mac-setup.sh

#!/bin/sh

# Bail on any errors
set -e

update_path() {
    # We need /usr/local/bin to come before /usr/bin on the path,
    # to pick up brew files we install.
    if ! echo "$PATH" | egrep -q '(:|^)/usr/local/bin/?:(.*:)?/usr/bin/?(:|$)'
    then
        # This replaces /usr/bin with /usr/local/bin:/usr/bin
        PATH=`echo $PATH | sed -E 's,(^|:)(/usr/bin/?(:|$)),\1/usr/local/bin:\2,'`
        # Make this path update work in the future too.
        path_update=`cat<<'EOF'
echo $PATH | sed -E 's,(^|:)(/usr/bin/?(:|$)),\1/usr/local/bin:\2,'
EOF`
    else
        path_update=''
    fi

    # Ideally we'd put /usr/local/sbin right before /usr/sbin, but
    # there's so little in it -- probably only nginx -- we figure it's
    # safe enough to just put it first.
    export PATH=/usr/local/sbin:$PATH

    # Put these in shell config file too.
    # Test whether it's already in a config file (sorry zsh users who
    # aren't using .profile).  We follow the same order bash does:
    if [ -f ~/.bash_profile ]; then
        PROFILE_FILE="$HOME/.bash_profile"
    elif [ -f ~/.bash_login ]; then
        PROFILE_FILE="$HOME/.bash_login"
    else
        PROFILE_FILE="$HOME/.profile"
    fi
    if ! grep -q "export PATH=.*/usr/local/sbin" \
        ~/.bash_profile ~/.bash_login ~/.profile; then
        echo 'export PATH=/usr/local/sbin:$PATH' >> "$PROFILE_FILE"
    fi
    if [ -n "$path_update" ]; then
        echo "# Put /usr/local/bin right before /usr/bin" >> "$PROFILE_FILE"
        echo 'PATH=`'"$path_update"'`' >> "$PROFILE_FILE"
    fi
}

register_ssh_keys() {
    # Create a public key if need be.
    mkdir -p ~/.ssh
    if [ ! -e ~/.ssh/id_rsa ]; then
        ssh-keygen -q -N "" -t rsa -f ~/.ssh/id_rsa
    fi

    # Copy the public key into the OS X clipboard.
    cat ~/.ssh/id_rsa.pub | pbcopy

    # Have the user copy it into kiln and github.
    echo "Opening kiln and github for you to register your ssh key."
    echo "We've already copied the key into the OS clipboard for you."
    echo "Click 'Add SSH Key', paste into the box, and hit 'Add key'"
    open "https://github.com/settings/ssh"
    read -p "Press enter to continue..."

    echo "Click 'Add a New Key', paste into the box, and hit 'Save key'"
    open "https://khanacademy.kilnhg.com/Keys"
    read -p "Press enter to continue..."
}

install_gcc() {
    if ! gcc --version >/dev/null 2>&1; then
        # download the command line tools
        if sw_vers | grep ProductVersion | grep -o 10.8; then
            echo "Downloading Command Line Tools for OS 10.8 (login to start the download)"
            open "http://developer.apple.com/downloads/download.action?path=Developer_Tools/command_line_tools_os_x_mountain_lion_for_xcode__april_2013/xcode462_cltools_10_86938259a.dmg"
            dmg_name="xcode462_cltools_10_86938259a.dmg"
            pkg_name="Command Line Tools (Mountain Lion)" fi
        elif sw_vers | grep ProductVersion | grep -o 10.7; then
            echo "Downloading Command Line Tools for MacOS 10.7 (login to start the download)"
            open "http://developer.apple.com/downloads/download.action?path=Developer_Tools/command_line_tools_os_x_lion_for_xcode__april_2013/xcode462_cltools_10_76938260a.dmg"
            dmg_name="xcode462_cltools_10_76938260a.dmg"
            pkg_name="Command Line Tools (Lion)"
        elif sw_vers | grep ProductVersion | grep -o 10.9; then
            echo "You fancy! Opening the ADC downloads site. You can take it from there"
            open "http://developer.apple.com/downloads/"
            exit 1
        else
            echo "Command line tools are unavailable for your Mac's OS"
            echo "Kayla or Kamens will help you upgrade your OS if you need help."
            exit 1
        fi
        # If this doesn't work for you, you can find the most recent
        # version here: https://developer.apple.com/downloads
        # Then plug that file into the commands below
        read -p "Press enter to continue once the dmg has finished downloading..."

        echo "Running Command Line Tools Installer"
        # Attach the disk image, install the tools, then detach the image.
        hdiutil attach ~/Downloads/"$dmg_name" > /dev/null
        sudo installer \
                -package "/Volumes/$pkg_name/$pkg_name.mpkg" \
                -target /
        hdiutil detach "/Volumes/$pkg_name/" > /dev/null
    fi
}

install_hipchat() {
    if ! open -R -g -a HipChat > /dev/null; then
        echo "Installing HipChat to ~/Applications"
        mkdir -p ~/Applications
        hipchat_app_url="http://downloads.hipchat.com.s3.amazonaws.com/osx/HipChat-2.3.zip"
        curl -o ~/Downloads/Hipchat-2.3.zip $hipchat_app_url
        unzip ~/Downloads/Hipchat-2.3.zip -d ~/Applications > /dev/null
        open -a ~/Applications/HipChat.app
    else
        echo "HipChat already installed"
    fi
}

install_homebrew() {
    # If homebrew is already installed, don't do it again.
    if ! brew --help >/dev/null 2>&1; then
        echo "Installing Homebrew"
        /usr/bin/ruby -e "`curl -fsSkL raw.github.com/mxcl/homebrew/go`"
    fi
    echo "Updating Homebrew"
    brew update > /dev/null

