Use the command env-vars-file instead of env-var-file. (#45)

As defined in the docs, the command should be  '--env-vars-file' https://cloud.google.com/functions/docs/env-var

Running the original code we just get Error: ` unrecognized arguments: --env-var-file=ci-env.yaml (did you mean '--env-vars-file'?)`

Author: Felix Garcia Borrego

invoker/function-maven-plugin/src/main/java/com/google/cloud/functions/plugin/DeployFunction.java

@@ -329,7 +329,7 @@ public List<String> getCommands() {
       commands.add("--set-env-vars=" + mapJoiner.join(environmentVariables));
     }
     if (envVarsFile != null) {
-      commands.add("--env-var-file=" + envVarsFile);
+      commands.add("--env-vars-file=" + envVarsFile);
     }
     commands.add("--runtime=" + runtime);
 

invoker/function-maven-plugin/src/test/java/com/google/cloud/functions/plugin/DeployFunctionTest.java

@@ -48,7 +48,7 @@ public void testDeployFunctionCommandLine() {
             "--vpc-connector=a connector",
             "--max-instances=3",
             "--set-env-vars=env1=a,env2=b",
-            "--env-var-file=myfile",
+            "--env-vars-file=myfile",
             "--runtime=java11");
     assertThat(mojo.getCommands()).isEqualTo(expected);
   }