RFC: Extend Bru script to allow for get of process.env values

[dcoomber]

Problem statement

I have several collections that rely on the use of authentication tokens that are specific to each developer and may not be shared or committed to version control.

Proposed solution

Being able to load these tokens from the system environment (process.env) would support my needs for local usage as well as future usage on CI/CD pipeline.

Example

// Pre request script
bru.setVar("esp_token", bru.getProcessEnv("ESP_TOKEN"));

1. Environment variable ESP_TOKEN set in my local machine .bashrc(e.g. export ESP_TOKEN=SUPER_SECRET_KEY)
2. Request header token set to a collection variable (e.g. token: {{esp_token}} )
3. Pre-request script sets the value using a new Bru method getProcessEnv to retrieve the value from local machine ENV (e.g. bru.setVar("esp_token", bru.getProcessEnv("ESP_TOKEN"));)

[dcoomber]

Thank you, @helloanoop

Closing off the issue.