assets.sh

#!/usr/bin/env bash
#
# MIT License
#
# (C) Copyright 2022 Hewlett Packard Enterprise Development LP
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#

set -exo pipefail

# usage: cmd_retry <cmd> <arg1> ...
#
# Run the specified command until it passes or until it fails too many times
function cmd_retry
{
    local -i attempt
    # For now I'm hard coding these values, but it would be easy to make them into function
    # arguments in the future, if desired
    local -i max_attempts=10
    local -i sleep_time=12
    attempt=1
    while [ true ]; do
        # We redirect to stderr just in case the output of this command is being piped
        echo "Attempt #$attempt to run: $*" 1>&2
        if "$@" ; then
            return 0
        elif [ $attempt -lt $max_attempts ]; then
           echo "Sleeping ${sleep_time} seconds before retry" 1>&2
           sleep ${sleep_time}
           attempt=$(($attempt + 1))
           continue
        fi
        echo "ERROR: Unable to get $url even after retries" 1>&2
        return 1
    done
    echo "PROGRAMMING LOGIC ERROR: This line should never be reached" 1>&2
    exit 1
}

if [ -z "${ARTIFACTORY_USER}" -o -z "${ARTIFACTORY_TOKEN}"]; then
    echo "Missing authentication information for image download. Please set ARTIFACTORY_USER and ARTIFACTORY_TOKEN environment variables."
    exit 1
fi
# Verify assets exist
for url in "${APPLICATION_ASSETS[@]}"; do cmd_retry curl -sfSLI -u "${ARTIFACTORY_USER}:${ARTIFACTORY_TOKEN}" "$url"; done
cmd_retry curl -sfSLI "$HPE_SIGNING_KEY"