313 lines
8.0 KiB
Bash
Executable File
313 lines
8.0 KiB
Bash
Executable File
#!/bin/bash
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set -e
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VERSION="1.00"
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PROGRAM=$0
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PROGNAME="$(basename "${PROGRAM}")"
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MODIFIED_FILES=()
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CLEAN_DIR_LIST=(configs Documentation payloads spd src util)
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KEEP_FILES=(util/kconfig/)
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REQUIRED_MAKEFILES="util/testing\|util/crossgcc\|payloads/coreinfo\|payloads/nvramcui\|payloads/libpayload\|payloads/external/tint\|util/amdfwtool\|util/ectool\|util/futility\|util/intelmetool\|util/inteltool\|util/intelvbttool\|til/post\|util/superiotool"
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VERBOSE=
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# Text STYLE variables
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BOLD="\033[1m"
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RED='\033[38;5;9m'
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GREEN='\033[38;5;2m'
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NO_COLOR='\033[0m'
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################################################################################
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usage() {
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cat << EOF
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The ${PROGNAME} script is used to create a git patch that removes all files
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not used in a single build. It does this by creating a temporary directory
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and configuring it to show the last time a file was accessed. It then sets
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the time on all files back to midnight on 2021-01-01 and then does a full
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build. Because all Kconfig and Makefiles are accessed during the built,
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it then creates a new Kconfig file containing all of the old Kconfigs.
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The next step is to delete all of the files that have an access time still
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set to 2021. The final step of the cleaning process is to recursively remove
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any Makefile that is alone in a directory by itself. The script then makes
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a commit and creates a patch.
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Usage: ${PROGNAME} [options]
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Options:
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-b | --blddir <dir> Set /tmp/<dir> as the build directory
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-h | --help Print usage and exit
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-D | --debug Print debug information. Use -DD to show all commands
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-V | --version Print the version and exit
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--nocolor Don't print color codes
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EOF
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}
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_echo_color() {
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local color="$1"
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local text="$2"
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local newline="$3"
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if [[ ${newline} == "0" ]]; then
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printf "${color}%s${NO_COLOR}" "${text}"
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else
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printf "${color}%s${NO_COLOR}\n" "${text}"
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fi
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}
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_echo_error() {
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_echo_color "${RED}" "$*" 1 >&2
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}
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show_version() {
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echo
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_echo_color "${BOLD}${GREEN}" "${PROGNAME} version ${VERSION}"
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echo
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}
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get_args() {
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if ! args="$(getopt -l version,help,debug,nocolor,blddir: -o b:DhV -- "$@")"; then
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usage
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exit 1
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fi
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eval set -- "${args}"
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while true; do
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case "$1" in
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-b | --blddir)
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shift
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BLD_DIR="/tmp/$1"
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;;
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-D | --debug)
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# -d prints extra debug info
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# -dd prints all script steps
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if [ -n "${VERBOSE}" ]; then
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set -x
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else
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VERBOSE="V=1"
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fi
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;;
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-h | --help)
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usage
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exit 0
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;;
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--nocolor)
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BOLD=""
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RED=""
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GREEN=""
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NO_COLOR=""
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;;
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-V | --version) exit 0 ;;
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--)
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shift
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break
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;;
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*)
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_echo_error "Unknown argument '$1'"
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usage
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exit 1
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;;
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esac
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shift
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done
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if [[ -n $1 ]]; then
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_echo_error "Unknown command '$1'"
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usage
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exit 1
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fi
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BLD_DIR="${BLD_DIR:-$(mktemp -d)}"
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}
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recursively_rm_dir_onlyfile() {
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local dir=$1
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local beforecount
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local aftercount
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while true; do
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if [[ ! -d ${dir} ]]; then
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break
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fi
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beforecount="$(find "${dir}" | wc -l)"
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while read -r file; do
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# Don't delete any of the makefiles required for building.
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if echo "${file}" | grep -q "${REQUIRED_MAKEFILES}"; then
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break
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fi
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# Remove the directory if a makefile is the only file present.
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if [[ "$(cd "${file}" && find . -maxdepth 1 | grep -v "./Makefile")" == "." ]]; then
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rm -rf "${file}"
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fi
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done < <(find "${dir}" -depth -type d)
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if [[ ! -d ${dir} ]]; then
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break
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fi
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find "${dir}" -type d -empty -delete
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if [[ ! -d ${dir} ]]; then
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break
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fi
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aftercount="$(find "${dir}" | wc -l)"
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if [[ ${aftercount} -eq ${beforecount} ]]; then
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break
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fi
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done
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}
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verify_atime_enabled() {
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local testfile
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# Make sure the build directory is mounted correctly
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if [ ! -d "${BLD_DIR}" ]; then
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mkdir "${BLD_DIR}"
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fi
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if ! grep -q "${BLD_DIR}" /proc/mounts; then
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echo "Mounting the ${BLD_DIR} directory with atime enabled"
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sudo mount -t tmpfs -o rw,relatime tmpfs "${BLD_DIR}"
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elif ! grep "${BLD_DIR}" /proc/mounts | grep -q relatime; then
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echo "Remounting the ${BLD_DIR} directory with relatime enabled"
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sudo mount -o remount,relatime "${BLD_DIR}"
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fi
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testfile="$(mktemp -p "${BLD_DIR}")"
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touch -a --date="2020-01-01 00:00:00" "${testfile}"
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if ! stat "${testfile}" | grep -q "Access: 2020-01-01"; then
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_echo_error "Error: could not set access time."
