packer/website/content/partials/from-1.5/contextual-source-variables.mdx

## Source Variables

Use the following syntax to access the `name` and `type` of your `source` from provisioners and post-processors:

```
<build-name>.<source-type>.<source-name>
```

The following example queries source names used in the build:

```hcl
source "null" "first-example" {
  communicator = "none"
}

build {
  name = "roles"

  source "null.first-example" {
    name = "consul"
  }
  source "null.first-example" {
    name = "nomad"
  }
  source "null.first-example" {
    name = "vault"
  }
  sources = ["null.first-example"]

  provisioner "shell-local" {
    inline = ["echo ${source.name} and ${source.type}"]
  }
}
```

The example returns the following values:

- `roles.null.consul`: Returns `consul` and `null`
- `roles.null.nomad`: Returns `nomad` and `null`
- `roles.null.vault`: Returns `vault` and `null`
- `roles.null.first-example`: Returns `first-example` and `null`