node.sh

#!/bin/bash

# Discussion, issues and change requests at:
#   https://github.com/nodesource/distributions
#
# Script to install the NodeSource Node.js v4.x LTS Argon repo onto an
# Enterprise Linux or Fedora Core based system.
#
# Run as root or insert `sudo -E` before `bash`:
#
# curl -sL https://rpm.nodesource.com/setup_4.x | bash -
#   or
# wget -qO- https://rpm.nodesource.com/setup_4.x | bash -
#

SCRSUFFIX="_4.x"
NODENAME="Node.js v4.x LTS Argon"
NODEREPO="pub_4.x"
NODEPKG="nodejs"

print_status() {
  local outp=$(echo "$1") # | sed -r 's/\\n/\\n## /mg')
  echo
  echo -e "## ${outp}"
  echo
}

if test -t 1; then # if terminal
    ncolors=$(which tput > /dev/null && tput colors) # supports color
    if test -n "$ncolors" && test $ncolors -ge 8; then
        termcols=$(tput cols)
        bold="$(tput bold)"
        underline="$(tput smul)"
        standout="$(tput smso)"
        normal="$(tput sgr0)"
        black="$(tput setaf 0)"
        red="$(tput setaf 1)"
        green="$(tput setaf 2)"
        yellow="$(tput setaf 3)"
        blue="$(tput setaf 4)"
        magenta="$(tput setaf 5)"
        cyan="$(tput setaf 6)"
        white="$(tput setaf 7)"
    fi
fi

print_bold() {
    title="$1"
    text="$2"

    echo
    echo "${red}================================================================================${normal}"
    echo "${red}================================================================================${normal}"
    echo
    echo -e "  ${bold}${yellow}${title}${normal}"
    echo
    echo -en "  ${text}"
    echo
    echo "${red}================================================================================${normal}"
    echo "${red}================================================================================${normal}"
}

bail() {
  echo 'Error executing command, exiting'
  exit 1
}

exec_cmd_nobail() {
  echo "+ $1"
  bash -c "$1"
}

exec_cmd() {
  exec_cmd_nobail "$1" || bail
}

node_deprecation_warning() {
echo "X${NODENAME} == XNode.js v5.x"
    if [[ "X${NODENAME}" == "Xio.js v1.x" ||
          "X${NODENAME}" == "Xio.js v2.x" ||
          "X${NODENAME}" == "Xio.js v3.x" ||
          "X${NODENAME}" == "XNode.js v5.x" ]]; then

        print_bold \
"                            DEPRECATION WARNING                            " "\
${bold}${NODENAME} is no longer actively supported!${normal}

  ${bold}You will not receive security or critical stability updates${normal} for this version.

  You should migrate to a supported version of Node.js as soon as possible.
  Use the installation script that corresponds to the version of Node.js you
  wish to install. e.g.

   * ${green}https://rpm.nodesource.com/setup_4.x — Node.js v4 LTS \"Argon\"${normal} (recommended)
   * ${green}https://rpm.nodesource.com/setup_6.x — Node.js v6 Current${normal}

  Please see ${bold}https://github.com/nodejs/LTS/${normal} for details about which version
  may be appropriate for you.

  The ${bold}NodeSource${normal} Node.js Linux distributions GitHub repository contains
  information about which versions of Node.js and which Linux distributions
  are supported and how to use the install scripts.
    ${bold}https://github.com/nodesource/distributions${normal}
"
        echo
        echo "Continuing in 10 seconds ..."
        echo
        sleep 10

    elif [ "X${NODENAME}" == "XNode.js v0.10" ]; then

        print_bold \
"                     NODE.JS v0.10 DEPRECATION WARNING                      " "\
Node.js v0.10 will cease to be actively supported in ${bold}October 2016${normal}.

  This means you will not continue to receive security or critical stability
  updates for this version of Node.js beyond that time.

  You should begin migration to a newer version of Node.js as soon as
  possible. Use the installation script that corresponds to the version of
  Node.js you wish to install. e.g.

   * ${green}https://rpm.nodesource.com/setup_4.x — Node.js v4 LTS \"Argon\"${normal} (recommended)
   * ${green}https://rpm.nodesource.com/setup_6.x — Node.js v6 Current${normal}

  Please see ${bold}https://github.com/nodejs/LTS/${normal} for details about which version
  may be appropriate for you.

  The ${bold}NodeSource${normal} Node.js Linux distributions GitHub repository contains
  information about which versions of Node.js and which Linux distributions
  are supported and how to use the install scripts.
    ${bold}https://github.com/nodesource/distributions${normal}
"

        echo
        echo "Continuing in 5 seconds ..."
        echo
        sleep 5

    elif [ "X${NODENAME}" == "XNode.js v0.12" ]; then

        print_bold \
"                     NODE.JS v0.12 DEPRECATION WARNING                      " "\
Node.js v0.12 will cease to be actively supported ${bold}at the end of 2016${normal}.

