Add pr checker for ut (#24628)

* Add pr checker for ut

test=develop

* Change approvers for ut spec checking

test=document_fix

* Change approvers for ut spec checking

test=develop
test=document_fix

* Add comments

test=develop
test=document_fix

* Refine error message

test=develop
test=document_fix

tools/check_api_approvals.sh

@@ -283,6 +283,16 @@ if [ "${ADDED_OP_USE_DEFAULT_GRAD_MAKER}" != "" ]; then
   check_approval 1 32832641 6836917
 fi
 
+# Get the list of PR authors with unresolved unit test issues
+pip install PyGithub
+# For getting PR related data
+wget https://paddle-ci.gz.bcebos.com/blk/block.txt
+HASUTFIXED=`python ${PADDLE_ROOT}/tools/check_ut.py | grep "has unit-test to be fixed" || true`
+if [ "${HASUTFIXED}" != "" ]; then
+  echo_line="${HASUTFIXED} You must have one RD (chalsliu (Recommend) or kolinwei) approval.\n"
+  check_approval 1 45041955 22165420
+fi
+
 if [ -n "${echo_list}" ];then
   echo "****************"
   echo -e "${echo_list[@]}"

tools/check_ut.py

@@ -0,0 +1,54 @@
+#!/bin/env python
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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.
+""" Get pull requests. """
+
+import os
+import time
+import os.path
+from github import Github
+
+
+class PRChecker(object):
+    """ PR Checker. """
+
+    def __init__(self):
+        self.github = Github(os.getenv('GITHUB_API_TOKEN'), timeout=60)
+        self.repo = None
+
+    def check(self):
+        """ check pr """
+        filename = 'block.txt'
+        pr_id = os.getenv('GIT_PR_ID')
+        if not pr_id:
+            print('No PR ID')
+            exit(0)
+        print(pr_id)
+        if not os.path.isfile(filename):
+            print('No author to check')
+            exit(0)
+        self.repo = self.github.get_repo('PaddlePaddle/Paddle')
+        pr = self.repo.get_pull(int(pr_id))
+        user = pr.user.login
+        with open(filename) as f:
+            for l in f:
+                if l.rstrip('\r\n') == user:
+                    print('{} has UT to be fixed, so CI failed.'.format(user))
+                    exit(1)
+        exit(0)
+
+
+if __name__ == '__main__':
+    pr_checker = PRChecker()
+    pr_checker.check()