cache-apt-pkgs-action/lib.sh

164 lines
5.9 KiB
Bash
Executable file

#!/bin/bash
###############################################################################
# Execute the Debian install script.
# Arguments:
# Root directory to search from.
# File path to cached package archive.
# Installation script extension (preinst, postinst).
# Parameter to pass to the installation script.
# Returns:
# Filepath of the install script, otherwise an empty string.
###############################################################################
function execute_install_script {
local package_name=$(basename ${2} | awk -F\= '{print $1}')
local install_script_filepath=$(\
get_install_script_filepath "${1}" "${package_name}" "${3}")
if test ! -z "${install_script_filepath}"; then
log "- Executing ${install_script_filepath}..."
# Don't abort on errors; dpkg-trigger will error normally since it is
# outside its run environment.
sudo sh -x ${install_script_filepath} ${4} || true
log " done"
fi
}
###############################################################################
# Gets the Debian install script filepath.
# Arguments:
# Root directory to search from.
# Name of the unqualified package to search for.
# Extension of the installation script (preinst, postinst)
# Returns:
# Filepath of the script file, otherwise an empty string.
###############################################################################
function get_install_script_filepath {
# Filename includes arch (e.g. amd64).
local filepath="$(\
ls -1 ${1}var/lib/dpkg/info/${2}*.${3} 2> /dev/null \
| grep -E ${2}'(:.*)?.'${3} | head -1 || true)"
test "${filepath}" && echo "${filepath}"
}
###############################################################################
# Gets a list of installed packages from a Debian package installation log.
# Arguments:
# The filepath of the Debian install log.
# Returns:
# The list of colon delimited action syntax pairs with each pair equals
# delimited. <name>:<version> <name>:<version>...
###############################################################################
function get_installed_packages {
local install_log_filepath="${1}"
local regex="^Unpacking ([^ :]+)([^ ]+)? (\[[^ ]+\]\s)?\(([^ )]+)"
local dep_packages=""
while read -r line; do
# ${regex} should be unquoted since it isn't a literal.
if [[ "${line}" =~ ${regex} ]]; then
dep_packages="${dep_packages}${BASH_REMATCH[1]}=${BASH_REMATCH[4]} "
else
log_err "Unable to parse package name and version from \"${line}\""
exit 2
fi
done < <(grep "^Unpacking " ${install_log_filepath})
if test -n "${dep_packages}"; then
echo "${dep_packages:0:-1}" # Removing trailing space.
else
echo ""
fi
}
###############################################################################
# Splits a fully action syntax APT package into the name and version.
# Arguments:
# The action syntax colon delimited package pair or just the package name.
# Returns:
# The package name and version pair.
###############################################################################
function get_package_name_ver {
local ORIG_IFS="${IFS}"
IFS=\= read name ver <<< "${1}"
IFS="${ORIG_IFS}"
# If version not found in the fully qualified package value.
if test -z "${ver}"; then
ver="$(grep "Version:" <<< "$(apt-cache show ${name})" | awk '{print $2}')"
fi
echo "${name}" "${ver}"
}
###############################################################################
# Sorts given packages by name and split on commas and/or spaces.
# Arguments:
# The comma and/or space delimited list of packages.
# Returns:
# Sorted list of space delimited packages.
###############################################################################
function get_normalized_package_list {
# Remove commas, and block scalar folded backslashes.
local stripped=$(echo "${1}" | sed 's/[,\]/ /g')
# Remove extraneous spaces at the middle, beginning, and end.
local trimmed="$(\
echo "${stripped}" \
| sed 's/\s\+/ /g; s/^\s\+//g; s/\s\+$//g')"
echo ${trimmed} | tr ' ' '\n' | sort | tr '\n' ' '
}
###############################################################################
# Gets the relative filepath acceptable by Tar. Just removes the leading slash
# that Tar disallows.
# Arguments:
# Absolute filepath to archive.
# Returns:
# The relative filepath to archive.
###############################################################################
function get_tar_relpath {
local filepath=${1}
if test ${filepath:0:1} = "/"; then
echo "${filepath:1}"
else
echo "${filepath}"
fi
}
function log { echo "$(date +%H:%M:%S)" "${@}"; }
function log_err { >&2 echo "$(date +%H:%M:%S)" "${@}"; }
function log_empty_line { echo ""; }
###############################################################################
# Validates an argument to be of a boolean value.
# Arguments:
# Argument to validate.
# Variable name of the argument.
# Exit code if validation fails.
# Returns:
# Sorted list of space delimited packages.
###############################################################################
function validate_bool {
if test "${1}" != "true" -a "${1}" != "false"; then
log "aborted"
log "${2} value '${1}' must be either true or false (case sensitive)."
exit ${3}
fi
}
###############################################################################
# Writes the manifest to a specified file.
# Arguments:
# Type of manifest being written.
# List of packages being written to the file.
# File path of the manifest being written.
# Returns:
# Log lines from write.
###############################################################################
function write_manifest {
if [ ${#2} -eq 0 ]; then
log "Skipped ${1} manifest write. No packages to install."
else
log "Writing ${1} packages manifest to ${3}..."
# 0:-1 to remove trailing comma, delimit by newline and sort.
echo "${2:0:-1}" | tr ',' '\n' | sort > ${3}
log "done"
fi
}