From ffa14815a005b71a45b79b38e40d1f470ac6d2fe Mon Sep 17 00:00:00 2001
From: Nick Vigilante <vigilante@cockroachlabs.com>
Date: Tue, 11 Oct 2022 15:04:33 +0000
Subject: [PATCH] diagrams: Diagrams job no longer fails when no diagrams
 change

If there are PRs that don't affect the diagrams or their related files,
the Publish SQL Grammar Diagrams job will fail, because `git commit`
produces a non-zero exit code if there are no files changed in the
working directory. This fixes that problem.

Release note: None

Fixes DOC-5642
---
 build/teamcity-diagram-generation.sh | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/build/teamcity-diagram-generation.sh b/build/teamcity-diagram-generation.sh
index d8d9eee29180..918f533d987b 100644
--- a/build/teamcity-diagram-generation.sh
+++ b/build/teamcity-diagram-generation.sh
@@ -34,6 +34,14 @@ tc_end_block "Generate Diagrams"
 tc_start_block "Push Diagrams to Git"
 cd generated-diagrams
 
+changed_diagrams=$(git status --porcelain)
+if [ -z "$changed_diagrams" ]
+then
+	echo "No diagrams changed. Exiting."
+  tc_end_block "Push Diagrams to Git"
+	exit 0
+fi
+
 git add .
 git commit -m "Snapshot $cockroach_ref"