diff --git a/src/pipeline/common/Manifest.groovy b/src/pipeline/common/Manifest.groovy
new file mode 100644
index 0000000..ccb36e9
--- /dev/null
+++ b/src/pipeline/common/Manifest.groovy
@@ -0,0 +1,46 @@
+package pipeline.common
+import java.io.File;
+
+def downloadManifest(String url, String target){
+    withCredentials([
+            usernamePassword(credentialsId: 'a94afe79-82f5-495a-877c-183567c51e0b',
+            passwordVariable: 'BINTRAY_API_KEY',
+            usernameVariable: 'BINTRAY_USERNAME')
+    ]){
+        sh 'curl --user $BINTRAY_USERNAME:$BINTRAY_API_KEY --retry 5 --retry-delay 5 ' + "$url" + ' -o ' + "${target}"
+    }
+}
+
+def stashManifest(String manifest_name, String manifest_path){
+    stash name: "$manifest_name", includes: "$manifest_path"
+    manifest_dict = [:]
+    manifest_dict["stash_name"] = "manifest_name"
+    manifest_dict["stash_path"] = "manifest_path"
+    return manifest_dict
+}
+
+def unstashManifest(Map manifest_dict, String target_dir){
+    String manifest_name = manifest_dict["stash_name"]
+    String manifest_path = manifest_dict["stash_path"]
+    dir(target_dir){
+        unstash "$manifest_name"
+    }
+    manifest_path = target_dir + File.separator + manifest_path
+    return manifest_path
+}
+
+def checkoutTargetRepo(String manifest_path, String repo_name, String on_build_config_dir){
+    sh """#!/bin/bash -ex
+    pushd $on_build_config_dir
+    ./build-release-tools/HWIMO-BUILD ./build-release-tools/application/reprove.py \
+    --manifest ${manifest_path} \
+    --builddir ${WORKSPACE}/build-deps \
+    --jobs 8 \
+    --force \
+    checkout \
+    packagerefs
+    
+    """
+    String repo_dir = "${WORKSPACE}/build-deps/$repo_name"
+    return repo_dir
+}
diff --git a/src/pipeline/common/ShareMethod.groovy b/src/pipeline/common/ShareMethod.groovy
new file mode 100644
index 0000000..a2f00b5
--- /dev/null
+++ b/src/pipeline/common/ShareMethod.groovy
@@ -0,0 +1,67 @@
+package pipeline.common
+
+def checkout(String url, String branch, String targetDir){
+    checkout(
+    [$class: 'GitSCM', branches: [[name: branch]],
+    extensions: [[$class: 'RelativeTargetDirectory', relativeTargetDir: targetDir]],
+    userRemoteConfigs: [[url: url]]])
+}
+def checkout(String url, String branch){
+    checkout(
+    [$class: 'GitSCM', branches: [[name: branch]],
+    userRemoteConfigs: [[url: url]]])
+}
+
+def checkout(String url){
+    checkout(url, "master")
+}
+
+def checkoutOnBuildConfig(String target_dir){
+    String scm_url = scm.getUserRemoteConfigs()[0].getUrl()
+    if(scm_url.contains("on-build-config")){
+        dir(target_dir){
+            checkout scm
+        }
+    }else {
+        checkout("https://github.com/RackHD/on-build-config", master, target_dir)
+    }
+}
+
+def getLockedResourceName(String label_name){
+    // Get the resource name whose label contains the parameter label_name
+    // The locked resources of the build
+    def resources=org.jenkins.plugins.lockableresources.LockableResourcesManager.class.get().getResourcesFromBuild(currentBuild.getRawBuild())
+    def resources_name=[]
+    for(int i=0;i<resources.size();i++){
+        String labels = resources[i].getLabels();
+        List label_names = Arrays.asList(labels.split("\\s+"));
+        for(int j=0;j<label_names.size();j++){
+            if(label_names[j]==label_name){
+                resources_name.add(resources[i].getName());
+            }
+        }
+    }
+    return resources_name
+}
+
+def occupyAvailableLockedResource(String label_name, ArrayList<String> used_resources){
+     // The locked resources whose label contains the parameter label_name
+    resources = getLockedResourceName(label_name)
+    def available_resources = resources - used_resources
+    if(available_resources.size > 0){
+        used_resources.add(available_resources[0])
+        String resource_name = available_resources[0]
+        return resource_name
+    }
+    else{
+        error("There is no available resources for $label_name")
+    }
+}
+
+def parseJsonResource(String resource_path){
+    def json_text = libraryResource(resource_path)
+    def props = readJSON text: json_text
+    return props
+}
+
+return this
diff --git a/workflows/pr_gate/Jenkinsfile b/workflows/pr_gate/Jenkinsfile
index d745960..c03b597 100644
--- a/workflows/pr_gate/Jenkinsfile
+++ b/workflows/pr_gate/Jenkinsfile
@@ -1,8 +1,8 @@
-@Library('my_library') _
+@Library("my_library") _
 node{
     timestamps{
-        def manifest = new pipeline.common.Manifest()
         def unit_test = new pipeline.rackhd.source_code.UnitTest()
+        def manifest = new pipeline.common.Manifest()
     
         manifest.downloadManifest("https://dl.bintray.com/rackhd/binary/master-20170806","master-20170806")
         stash name: "prgate_manifest", includes: "master-20170806"