jenkins: linter refactor & fix for 6.x (#1349)

* break down directive into single commands
* don't fail if `lint-md-build` doesn't exist
* replace `sed` with `awk`

PR-URL: #1349
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Matheus Marchini <matheus@sthima.com>

jenkins/pipelines/node-linter.jenkinsfile

@@ -8,8 +8,6 @@ pipeline {
         string(name: 'GIT_REMOTE_REF', defaultValue: 'refs/heads/master', description: 'The remote portion of the Git refspec to fetch and test')
         string(name: 'REBASE_ONTO', defaultValue: '', description: 'Optionally, rebase onto the given ref before testing. Leave blank to skip rebasing.')
         string(name: 'POST_REBASE_SHA1_CHECK', defaultValue: '', description: 'After rebasing, check that the resulting commit sha1 matches the given one. If left blank, no check is performed.')
-        choice(name: 'GIT_ORIGIN_SCHEME', choices: "https://github.com/\ngit@github.com:", description: '')
-        string(name: 'POST_STATUS_TO_PR', defaultValue: '', description: 'Posts build status updates to a nodejs/node PR.')
         string(name: 'CONFIG_FLAGS', defaultValue: '', description: 'Add arguments to ./configure.')
     }
 
@@ -23,33 +21,40 @@ pipeline {
                     ]],
                     userRemoteConfigs: [[
                         credentialsId: "96d5f81c-e9ad-45f7-ba5d-bc8107c0ae2c",
-                        url: "${params.GIT_ORIGIN_SCHEME}${params.GITHUB_ORG}/${params.REPO_NAME}",
+                        url: "git@github.com:${params.GITHUB_ORG}/${params.REPO_NAME}",
                         refspec: "+refs/heads/*:refs/remotes/origin/* +${params.GIT_REMOTE_REF}:refs/remotes/origin/_jenkins_local_branch"
                     ]]
                 ])
             }
         }
 
-        stage('Preflight') {
+        stage('Pre-flight') {
             steps {
-                sh "curl https://raw.githubusercontent.com/nodejs/build/master/jenkins/scripts/node-test-commit-pre.sh -s | bash -xe"
+                sh "curl -L -s https://raw.githubusercontent.com/nodejs/build/master/jenkins/scripts/node-test-commit-pre.sh -s | bash -xe"
                 sendBuildStatus("pending", env)
+                checkMake()
+                // Make sure we have a node binary in the path 
+                sh 'node --version'
             }
         }
 
+        stage('Build linting tools') {
+            steps {
+                // Calling with `returnStatus` suppresses automatic failures
+                sh(script: "${env.MAKE} lint-md-build", returnStatus: true)
+            }
+        }
+
         stage('Run tests') {
             steps {
-                checkMake()
-                checkSed()
-                sh """
-                  # this job does not build node, so we symlink the system's node
-                  which node #&& ln -s ${sh(script: "which node", returnStdout: true).trim()}
-                  node --version
-
-                  ${env.MAKE} lint-md-build || true
-                  # If lint-ci fails, print all the interesting lines to the console.
-                  ${env.MAKE} lint-ci || { cat test-eslint.tap | grep -v '^ok\\|^TAP version 13\\|^1\\.\\.' | ${env.SED} '/^/\\s*\$/d' && exit 1; }
-                """
+                script {
+                    // this job does not build node, so we use the system's node 
+                    def ret = sh(script: "NODE=node ${env.MAKE} lint-ci", returnStatus: true)
+                    if (ret != 0) {
+                        echo(extractErrors())
+                        error('lint failed - open above section for details')
+                    }
+                }
             }
         }
     }
@@ -65,6 +70,23 @@ pipeline {
     }
 }
 
+def extractErrors() {
+    def tap = readFile('test-eslint.tap')
+    tap = tap.replaceAll('(?m)^ok.*', '')
+    tap = tap.replaceAll('(?m)^TAP version 13.*', '')
+    tap = tap.replaceAll('(?m)^1\\.\\..*', '')
+    tap = tap.replaceAll('(?m)^\\s+$', '')
+    return tap
+}
+
+def tap2JUnit() {
+    fileOperations([folderCreateOperation('out/junit')])
+    def status = sh(returnStatus: true, script: 'tap2junit -i test-eslint.tap -o out/junit/test-eslint.xml')
+    if (status == 0) {
+        junit(allowEmptyResults: true, testResults: 'out/junit/*.xml')
+    }
+}
+
 def checkMake() {
     def status = sh(returnStatus: true, script: "which gmake")
     if (status != 0) {
@@ -74,14 +96,6 @@ def checkMake() {
     }
 }
 
-def checkSed() {
-    def status = sh(returnStatus: true, script: "which gsed")
-    if (status != 0) {
-        env.SED = 'sed'
-    } else {
-        env.SED = 'gsed'
-    }
-}
 
 def sendBuildStatus(status, env) {
     build job: 'post-build-status-update', parameters: [