#!/bin/sh -efu
#
# debuginfo.prov - soname-based provides for *.debug files
#
# Written by Alexey Tourbin <at@altlinux.org>.  Based on lib.prov.
# License: GPLv2+.

. @RPMCONFIGDIR@/functions

dump_ld_config='@RPMCONFIGDIR@/dump_ld_config'

[ -n "${RPM_LIBDIR-}" ] || RPM_LIBDIR=`rpm --eval %_libdir`
[ -n "${RPM_LIB-}" ] || RPM_LIB=`rpm --eval %_lib`

DEF_RPM_FINDPROV_LIB_PATH="/$RPM_LIB $RPM_LIBDIR $("$dump_ld_config")"
[ -z "${RPM_BUILD_ROOT-}" ] ||
DEF_RPM_FINDPROV_LIB_PATH="$("$dump_ld_config" '' "$RPM_BUILD_ROOT") $DEF_RPM_FINDPROV_LIB_PATH"
DEF_RPM_FINDPROV_LIB_PATH="$(IFS="$IFS:"; echo '' $DEF_RPM_FINDPROV_LIB_PATH '')"
Debug "DEF_RPM_FINDPROV_LIB_PATH=$DEF_RPM_FINDPROV_LIB_PATH"

DebugInfoProv()
{
	local debugf="$1"
	local f="${debugf#${RPM_BUILD_ROOT-}/usr/lib/debug}"
	f="${RPM_BUILD_ROOT-}${f%.debug}"
	local fname="${f#${RPM_BUILD_ROOT-}}"
	local dir="${fname%/*}"
	local basename="${fname##*/}"

	# Check library location.
	[ -n "$dir" ] && [ -n "$basename" ] || return 0
	# Unlike lib.prov, we do only sonames under default path.
	# This is becuase we don't use ABI interface names for debuginfo
	# dependencies, and there is no need to provide bare file paths.
	[ -z "${DEF_RPM_FINDPROV_LIB_PATH##* $dir *}" ] || return 0

	# Obtain objdump info.
	local dump
	if ! dump=$(objdump -p "$f"); then
		Warning "$f: objdump failed"
		return 0
	fi

	local soname suffix debug
	soname=$(printf %s\\n "$dump" |sed -ne 's/^[[:space:]]*SONAME[[:space:]]\+\([^[:space:]]\+\)[[:space:]]*$/\1/p')
	suffix=$(printf %s\\n "$dump" |sed -ne 's/^.*file format \(elf64\).*$/(64bit)/p')
	[ -z "$suffix" ] && debug=debug || debug=debug64

	# For libraries with soname, ignore all but files named as soname.
	[ -z "$soname" ] || [ "$soname" = "$basename" ] || return 0

	# Treat symlinks specially.
	if [ -L "$f" ]; then
		[ -n "$soname" ] || return 0
		# Ignore symlinks leading out of buildroot.
		local realpath
		realpath=$(readlink -fv "$f")
		[ -z "${realpath##${RPM_BUILD_ROOT-}/*}" ] || return 0
		# Ignore symlinks to shorter locations.
		local realdir
		realdir=${realpath##${RPM_BUILD_ROOT-}}
		realdir=${realdir%/*}
		[ "${#dir}" -le "${#realdir}" ] || return 0
	fi

	# soname is either empty or equal to basename, so...
	soname=$basename

	printf '%s(%s)\n' "$debug" "$soname"
}

ArgvFileAction DebugInfoProv "$@"