From ed5091b16f9530364b64772343cf15ff9236443c Mon Sep 17 00:00:00 2001
From: Pawel Wieczorkiewicz <wipawel@amazon.de>
Date: Sat, 10 Aug 2019 13:46:47 +0000
Subject: [PATCH] kpatch-build: Check if /etc/os-release exists

Not every distro out there supports /etc/os-release file.
This file is useful for obtaining given distro defaults, but not
essential for the script to work (when all parameters are passed
on a command line).

To avoid warnings or unwanted errors, make sourcing of this file
conditional.

Signed-off-by: Pawel Wieczorkiewicz <wipawel@amazon.de>
---
 kpatch-build/kpatch-build | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kpatch-build/kpatch-build b/kpatch-build/kpatch-build
index 02aa4ec..e695eea 100755
--- a/kpatch-build/kpatch-build
+++ b/kpatch-build/kpatch-build
@@ -46,6 +46,7 @@ RPMTOPDIR="$CACHEDIR/buildroot"
 VERSIONFILE="$CACHEDIR/version"
 TEMPDIR="$CACHEDIR/tmp"
 LOGFILE="$CACHEDIR/build.log"
+RELEASE_FILE=/etc/os-release
 DEBUG=0
 SKIPCLEANUP=0
 SKIPGCCCHECK=0
@@ -569,8 +570,8 @@ fi
 [[ -z "$TARGETS" ]] && TARGETS="vmlinux modules"
 
 # Don't check external file.
-# shellcheck disable=SC1091
-source /etc/os-release
+# shellcheck disable=SC1090
+[[ -f "$RELEASE_FILE" ]] && source "$RELEASE_FILE"
 DISTRO="$ID"
 if [[ "$DISTRO" = fedora ]] || [[ "$DISTRO" = rhel ]] || [[ "$DISTRO" = ol ]] || [[ "$DISTRO" = centos ]]; then
 	[[ -z "$VMLINUX" ]] && VMLINUX="/usr/lib/debug/lib/modules/$ARCHVERSION/vmlinux"