npm-postinstall.sh

#!/bin/sh
shDownloadAndInstall() {
    # this function will download and install phantomjs and slimerjs
    if [ ! -f $FILE_BIN ]
    then
        # check if unzip is installed
        if ! (unzip > /dev/null 2>&1)
        then
            printf "ERROR - phantomjs-lite requires 'unzip' to install\n" 1>&2 || return $?
            return 1
        fi
        # download phantomjs
        if [ ! -f $FILE_TMP.downloaded ]
        then
            printf "downloading $FILE_URL to $FILE_TMP ...\n" || return $?
            mkdir -p $TMPDIR2 && curl -Ls -o $FILE_TMP $FILE_URL || return $?
            touch $FILE_TMP.downloaded || return $?
        fi
        # unzip phantomjs
        $FILE_UNZIP $FILE_TMP || return $?
    fi
    # install phantomjs
    rm -f $FILE_LINK && ln -s $FILE_BIN $FILE_LINK || return $?
}

shNpmPostinstall() {
    # this function will run npm postinstall
    TMPDIR2=/tmp/$USER
    case $(uname) in
    Darwin)
        # download and install phantomjs
        FILE_BIN=phantomjs-1.9.8-macosx/bin/phantomjs
        FILE_LINK=phantomjs
        FILE_TMP=$TMPDIR2/phantomjs-1.9.8-macosx.zip
        FILE_URL=https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-1.9.8-macosx.zip
        FILE_UNZIP="unzip -q"
        shDownloadAndInstall || return $?
        # download and install slimerjs
        FILE_BIN=slimerjs-0.9.6/slimerjs
        FILE_LINK=slimerjs
        FILE_TMP=$TMPDIR2/slimerjs-0.9.6.zip
        FILE_URL=https://download.slimerjs.org/releases/0.9.6/slimerjs-0.9.6.zip
        FILE_UNZIP="unzip -q"
        shDownloadAndInstall || return $?
        ;;
    Linux)
        # download and install phantomjs
        FILE_BIN=phantomjs-1.9.8-linux-x86_64/bin/phantomjs
        FILE_LINK=phantomjs
        FILE_TMP=$TMPDIR2/phantomjs-1.9.8-linux-x86_64.tar.bz2
        FILE_URL=https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-1.9.8-linux-x86_64.tar.bz2
        FILE_UNZIP="tar -xjf"
        shDownloadAndInstall || return $?
        # download and install slimerjs
        FILE_BIN=slimerjs-0.9.6/slimerjs
        FILE_LINK=slimerjs
        FILE_TMP=$TMPDIR2/slimerjs-0.9.6.zip
        FILE_URL=https://download.slimerjs.org/releases/0.9.6/slimerjs-0.9.6.zip
        FILE_UNZIP="unzip -q"
        shDownloadAndInstall || return $?
        ;;
    esac
}

# run npm postinstall
shNpmPostinstall