BASH script to upgrade a local (user-level) node.js installation automatically

node-upgrade.sh

#!/usr/bin/env bash

# check arguments
if [ $# -ne 1 ]; then
    echo "Usage: `basename $0` version" >&2
    exit 1
fi

VERSION=$1

echo "Upgrading to node.js $VERSION"

echo "Downloading node-v${VERSION}-darwin-x64.tar.gz"
cd "/Users/james/Downloads"
NODE_URL="http://nodejs.org/dist/v${VERSION}/node-v${VERSION}-darwin-x64.tar.gz"
curl $NODE_URL | tar xf -
if [ $? -ne 0 ]; then
  echo "Error downloading: $NODE_URL"
  exit 1
fi

echo "Moving package to local directory"
mv "./node-v${VERSION}-darwin-x64" "/Users/james/local/node-${VERSION}"
if [ $? -ne 0 ]; then
  echo "Error moving ./node-v${VERSION}-darwin-x64 to /Users/james/.node-${VERSION}"
  exit 1
fi

cd "/Users/james/local/node-${VERSION}"
if [ $? -ne 0 ]; then
  echo "Error changing working directory to /Users/james/local/node-${VERSION}"
  exit 1
fi

echo "Updating better coffescript path"
BETTER_COFFEESCRIPT="/Users/james/Library/Application Support/Sublime Text 3/Packages/User/CoffeeScript.sublime-settings"
sed -E -i'.bak' "s/node\-[0-9]+\.[0-9]+\.[0-9]+/node-$VERSION/g" "$BETTER_COFFEESCRIPT"
rm -f "$BETTER_COFFEESCRIPT.bak"

echo "Updating bash profile path"
BASH_PROFILE="/Users/james/.bash_profile"
sed -E -i'.bak' "s/node\-[0-9]+\.[0-9]+\.[0-9]+/node-$VERSION/g" "$BASH_PROFILE"
BASH_PROFILE_OLD="/Users/james/bash_profile.bak"
mv -f "$BASH_PROFILE.bak" "$BASH_PROFILE_OLD"
PROFILE_DIFFSTAT=`diff "$BASH_PROFILE" "$BASH_PROFILE_OLD" | diffstat -t | tail -n +2`
if [ "$PROFILE_DIFFSTAT" != "1,1,0,unknown" ]; then
  BASH_PROFILE_NEW="/Users/james/bash_profile.new"
  echo "Unexpected diffstat between $BASH_PROFILE and $BASH_PROFILE_NEW"
  echo "$PROFILE_DIFFSTAT"
  mv "$BASH_PROFILE" "$BASH_PROFILE_NEW"
  mv "$BASH_PROFILE_OLD" "$BASH_PROFILE"
  exit 1
fi
rm -f "$BASH_PROFILE_OLD"

echo "Installing global libraries"

PACKAGES=`npm -g list --depth=0 --parse`

# change path to new node root
export PATH=${PATH//$NODE_HOME\/bin?/}
rm -rf $NODE_HOME
export NODE_HOME="/Users/james/local/node-${VERSION}"
PATH=$NODE_HOME/bin:$PATH

echo "updating npm to latest version"
npm -g update npm

echo "cleaning cache"
npm cache clean

for DEP_PATH in $PACKAGES; do
  DEPENDENCY=`basename $DEP_PATH`
  if [ "$DEPENDENCY" != "lib" -a "$DEPENDENCY" != "npm" ]; then
    echo "Installing $DEPENDENCY"
    npm -g install $DEPENDENCY
  fi
done

echo "Done upgrading to node.js $VERSION"

exit 0