Add new function expand_file() to allow file path expansion

Relies on Python os.path.expanduser and realpath from coreutils.

Bug: https://bugs.gentoo.org/412321
Signed-off-by: Thomas Deutschmann <whissi@gentoo.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/gen_funcs.sh b/gen_funcs.sh
index 95c8f30..ba45b02 100755
--- a/gen_funcs.sh
+++ b/gen_funcs.sh
@@ -538,6 +538,25 @@ check_distfiles() {
 	done
 }
 
+expand_file() {
+	[[ "$#" -lt '1' ]] &&
+		echo ''
+
+	local file="${1}"
+	local expanded_file=
+
+	expanded_file=$(python -c "import os; print(os.path.expanduser('${file}'))" 2>/dev/null)
+	if [ -z "${expanded_file}" ]
+	then
+		# if Python failed for some reason, just reset
+		expanded_file=${file}
+	fi
+
+	expanded_file=$(realpath -q "${expanded_file}" 2>/dev/null)
+
+	echo "${expanded_file}"
+}
+
 find_kernel_binary() {
 	local kernel_binary=$*
 	local curdir=$(pwd)