  This means you will not continue to receive security or critical stability
  updates for this version of Node.js beyond that time.

  You should begin migration to a newer version of Node.js as soon as
  possible. Use the installation script that corresponds to the version of
  Node.js you wish to install. e.g.

   * ${green}https://rpm.nodesource.com/setup_4.x — Node.js v4 LTS \"Argon\"${normal} (recommended)
   * ${green}https://rpm.nodesource.com/setup_6.x — Node.js v6 Current${normal}

  Please see ${bold}https://github.com/nodejs/LTS/${normal} for details about which version
  may be appropriate for you.

  The ${bold}NodeSource${normal} Node.js Linux distributions GitHub repository contains
  information about which versions of Node.js and which Linux distributions
  are supported and how to use the install scripts.
    ${bold}https://github.com/nodesource/distributions${normal}
"

        echo
        echo "Continuing in 3 seconds ..."
        echo
        sleep 3

    fi
}

script_deprecation_warning() {
    if [ "X${SCRSUFFIX}" == "X" ]; then
        print_bold \
"                         SCRIPT DEPRECATION WARNING                         " "\
This script, located at ${bold}https://rpm.nodesource.com/setup${normal}, used to
  install Node.js v0.10, is being deprecated and will eventually be made
  inactive.

  You should use the script that corresponds to the version of Node.js you
  wish to install. e.g.

   * ${green}https://rpm.nodesource.com/setup_4.x — Node.js v4 LTS \"Argon\"${normal} (recommended)
   * ${green}https://rpm.nodesource.com/setup_6.x — Node.js v6 Current${normal}

  Please see ${bold}https://github.com/nodejs/LTS/${normal} for details about which version
  may be appropriate for you.

  The ${bold}NodeSource${normal} Node.js Linux distributions GitHub repository contains
  information about which versions of Node.js and which Linux distributions
  are supported and how to use the install scripts.
    ${bold}https://github.com/nodesource/distributions${normal}
"

        echo
        echo "Continuing in 10 seconds (press Ctrl-C to abort) ..."
        echo
        sleep 10
    fi
}

setup() {

script_deprecation_warning

print_status "Installing the NodeSource ${NODENAME} repo..."

print_status "Inspecting system..."

if [ ! -x /bin/rpm ]; then
  print_status "\
You don't appear to be running an Enterprise Linux based \
system, please contact NodeSource at \
https://github.com/nodesource/distributions/issues if you think this \
is incorrect or would like your distribution to be considered for \
support.\
"
  exit 1
fi

## Annotated section for auto extraction in test.sh
#-check-distro-#

## Check distro and arch
echo "+ rpm -q --whatprovides redhat-release || rpm -q --whatprovides centos-release || rpm -q --whatprovides cloudlinux-release || rpm -q --whatprovides sl-release"
DISTRO_PKG=$(rpm -q --whatprovides redhat-release || rpm -q --whatprovides centos-release || rpm -q --whatprovides cloudlinux-release || rpm -q --whatprovides sl-release)
echo "+ uname -m"
UNAME_ARCH=$(uname -m)


if [ "X${UNAME_ARCH}" == "Xi686" ]; then
  DIST_ARCH=i386
elif [ "X${UNAME_ARCH}" == "Xx86_64" ]; then
  DIST_ARCH=x86_64
else

  print_status "\
You don't appear to be running a supported machine architecture: ${UNAME_ARCH}. \
Please contact NodeSource at \
https://github.com/nodesource/distributions/issues if you think this is \
incorrect or would like your architecture to be considered for support. \
"
  exit 1

fi

if [[ $DISTRO_PKG =~ ^(redhat|centos|cloudlinux|sl)- ]]; then
    DIST_TYPE=el
elif [[ $DISTRO_PKG =~ ^system-release- ]]; then # Amazon Linux
    DIST_TYPE=el
elif [[ $DISTRO_PKG =~ ^(fedora|korora)- ]]; then
    DIST_TYPE=fc
else

  print_status "\
You don't appear to be running a supported version of Enterprise Linux. \
Please contact NodeSource at \
https://github.com/nodesource/distributions/issues if you think this is \
incorrect or would like your architecture to be considered for support. \
Include your 'distribution package' name: ${DISTRO_PKG}. \
"
  exit 1

fi

if [[ $DISTRO_PKG =~ ^system-release-201[4-9]\. ]]; then  #NOTE: not really future-proof

