yeoman installation script with Arch Linux support

install.sh

#!/bin/bash

# install.sh: Installation script

# Note for maintenance: edit the version variables below for easy updating :D
NODEVER=0.8.8
YEOMANVER="yeoman-yeoman-df0bc33fc4e1cf575f3e97ba28778a7838cfb7d1"

# checking OS
LINUX=0
MAC=0
PKGMGR=0

haveProg() {
    [ -x "$(which $1)" ]
}

if haveProg apt-get; then
  echo "You are using apt-get. I'll assume you have Linux with that."
  LINUX=1
  PKGMGR=1
elif haveProg yum; then
  echo "You are using yum. I'll assume you have Linux with that."
  LINUX=1
  PKGMGR=2
elif haveProg up2date; then
  echo "You are using up2date. I'll assume you have Linux with that."
  LINUX=1
  PKGMGR=3
elif haveProg pacman; then
  echo "You are using pacman. I'll assume you have Linux with that."
  if haveProg yaourt; then
    echo "Cool you also have yaourt."
  else
    echo "Installing yaourt"
    BACK="$PWD"
    cd /tmp/
    curl -L http://autoyaourt.googlecode.com/files/autoyaourt.sh | bash
    cd $BACK
  fi
  LINUX=1
  PKGMGR=4
else
  MAC=1
  PKGMGR=5
fi
echo ""

if [ "$MAC" -eq 1 ]; then
  echo "Installing on OS X."

  # check pre-installed ruby
  RUBYCHECK=$(ruby -e 'print RUBY_VERSION')

elif [ "$LINUX" -eq 1 ]; then
  echo "Installing on Linux."
  

else
  echo "Unable to determine install target OS! We currently support OS X and Linux."
  exit 1
fi

# brew installation
BREWFILE=$(which brew)

if [ "$MAC" -eq 1 ] && [ -z "$BREWFILE" ]; then
  echo "Installing Homebrew"
  echo -ne '\n' | curl -fsSkL raw.github.com/mxcl/homebrew/go | ruby
  echo ""
elif [ "$MAC" -eq 1 ] && [ "$BREWFILE" ]; then
  echo "You've got brew, nice work chap!"
fi

# checking baseline dependencies
CURLFILE=$(which curl)
RUBYFILE=$(which ruby)
NODEFILE=$(which node)
GEMFILE=$(which gem)
COMPASSFILE=$(which compass)
COMPASS=1

# check for curl
if [ -z "$CURLFILE" ]; then
  echo "Woah! I need curl to carry on, chap!"
  exit 1
fi

# sudo checks, don't try this at home, kids
NEEDSUDO=0
CHECKADMIN=$( ls -ld /usr/local/bin | grep "admin" )
CHECKROOT=$( ls -ld /usr/local/bin | grep "root" )
CHECKLINK=$( ls -ld /usr/local/ | grep "$USER" )

if [ "$CHECKADMIN" ]; then
  NEEDSUDO=1
elif [ "$CHECKROOT" ]; then
  NEEDSUDO=1
elif [ -z "$CHECKLINK" ]; then
  NEEDSUDO=1
elif [ -z "$RUBYFILE" ] && [ "$LINUX" -eq 1]; then
  NEEDSUDO=1
elif [ -z "$NODEFILE" ]; then
  NEEDSUDO=1
elif [-z "$COMPASSFILE" ]; then
  NEEDSUDO=1
fi

# packages to automatically be installed
PACKAGESMAC='git optipng jpeg-turbo phantomjs'
PACKAGESLINUX='optipng libjpeg-turbo8 phantomjs'
PACKAGESARCHLINUX='optipng libjpeg-turbo phantomjs'
DEBGIT='git-core'
OTHERGIT='git'


