chore: expose codex_home via Config (#941)

codex-rs/core/tests/live_agent.rs

@@ -20,13 +20,15 @@
 use std::time::Duration;
 
 use codex_core::Codex;
-use codex_core::config::Config;
 use codex_core::error::CodexErr;
 use codex_core::protocol::AgentMessageEvent;
 use codex_core::protocol::ErrorEvent;
 use codex_core::protocol::EventMsg;
 use codex_core::protocol::InputItem;
 use codex_core::protocol::Op;
+mod test_support;
+use tempfile::TempDir;
+use test_support::load_default_config_for_test;
 use tokio::sync::Notify;
 use tokio::time::timeout;
 
@@ -57,7 +59,8 @@ async fn spawn_codex() -> Result<Codex, CodexErr> {
         std::env::set_var("OPENAI_STREAM_MAX_RETRIES", "2");
     }
 
-    let config = Config::load_default_config_for_test();
+    let codex_home = TempDir::new().unwrap();
+    let config = load_default_config_for_test(&codex_home);
     let (agent, _init_id) = Codex::spawn(config, std::sync::Arc::new(Notify::new())).await?;
 
     Ok(agent)

codex-rs/core/tests/previous_response_id.rs

@@ -2,13 +2,15 @@ use std::time::Duration;
 
 use codex_core::Codex;
 use codex_core::ModelProviderInfo;
-use codex_core::config::Config;
 use codex_core::exec::CODEX_SANDBOX_NETWORK_DISABLED_ENV_VAR;
 use codex_core::protocol::ErrorEvent;
 use codex_core::protocol::EventMsg;
 use codex_core::protocol::InputItem;
 use codex_core::protocol::Op;
+mod test_support;
 use serde_json::Value;
+use tempfile::TempDir;
+use test_support::load_default_config_for_test;
 use tokio::time::timeout;
 use wiremock::Match;
 use wiremock::Mock;
@@ -108,7 +110,8 @@ async fn keeps_previous_response_id_between_tasks() {
     };
 
     // Init session
-    let mut config = Config::load_default_config_for_test();
+    let codex_home = TempDir::new().unwrap();
+    let mut config = load_default_config_for_test(&codex_home);
     config.model_provider = model_provider;
     let ctrl_c = std::sync::Arc::new(tokio::sync::Notify::new());
     let (codex, _init_id) = Codex::spawn(config, ctrl_c.clone()).await.unwrap();

codex-rs/core/tests/stream_no_completed.rs

@@ -5,10 +5,12 @@ use std::time::Duration;
 
 use codex_core::Codex;
 use codex_core::ModelProviderInfo;
-use codex_core::config::Config;
 use codex_core::exec::CODEX_SANDBOX_NETWORK_DISABLED_ENV_VAR;
 use codex_core::protocol::InputItem;
 use codex_core::protocol::Op;
+mod test_support;
+use tempfile::TempDir;
+use test_support::load_default_config_for_test;
 use tokio::time::timeout;
 use wiremock::Mock;
 use wiremock::MockServer;
@@ -96,7 +98,8 @@ async fn retries_on_early_close() {
     };
 
     let ctrl_c = std::sync::Arc::new(tokio::sync::Notify::new());
-    let mut config = Config::load_default_config_for_test();
+    let codex_home = TempDir::new().unwrap();
+    let mut config = load_default_config_for_test(&codex_home);
     config.model_provider = model_provider;
     let (codex, _init_id) = Codex::spawn(config, ctrl_c).await.unwrap();
 

codex-rs/core/tests/test_support.rs

@@ -0,0 +1,23 @@
+#![allow(clippy::expect_used)]
+
+// Helpers shared by the integration tests.  These are located inside the
+// `tests/` tree on purpose so they never become part of the public API surface
+// of the `codex-core` crate.
+
+use tempfile::TempDir;
+
+use codex_core::config::Config;
+use codex_core::config::ConfigOverrides;
+use codex_core::config::ConfigToml;
+
+/// Returns a default `Config` whose on-disk state is confined to the provided
+/// temporary directory. Using a per-test directory keeps tests hermetic and
+/// avoids clobbering a developer’s real `~/.codex`.
+pub fn load_default_config_for_test(codex_home: &TempDir) -> Config {
+    Config::load_from_base_config_with_overrides(
+        ConfigToml::default(),
+        ConfigOverrides::default(),
+        codex_home.path().to_path_buf(),
+    )
+    .expect("defaults for test should always succeed")
+}