[ci] Stash changes made by the runner when checking if code needs reformatting

Author: shs96c

scripts/github-actions/ci-build.sh

@@ -4,10 +4,19 @@ set -eufo pipefail
 # We want to see what's going on
 set -x
 
+# The ruby version may have been set by the CI runner. Stash
+# changes while we check to see if we need to reformat the
+# code.
+git stash
+
 # Fail the build if the format script needs to be re-run
 ./scripts/format.sh
 git diff --exit-code
 
+# Now we're made it out, reapply changes made by the build
+# runner
+git stash apply
+
 # The NPM repository rule wants to write to the HOME directory
 # but that's configured for the remote build machines, so run
 # that repository rule first so that the subsequent remote