .value_name("FORMAT")
+                .possible_values(&["png", "pdf", "txt"]))
+        .arg(Arg::with_name("output")
+                .short("o")
+                .long("output")
+                .index(1)
+                .required(true)
+                .help("Name of output file."))
+       .get_matches(); 
+}