From 966907b2c692875fdb384f46e52a32fe92270448 Mon Sep 17 00:00:00 2001
From: unknown <serban.nicusor@toptal.com>
Date: Fri, 20 Mar 2020 18:14:50 +0100
Subject: [PATCH] Moved verify changes to shared libraries.

---
 Jenkinsfile | 74 ++++++++---------------------------------------------
 1 file changed, 10 insertions(+), 64 deletions(-)

diff --git a/Jenkinsfile b/Jenkinsfile
index c01d34087a8..ce680e388da 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -2,13 +2,13 @@
 import org.stan.Utils
 
 def utils = new org.stan.Utils()
+def skipRemainingStages = false
 
 def setupCXX(failOnError = true) {
     errorStr = failOnError ? "-Werror " : ""
     writeFile(file: "make/local", text: "CXX=${env.CXX} ${errorStr}")
 }
 
-
 def runTests(String testPath, Boolean separateMakeStep=true) {
     if (separateMakeStep) {
         sh "./runTests.py -j${env.PARALLEL} ${testPath} --make-only"
@@ -30,24 +30,6 @@ def deleteDirWin() {
     deleteDir()
 }
 
-def sourceCodePaths(){
-    // These paths will be passed to git diff
-    // If there are changes to them, CI/CD will continue else skip
-    def paths = ['make', 'src/stan', 'src/test', 'Jenkinsfile', 'makefile', 'runTests.py',
-        'lib/stan_math/stan', 'lib/stan_math/make', 'lib/stan_math/lib', 'lib/stan_math/test', 
-        'lib/stan_math/runTests.py', 'lib/stan_math/runChecks.py', 'lib/stan_math/makefile', 
-        'lib/stan_math/Jenkinsfile', 'lib/stan_math/.clang-format'
-    ]
-    
-    def bashArray = ""
-
-    for(path in paths){
-        bashArray += path + (path != paths[paths.size() - 1] ? " " : "")
-    }
-
-    return bashArray
-}
-
 String cmdstan_pr() { params.cmdstan_pr ?: "downstream_tests" }
 String stan_pr() {
     if (env.BRANCH_NAME == 'downstream_tests') {
@@ -73,9 +55,6 @@ pipeline {
         string(defaultValue: 'downstream_tests', name: 'cmdstan_pr',
           description: 'PR to test CmdStan upstream against e.g. PR-630')
     }
-    environment {
-        scPaths = sourceCodePaths()
-    }
     options {
         skipDefaultCheckout()
         preserveStashes(buildCount: 7)
@@ -188,48 +167,15 @@ pipeline {
                     retry(3) { checkout scm }
                     sh 'git clean -xffd'
 
-                    def commitHash = sh(script: "git rev-parse HEAD | tr '\\n' ' '", returnStdout: true)
-                    def changeTarget = ""
-
-                    if (env.CHANGE_TARGET) {
-                        println "This build is a PR, checking out target branch to compare changes."
-                        changeTarget = env.CHANGE_TARGET
-                        sh(script: "git pull && git checkout ${changeTarget}", returnStdout: false)
-                    }
-                    else{
-                        println "This build is not PR, checking out current branch and extract HEAD^1 commit to compare changes or develop when downstream_tests."
-                        if (env.BRANCH_NAME == "downstream_tests"){
-                            sh(script: "git checkout develop && git pull", returnStdout: false)
-                            changeTarget = sh(script: "git rev-parse HEAD^1 | tr '\\n' ' '", returnStdout: true)
-                            sh(script: "git checkout ${commitHash}", returnStdout: false)
-                        }
-                        else{
-                            sh(script: "git pull && git checkout ${env.BRANCH_NAME}", returnStdout: false)
-                            changeTarget = sh(script: "git rev-parse HEAD^1 | tr '\\n' ' '", returnStdout: true)
-                        }
-                    }
-
-                    println "Comparing differences between current ${commitHash} and target ${changeTarget}."
-
-                    def bashScript = """
-                        for i in ${env.scPaths};
-                        do
-                            git diff ${commitHash} ${changeTarget} -- \$i
-                        done
-                    """
-
-                    def differences = sh(script: bashScript, returnStdout: true)
+                    // These paths will be passed to git diff
+                    // If there are changes to them, CI/CD will continue else skip
+                    def paths = ['make', 'src/stan', 'src/test', 'Jenkinsfile', 'makefile', 'runTests.py',
+                        'lib/stan_math/stan', 'lib/stan_math/make', 'lib/stan_math/lib', 'lib/stan_math/test', 
+                        'lib/stan_math/runTests.py', 'lib/stan_math/runChecks.py', 'lib/stan_math/makefile', 
+                        'lib/stan_math/Jenkinsfile', 'lib/stan_math/.clang-format'
+                    ].join(" ")
 
-                    println differences
-
-                    if (differences?.trim()) {
-                        println "There are differences in the source code, CI/CD will run."
-                        skipRemainingStages = false
-                    }
-                    else{
-                        println "There aren't any differences in the source code, CI/CD will not run."
-                        skipRemainingStages = true
-                    }
+                    skipRemainingStages = utils.verifyChanges(paths)
                 }
             }
             post {
@@ -352,4 +298,4 @@ pipeline {
         unstable { script { utils.mailBuildResults("UNSTABLE", "stan-buildbot@googlegroups.com") } }
         failure { script { utils.mailBuildResults("FAILURE", "stan-buildbot@googlegroups.com") } }
     }
-}
+}
\ No newline at end of file