#!/bin/sh

die () { echo "$@" ; exit 1; }

\. ../../nvm.sh

set -ex

# Compiling io.js requires a period toolchain: python 2 (its `configure`),
# and gcc <= 5 (its bundled V8). CI compiles it for real in a gcc:4.9
# container job; on modern toolchains, this can only be skipped
# (`install version specified in .nvmrc from fake source` covers nvm's
# source pipeline everywhere).
GCC_MAJOR="$(gcc -dumpversion 2>/dev/null | command cut -d. -f1)"
if ! command -v python2 >/dev/null 2>&1 && ! python -V 2>&1 | command grep -q '^Python 2'; then
  echo 'python 2 is not available; skipping the io.js source install'
  exit 0
fi
case "${GCC_MAJOR}" in
  '' | *[!0-9]*) echo 'gcc is not available; skipping the io.js source install'; exit 0 ;;
esac
if [ "${GCC_MAJOR}" -gt 5 ]; then
  echo "gcc <= 5 is required to compile io.js, got ${GCC_MAJOR}; skipping the io.js source install"
  exit 0
fi

NVM_TEST_VERSION='v3.3.0'
NVM_PREFIXED_TEST_VERSION="iojs-${NVM_TEST_VERSION}"

# Remove the stuff we're clobbering.
nvm uninstall "${NVM_TEST_VERSION}" || echo 'not installed'

# Install from source, with the version specified in .nvmrc
echo "${NVM_PREFIXED_TEST_VERSION}" > .nvmrc

nvm install -s || die "'nvm install -s' failed"

# Check
nvm_is_version_installed "${NVM_PREFIXED_TEST_VERSION}" || die 'version is not installed'
nvm run --silent "${NVM_PREFIXED_TEST_VERSION}" --version | grep "${NVM_TEST_VERSION}" \
  || die "'nvm run ${NVM_PREFIXED_TEST_VERSION} --version | grep ${NVM_TEST_VERSION}' failed"