cache-apt-pkgs-action/pre_cache_action.sh

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#!/bin/bash
set -e
# Include library.
script_dir="$(dirname -- "$(realpath -- "${0}")")"
source "${script_dir}/lib.sh"
# Debug mode for diagnosing issues.
# Setup first before other operations.
debug="${4}"
validate_bool "${debug}" debug 1
test ${debug} == "true" && set -x
# Directory that holds the cached packages.
cache_dir="${1}"
# Version of the cache to create or load.
version="${2}"
# Execute post-installation script.
execute_install_scripts="${3}"
# Debug mode for diagnosing issues.
debug="${4}"
# List of the packages to use.
input_packages="${@:5}"
# Trim commas, excess spaces, and sort.
log "Normalizing package list..."
packages="$(get_normalized_package_list "${input_packages}")"
log "done"
# Create cache directory so artifacts can be saved.
mkdir -p ${cache_dir}
log "Validating action arguments (version='${version}', packages='${packages}')...";
if grep -q " " <<< "${version}"; then
log "aborted"
log "Version value '${version}' cannot contain spaces." >&2
exit 2
fi
# Is length of string zero?
if test -z "${packages}"; then
log "aborted"
log "Packages argument cannot be empty." >&2
exit 3
fi
validate_bool "${execute_install_scripts}" execute_install_scripts 4
log "done"
log_empty_line
# Abort on any failure at this point.
set -e
log "Creating cache key..."
# Forces an update in cases where an accidental breaking change was introduced
# and a global cache reset is required, or change in cache action requiring reload.
force_update_inc="3"
value="${packages} @ ${version} ${force_update_inc}"
log "- Value to hash is '${value}'."
key="$(echo "${value}" | md5sum | cut -f1 -d' ')"
log "- Value hashed as '${key}'."
log "done"
key_filepath="${cache_dir}/cache_key.md5"
echo ${key} > ${key_filepath}
log "Hash value written to ${key_filepath}"