Initial travis-ci and coveralls Integration (#121)

Contains the initial scripts and configuration for travis-ci and coveralls integration.

Fixes #96

.gitignore

+/build
+/installs
+/coverage.out

.travis.yml

+language: go
+go:
+  - 1.6
+#  - tip # broken for 1.7
+sudo: false
+#notifications:
+#  slack:
+#    secure: <INSERT ENCRYPTED SLACK KEY HERE>
+addons:
+  apt:
+    sources:
+      - ubuntu-toolchain-r-test
+      - llvm-toolchain-precise-3.8
+    packages:
+      - clang-3.8
+      - libbz2-dev
+      - libsnappy-dev
+      - zlib1g-dev
+env:
+  - CC=clang-3.8 CXX=clang++-3.8
+cache:
+  apt: true
+  directories:
+    - $HOME/build
+install:
+  - bash contrib/build-rocksdb.sh $HOME/build
+before_script:
+  - go get github.com/mattn/goveralls
+  - go get github.com/kardianos/govendor
+script:
+  - govendor sync
+  - bash contrib/cover.sh $HOME/build coverage.out
+  - goveralls -service=travis-ci -coverprofile=coverage.out

contrib/README.md

+The `contrib` directory contains scripts, images, and other helpful things
+which are not part of the core dgraph distribution. Please note that they
+could be out of date, since they do not receive the same attention as the
+rest of the repository.

contrib/build-rocksdb.sh

+#!/bin/bash
+
+ROCKSDBVER="4.2"
+ROCKSDBURL="https://github.com/facebook/rocksdb/archive/v${ROCKSDBVER}.tar.gz"
+ROCKSDBFILE="rocksdb-${ROCKSDBVER}.tar.gz"
+ROCKSDBDIR=rocksdb-${ROCKSDBVER}
+ROCKSDBLIB=librocksdb.so.${ROCKSDBVER}
+
+SRC="$( cd -P "$( dirname "${BASH_SOURCE[0]}" )" && pwd )/.."
+
+BUILD=$1
+if [ -z "$1" ]; then
+  BUILD=$SRC/build
+fi
+
+[ -d $BUILD ] || mkdir -p $BUILD
+
+set -e
+
+pushd $BUILD &> /dev/null
+
+# download
+if [ ! -f $ROCKSDBFILE ]; then
+  wget -O $ROCKSDBFILE $ROCKSDBURL
+fi
+
+# extract
+if [ ! -d $ROCKSDBDIR ]; then
+  tar -zxf $ROCKSDBFILE
+fi
+
+# configure, build
+if [ ! -e $ROCKSDBDIR/${ROCKSDBLIB} ]; then
+  cd $ROCKSDBDIR
+  make shared_lib
+fi
+
+popd &> /dev/null

contrib/cover.sh

+#!/bin/bash
+
+SRC="$( cd -P "$( dirname "${BASH_SOURCE[0]}" )" && pwd )/.."
+TMP=$(mktemp -p /tmp dgraph-coverage-XXXXX.txt)
+
+BUILD=$1
+if [ -z "$1" ]; then
+  BUILD=$SRC/build
+fi
+
+OUT=$2
+if [ -z "$OUT" ]; then
+  OUT=$SRC/coverage.out
+fi
+rm -f $OUT
+
+ROCKSDBDIR=$BUILD/rocksdb-4.2
+
+set -e
+
+pushd $SRC &> /dev/null
+
+# build flags needed for rocksdb
+export CGO_CFLAGS="-I${ROCKSDBDIR}/include"
+export CGO_LDFLAGS="-L${ROCKSDBDIR}"
+export LD_LIBRARY_PATH="${ROCKSDBDIR}:${LD_LIBRARY_PATH}"
+
+# create coverage output
+echo 'mode: atomic' > $OUT
+for PKG in $(go list ./...|grep -v '/vendor/'); do
+  echo "TESTING: $PKG"
+  go test -v -covermode=atomic -coverprofile=$TMP $PKG
+  tail -n +2 $TMP >> $OUT
+done
+
+# open in browser if not in a build environment
+if [ ! -z "$DISPLAY" ]; then
+  go tool cover -html=$OUT
+fi
+
+popd &> /dev/null