From 79fd078ae340da74dbc5111ad04e919d0951c5e9 Mon Sep 17 00:00:00 2001
From: mrdudz <mrdudz@users.noreply.github.com>
Date: Thu, 3 Nov 2022 18:27:10 +0100
Subject: [PATCH] add check for line endings containing CR.

---
 .github/checks/Makefile       |  7 +++++--
 .github/checks/lineendings.sh | 18 ++++++++++++++++++
 Contributing.md               |  4 ++++
 test/err/bug1890.c            | 18 +++++++++---------
 4 files changed, 36 insertions(+), 11 deletions(-)
 create mode 100755 .github/checks/lineendings.sh

diff --git a/.github/checks/Makefile b/.github/checks/Makefile
index 18cc153d4..6519eb5b8 100644
--- a/.github/checks/Makefile
+++ b/.github/checks/Makefile
@@ -1,7 +1,10 @@
 
-.PHONY: checkstyle tabs lastline spaces noexec
+.PHONY: checkstyle lineendings tabs lastline spaces noexec
 
-checkstyle: tabs lastline spaces noexec
+checkstyle: lineendings tabs lastline spaces noexec
+
+lineendings: lineendings.sh
+	@./lineendings.sh
 
 tabs: tabs.sh
 	@./tabs.sh
diff --git a/.github/checks/lineendings.sh b/.github/checks/lineendings.sh
new file mode 100755
index 000000000..5b445522f
--- /dev/null
+++ b/.github/checks/lineendings.sh
@@ -0,0 +1,18 @@
+#! /bin/bash
+OLDCWD=`pwd`
+SCRIPT_PATH=`dirname $0`
+CHECK_PATH=.
+
+cd $SCRIPT_PATH/../../
+
+FILES=`find $CHECK_PATH -type f \( -name \*.inc -o -name Makefile -o -name \*.cfg -o -name \*.\[chs\] -o -name \*.mac -o -name \*.asm -o -name \*.sgml \) -print | grep -v "libwrk/" | grep -v "testwrk/" | xargs grep -IUl $'\r'`
+
+cd $OLDCWD
+
+if [ x"$FILES"x != xx ]; then
+    echo "error: found CR in the following files:" >&2
+    for n in $FILES; do
+        echo $n >&2
+    done
+    exit -1
+fi
diff --git a/Contributing.md b/Contributing.md
index 3541979f6..e316b9c61 100644
--- a/Contributing.md
+++ b/Contributing.md
@@ -14,6 +14,10 @@ This document contains all kinds of information that you should know if you want
 
 ## All Sources
 
+### Line endings
+
+All files must only contain Unix style 'LF' line endings. Please configure your editors accordingly.
+
 ### TABs and spaces
 
 This is an ongoing controversial topic - everyone knows that. However, the following is how we do it :)
diff --git a/test/err/bug1890.c b/test/err/bug1890.c
index afe04f071..15d857cdb 100644
--- a/test/err/bug1890.c
+++ b/test/err/bug1890.c
@@ -1,9 +1,9 @@
-/* bug #1890 - Overflow in enumerator value is not detected */
-
-#include <limits.h>
-enum { a = ULONG_MAX, b } c = b;
-
-int main(void)
-{
-    return 0;
-}
+/* bug #1890 - Overflow in enumerator value is not detected */
+
+#include <limits.h>
+enum { a = ULONG_MAX, b } c = b;
+
+int main(void)
+{
+    return 0;
+}