From 0bf93137f6fd7164770d5fe6dc75857057afd0b5 Mon Sep 17 00:00:00 2001
From: Sebastian Falbesoner <sebastian.falbesoner@gmail.com>
Date: Sun, 10 May 2020 13:13:02 +0200
Subject: [PATCH] devtools/credit: check if tag exists first

Changelog-None
---
 devtools/credit | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/devtools/credit b/devtools/credit
index 4293de7f6..8b4dbea81 100755
--- a/devtools/credit
+++ b/devtools/credit
@@ -13,6 +13,10 @@ if [ "$#" != 1 ]; then
 fi
 PREV_TAG="$1"
 
+if [ -z $(git tag -l "$PREV_TAG") ]; then
+    echo "Error: couldn't find tag '$PREV_TAG'!"
+    exit 1
+fi
 git log "$PREV_TAG".. --format="%an|%ae" | sort | uniq -c | sort -rn > /tmp/authors.$$
 sed -n 's/.*[Nn]amed by //p' < CHANGELOG.md > /tmp/namers.$$
 git log "$PREV_TAG" --format="%an|%ae" | sort -u > /tmp/prev-authors.$$