+#!/bin/bash
+
+# Installs folly's dependencies to /usr/local on a clean Ubuntu 12.04 x64
+# system. Primarily intended for Travis CI, since most engineers don't run
+# distributions this stale.
+#
+# WARNING: Uses 'sudo' to upgrade your system with impunity:
+# - Adds several PPAs for missing/outdated dependencies
+# - Installs several from-source dependencies in /usr/local
+#
+# Library sources & build files end up in folly/folly/deps/
+
+set -ex
+
+BUILD_DIR="$(readlink -f "$(dirname "$0")")"
+mkdir -p "$BUILD_DIR/deps"
+cd "$BUILD_DIR/deps"
+
+sudo apt-get install -y python-software-properties # for add-apt-repository
+sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+sudo add-apt-repository -y ppa:boost-latest/ppa
+sudo apt-get update
+
+sudo apt-get install -y git gcc-4.8 g++-4.8 libboost1.54-dev autoconf git \
+ libboost-thread1.54-dev libboost-filesystem1.54-dev libssl-dev cmake \
+ libsnappy-dev libboost-system1.54-dev libboost-regex1.54-dev make \
+ libboost-context1.54-dev libtool libevent-dev libgtest-dev binutils-dev
+
+# TODO: According to the folly docs, these system dependencies might be
+# missing. However, things seem to build fine...
+# automake autoconf-archive libboost-all-dev liblz4-dev liblzma-dev
+# zlib1g-dev libjemalloc-dev
+
+sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 50
+sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 50
+
+CMAKE_NAME=cmake-2.8.12.1
+GFLAGS_VER=2.1.1
+GLOG_NAME=glog-0.3.3
+
+# double-conversion
+pushd .
+git clone https://github.com/google/double-conversion
+cd double-conversion
+cmake -DBUILD_SHARED_LIBS=ON . # Don't use scons instead, it's broken.
+make
+sudo make install
+sudo ldconfig
+popd
+
+# Newer cmake, since the system's 2.8.7 cmake is too old for gflags:
+# https://groups.google.com/forum/#!topic/google-gflags/bu1iIDKn-ok
+pushd .
+wget http://www.cmake.org/files/v2.8/${CMAKE_NAME}.tar.gz \
+ -O ${CMAKE_NAME}.tar.gz
+tar xzf ${CMAKE_NAME}.tar.gz
+cd ${CMAKE_NAME}
+cmake .
+make
+CMAKE="$(readlink -f bin/cmake)"
+popd
+
+# gflags
+pushd .
+wget https://github.com/gflags/gflags/archive/v${GFLAGS_VER}.tar.gz \
+ -O gflags-${GFLAGS_VER}.tar.gz
+tar xzf gflags-${GFLAGS_VER}.tar.gz
+mkdir -p gflags-${GFLAGS_VER}/build/ && cd gflags-${GFLAGS_VER}/build/
+"$CMAKE" .. -DBUILD_SHARED_LIBS:BOOL=ON -DGFLAGS_NAMESPACE:STRING=google
+make
+sudo make install
+sudo ldconfig
+popd
+
+# glog
+pushd .
+wget https://google-glog.googlecode.com/files/${GLOG_NAME}.tar.gz \
+ -O ${GLOG_NAME}.tar.gz
+tar xzf ${GLOG_NAME}.tar.gz
+cd ${GLOG_NAME}
+./configure
+make
+sudo make install
+sudo ldconfig
+popd