Move solana-keygen into keygen/

keygen/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "solana-keygen"
+version = "0.11.0"
+description = "Solana key generation utility"
+authors = ["Solana Maintainers <maintainers@solana.com>"]
+repository = "https://github.com/solana-labs/solana"
+license = "Apache-2.0"
+
+[dependencies]
+dirs = "1.0.2"
+clap = "2.31"
+solana-sdk = { path = "../sdk", version = "0.11.0" }
+
+[[bin]]
+name = "solana-keygen"
+path = "src/keygen.rs"
+

keygen/src/keygen.rs

@@ -0,0 +1,36 @@
+#[macro_use]
+extern crate clap;
+extern crate dirs;
+extern crate solana_sdk;
+
+use clap::{App, Arg};
+use solana_sdk::signature::gen_keypair_file;
+use std::error;
+
+fn main() -> Result<(), Box<dyn error::Error>> {
+    let matches = App::new("solana-keygen")
+        .version(crate_version!())
+        .arg(
+            Arg::with_name("outfile")
+                .short("o")
+                .long("outfile")
+                .value_name("PATH")
+                .takes_value(true)
+                .help("Path to generated file"),
+        )
+        .get_matches();
+
+    let mut path = dirs::home_dir().expect("home directory");
+    let outfile = if matches.is_present("outfile") {
+        matches.value_of("outfile").unwrap()
+    } else {
+        path.extend(&[".config", "solana", "id.json"]);
+        path.to_str().unwrap()
+    };
+
+    let serialized_keypair = gen_keypair_file(outfile.to_string())?;
+    if outfile == "-" {
+        println!("{}", serialized_keypair);
+    }
+    Ok(())
+}