Terraform Enterprise custom build worker variables set in ~/.bashrc are not used in local-exec

Problem

When using a custom build worker in Terraform Enterprise, environment variables defined in the worker's ~/.bashrc file are not sourced or available to local-exec provisioners during a run.

Prerequisites

• Terraform Enterprise version v202308-1 or older.
• A custom build worker with environment variables configured in its ~/.bashrc file.

Cause

By default, the local-exec provisioner in Terraform Enterprise does not execute commands within a bash shell. As a result, shell-specific startup files like ~/.bashrc are not loaded, and the environment variables they define are not available to the provisioner's command.

Solution

Specify a Bash Interpreter

To resolve this, explicitly define the interpreter for the local-exec provisioner to be /bin/bash. This forces the command to run within a bash shell, which will source the ~/.bashrc file.

You can configure the interpreter directly within the provisioner block.

resource "null_resource" "example" {
  provisioner "local-exec" {
    command     = "env"
    interpreter = ["/bin/bash", "-c"]
  }
}

Additional Information

• For more details on local-exec arguments, refer to the local-exec Provisioner Documentation.