ci/tools: add rustfmt to checkfmt and ci config

tools/checkpatch.sh

@@ -42,7 +42,28 @@ usage() {
   exit $@
 }
 
+is_rust_file() {
+  file_ext=${@##*.}
+  file_ext_r=${file_ext/R/r}
+  file_ext_rs=${file_ext_r/S/s}
+
+  if [ "$file_ext_rs" == "rs" ]; then
+    echo 1
+  else
+    echo 0
+  fi
+}
+
 check_file() {
+  if [ "$(is_rust_file $@)" == "1" ]; then
+    if ! command -v rustfmt &> /dev/null; then
+      fail=1
+    else
+      if ! rustfmt --edition 2021 --check $@ 2>&1; then
+        fail=1
+      fi
+    fi
+  else
     if ! $TOOLDIR/nxstyle $@ 2>&1; then
       fail=1
     fi
@@ -52,6 +73,7 @@ check_file() {
         fail=1
       fi
     fi
+  fi
 }
 
 check_ranges() {