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#
# . ./build.vars and set -o errexit are assumed.
# See warning at the top of build.vars.
#
date() { command date +"${1:-${TIMESTAMP_FMT}}"; };
fetch_git() { [ -d ${1} ] && (cd ${1} && git pull origin main) || git clone ${3} ${2} ${1}; };
get_basename() { set -- $(get_name_without_slash ${1}); echo "${1##*/}"; };
get_var() { eval echo \${${1}}; }; # XXX
set_var() { eval ${1}=\"${2}\"; }; # XXX
get_name_without_slash() { while [ "x${1%/}" != "x${1}" ]; do set -- ${1%/}; done; echo ${1}; };
get_postfix_lrg() { echo "${1##*${2}}"; };
get_prefix_lrg() { echo "${1%%${2}*}"; };
get_postfix() { echo "${1#*${2}}"; };
get_prefix() { echo "${1%${2}*}"; };
match_any() { [ "x${1#*${2}*}" != "x${1}" ]; };
match_start() { [ "x${1#${2}}" != "x${1}" ]; };
push_IFS() { _IFS="${IFS}"; IFS="${1}"; };
pop_IFS() { IFS="${_IFS}"; unset _IFS; };
set_build_dir() { BUILD_DIR=${1}-${2}-${TARGET}; };
split() { push_IFS "${1}"; set -- ${2}; pop_IFS; echo "${*}"; };
unsplit() { push_IFS "${1}"; shift; set -- "${@}"; echo "${*}"; pop_IFS; };
rm_if_exists() {
set_flag_vars_from_args "$@"; shift ${_nshift:-0};
[ -d ${1} ] && rm -rf ${1}; [ -f ${1} ] && rm -f ${1};
[ ${_arg_m:-0} -eq 1 ] && mkdir ${1};
[ ${_arg_c:-0} -eq 1 ] && cd ${1};
unset_flag_vars_from_args;
};
set_flag_vars_from_args() {
unset _flag_vars _nshift;
while [ ${#} -gt 1 ]; do
if [ "x${1%[a-z]}" = "x-" ]; then
set_var _arg_${1#-} 1;
_flag_vars="${_flag_vars:+${_flag_vars} }_arg_${1#-}";
: $((_nshift+=1));
fi; shift;
done;
};
unset_flag_vars_from_args() {
set -- ${_flag_vars}; while [ ${#} -gt 0 ]; do
unset ${1}; shift; done; unset _flag_vars _nshift;
};
set_env_vars() {
_val_new="${1}"; shift;
while [ ${#} -gt 1 ]; do
[ -z "${_val_new}" ] && unset ${1} ||\
export "${1}=${_val_new}"; shift;
done; unset _val_new;
};
# Download GNU bash-style patch sets into ${2}-patches-extra and
# apply them to ${2} in the correct order.
apply_patches() {
(rm_if_exists -m -c ${2}-patches-extra;
wget -c -nd -np -r -R \*.htm\* -R \*.sig ${1};
for _patch_fname in \
$(find . -type f -not -iname \*.sig | sort); do
patch -b -d ../${2} -p0 \
< ${_patch_fname};
done; unset _patch_fname);
};
# Check whether all supplied arguments contain non-empty valid values.
check_path_vars() {
while [ ${#} -gt 0 ]; do
unset _val;
if [ -z "${_val:=$(get_var "${1}")}" ]; then
log_msg failexit "Error: variable \`${1}' is empty or unset.";
elif match_any "${_val}" " "; then
log_msg failexit "Error: variable \`${1}' contains one or more whitespace characters.";
else
shift;
fi;
done; unset _val;
};
# Check whether all supplied command names resolve.
check_prereqs() {
while [ ${#} -gt 0 ]; do
if ! command -v ${1} >/dev/null; then
log_msg failexit "Error: missing prerequisite command \`${1}'.";
fi; shift;
done;
};
# Clear the environment by unsetting each exported variable except
# for those named by the caller.
clear_env_with_except() {
_vfilter="${*}"; _unset_cmds="$(mktemp -q)";
export | while read _vspec; do
set -- ${_vspec}; shift;
if ! match_list "${_vfilter}" " " \
$(get_prefix_lrg ${1} =); then
echo unset $(get_prefix_lrg ${1} =) >> ${_unset_cmds};
fi;
done; . "${_unset_cmds}"; rm -f "${_unset_cmds}" 2>/dev/null;
unset _vfilter _vspec;
};
fetch() {
wget ${WGET_ARGS} ${1};
if [ ${#} -eq 2 ]; then
set -- $(get_basename ${1}) "$(compare_hash $(get_basename ${1}) ${2})" ${2};
if [ -n "${2}" ]; then
log_msg failexit "Error: hash mismatch for URL \`${1}' (is: ${2}, should be: ${3}.)";
fi;
fi;
};
