#!/bin/sh -efu
#
# brp-debuginfo - generate /usr/lib/debug and /usr/src/debug contents
# for debuginfo packages
#
# Written by Alexey Tourbin <at@altlinux.org>.  Based on find-debuginfo.sh
# by Jeff Johnson <jbj@rpm5.org> and Roland McGrath <roland@redhat.com>.
# License: GPLv2+.

. @RPMCONFIGDIR@/functions
ValidateBuildRoot

cd "$RPM_BUILD_ROOT"

rm -rf .tmp
mkdir .tmp

# Strip binaries, create .debug files under /usr/lib/debug and install sources into /usr/src/debug.
prune_paths='-path ./usr/share -o -path ./lib/firmware -o -path ./usr/lib/debug'
find . '(' -path './.*' -o $prune_paths ')' -prune -o -type f -print |
file -NF$'\t' -f - |sed -n 's/\t.* ELF .* \(executable\|shared object\), .*, not stripped.*//p' |
xargs -r --delimiter='\n' stat -c '%h %i %n' |
while read -r nlink ino f; do
	debugf=./usr/lib/debug${f#.}.debug
	mkdir -p "${debugf%/*}"
	if [ "$nlink" -gt 1 ]; then
		eval f0="\${f0_$ino-}"
		if [ -n "$f0" ]; then
			ln -nf "$f0" "$debugf"
			mkdir -p .debuginfo/src/"${debugf%/*}"
			ln -nf .debuginfo/src/"$f0" .debuginfo/src/"$debugf"
			continue
		else
			eval f0_$ino="\$f"
		fi
	fi
	touch -r "$f" .tmp/stamp
	@RPMCONFIGDIR@/debugedit -b "$RPM_BUILD_DIR" -d /usr/src/debug -l .tmp/src "$f"
	eu-strip --remove-comment -f "$debugf" "$f"
	touch -r .tmp/stamp  "$debugf" "$f"
	chmod 644 "$debugf"
	mkdir -p .debuginfo/src/"${debugf%/*}"
	awk 'BEGIN{RS="\0";ORS="\n"}{print}' .tmp/src |LC_ALL=C sort -u |
	while read -r src; do
		[ -f "$RPM_BUILD_DIR"/"$src" ] || continue
		[ -f ./usr/src/debug/"$src" ] ||
		install -pD -m644 "$RPM_BUILD_DIR"/"$src" ./usr/src/debug/"$src"
		printf '%s\n' /usr/src/debug/"$src"
	done >.debuginfo/src/"$debugf"
	rm .tmp/src
done

# Make symbolic links that mimic the original tree.
find . '(' -path './.*' -o $prune_paths ')' -prune -o -type l -print |
while read -r l; do
	f=$(readlink -vm "$l")
	f=${f#$RPM_BUILD_ROOT}
	debugf=./usr/lib/debug$f.debug
	[ -f "$debugf" ] || continue
	debugl=./usr/lib/debug${l#.}.debug
	mkdir -p "${debugl%/*}"
	ln -snf "$(relative "${debugf#.}" "${debugl#.}")" "$debugl"
	mkdir -p .debuginfo/links/"${debugf%/*}"
	printf '%s\n' "${debugl#.}" >>.debuginfo/links/"$debugf"
done