scripts: add script to format codebase using clang-format

Signed-off-by: Antonio Cardace <acardace@redhat.com>

contrib/scripts/nm-code-format.sh

@@ -0,0 +1,72 @@
+#!/bin/bash
+
+set -e
+
+while (( $# )); do
+    case $1 in
+        -i)
+            FLAGS="-i"
+            shift
+            ;;
+        -h)
+            printf "Usage: %s [OPTION]... [FILE]...\n" $(basename $0)
+            printf "Reformat source files using NetworkManager's code-style.\n\n"
+            printf "If no file is given the script runs on the whole codebase.\n"
+            printf "If no flag is given no file is touch but errors are reported.\n\n"
+            printf "OPTIONS:\n"
+            printf "    -i    Reformat files\n"
+            printf "    -h    Print this help message\n"
+            exit 0
+            ;;
+        *)
+            FILES+=($1)
+            shift
+            ;;
+    esac
+done
+
+NM_ROOT=$(git rev-parse --show-toplevel)
+EXCLUDE=":(exclude)shared/systemd
+         :(exclude)src/systemd
+         :(exclude)shared/n-dhcp4
+         :(exclude)shared/c-list
+         :(exclude)shared/c-list
+         :(exclude)shared/c-list
+         :(exclude)shared/c-rbtree
+         :(exclude)shared/c-siphash
+         :(exclude)shared/c-stdaux
+         :(exclude)shared/n-acd"
+
+if ! which clang-format &> /dev/null; then
+    echo -n "Error: clang-format is not installed, "
+    echo "on RHEL/Fedora/CentOS run 'dnf install clang-tools-extra'"
+    exit 1
+fi
+
+if [ ! -f ${NM_ROOT}/.clang-format ]; then
+    echo "Error: the clang-format file does not exist"
+    exit 1
+fi
+
+
+FLAGS=${FLAGS:-"--Werror -n --ferror-limit=1"}
+
+if [ -z "${FILES[@]}" ]; then
+    cd $NM_ROOT
+    FILES=($(git ls-files --full-name -- '*.[ch]' ${EXCLUDE}))
+fi
+
+for f in "${FILES[@]}"; do
+    if [ -f $f ]; then
+        if ! clang-format $FLAGS $f &> /dev/null; then
+            TMP_FILE=$(mktemp)
+            clang-format $f > $TMP_FILE
+            git --no-pager diff $f $TMP_FILE || true
+            rm $TMP_FILE
+            echo "Error: $f code-style is wrong, fix it by running '$(basename $0) -i'"
+            exit 1
+        fi
+   else
+        echo "Error: $f No such file"
+   fi
+done