German (#7315)

Co-authored-by: serprex <159546+serprex@users.noreply.github.com>

scripts/check-no-tabs.sh

@@ -1,9 +0,0 @@
-#!/bin/sh
-# Fail if any C/C++ source in soh/ outside soh/include contains a tab.
-
-cd "$(dirname "$0")/.." || exit 2
-
-if git --no-pager grep -n "$(printf '\t')" -- 'soh/*.c' 'soh/*.cpp' 'soh/*.h' 'soh/*.hpp' ':!soh/include'; then
-    echo "replace tabs with spaces"
-    exit 1
-fi

scripts/check-whitespace.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+# Fail if any C/C++ source in soh/ outside soh/include contains tabs or
+# trailing whitespace. Pass --fix to strip trailing whitespace in place
+# (tabs still need fixing by hand).
+
+cd "$(dirname "$0")/.." || exit 2
+
+# git grep over the checked sources, extra args go before the file list
+grep_sources() {
+    git --no-pager grep "$@" -- 'soh/*.c' 'soh/*.cpp' 'soh/*.h' 'soh/*.hpp' ':!soh/include'
+}
+
+if [ "$1" = "--fix" ]; then
+    grep_sources -lE '[[:space:]]+$' | xargs -r sed -i -E 's/[[:space:]]+$//'
+fi
+
+status=0
+if grep_sources -n "$(printf '\t')"; then
+    echo "replace tabs with spaces"
+    status=1
+fi
+if grep_sources -nE '[[:space:]]+$'; then
+    echo "remove trailing whitespace (or run with --fix)"
+    status=1
+fi
+exit $status