[Feature][Master] Clang-format tool to perform additional formatting and semantic checking of code.

.clang-format

@@ -0,0 +1,40 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+---
+Language: Cpp
+BasedOnStyle: Google
+ColumnLimit: 100
+AlignConsecutiveAssignments: true
+AlignConsecutiveDeclarations: false
+AlignConsecutiveMacros: true
+DerivePointerAlignment: false
+SortIncludes: true
+MaxEmptyLinesToKeep: 1
+PointerAlignment: Left
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: Empty
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: true
+AlwaysBreakTemplateDeclarations: true
+BinPackArguments: false
+BinPackParameters: false
+SortIncludes: false

.github/workflows/greetings.yml

@@ -7,6 +7,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/first-interaction@v1
+      env:
+        GITHUB_PR_BASE_SHA: ${{ github.event.pull_request.base.sha }}
+        GITHUB_PR_RUN_ID: ${{ github.run_id }}
+        GITHUB_PR_BASE_REF: ${{ github.event.pull_request.base.ref }} 
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
         issue-message: |

LICENSE

@@ -353,3 +353,10 @@
     =======================================================================================
 
     docs/python_docs/themes/mx-theme/mxtheme/static/webfonts/ (Copy of the License available at licenses/OFL1_1)
+
+    =======================================================================================
+    Apache-2.0 WITH LLVM-exception
+    =======================================================================================
+
+    tools/lint/git-clang-format-13
+

ci/docker/runtime_functions.sh

@@ -701,6 +701,7 @@ build_ubuntu_gpu_large_tensor() {
 
 sanity_check() {
     set -ex
+    sanity_clang
     sanity_license
     sanity_python
     sanity_cpp
@@ -716,6 +717,43 @@ sanity_cpp() {
     3rdparty/dmlc-core/scripts/lint.py mxnet cpp include src plugin cpp-package tests --exclude_path src/operator/contrib/ctc_include include/onednn
 }
 
+sanity_clang() {
+    set -ex
+    # .github/workgflows/greetings.yml passes BASE_SHA, GITHUB_RUN_ID, GITHUB_BASE_REF for pull requests.
+    BASE_SHA="${GITHUB_PR_BASE_SHA}"
+    GITHUB_RUN_ID="${GITHUB_PR_RUN_ID}"
+    GITHUB_BASE_REF="${GITHUB_PR_BASE_REF}"
+
+    if [ "${BASE_SHA}" == "" ]; then
+        BASE_SHA=`git show-ref --hash refs/remotes/origin/master`
+        if [ "${GITHUB_RUN_ID}" == "" ] || [ "${GITHUB_BASE_REF}" == "" ]; then
+             GITHUB_RUN_ID=`(git log --pretty=format:'%h' -n 1)`
+             GITHUB_BASE_REF="master"
+        fi
+    fi
+
+    git remote add "${GITHUB_RUN_ID}" https://github.com/apache/incubator-mxnet.git
+    git fetch "${GITHUB_RUN_ID}" "$GITHUB_BASE_REF"
+
+    tools/lint/clang_format_ci.sh "${BASE_SHA}"
+    GIT_DIFFERENCE=$(git diff)
+    if [[ -z $GIT_DIFFERENCE ]]; then
+        git remote remove "${GITHUB_RUN_ID}" # temporary remote is removed
+        exit 0
+    fi
+
+    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+    echo "| clang-format failures found! Run: "
+    echo "|    tool/lint/clang_format_ci.sh ${BASE_SHA} "
+    echo "| to fix this error. "
+    echo "| For more info, see: "
+    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+
+    echo "$GIT_DIFFERENCE"
+    git remote remove "${GITHUB_RUN_ID}" # temporary remote is removed
+    exit 1
+}
+
 sanity_python() {
     set -ex
     export DMLC_LOG_STACK_TRACE_DEPTH=100

rat-excludes

@@ -71,6 +71,9 @@ DartConfiguration.tcl
 .*\.egg-info
 .*\.t
 
+# SPDX-License-Identifier: git-clang-format-13
+git-clang-format-13
+
 # Files generated by Cython
 core.cpp
 symbol.cpp

tools/git-pre-commit

@@ -0,0 +1,22 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+#!/bin/bash
+set -e
+
+echo "Running pre-commit clang-format"
+tools/lint/git-clang-format HEAD~ --force

tools/license_header.py

@@ -77,6 +77,9 @@
                '3rdparty/ps-lite',
                '3rdparty/tvm',
 
+               # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+               'tools/lint/git-clang-format-13',
+
                # 3rdparty headerfiles under different licenses
                'include/onednn',
 

tools/lint/clang_format_ci.sh

@@ -0,0 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+#!/bin/sh
+set -eux 
+    tools/lint/git-clang-format-13 --verbose "$1" --