feat(client): enable setting base URL from environment variable

Author: stainless-app[bot]

lib/openai/client.rb

@@ -86,7 +86,8 @@ class Client < OpenAI::Internal::Transport::BaseClient
     #
     # @param project [String, nil] Defaults to `ENV["OPENAI_PROJECT_ID"]`
     #
-    # @param base_url [String, nil] Override the default base URL for the API, e.g., `"https://api.example.com/v2/"`
+    # @param base_url [String, nil] Override the default base URL for the API, e.g.,
+    # `"https://api.example.com/v2/"`. Defaults to `ENV["OPENAI_BASE_URL"]`
     #
     # @param max_retries [Integer] Max number of retries to attempt after a failed retryable request.
     #
@@ -99,7 +100,7 @@ def initialize(
       api_key: ENV["OPENAI_API_KEY"],
       organization: ENV["OPENAI_ORG_ID"],
       project: ENV["OPENAI_PROJECT_ID"],
-      base_url: nil,
+      base_url: ENV["OPENAI_BASE_URL"],
       max_retries: DEFAULT_MAX_RETRIES,
       timeout: DEFAULT_TIMEOUT_IN_SECONDS,
       initial_retry_delay: DEFAULT_INITIAL_RETRY_DELAY,

rbi/lib/openai/client.rbi

@@ -89,8 +89,9 @@ module OpenAI
       organization: ENV["OPENAI_ORG_ID"],
       # Defaults to `ENV["OPENAI_PROJECT_ID"]`
       project: ENV["OPENAI_PROJECT_ID"],
-      # Override the default base URL for the API, e.g., `"https://api.example.com/v2/"`
-      base_url: nil,
+      # Override the default base URL for the API, e.g.,
+      # `"https://api.example.com/v2/"`. Defaults to `ENV["OPENAI_BASE_URL"]`
+      base_url: ENV["OPENAI_BASE_URL"],
       # Max number of retries to attempt after a failed retryable request.
       max_retries: DEFAULT_MAX_RETRIES,
       timeout: DEFAULT_TIMEOUT_IN_SECONDS,