#!/bin/ksh
# vim: set ts=8 sts=8 sw=8 noet:

set -o errexit
set -o pipefail

function usage
{
	printf "Usage: $0 %s %s %s %s[...]\n" "<build_dir>" \
	    "<ctf_object_dir>" "<container_version>" "<program>" >&2
	exit 1
}

# Process input arguments:
BUILD_DIR="$1"
CTF_OBJECT_DIR="$2"
CONTAINER_VERSION="$3"
if [[ ! -d "${BUILD_DIR}" || -z "${CTF_OBJECT_DIR}" || \
    -z "${CONTAINER_VERSION}" ]]; then
	usage
fi
shift 3

# Process input program list:
if (( $# < 1 )); then
	usage
fi
PROGRAMS="$*"

# Read from environment:
if [[ -z "${DESTDIR}" ]]; then
	printf "Must set DESTDIR in the environment\n" >&2
	exit 1
fi

# These may contain wildcards, so expand:
CTFMERGE="$(echo $CTFMERGE)"
CTFCONVERT="$(echo $CTFCONVERT)"
if [[ ! -n "${CTFMERGE}" || ! -n "${CTFCONVERT}" ]]; then
	printf "You must set CTFMERGE and CTFCONVERT in the environment.\n" >&2
	exit 1
fi
if [[ ! -x "${CTFMERGE}" ]]; then
	printf "Could not find CTFMERGE at '%s'\n" "${CTFMERGE}" >&2
	exit 1
fi
if [[ ! -x "${CTFCONVERT}" ]]; then
	printf "Could not find CTFCONVERT at '%s'\n" "${CTFCONVERT}" >&2
	exit 1
fi

# Convert DWARF to CTF in every object file we can find:
rm -rf "${CTF_OBJECT_DIR}"
mkdir -p "${CTF_OBJECT_DIR}"
(cd "${BUILD_DIR}" && find * -name '*.o' -type f) | \
    sort | while read objf; do
	printf "  CTFCONVERT %s\n" "${objf}" >&2
	ctff="$(echo "$objf" | sed -e 's,/,%,g' -e 's/\.o$/\.ctf/')"
	${CTFCONVERT} -l "${CONTAINER_VERSION}" \
	    -o "${CTF_OBJECT_DIR}/${ctff}" \
	    "${BUILD_DIR}/${objf}"
done

# Merge the CTF into the set of programs we ship:
for program in ${PROGRAMS}; do
	program_path="${DESTDIR}${program}"
	printf "  CTFMERGE   %s\n" "${program_path}" >&2
	chmod u+w "${program_path}"
	${CTFMERGE} -l "${CONTAINER_VERSION}" \
	    -o "${program_path}" \
	    ${CTF_OBJECT_DIR}/*.ctf
done