anchor.diff:    allowEnv: true <1>
   ----
   
  -<1> Set to `*true*` to allow a generic webhook to pass in environment variables.
  +<1> Set to *true* to allow a generic webhook to pass in environment variables.
   ====
   
   To set up the caller, supply the calling system with the URL of the generic
  
positive.code: 
  ----
  
  <1> Similar to the link:#buildconfig-environment[*BuildConfig* environment]
  variables, the environment variables defined here are made available to your
  build. If these variables collide with the
  link:#buildconfig-environment[*BuildConfig* environment] variables, these
  variables take precedence. By default, environment variables passed via webhook
  are ignored. Set the `*allowEnv*` field to `*true*` on the webhook definition to enable
  this behavior.
  ====
  
  To pass this payload using `curl`, define it in a file named *_payload_file.yaml_* and run:
  
  ----
  $ curl -H "Content-Type: application/yaml" --data-binary @payload_file.yaml -X POST -k https://<openshift_api_host:port>/oapi/v1/namespaces/<namespace>/buildconfigs/<name>/webhooks/<secret>/generic
  ----
  
  The arguments are the same as the previous example with the addition of a header and a payload. The `*-H*` argument sets the `*Content-Type*` header to `*application/yaml*` or `*application/json*` depending on your payload format. The `*--data-binary*` argument is used to send a binary payload with newlines intact with the `*POST*` request.
  
  [[describe-buildconfig]]
  
  
negative.code: 
  The caller must invoke the webhook as a `*POST*` operation.
  
  To invoke the webhook manually you can use `curl`:
  
  ----
  $ curl -X POST -k https://<openshift_api_host:port>/oapi/v1/namespaces/<namespace>/buildconfigs/<name>/webhooks/<secret>/generic
  ----
  
  The HTTP verb must be set to `*POST*`. The insecure `-k` flag is specified to
  ignore certificate validation. This second flag is not necessary if your cluster
  has properly signed certificates.
  
  The endpoint can accept an optional payload with the following format:
  
  