Simple Bash script that repackages and copies Unity 3d 5 packages to a Munki repo

make_unity_pkgs.sh

#!/bin/bash -eu

# This script takes a directory containing flat packages. It expands
# them all, uses `xmlstarlet` to edit pkg-info 'version' attribute
# to the one given by VERSION, and flattens them back, saving them
# as "pkgname-VERSION.pkg"

# Use the Unity download assistant to download the packages in a VM
# to avoid actually installing them by accident on the machine, and
# then run this script. Currently we download:
# - Unity
# - Standard Assets
# - Example Project
# - Documentation
# - WebGL Build Support
#
# TODO: one outstanding issue is that if the name has dashes, like the WebGL or iOS (and possibly
# other) build targets components, Munki won't be able to process those items. Currently I'm
# manually stripping out the dashes from the name, i.e. UnityPro5_UnitySetupWebGLSupportforEditor5
# but we should be doing this as we build the munkiimport '--name' flag.

VERSION=5.5.0f3
MUNKI_SUBDIR=apps/Unity

# clean any existing pkgs in the cwd
rm -f ./*.pkg

pkgsdir="${1}"
tmpdir=$(mktemp -d)
for pkg in ${pkgsdir}/*.pkg; do
    pkg_file_name=$(basename "${pkg}")
    OLDIFS=$IFS
    IFS=. components=(${pkg_file_name})
    IFS=$OLDIFS
    pkgutil --expand "${pkg}" "${tmpdir}/${pkg_file_name}"
    echo "Expanded to ${tmpdir}/${pkg_file_name}"
    pkginfo=$(find "${tmpdir}/${pkg_file_name}" -name "*PackageInfo*")
    pkg_id=$(xmlstarlet sel -t -v "/pkg-info/@identifier" "${pkginfo}")
    echo "Found package identifier $pkg_id"
    xmlstarlet edit --inplace --update \
        '/pkg-info/@version' \
        --value "${VERSION}" \
        "${pkginfo}"

    dist="${tmpdir}/${pkg_file_name}/Distribution"
    xmlstarlet edit --inplace --update \
        '/installer-gui-script/pkg-ref[@id='\""${pkg_id}"\"' and @version="0"]/@version' \
        --value "${VERSION}" \
        "${dist}"

    output_pkg_file="${components[0]}-${VERSION}.pkg"
    pkgutil --flatten "${tmpdir}/${pkg_file_name}" "${output_pkg_file}"
    rm -rf "${tmpdir:?}/${pkg_file_name}"

    cmd="munkiimport --nointeractive --subdirectory ${MUNKI_SUBDIR} "
    if [ "${components[0]}" == "Unity" ]; then
        cmd="${cmd} --name UnityPro5 "
    else
        cmd="${cmd} --name UnityPro5_${components[0]} --update-for UnityPro5 "
    fi
    cmd="${cmd} ${output_pkg_file}"
    echo "Running command: ${cmd}"
    ${cmd}
done