script to safely upgrade starcluster & dependencies

upgrade_starcluster.sh

#!/usr/bin/env bash
# upgrade starcluster
####
mute_run ()
{
  $* >/dev/null 2>&1
}

cecho ()
{
  local _c=$1; shift
  echo -e "$(tput setaf $_c )$@$(tput sgr0)"
}

err ()
{
  cecho 1 "$@"
}

tabecho ()
{
  perl -sne '$|=1; print "[$pp]\t$_"' -- -pp="$1"
}

is_installed_pip ()
{
  pip list 2>&1 | grep -q "$1"
}

####
# actual code
####
STARCLUSTER_DEPS=(ecdsa iso8601)
CRYPTO_DEPS=(scp boto)
OTHER_PKGS=(pycrypto markupsafe)


# test whether or not we need to sudo
USE_SUDO=""
which pip | grep -Eq -e 'Users|home' ||
  { USE_SUDO="sudo"; cecho 3 "\t- using sudo"; } && cecho 3 "\t- using venv";

# test for PIP being at the correct version/upgrade pip
cecho 2 "upgrading PIP and testing for features"
$USE_SUDO easy_install --upgrade pip | tabecho "easy_install"

if [ $? -ne 0 ]; then
  err "PIP upgrade failed. Sorry"
  exit 2;
fi

mute_run "pip uninstall --help"
if [ $? -ne 0 ]; then
  err "PIP does not have correct features. Exiting"
  exit 2;
fi

if pip --version; then
  echo "pip"
else
  err "what"
  exit 22;
fi

if pip list | grep -E starcluster; then
  yes | pip uninstall starcluster
  $USE_SUDO rm -f $pip_loc
fi

# uninstall all of the dependencies
cecho 2 "uninstalling all dependencies"
for pkg in ${STARCLUSTER_DEPS[@]}; do
  is_installed_pip $pkg && yes | pip uninstall $pkg | tabecho "uninstall"
done

for pkg in ${CRYPTO_DEPS[@]}; do
  is_installed_pip $pkg && yes | pip uninstall $pkg | tabecho "uninstall"
done

for pkg in ${OTHER_PKGS[@]}; do
  is_installed_pip $pkg && yes | pip uninstall $pkg | tabecho "uninstall"
done

cecho 2 "starcluster uninstalled. Successfully"

cecho 2 "installing starcluster dependencies"
for dep in ${STARCLUSTER_DEPS[@]}; do
  $USE_SUDO pip install $dep | tabecho "pip-$dep"
  if [ $? -ne 0 ]; then
    err "unable to install $dep."
    exit 2;
  fi
done

if pip --version; then
  echo "pip"
else
  err "what"
  exit 22;
fi

cecho 2 "installing pycrypto with compiler flags"
ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future \
  $USE_SUDO pip install pycrypto | tabecho "pip-pycrypto"

ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future \
  $USE_SUDO pip install MarkupSafe | tabecho "pip-markupsafe"

if [ $? -ne 0 ]; then
  err "error installing pycrypto!"
  exit 2;
fi

for dep in ${CRYPTO_DEPS[@]}; do
  $USE_SUDO pip install $dep | tabecho "pip-$dep"
  if [ $? -ne 0 ]; then
    err "error installing $dep"
    exit 2;
  fi
done

# now we can install starcluster
cecho 2 "installing starcluster"
$USE_SUDO pip install -U starcluster | tabecho "pip-starcluster"

if [ $? -ne 0 ]; then
  err "error installing starcluster"
  exit 2;
fi

cecho 2 "validating version and command..."
if starcluster --version 2>&1 | grep -q '0.95'; then
  cecho 2 "- starcluster is at correct version"
fi

Nice script. Thanks!
There is still a point of potential failure which you may want to cater for (I am a victim myself):
If you have the python-crypto-2.0.1 RPM installed system-wide, and you didn't have gmp-devel installed when you built & installed a later version of PyCrypto, so you'reusing a newer version of PyCrypto with an older version of _fastmath.
To solve it you need to install gmp-devel, uninstall PyCrypto and re-install PyCrypto.