Updates zalenium to be able to store videos as Jenkins user.

Author: schnatterer

README.md

@@ -4,7 +4,7 @@ zalenium-build-lib
 =======
 
 Jenkins shared library that provides a step that runs a temporary [zalenium server](https://github.com/zalando/zalenium) 
-in a via docker, that records videos of selenium tests. The videos are archived at the Jenkins job by this library.
+in docker container, that records videos of selenium tests. The videos are archived at the Jenkins job by this library.
 
 # Usage
 
@@ -64,7 +64,7 @@ We use the `lock` step of the [Lockable Resources Plugin](https://wiki.jenkins.i
 
 # Troubleshooting
 
-The logs of the zalenium container are stored in $WORKSPACE/zalenium-docker.log.
+The logs of the zalenium container are stored in `$WORKSPACE/zalenium-docker.log`.
 
 You can enable debug logging like so:
 
@@ -77,4 +77,8 @@ withZalenium([ debugZalenium : true ]) { zaleniumIp ->
 # Examples
 
 * [cloudogu/spring-petclinic](https://github.com/cloudogu/spring-petclinic/blob/548db42f320f0f9065876c588c93754beffacc36/Jenkinsfile) (Java / Maven)
-* [cloudogu/nexus](https://github.com/cloudogu/nexus/blob/434c8c3ebef740cd887462aad1292971c46d883e/Jenkinsfile)  (JavaScript / yarn)
+* [cloudogu/nexus](https://github.com/cloudogu/nexus/blob/434c8c3ebef740cd887462aad1292971c46d883e/Jenkinsfile)  (JavaScript / yarn)
+* [cloudogu/jenkins](https://github.com/cloudogu/jenkins/blob/3bc8b6ab406477e0c3bb232e05f745b1fc91ba70/Jenkinsfile)  (JavaScript / yarn)
+* [cloudogu/redmine](https://github.com/cloudogu/redmine/blob/740dd3a99a8111c31e4ada1ccb3023d84d6d205f/Jenkinsfile)  (JavaScript / yarn)
+* [cloudogu/scm](https://github.com/cloudogu/scm/blob/4f1c998425e175a7a52f97dff5b78e82f244a9bf/Jenkinsfile)  (JavaScript / yarn)
+* [cloudogu/sonar](https://github.com/cloudogu/sonar/blob/3488a6e7e38ee5e2e8fde807de570028e15835a1/Jenkinsfile)  (JavaScript / yarn)

vars/withZalenium.groovy

@@ -2,7 +2,7 @@
 void call(config = [:], Closure closure) {
 
     def defaultConfig = [seleniumVersion : '3.141.59-p8',
-                         zaleniumVersion : '3.141.59f',
+                         zaleniumVersion : '3.141.59g',
                          zaleniumVideoDir: "zalenium",
                          debugZalenium   : false]
 
@@ -15,9 +15,13 @@ void call(config = [:], Closure closure) {
     def zaleniumImage = docker.image("dosel/zalenium:${config.zaleniumVersion}")
     zaleniumImage.pull()
 
-    lock("zalenium") {
+    uid = findUid()
+    gid = findGid()
 
+    lock("zalenium") {
         zaleniumImage.withRun(
+                // Run with Jenkins user, so the files created in the workspace by zalenium can be deleted later
+                "-u ${uid}:${gid} -e HOST_UID=${uid} -e HOST_GID=${gid} " +
                 // Zalenium starts headless browsers in docker containers, so it needs the socket
                 '-v /var/run/docker.sock:/var/run/docker.sock ' +
                 "-v ${WORKSPACE}/${config.zaleniumVideoDir}:/home/seluser/videos",
@@ -58,6 +62,17 @@ String findContainerIp(container) {
             .trim()
 }
 
+String findUid() {
+    sh (returnStdout: true,
+            script: 'id -u')
+            .trim()
+}
+String findGid() {
+    sh (returnStdout: true,
+            script: 'id -g')
+            .trim()
+}
+
 void waitForSeleniumToGetReady(String host) {
     timeout(time: 1, unit: 'MINUTES') {
         echo "Waiting for selenium to become ready at http://${host}"