Move sed invocation into its own function0.4.0

In test_diff() we are duplicating the sed invocation that strips config
files of anything irrelevant. Move that part of the functionality into
its own function.

1 files changed, 7 insertions, 2 deletions

diff --git a/kern b/kern
index 040d150..cdd2d8d 100755
--- a/kern
+++ b/kern
@@ -102,10 +102,15 @@ clean_kernel() {
 	sudo eclean-kernel -An3
 }
 
+strip_config() {
+	sed -nE '/^(# )?CONFIG_.*/p' "$1"
+}
+
 test_diff() {
 	dt=$(mktemp)
-	sed -nE '/^(# )?CONFIG_.*/p' "$(get_running_config)" > "$dt"
-	if ! sed -nE '/^(# )?CONFIG_.*/p' .config | diff -q "$dt" -; then
+	strip_config "$(get_running_config)" > "$dt"
+
+	if ! strip_config .config | diff -q "$dt" -; then
 		diff_kernel || true
 		printf "Continue? [y/N] "
 		read -r response