misc: migrate from GNU indent to clang-format

Type: make
Change-Id: I085dcd6fe826da14d456f84a23355310bdc5d1e9
Signed-off-by: Damjan Marion <damarion@cisco.com>

extras/scripts/checkstyle.sh

@@ -0,0 +1,90 @@
+#!/bin/bash
+
+# Copyright (c) 2020 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eEo pipefail
+
+CLANG_FORMAT_VER=10
+GIT_DIFF_ARGS="-U0 --no-color --relative HEAD~1"
+CLANG_FORMAT_DIFF_ARGS="-style file -p1"
+SUFFIX="-${CLANG_FORMAT_VER}"
+
+clang-format${SUFFIX} --version
+
+in=$(mktemp)
+git diff ${GIT_DIFF_ARGS} > ${in}
+
+line_count=$(sed -n '/^+.*\*INDENT-O[NF][F]\{0,1\}\*/p' ${in} | wc -l)
+if [ ${line_count} -gt 0 ] ; then
+    echo
+    sed -n '/^+++ /{h}; /^+.*\*INDENT-O[NF][F]\{0,1\}\*/{x;p;x;p;}' ${in}
+    echo
+    echo "*******************************************************************"
+    echo "* CHECKSTYLE FAILED"
+    echo "* Please remove INDENT-ON and INDENT-OFF from modified lines."
+    echo "*******************************************************************"
+    rm ${in}
+    exit 1
+fi
+
+if [ "${1}" == "--fix" ]; then
+  cat ${in} | clang-format-diff${SUFFIX} ${CLANG_FORMAT_DIFF_ARGS} -i
+  filelist=$(sed -n 's/^+++ b\/\(.*\.[ch]\)/\1/p' ${in})
+  git status ${filelist}
+  rm ${in}
+  exit 0
+fi
+
+line_count=$(sed -n '/^+.*\s\+$/p' ${in} | wc -l)
+if [ ${line_count} -gt 0 ] ; then
+    echo
+    sed -n '/^+++/h; /^+.*\s\+$/{x;p;x;p;}' ${in}
+    echo
+    echo "*******************************************************************"
+    echo "* CHECKSTYLE FAILED"
+    echo "* Trailing whitespace detected"
+    echo "*******************************************************************"
+    rm ${in}
+    exit 1
+fi
+
+out=$(mktemp)
+
+cat ${in} | clang-format-diff${SUFFIX} ${CLANG_FORMAT_DIFF_ARGS} > ${out}
+rm ${in}
+
+line_count=$(cat ${out} | wc -l)
+
+if [ -t 1 ] && [ -n $(tput colors) ] && [ $(tput colors) -ge 1 ] && \
+   command -v highlight &> /dev/null ; then
+  highlight --syntax diff -O ansi ${out}
+else
+  cat ${out}
+fi
+
+rm ${out}
+
+if [ ${line_count} -gt 0 ] ; then
+    echo "*******************************************************************"
+    echo "* CHECKSTYLE FAILED"
+    echo "* CONSULT DIFF ABOVE"
+    echo "* NOTE: Running 'extras/scripts/checkstyle.sh --fix' *MAY* fix the issue"
+    echo "*******************************************************************"
+    exit 1
+else
+    echo "*******************************************************************"
+    echo "* CHECKSTYLE SUCCESSFULLY COMPLETED"
+    echo "*******************************************************************"
+    exit 0
+fi