echo "                                                            "
echo "             .-:/+ossyhhhddddddddhhhysso+/:-.               "
echo "       ./oymNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNmho/.         "
echo "     .yNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNh'       "
echo "     -NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN-       "
echo "      dNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNd        "
echo "      +NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN+        "
echo "      .NNNNNNNNNNNNNNNNNNNdhyyyhmNNNNNNNNNNNNNNNNNN.        "
echo "       hNNNNNNNNNNNNNNNmssyhshshyoyNNNNNNNNNNNNNNNh         "
echo "       /NNNNNNNNNNNNNNd+ds++yhoooyy+NNNNNNNNNNNNNN/         "
echo "       'NNNNNNNNNNNNNN/do+hsosoys/hssNNNNNNNNNNNNm'         "
echo "        hNNNNNNNNNNNNN:N//d:hmooh+sh+NNNNNNNNNNNNy          "
echo "        /No---------+Nosh+oyyssyo/d+hm:--------yN:          "
echo "        'Ny          omssyy/ys/ssyohm:         dm           "
echo "    -----dN-----------+mmyssyyssshmd/---------:Nh-----      "
echo "   'dmmmmNNNNNNNNNNNNNNNNNNNmmmNNNNNNNNNNNNNNNNNNmmmmh      "
echo "    /NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN:      "
echo "    'yhhhhdNNdddddddddmNNNdhhhhhhhhhhhhhhhhhhhhhhhhhs       "
echo "          :Nm'''.:oso+:/smd:      '-/oso:.'                 "
echo "          'NN' /dNNNNNmo':Nm'    'smNNNNNd:                 "
echo "           hN/ .+hdmmho-  hN:     -sdmmdy/'                 "
echo "           /Nh    '.'     hN/        '.'                    "
echo "            mN-           hN/.'                             "
echo "            :Nd'          ymdddy'                           "
echo "             sNy'        '-:::::.'                          "
echo "              sNs'   ':ohdmNNyNNmdyo:'                      "
echo "               oNh--smNNNNNNd'dNNNNNNms-                    "
echo "                :mNNNNNNNNNh. .dNNNNNNNNy.                  "
echo "                :mNNNNNNNd/'   '+dNNNNNNNm-                 "
echo "               'ydmmmdmNms+:-..'  -+ydmmmds'                "
echo "                       ./oyhmmms                            "
echo "                                                            "
echo ""
echo ""
echo "                   Welcome to Yeoman! "
echo ""
echo ""
echo "We're going to check some dependencies and install them if they're not present"
echo ""
echo "Stand by..."
echo ""

# Some utility parts:
# 0. Sudo checks
# 1. Grab a temporary folder for us to operate in
# 2. Find a tar executable

#sudo checks
if [ "$NEEDSUDO" -eq 1 ]; then
  echo "Please authorize the installer:"
  sudo -v
fi

# set the temp dir
TMP="${TMPDIR}"
if [ "x$TMP" = "x" ]; then
  TMP="/tmp"
fi
TMP="${TMP}/yeoman.$$"
rm -rf "$TMP" || true
mkdir "$TMP"
if [ $? -ne 0 ]; then
  echo "Failed to mkdir $TMP" >&2
  exit 1
fi

# Check the user has tar installed.
tar="${TAR}"
if [ -z "$tar" ]; then
  tar="${npm_config_tar}"
fi
if [ -z "$tar" ]; then
  tar=`which tar 2>&1`
  ret=$?
fi
if [ $ret -eq 0 ] && [ -x "$tar" ]; then
  echo "tar=$tar"
  echo "Good gracious! You've got this version of 'tar' installed:"
  $tar --version
  ret=$?
fi
if [ $ret -eq 0 ]; then
  (exit 0)
else
  echo "No suitable tar program found."
  exit 1
fi

check_or_install_brew_pkg() {
  FILELOCATION=$(which $1)
  if [ "$FILELOCATION" ]; then
    echo "$1 is installed."
  else
    echo "Installing $1..."
    brew install $1
  fi
}

echo ""

# where will we return to?
BACK="$PWD"
cd "$TMP"

#check for and install ruby if needed
if [ -z "$RUBYFILE" ] && [ "$LINUX" -eq 1 ] && [ "$PKGMGR" -eq 1 ]; then
  echo "Installing Ruby"
  sudo apt-get -y install libruby1.9.1 ruby1.9.1 rubygems1.9.1
elif [ -z "$RUBYFILE" ] && [ "$LINUX" -eq 1 ] && [ "$PKGMGR" -eq 2 ]; then
  echo "Installing Ruby"
  sudo yum -y install ruby rubygems
elif [ -z "$RUBYFILE" ] && [ "$LINUX" -eq 1 ] && [ "$PKGMGR" -eq 4 ]; then
  echo "Installing Ruby"
  sudo pacman -S ruby rubygems
elif [ "$MAC" -eq 1 ] && [[ "$RUBYCHECK" < 1.8.7 ]]; then
  echo "Error you need to update your ruby version. Yeoman requires 1.8.7 or newer for it's use of compass."
  COMPASS=0
elif [ "$RUBYFILE" ]; then
  echo "Ruby is installed."
else
  echo "Unable to determine ruby configuration, skipping compass install."
  COMPASS=0
fi

echo ""