    # Make the cellar.
    mkdir -p /usr/local/Cellar

    # Make sure everything is ok.  We don't care if we're using an
    # obsolete gcc, so instead of looking at the exit code for 'brew
    # doctor', we look at its output.  The last 'grep', combined with
    # the ! at the beginning of this command, causes the overall
    # command to fail -- and thus the script to exit -- if brew doctor
    # has any errors or warnings after we grep out the stuff we don't
    # care about.
    ## Commented out for now: too many legit setups have warnings (cf chris).
    ## ! brew doctor 2>&1 \
    ##     | grep -v -e 'A newer Command Line Tools' \
    ##     | grep -v -e 'Your Homebrew is not installed to /usr/local' \
    ##     | grep -C1000 -e ^Error -e ^Warning
}

update_git() {
    if ! git --version | grep -q -e 'version 1.[89]' \
                                 -e 'version 2'; then
        echo "Installing an updated version of git using Homebrew"
        echo "Current version is `git --version`"

        if brew ls git >/dev/null 2>&1; then
            # If git is already installed via brew, update it
            brew upgrade git || true
        else
            # Otherwise, install via brew
            brew install git || true
        fi

        # Check git version again
        if ! git --version | grep -q -e 'version 1.[89]' \
                                     -e 'version 2'; then
            echo "Error installing git via brew; download and install manually via http://git-scm.com/download/mac. "
            read -p "Press enter to continue..."
        fi
    fi
}

install_node() {
    if ! brew ls node >/dev/null 2>&1; then
        brew install node 2>&1
    fi
    if ! npm --version >/dev/null; then
        curl https://npmjs.org/install.sh | sh
    fi
}

install_nginx() {
    echo "Installing nginx"
    if ! brew install nginx 2>&1 | grep -q 'already installed'; then
        if [ ! -e /usr/local/etc/nginx/nginx.conf.old ]; then
            echo "Backing up nginx.conf to nginx.conf.old"
            sudo cp /usr/local/etc/nginx/nginx.conf \
                /usr/local/etc/nginx/nginx.conf.old
        fi

        # Copy some default SSL certificates.  If you want to make your
        # own, follow the instructions found here:
        #     http://wiki.nginx.org/HttpSslModule
        sudo cp -f stable.ka.local.crt /usr/local/etc/nginx/stable.ka.local.crt
        sudo cp -f stable.ka.local.key /usr/local/etc/nginx/stable.ka.local.key

        echo "Setting up nginx"
        # setup the nginx configuration file
        sudo sh -c \
            "sed 's/%USER/$USER/' nginx.conf > /usr/local/etc/nginx/nginx.conf"

        # Copy the launch plist.
        sudo cp -f /usr/local/Cellar/nginx/*/homebrew.mxcl.nginx.plist \
            /Library/LaunchDaemons
        # Delete the username key so it is run as root
        sudo /usr/libexec/PlistBuddy -c "Delete :UserName" \
            /Library/LaunchDaemons/homebrew.mxcl.nginx.plist 2>/dev/null
        # Load it.
        sudo launchctl load -w /Library/LaunchDaemons/homebrew.mxcl.nginx.plist
    fi
}

install_appengine_launcher() {
    # We check for the existence of appengine in two ways; it's
    # possible to install appengine in ways that neither of these
    # pass, but it should cover the vast majority of cases.
    if [ ! -d /Applications/GoogleAppEngineLauncher.app ] && \
       ! which dev_appserver.py >/dev/null; then
        echo "Setting up App Engine Launcher"
        # TODO(csilvers): skip this step if it's already been done.
        curl -s http://googleappengine.googlecode.com/files/GoogleAppEngineLauncher-1.8.3.dmg \
            -o ~/Downloads/GoogleAppEngineLauncher-1.8.3.dmg
        hdiutil attach ~/Downloads/GoogleAppEngineLauncher-1.8.3.dmg
        cp -fr /Volumes/GoogleAppEngineLauncher-*/GoogleAppEngineLauncher.app \
            /Applications/
        hdiutil detach /Volumes/GoogleAppEngineLauncher-*

        echo "Set up the Google App Engine Launcher according to the website."
        open "https://sites.google.com/a/khanacademy.org/forge/for-khan-employees/-new-employees-onboard-doc/developer-setup/launching-your-test-site"
        open -a GoogleAppEngineLauncher

        read -p "Press enter to continue..."
    fi
}

install_phantomjs() {
    if brew ls phantomjs >/dev/null 2>&1; then
        # If phantomjs is already installed via brew, check if it is outdated
        if brew outdated | grep -q -e 'phantomjs'; then
            # If phantomjs is outdated, update it
            brew upgrade phantomjs 2>&1
        fi
    else
        # Otherwise, install via brew
        brew install phantomjs 2>&1
    fi
}

echo "Running Khan Installation Script 1.0"
echo "Warning: This is only tested on Mac OS 10.7 (Lion)"
echo "  After each statement, either something will open for you to"
echo "    interact with, or a script will run for you to use"
echo "  Press enter when a download/install is completed to go to"
echo "    the next step (including this one)"

read -p "Press enter to continue..."

# Run sudo once at the beginning to get the necessary permissions.
echo "This setup script needs your password to install things as root."
sudo sh -c 'echo Thanks'

update_path
register_ssh_keys
install_gcc
install_hipchat
install_homebrew
update_git
install_node
install_nginx
install_appengine_launcher
install_phantomjs

echo "You might be done! \n\n \
You should open a new shell to pick up any changes."