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#!/usr/bin/env bash
#
# @license Apache-2.0
#
# Copyright (c) 2017 The Stdlib Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Build script to run before performing install steps during Travis CI build [lifecycle][1].
#
# [1]: https://docs.travis-ci.com/user/customizing-the-build#The-Build-Lifecycle
# VARIABLES #
# Define the command for `node`:
if [[ -z "${NODE}" ]]; then
cmd=node
else
cmd="${NODE}"
fi
# Determine the script directory:
dir=$(dirname "$0")
# Define the path to an executable for determining npm version compatibility:
node_npm_version="${dir}/node_npm_compatibility"
# Determine a compatible npm version range:
version=$("${cmd}" "${node_npm_version}")
# FUNCTIONS #
# Defines an error handler.
on_error() {
echo 'ERROR: An error was encountered during execution.' >&2
exit 1
}
# Updates the npm client.
#
# $1 - acceptable version range
update_npm() {
echo "Updating npm: ${version}." >&2
# Must wrap the version range in quotes to ensure range treated as a single string:
npm install -g npm@"$1"
}
# Main execution sequence.
main() {
# Update npm. Older clients cannot, e.g., handle scoped modules.
update_npm "${version}"
}
# Set an error handler:
trap 'on_error' ERR
# Run main:
main
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