#ensure node is installed
if [ "$NODEFILE" ]; then
  echo "Node.js is installed."
else
  echo "Installing Node.js"
  if [ "$MAC" -eq 1 ]; then
    echo "Downloading Node.js for Mac."
    curl -O http://nodejs.org/dist/v$NODEVER/node-v$NODEVER.pkg
    echo "Node.js downloaded, starting installer."
    sudo installer -pkg node-v$NODEVER.pkg -target /
  elif [ "$LINUX" -eq 1 ]; then
    echo "Downloading Node.js for Linux."
    MACHINE_TYPE=`uname -m`
      if [ ${MACHINE_TYPE} == 'x86_64' ]; then
        curl -O http://nodejs.org/dist/v$NODEVER/node-v$NODEVER-linux-x64.tar.gz
        echo "installing Node.js for linux."
        tar xvfz node-v$NODEVER-linux-x64.tar.gz
        cd node-v$NODEVER-linux-x64
        sudo cp -r * /usr/local/
        cd ..
      else
        curl -O http://nodejs.org/dist/v$NODEVER/node-v$NODEVER-linux-x86.tar.gz
        echo "installing Node.js for linux."
        tar xvfz node-v$NODEVER-linux-x86.tar.gz
        cd node-v$NODEVER-linux-x86
        sudo cp -r * /usr/local/
        cd ..
      fi
  else
    echo "An error occurred installing Node.js"
    exit 1
  fi
fi

echo ""

#install the rest of the dependencies (MAC)
if [ "$MAC" -eq 1 ]; then
  echo "Installing dependencies for OS X."
  for package in $PACKAGESMAC
  do
    check_or_install_brew_pkg $package
  done
  if [ -z "$CHECKLINK" ]; then
    sudo chown -R $USER /usr/local
  fi
  brew link jpeg-turbo
fi

#install the rest of the dependencies (LINUX)
if [ "$LINUX" -eq 1 ]; then
  echo "Installing dependencies for Linux."
  echo "Installing $PACKAGESLINUX"
  if [ "$PKGMGR" -eq 1 ]; then
    sudo apt-get -y install $PACKAGESLINUX $DEBGIT
  elif [ "$PKGMGR" -eq 2 ]; then
    sudo yum -y install $PACKAGESLINUX $OTHERGIT
  elif [ "$PKGMGR" -eq 3 ]; then
    sudo up2date install $PACKAGESLINUX $OTHERGIT
  elif [ "$PKGMGR" -eq 4 ]; then
    yaourt -S $PACKAGESARCHLINUX $OTHERGIT
  fi
fi

#check for compass
echo ""
if [ "$COMPASSFILE" ]; then
  echo "Compass is already installed, you may want to 'gem install compass -pre' for the latest goodness."
elif [ "$COMPASS" -eq 0 ]; then
  echo "Ruby was not detected or is not configured correctly, skipping compass."
elif [ -z "$COMPASSFILE" ] && [ "$COMPASS" -eq 1 ]; then
  echo "Install compass for CSS magic."
  sudo gem install compass --pre
fi

#dependencies done. woo!
echo ""
echo "Now the dependencies are sorted let's grab the latest yeoman goodness"

#grab the latest yeoman tarball
curl https://dl.dropbox.com/u/39519/"$YEOMANVER".tar.gz | "$tar" -xz
cd "$YEOMANVER"

cd cli
#install yeoman as a global npm package
echo ""
echo "Alright buckaroo, hold on to your hats.."
echo "We're about to install the yeoman CLI, which will in turn install quite a few node modules"
echo "We're going to move fast, but once we're done, "
echo "you'll have the power of a thousand developers at your blinking cursor."
echo "Okay here we go..."

if [ "$NEEDSUDO" -eq 1 ]; then
  echo ""
  echo "You *may* be prompted now for your sudo password to kick off the npm install. Please hold."
  sudo npm install . -g
else
  npm install . -g
fi

echo ""
echo "Yah Hoo! Yeoman global is in place."
echo ""

# hop back to start and kill our temp folder off
cd "$BACK" && rm -rf "$TMP"

# Welcome wagon
echo ""
echo "My my, I hope you enjoyed that as much as I did."
echo "Yeoman and all its dependencies are now installed!"
echo ""
echo "Now that we've got our ducks in a row..."
echo "You should try starting a new project with yeoman."
echo "... might I suggest: "
echo "       mkdir myYeomanApp"
echo "       cd myYeomanApp   "
echo "       yeoman init      "
echo ""
echo "See you on the other side!"

if [ "$COMPASS" -eq 0 ]; then
  echo ""
  echo "Install hiccup: no compass"
  echo "Sorry chap, compass wasn't setup because there was a problem with your ruby setup. You can check the documentation here for help: [link to documentation]."
fi