Added docker creds wrapper and updated git one

helpers.groovy

@@ -44,6 +44,29 @@ def withGiteaCreds(String credentialsId, String gitToolName, Closure body) {
       gitToolName: gitToolName
     )
   ]) {
+    sh "git config user.name ${env.GIT_USERNAME}"
+    sh "git config user.email admin@dipal.ru"
+    body()
+  }
+}
+/* -------------------------------------------------------------------------- */
+/**
+* Wrapper function for `withCredentials` and `docker login` command.
+*
+* By passing existing `credentialsId` and link to `registry` will be
+* extracted credentials from Jenkins and try to login to the registry
+* using them. After all will be executed provided closure.
+*
+*/
+def withDockerCreds(String credentialsId, String registry, Closure body) {
+  withCredentials([
+    usernamePassword(
+      credentialsId: credentialsId,
+      usernameVariable: "DOCKER_LOGIN",
+      passwordVariable: "DOCKER_PASSWORD",
+    )
+  ]) {
+    sh "docker login ${registry} -u ${DOCKER_LOGIN} -p ${DOCKER_PASSWORD}"
     body()
   }
 }