1 files changed, 89 insertions, 0 deletions
diff --git a/src/find-libdeps.in b/src/find-libdeps.in
new file mode 100644
index 0000000..e1423b8
--- /dev/null
+++ b/src/find-libdeps.in
@@ -0,0 +1,89 @@
+#!/bin/bash
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+m4_include(lib/common.sh)
+
+set -e
+shopt -s extglob
+
+IGNORE_INTERNAL=0
+
+if [[ $1 = "--ignore-internal" ]]; then
+	IGNORE_INTERNAL=1
+	shift
+fi
+
+script_mode=${BASH_SOURCE[0]##*/find-lib}
+
+case $script_mode in
+	deps|provides) true;;
+	*) die "Unknown mode %s" "$script_mode" ;;
+esac
+
+if [[ -z $1 ]]; then
+	echo "${0##*/} [options] <package file|extracted package dir>"
+	echo "Options:"
+	echo "    --ignore-internal      ignore internal libraries"
+	exit 1
+fi
+
+if [[ -d $1 ]]; then
+	pushd "$1" >/dev/null
+else
+	setup_workdir
+
+	case ${script_mode} in
+		deps) bsdtar -C "$WORKDIR" -xf "$1";;
+		provides) bsdtar -C "$WORKDIR" -xf "$1" --include="*.so*";;
+	esac
+
+	pushd "$WORKDIR" >/dev/null
+fi
+
+process_sofile() {
+	# extract the library name: libfoo.so
+	soname="${sofile%.so?(+(.+([0-9])))}".so
+	# extract the major version: 1
+	soversion="${sofile##*\.so\.}"
+	if [[ "$soversion" = "$sofile" ]] && ((IGNORE_INTERNAL)); then
+		return
+	fi
+	if ! in_array "${soname}=${soversion}-${soarch}" "${soobjects[@]}"; then
+		# libfoo.so=1-64
+		echo "${soname}=${soversion}-${soarch}"
+		soobjects+=("${soname}=${soversion}-${soarch}")
+	fi
+}
+
+case $script_mode in
+	deps) find_args=(-perm -u+x);;
+	provides) find_args=(-name '*.so*');;
+esac
+
+find . -type f "${find_args[@]}" | while read -r filename; do
+	if [[ $script_mode = "provides" ]]; then
+		# ignore if we don't have a shared object
+		if ! LC_ALL=C readelf -h "$filename" 2>/dev/null | grep -q '.*Type:.*DYN (Shared object file).*'; then
+			continue
+		fi
+	fi
+
+	# get architecture of the file; if soarch is empty it's not an ELF binary
+	soarch=$(LC_ALL=C readelf -h "$filename" 2>/dev/null | sed -n 's/.*Class.*ELF\(32\|64\)/\1/p')
+	[[ -n $soarch ]] || continue
+
+	if [[ $script_mode = "provides" ]]; then
+		# get the string binaries link to: libfoo.so.1.2 -> libfoo.so.1
+		sofile=$(LC_ALL=C readelf -d "$filename" 2>/dev/null | sed -n 's/.*Library soname: \[\(.*\)\].*/\1/p')
+		[[ -z $sofile ]] && sofile="${filename##*/}"
+		process_sofile
+	elif [[ $script_mode = "deps" ]]; then
+		# process all libraries needed by the binary
+		for sofile in $(LC_ALL=C readelf -d "$filename" 2>/dev/null | sed -nr 's/.*Shared library: \[(.*)\].*/\1/p'); do
+			process_sofile
+		done
+	fi
+done
+
+popd >/dev/null