Backport core PRs to stable (#7892)

* update back-references more aggressively after answering from cache (#7578)

* Flush keyfiles. Resolves #7632 (#7868)

* Fix wallet import (#7873)

* rpc: generate new account id for imported wallets

* ethstore: handle duplicate wallet filenames

* ethstore: simplify deduplication of wallet file names

* ethstore: do not dedup wallet filenames on update

* ethstore: fix minor grumbles

* parity-version pr reopen (#7136)

* parity-version module split from util

removed unused util deps and features

trigger buildbot again

only kvdb links rocksdb

snappy linker issues

* rm snappy

* fixed old version imports

* Move updater metadata to Cargo.toml of parity-version. (#7832)

* Update version.

* Bump parity version.

* Fix version.

* Fix compilation.

util/version/src/lib.rs

@@ -0,0 +1,77 @@
+// Copyright 2015-2017 Parity Technologies (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Parity version specific information.
+
+extern crate target_info;
+extern crate ethcore_bytes as bytes;
+extern crate rlp;
+
+use target_info::Target;
+use bytes::Bytes;
+use rlp::RlpStream;
+
+mod vergen {
+	#![allow(unused)]
+	include!(concat!(env!("OUT_DIR"), "/version.rs"));
+}
+
+mod generated {
+	include!(concat!(env!("OUT_DIR"), "/meta.rs"));
+}
+
+#[cfg(feature = "final")]
+const THIS_TRACK: &'static str = generated::TRACK;
+// ^^^ should be reset in Cargo.toml to "stable" or "beta" according to the release branch.
+
+#[cfg(not(feature = "final"))]
+const THIS_TRACK: &'static str = "unstable";
+// ^^^ This gets used when we're not building a final release; should stay as "unstable".
+
+/// Get the platform identifier.
+pub fn platform() -> String {
+	let env = Target::env();
+	let env_dash = if env.is_empty() { "" } else { "-" };
+	format!("{}-{}{}{}", Target::arch(), Target::os(), env_dash, env)
+}
+
+/// Get the standard version string for this software.
+pub fn version() -> String {
+	let sha3 = vergen::short_sha();
+	let sha3_dash = if sha3.is_empty() { "" } else { "-" };
+	let commit_date = vergen::commit_date().replace("-", "");
+	let date_dash = if commit_date.is_empty() { "" } else { "-" };
+	format!("Parity/v{}-{}{}{}{}{}/{}/rustc{}", env!("CARGO_PKG_VERSION"), THIS_TRACK, sha3_dash, sha3, date_dash, commit_date, platform(), generated::rustc_version())
+}
+
+/// Get the standard version data for this software.
+pub fn version_data() -> Bytes {
+	let mut s = RlpStream::new_list(4);
+	let v =
+		(env!("CARGO_PKG_VERSION_MAJOR").parse::<u32>().expect("Environment variables are known to be valid; qed") << 16) +
+		(env!("CARGO_PKG_VERSION_MINOR").parse::<u32>().expect("Environment variables are known to be valid; qed") << 8) +
+		env!("CARGO_PKG_VERSION_PATCH").parse::<u32>().expect("Environment variables are known to be valid; qed");
+	s.append(&v);
+	s.append(&"Parity");
+	s.append(&generated::rustc_version());
+	s.append(&&Target::os()[0..2]);
+	s.out()
+}
+
+/// Provide raw information on the package.
+pub fn raw_package_info() -> (&'static str, &'static str, &'static str) {
+	(THIS_TRACK, env!["CARGO_PKG_VERSION"], vergen::sha())
+}