Setup Travis CI for shasper repo (#3)

* Add build scripts

* Add travis config

* Avoid committing wasm binary files

* Fix spec header test

* Add travis badge in README

.travis.yml

+# Request an environment that provides sudo (that goes with larger containers)
+# and a minimal language environment.
+sudo: true
+language: minimal
+
+cache: cargo
+
+branches:
+  only:
+  - master
+
+env:
+  global:
+    - RUST_BACKTRACE=1
+
+before_install:
+  # Check how much space we've got on this machine.
+  - df -h
+
+script:
+  - ./scripts/ci.sh
+
+after_script:
+  # Check how much free disk space left after the build
+  - df -h

README.md

 # Substrate Shasper
 
+[![Build Status](https://travis-ci.org/paritytech/shasper.svg?branch=master)](https://travis-ci.org/paritytech/shasper)
+
 *Note: This is an experimental project. Everything will break, and it may disappear without any notice!*
 
 This is an implementation of [Shasper](https://github.com/ethereum/eth2.0-specs) beacon chain using the [Substrate framework](https://github.com/paritytech/substrate).

runtime/src/spec/mod.rs

@@ -58,6 +58,6 @@ mod tests {
 
 	#[test]
 	fn spec_header_hash() {
-		assert_eq!(SpecHeader::default().hash(), H256::from("0x66cad4289cc03192dc9a0b7583d1075b17bb6b78bd91694cdd3ff5c57e31d744"));
+		assert_eq!(SpecHeader::default().spec_hash(), H256::from("0x66cad4289cc03192dc9a0b7583d1075b17bb6b78bd91694cdd3ff5c57e31d744"));
 	}
 }

scripts/build.sh

+#!/usr/bin/env bash
+
+# This script assumes that all pre-requisites are installed.
+
+set -e
+
+PROJECT_ROOT=`git rev-parse --show-toplevel`
+source `dirname "$0"`/common.sh
+
+export CARGO_INCREMENTAL=0
+
+# Save current directory.
+pushd .
+
+cd $ROOT
+
+for SRC in "${SRCS[@]}"
+do
+  echo "*** Building wasm binaries in $SRC"
+  cd "$PROJECT_ROOT/$SRC"
+
+  ./build.sh
+
+  cd - >> /dev/null
+done
+
+# Restore initial directory.
+popd

scripts/ci.sh

+#!/usr/bin/env bash
+
+set -eux
+
+sudo apt-get -y update
+sudo apt-get install -y cmake pkg-config libssl-dev
+
+# Install rustup and the specified rust toolchain.
+curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain=stable -y
+
+# Load cargo environment. Specifically, put cargo into PATH.
+source ~/.cargo/env
+
+rustc --version
+rustup --version
+cargo --version
+
+./scripts/init.sh
+./scripts/build.sh
+
+cargo test --all --locked

scripts/common.sh

+#!/usr/bin/env bash
+
+ROOT=`dirname "$0"`
+
+# A list of directories which contain wasm projects.
+SRCS=(
+	"runtime/wasm"
+)
+
+# Make pushd/popd silent.
+
+pushd () {
+	command pushd "$@" > /dev/null
+}
+
+popd () {
+	command popd "$@" > /dev/null
+}

scripts/init.sh

+#!/usr/bin/env bash
+
+set -e
+
+echo "*** Initialising WASM build environment"
+
+rustup update nightly
+rustup target add wasm32-unknown-unknown --toolchain nightly
+# Temporarily install llvm-tools.
+# See https://github.com/rust-lang/rust/issues/53813
+# TODO: Remove this when fixed.
+rustup component add llvm-tools-preview --toolchain nightly
+rustup update stable
+
+# Install wasm-gc. It's useful for stripping slimming down wasm binaries.
+command -v wasm-gc || \
+	cargo +nightly install --git https://github.com/alexcrichton/wasm-gc