How to access environment variables in post-request scripts (Lua)?

[maniac-en]

Problem Description

I'm trying to access environment variables defined in my .env file within post-request Lua scripts, but os.getenv() returns nil even though the environment file is properly loaded and selected.

Steps to Reproduce

1. Created a .env file with the following content:

   PLATFORM=Prod
   

2. Used :Rest env select command to select the env file

3. Verified the file is loaded with :Rest env show (shows correct file path)

4. Created an HTTP request with a post-script:

   POST {{baseurl}}/reset
   
   # @lang=lua
   > {%
   print(os.getenv("PLATFORM"))
   %}

Expected Behavior

The post-script should print Prod (the value of the PLATFORM environment variable).

Actual Behavior

The post-script prints nil.

Environment

• rest.nvim version commit as per Lazy.nvim:

"rest.nvim": { "branch": "main", "commit": "de9726ab956e30202aafbcdea83c1d6bffe54227" }

• Neovim version:

NVIM v0.11.1
Build type: Release
LuaJIT 2.1.1741730670
Run "nvim -V1 -v" for more info

• OS:

PRETTY_NAME="Ubuntu 24.04.2 LTS"
NAME="Ubuntu"
VERSION_ID="24.04"
VERSION="24.04.2 LTS (Noble Numbat)"
VERSION_CODENAME=noble
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=noble
LOGO=ubuntu-logo

Questions

1. Is os.getenv() the correct way to access environment variables from the .env file in post-scripts?
2. Are environment variables from the .env file supposed to be available in the Lua execution context?
3. Is there a different API or method to access these variables in post-scripts?
4. How can I debug what variables are available in the post-script execution context?

Additional Context

• The {{baseurl}} variable substitution works correctly in the request itself
• The :Rest env show command confirms the environment file is loaded

Any guidance on the proper way to access environment variables in post-request scripts would be greatly appreciated!

[NTBBloodbath]

Hi, rest.nvim uses vim.env metatable instead of os.getenv for the environment variables coming out from files.

[maniac-en]

Hey @NTBBloodbath

I just tried the same and still get a nil whilst everything else is still the same.

POST {{baseurl}}/reset

# @lang=lua
> {%
print(vim.env.PLATFORM)
%}

Few screenshots to support the same

Preview of .env file

Checking for env in Rest.nvim

Output