Jenkinsfile: pull latest image from downloads server

Signed-off-by: Nikhil Zinjurde <[email protected]>

Jenkinsfile

@@ -1,3 +1,20 @@
+#!/usr/bin/env groovy
+
+import groovy.json.JsonSlurper
+
+@NonCPS
+def jsonParse(def jsonUrl) {
+    def result = new JsonSlurper().parse(jsonUrl)
+    return result
+}
+
+def getLatestImageUrl() {
+    def url = new URL('http://downloads.creatordev.io/openwrt/release.json')
+    def ci40 = jsonParse(url)
+    def latestImageUrl = "http://downloads.creatordev.io/openwrt/latest/pistachio/marduk/openWrt-${ci40.versions.openwrt}-${ci40.board}-${ci40.profile}-squashfs-factory.ubi"
+    return latestImageUrl
+}
+
 def configureDut() {
     sh 'echo "ifconfig eth0 up" > /dev/ttyUSB0'
     sh 'echo "ifconfig eth1 up" > /dev/ttyUSB0'
@@ -27,8 +44,7 @@ properties([
                           Path to a directory containing the packages folder,\
                           if null defaults to the directory of the image',
             name: "PACKAGES_PATH"),
-        stringParam(defaultValue:
-            'http://downloads.creatordev.io/openwrt/ci40-v1.1.0/pistachio/marduk/openwrt-v1.1.0-pistachio-marduk-squashfs-factory.ubi',
+        stringParam(defaultValue: getLatestImageUrl(),
             description:
             'Either path directly to the image, or path to a Jenkins job from where to get the image',
             name: "IMAGE_PATH"),