  # Amazon Linux, for 2014.* use el7, older versions are unknown, perhaps el6
  DIST_VERSION=7

else

  ## Using the redhat-release-server-X, centos-release-X, etc. pattern
  ## extract the major version number of the distro
  DIST_VERSION=$(echo $DISTRO_PKG | sed -r 's/^[[:alpha:]]+-release(-server|-workstation|-client)?-([0-9]+).*$/\2/')

  if ! [[ $DIST_VERSION =~ ^[0-9][0-9]?$ ]]; then

    print_status "\
Could not determine your distribution version, you may not be running a \
supported version of Enterprise Linux. \
Please contact NodeSource at \
https://github.com/nodesource/distributions/issues if you think this is \
incorrect. Include your 'distribution package' name: ${DISTRO_PKG}. \
"
    exit 1

  fi

fi


## Given the distro, version and arch, construct the url for
## the appropriate nodesource-release package (it's noarch but
## we include the arch in the directory tree anyway)
RELEASE_URL_VERSION_STRING="${DIST_TYPE}${DIST_VERSION}"
RELEASE_URL="https://rpm.nodesource.com/pub_4.x/fc/24/nodesource-release-fc24-1.noarch.rpm"

#-check-distro-#

print_status "Confirming \"${DIST_TYPE}${DIST_VERSION}-${DIST_ARCH}\" is supported..."

## Simple fetch & fast-fail to see if the nodesource-release
## file exists for this distro/version/arch
exec_cmd_nobail "curl -sLf -o /dev/null '${RELEASE_URL}'"
RC=$?

if [[ $RC != 0 ]]; then
    print_status "\
Your distribution, identified as \"${DISTRO_PKG}\", \
is not currently supported, please contact NodeSource at \
https://github.com/nodesource/distributions/issues \
if you think this is incorrect or would like your distribution to be considered for support"
    exit 1
fi

## EPEL is needed for EL5, we don't install it if it's missing but
## we can give guidance
if [ "$DIST_TYPE" == "el" ] && [ "$DIST_VERSION" == "5" ]; then

  print_status "Checking if EPEL is enabled..."

  echo "+ yum repolist enabled 2> /dev/null | grep epel"
  repolist=$(yum repolist enabled 2> /dev/null | grep epel)

  if [ "X${repolist}" == "X" ]; then
    print_status "Finding current EPEL release RPM..."

    ## We can scrape the html to find the latest epel-release (likely 5.4)
    epel_url="http://dl.fedoraproject.org/pub/epel/5/${DIST_ARCH}/"
    epel_release_view="${epel_url}repoview/epel-release.html"
    echo "+ curl -s $epel_release_view | grep -oE 'epel-release-[0-9\-]+\.noarch\.rpm'"
    epel=$(curl -s $epel_release_view | grep -oE 'epel-release-[0-9\-]+\.noarch\.rpm')
    if [ "X${epel}" = "X" ]; then
      print_status "Error: Could not find current EPEL release RPM!"
      exit 1
    fi

    print_status "\
The EPEL (Extra Packages for Enterprise Linux) repository is a\n\
prerequisite for installing Node.js on your operating system. Please\n\
add it and re-run this setup script.\n\
\n\
The EPEL repository RPM is available at:\n\
  ${epel_url}${epel}\n\
You can try installing with: \`rpm -ivh <url>\`\
"

    exit 1
  fi

fi

print_status "Downloading release setup RPM..."

## Two-step process to install the nodesource-release RPM,
## Download to a tmp file then install it directly with `rpm`.
## We don't rely on RPM's ability to fetch from HTTPS directly
echo "+ mktemp"
RPM_TMP=$(mktemp || bail)

exec_cmd "curl -sL -o '${RPM_TMP}' '${RELEASE_URL}'"

print_status "Installing release setup RPM..."

## --nosignature because nodesource-release contains the signature!
exec_cmd "rpm -i --nosignature --force '${RPM_TMP}'"

print_status "Cleaning up..."

exec_cmd "rm -f '${RPM_TMP}'"

print_status "Checking for existing installations..."

## Nasty consequences if you have an existing Node or npm package
## installed, need to inform if they are there
echo "+ rpm -qa 'node|npm' | grep -v nodesource"
EXISTING_NODE=$(rpm -qa 'node|npm|iojs' | grep -v nodesource)

if [ "X${EXISTING_NODE}" != "X" ]; then

  print_status "\
Your system appears to already have Node.js installed from an alternative source.\n\
Run \`\033[1myum remove -y ${NODEPKG} npm\033[22m\` (as root) to remove these first.\
"

fi

node_deprecation_warning

print_status "\
Run \`\033[1myum install -y ${NODEPKG}\033[22m\` (as root) to install ${NODENAME} and npm.\n\
You may also need development tools to build native addons:\n\
  \`yum install -y gcc-c++ make\`\
"

## Alternative to install dev tools: `yum groupinstall 'Development Tools'

exit 0

}

## Defer setup until we have the complete script
setup