compare_hash() {
# Push the output of dgst(1SSL) and the caller-supplied hash
# value to compare the former with on the pseudo-stack and
# shift off# all but the last two positional parameters.
# This corresponds to the hash output and caller-supplied
# hash values.
set -- $(openssl dgst -sha256 ${1}) ${2}; shift $((${#}-2));
[ "x${1}" = "x${2}" ] || echo "${1}";
};
compare_hash_manifest() {
while [ ${#} -gt 0 ]; do
if ! compare_hash ${1} ${2}; then
log_msg failexit "Error: hash mismatch for patch file \`${1}'.";
fi; shift;
done; return 0;
};
is_build_script_done() {
if [ -n "${ARG_BUILD_STEPS}" ]; then
if [ "${ARG_BUILD_STEPS}" = "finish" ]\
|| [ -z "${ARG_BUILD_STEPS#ALL}" ]; then
return 1; # Build
elif ! match_list ${ARG_BUILD_STEPS} , ${1}; then
return 0; # Skip
else
return 1; # Build
fi;
elif [ -f ${WORKDIR}/.${2:-$(get_basename ${SCRIPT_FNAME%.build})}.${1} ]; then
return 0; # Skip
else
return 1; # Build
fi;
};
set_build_script_done() {
_script_fname=${SCRIPT_FNAME##*/};
_done_fname=${WORKDIR}/.${_script_fname%.build};
while [ $# -ge 1 ]; do
if [ "x${1#-}" != "x${1}" ]; then
rm -f ${_done_fname}.${1#-};
else
touch ${_done_fname}.${1};
log_msg info "Finished build step ${1} of build script \`${_script_fname}'.";
fi; shift;
done;
unset _script_fname _done_fname;
};
log_env_vars() {
log_msg info "Variables for this build:";
while [ ${_nvar:=0} -lt ${#} ]; do
_arg="$(eval echo \${${_nvar}})"; _arg="${_arg%%=*}";
if [ ${#_arg} -gt ${_arg_len_max:=0} ]; then
_arg_len_max=${#_arg};
fi; : $((_nvar+=1));
done; unset _nvar _arg;
while [ ${#} -gt 0 ]; do
log_msg info "$(printf \
"%${_arg_len_max}.${_arg_len_max}s=%s" \
"${1%%=*}" "$(get_var ${1#*=})")";
shift;
done; unset _arg_len_max;
};
log_msg() {
_lvl=${1}; shift;
case ${_lvl} in
failexit) printf "\033[${LOG_MSG_FAIL_COLOUR}m"; ;;
fail) printf "\033[${LOG_MSG_FAIL_COLOUR}m"; ;;
info) printf "\033[${LOG_MSG_INFO_COLOUR}m"; ;;
succ) printf "\033[${LOG_MSG_SUCC_COLOUR}m"; ;;
esac;
if [ $# -gt 1 ]; then
printf "==> %s %s %s\033[0m\n" "$(date "${TIMESTAMP_FMT}")" "${1}" "$*";
else
printf "==> %s %s\033[0m\n" "$(date "${TIMESTAMP_FMT}")" "${1}";
fi; [ ${_lvl} = failexit ] && exit 1 || unset _lvl;
};
match_list() {
_cmp="${3}"; push_IFS "${2}"; set -- ${1}; pop_IFS;
while [ ${#} -gt 0 ]; do
if [ "x${1}" = "x${_cmp}" ]; then
unset _cmp; return 0;
fi; shift;
done; unset _cmp; return 1;
};
parse_args_into_vars() {
_arg0="${1}"; _args_valid="${2}"; shift 2;
while [ $# -gt 0 ]; do
case "${1}" in
--*) _aname="${1#--}";
if ! match_list "${_args_valid}" , "${_aname%%=*}"; then
log_msg failexit "Unknown parameter --${_aname%%=*} specified.";
elif match_start "${_aname}" "*="; then
_aval="$(get_postfix "${_aname}" =)";
_aname="$(get_prefix_lrg "${_aname}" =)";
else
_aval=1;
fi;
set_var $(echo arg_${_aname} | tr a-z- A-Z_) "${_aval}";
shift; ;;
*=*) set_var "$(get_prefix_lrg "${1}" =)"\
"$(get_postfix "${1}" =)"; shift; ;;
*) log_msg failexit "Invalid or unknown command line argument \`${1}'."; ;;
esac;
done; unset _arg0 _args_valid _aname _aval;
};
parse_with_pkg_name() {
PKG_NAME=${1}; shift;
while [ $# -ge 0 ]; do
if [ "x${PKG_NAME}" = "x${1}" ]; then
_pkg_NAME=$(echo "${PKG_NAME}" | tr a-z A-Z);
for _vname in ${PKG_VARS}; do
_vNAME=$(echo "${_vname}" | tr a-z A-Z);
if [ -n "${_vval:=$(get_var PKG_${_pkg_NAME}_${_vNAME})}" ]; then
export PKG_${_vNAME}="${_vval}";
if [ "x${_vname#[A-Z]}" != "x${_vname}" ]; then
export ${_vname}="${_vval}";
fi;
else
unset PKG_${_vNAME};
fi; unset _vval;
done; unset _pkg_NAME _vname _vNAME;
if [ -z "${PKG_URL}" ]; then
return 1;
else
[ -z "${PKG_FNAME}" ] && PKG_FNAME=${PKG_URL##*/};
[ -z "${PKG_SUBDIR}" ] && PKG_SUBDIR=${PKG_FNAME%%.tar*};
return 0;
fi;
fi; shift;
done; return 1;
};
# vim:filetype=sh
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