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sudo umount "${BLD_DIR}"
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rm -rf "${BLD_DIR}"
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exit 1
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fi
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rm -f "${testfile}"
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}
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update_codebase() {
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local tempconfig
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tempconfig="$(mktemp)"
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if [ ! -f "${BLD_DIR}/COPYING" ]; then
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echo "Downloading coreboot tree"
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git clone https://review.coreboot.org/coreboot.git "${BLD_DIR}"
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make -C "${BLD_DIR}" build/xcompile
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fi
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# Start from a completely clean tree or we'll miss anything that
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# doesn't need to be rebuilt. Save the config if it exists.
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if [[ -f .config ]]; then
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mv .config "${tempconfig}"
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fi
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_echo_color "${GREEN}" "Cleaning coreboot tree"
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make -s -C "${BLD_DIR}" distclean
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if [[ -f ${tempconfig} ]]; then
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mv "${tempconfig}" .config
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fi
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# force a refresh of all submodules
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_echo_color "${GREEN}" "Refreshing all submodules..."
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git submodule update --recursive --remote --init --checkout
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}
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save_kconfig() (
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cd "${BLD_DIR}" && util/lint/kconfig_lint -w -p -o kconfig.tmp
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)
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update_times() {
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_echo_color "${GREEN}" "Updating access time of all files"
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git ls-files | xargs touch -a -m -t 202001010000
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if ! stat "${BLD_DIR}/COPYING" | grep -q "Access: 2020-01-01"; then
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_echo_error "Error: could not set access time."
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_echo_error " One of the following processes may be accessing it."
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fuser -uvm "${BLD_DIR}/COPYING"
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exit 1
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fi
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}
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mark_files_to_keep() {
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for file in "${KEEP_FILES[@]}"; do
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find "${BLD_DIR}/${file}" -depth -exec touch {} \;
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done
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}
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build_platform() {
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local extra_text="$1"
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_echo_color "${GREEN}" "Building platform ${extra_text}"
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if [[ ! -f "${BLD_DIR}/.config" ]]; then
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if [[ -n ${CONFIG_FILE} ]]; then
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cp "${CONFIG_FILE}" "${BLD_DIR}/.config"
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fi
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echo "CONFIG_PAYLOAD_NONE=y" >>"${BLD_DIR}/.config"
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fi
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make -C "${BLD_DIR}" -s clean UPDATED_SUBMODULES=1 BUILD_TIMELESS=1
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make -C "${BLD_DIR}" -s olddefconfig
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make -C "${BLD_DIR}" -s UPDATED_SUBMODULES=1 BUILD_TIMELESS=1 ${VERBOSE}
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HASH="$(sha256sum build/coreboot.rom)"
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make -C "${BLD_DIR}" -s clean UPDATED_SUBMODULES=1 BUILD_TIMELESS=1
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}
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show_modified() {
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readarray MODIFIED_FILES < <(find "${BLD_DIR}" -atime -1 -type f -path ./.git -prune)
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echo "Files changed: ${#MODIFIED_FILES[@]}"
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}
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remove_kconfigs() {
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# Dump all Kconfigs into a single file so that directories
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# can be removed, while maintaining the entire Kconfig
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# structure.
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find "${BLD_DIR}/src" -name 'Kconfig*' -delete
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mv "${BLD_DIR}/kconfig.tmp" "${BLD_DIR}/src/Kconfig"
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}
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remove_unused() {
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local dir
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# Most files can be removed simply by looking at the time, but
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# all Kconfig and Makefiles in the entire tree are accessed
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# whether they're used or not.
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remove_kconfigs
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echo
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_echo_color "${GREEN}" "Checking access time and removing unused files in:"
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for dir in "${CLEAN_DIR_LIST[@]}"; do
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printf "%s\n" "${BLD_DIR}/${dir}"
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# find and remove all files without updated times.
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find "${BLD_DIR}/${dir}" -atime +5 -type f -delete
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recursively_rm_dir_onlyfile "${BLD_DIR}/${dir}"
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done
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printf "\n\n"
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}
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create_patch() {
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_echo_color "${GREEN}" "Creating patch"
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(
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cd "${BLD_DIR}"
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git add -A
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git commit -m "remove unused files" --no-verify
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git format-patch HEAD^
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)
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}
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main() {
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show_version
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get_args "$@"
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verify_atime_enabled
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update_codebase
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save_kconfig
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update_times
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mark_files_to_keep
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build_platform "to mark used files"
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OLDHASH="${HASH}"
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HASH=""
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#show_modified
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remove_unused
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create_patch
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build_platform "to verify the build still works"
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NEWHASH="${HASH}"
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echo
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_echo_color "${GREEN}" "Checksums:"
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echo "Old: ${OLDHASH}"
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echo "New: ${NEWHASH}"
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}
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main "$@"
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