From 292e35c1d9db679446e46de5a283a88382de5518 Mon Sep 17 00:00:00 2001
From: Oliver Smith <osmith@sysmocom.de>
Date: Mon, 1 Mar 2021 08:45:47 +0100
Subject: [PATCH] kernel-test: verify REMOTE_NAME and URL

If the checked out git repository already has a remote with the name
KERNEL_REMOTE_NAME, make sure that the KERNEL_URL matches the remote
URL.

Motivation for this change is osmo-ci
I5d4202a67a24d9c15a5b211fa29ce9d5b5a9d9c1, which will expose the
parameters in the jenkins job.

Related: OS#3208
Change-Id: I18b29011e3e8e2577bdf1a9c64c4370309cc8399
---
 scripts/kernel-test/kernel-build.sh | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/scripts/kernel-test/kernel-build.sh b/scripts/kernel-test/kernel-build.sh
index d2610516..5f246ae1 100755
--- a/scripts/kernel-test/kernel-build.sh
+++ b/scripts/kernel-test/kernel-build.sh
@@ -9,6 +9,8 @@ KERNEL_DIR=/cache/linux
 
 # Add the kernel repository as git remote, fetch it, checkout the given branch
 prepare_git_repo() {
+	local url
+
 	if ! [ -d "$KERNEL_DIR" ]; then
 		mkdir -p "$KERNEL_DIR"
 		git -C "$KERNEL_DIR" init
@@ -18,6 +20,23 @@ prepare_git_repo() {
 
 	if ! git remote | grep -q "^$KERNEL_REMOTE_NAME$"; then
 		git remote add "$KERNEL_REMOTE_NAME" "$KERNEL_URL"
+	else
+		url="$(git remote get-url "$KERNEL_REMOTE_NAME")"
+		if [ "$url" != "$KERNEL_URL" ]; then
+			set +x
+			echo "ERROR: the checked out repository already has" \
+				"a remote with the same name, pointing to a" \
+				"different URL!"
+			echo
+			echo "KERNEL_REMOTE_NAME:       $KERNEL_REMOTE_NAME"
+			echo "KERNEL_URL (parameter):   $KERNEL_URL"
+			echo "KERNEL_URL (checked out): $url"
+			echo
+			echo "Please restart the job, and either change the" \
+				"KERNEL_URL parameter to the same value, or" \
+				"use a different KERNEL_REMOTE_NAME."
+			exit 1
+		fi
 	fi
 
 	git fetch "$KERNEL_REMOTE_NAME"