cancel build excluded regions stategy

Jenkinsfile

@@ -76,9 +76,27 @@ pipeline {
       
     
       stage('Parallel test stage') {
+        stage('pre_build'){
+          agent{label 'master'}
+          steps {
+          sh'''
+          cd ${WORKSPACE}
+          git checkout develop
+          git pull
+          git fetch origin +refs/pull/${CHANGE_ID}/merge
+          git checkout -qf FETCH_HEAD
+          '''
+          script{
+            skipstage=sh(script:"git --no-pager diff --name-only FETCH_HEAD develop|grep -v -E '.*md|//src//connector|Jenkinsfile|test-all.sh' || echo 1 ",returnStdout:true) 
+          }
+          }
+      }
         //only build pr
         when {
               changeRequest()
+               expression {
+                    skipstage == 0
+              }
           }
       parallel {
         stage('python_1_s1') {
@@ -128,7 +146,7 @@ pipeline {
         stage('test_b1_s2') {
           agent{label 'b1'}
           steps {     
-            timeout(time: 90, unit: 'MINUTES'){       
+            timeout(time: 45, unit: 'MINUTES'){       
               pre_test()
               sh '''
               cd ${WKC}/tests
@@ -265,7 +283,7 @@ pipeline {
                                     <li>构建结果：<span style="color:green"> Successful </span></li>
                                     <li>构建编号：${BUILD_NUMBER}</li>
                                     <li>触发用户：${env.CHANGE_AUTHOR}</li>
-                                    <li>提交信息：${env.CHANGE_TITLE}</li>
+                                    <li>提交信息：${CHANGE_TITLE}</li>
                                     <li>构建地址：<a href=${BUILD_URL}>${BUILD_URL}</a></li>
                                     <li>构建日志：<a href=${BUILD_URL}console>${BUILD_URL}console</a></li>
                                     
@@ -303,7 +321,7 @@ pipeline {
                                     <li>构建结果：<span style="color:green"> Successful </span></li>
                                     <li>构建编号：${BUILD_NUMBER}</li>
                                     <li>触发用户：${env.CHANGE_AUTHOR}</li>
-                                    <li>提交信息：${env.CHANGE_TITLE}</li>
+                                    <li>提交信息：${CHANGE_TITLE}</li>
                                     <li>构建地址：<a href=${BUILD_URL}>${BUILD_URL}</a></li>
                                     <li>构建日志：<a href=${BUILD_URL}console>${BUILD_URL}console</a></li>