Fix upgrade script and make parity run when no .parity dir.

parity/upgrade.rs

@@ -18,14 +18,15 @@
 
 use semver::Version;
 use std::collections::*;
-use std::fs::File;
+use std::fs::{File, create_dir_all};
 use std::env;
 use std::io::{Read, Write};
 
 #[cfg_attr(feature="dev", allow(enum_variant_names))]
 #[derive(Debug)]
 pub enum Error {
-	CannotLockVersionFile,
+	CannotCreateConfigPath,
+	CannotWriteVersionFile,
 	CannotUpdateVersionFile,
 }
 
@@ -66,7 +67,7 @@ fn dummy_upgrade() -> Result<(), Error> {
 	Ok(())
 }
 
-fn push_updrades(upgrades: &mut UpgradeList)
+fn push_upgrades(upgrades: &mut UpgradeList)
 {
 	// dummy upgrade (remove when the first one is in)
 	upgrades.insert(
@@ -76,7 +77,7 @@ fn push_updrades(upgrades: &mut UpgradeList)
 
 fn upgrade_from_version(previous_version: &Version) -> Result<usize, Error> {
 	let mut upgrades = HashMap::new();
-	push_updrades(&mut upgrades);
+	push_upgrades(&mut upgrades);
 
 	let current_version = Version::parse(CURRENT_VERSION).unwrap();
 
@@ -96,6 +97,7 @@ fn with_locked_version<F>(script: F) -> Result<usize, Error>
 {
 	let mut path = env::home_dir().expect("Applications should have a home dir");
 	path.push(".parity");
+	try!(create_dir_all(&path).map_err(|_| Error::CannotCreateConfigPath));
 	path.push("ver.lock");
 
 	let version =
@@ -108,7 +110,7 @@ fn with_locked_version<F>(script: F) -> Result<usize, Error>
 			})
 			.unwrap_or_else(|| Version::parse("0.9.0").unwrap());
 
-	let mut lock = try!(File::create(&path).map_err(|_| Error::CannotLockVersionFile));
+	let mut lock = try!(File::create(&path).map_err(|_| Error::CannotWriteVersionFile));
 	let result = script(&version);
 
 	let written_version = Version::parse(CURRENT_VERSION).unwrap();