TfvarsFilesPlugin & PassPlanFilePlugin - Can't set variables when applying a saved plan

[vincentclee]

The TfvarsFilesPlugin does not play nicely with PassPlanFilePlugin.

Error Message

+ terraform apply -input=false -auto-approve -var-file=./variables/uat.tfvars tfplan-uat
╷
│ Error: Can't set variables when applying a saved plan
│ 
│ The -var and -var-file options cannot be used when applying a saved plan
│ file, because a saved plan includes the variable values that were set when
│ it was created.
╵

Related issue: #417

Jenkinsfile

Jenkinsfile.init(this)
PassPlanFilePlugin.init()
TfvarsFilesPlugin.withDirectory('./variables').init()

def validate = new TerraformValidateStage()
def deploy = new TerraformEnvironmentStage("uat")

validate.then(deploy).build()