Banish stdin/stdout for ledger

step one: accept a "ledger file" argument instead of "outfile"

src/bin/fullnode.rs

@@ -9,7 +9,7 @@ extern crate solana;
 use atty::{is, Stream};
 use clap::{App, Arg};
 use solana::crdt::{NodeInfo, TestNode};
-use solana::fullnode::{Config, FullNode, InFile, OutFile};
+use solana::fullnode::{Config, FullNode, Ledger};
 use solana::service::Service;
 use solana::signature::{KeyPair, KeyPairUtil};
 use std::fs::File;
@@ -37,12 +37,12 @@ fn main() -> () {
                 .help("testnet; connect to the network at this gossip entry point"),
         )
         .arg(
-            Arg::with_name("output")
-                .short("o")
-                .long("output")
+            Arg::with_name("ledger")
+                .short("L")
+                .long("ledger")
                 .value_name("FILE")
                 .takes_value(true)
-                .help("output log to FILE, defaults to stdout (ignored by validators)"),
+                .help("use FILE as persistent ledger (defaults to stdin/stdout)"),
         )
         .get_matches();
     if is(Stream::Stdin) {
@@ -69,27 +69,22 @@ fn main() -> () {
             exit(1);
         }
     }
+    let ledger = if let Some(l) = matches.value_of("ledger") {
+        Ledger::Path(l.to_string())
+    } else {
+        Ledger::StdInOut
+    };
+
     let mut node = TestNode::new_with_bind_addr(repl_data, bind_addr);
     let fullnode = if let Some(t) = matches.value_of("testnet") {
         let testnet_address_string = t.to_string();
         let testnet_addr = testnet_address_string.parse().unwrap();
-        FullNode::new(
-            node,
-            false,
-            InFile::StdIn,
-            Some(keypair),
-            Some(testnet_addr),
-            None,
-        )
+
+        FullNode::new(node, false, ledger, Some(keypair), Some(testnet_addr))
     } else {
         node.data.leader_id = node.data.id;
 
-        let outfile = if let Some(o) = matches.value_of("output") {
-            OutFile::Path(o.to_string())
-        } else {
-            OutFile::StdOut
-        };
-        FullNode::new(node, true, InFile::StdIn, None, None, Some(outfile))
+        FullNode::new(node, true, ledger, None, None)
     };
     fullnode.join().expect("join");
 }