feat: wire ephemeral in codex exec (#10758)

codex-rs/exec/tests/suite/ephemeral.rs

@@ -0,0 +1,55 @@
+#![cfg(not(target_os = "windows"))]
+#![allow(clippy::expect_used, clippy::unwrap_used)]
+
+use codex_utils_cargo_bin::find_resource;
+use core_test_support::test_codex_exec::test_codex_exec;
+use walkdir::WalkDir;
+
+fn session_rollout_count(home_path: &std::path::Path) -> usize {
+    let sessions_dir = home_path.join("sessions");
+    if !sessions_dir.exists() {
+        return 0;
+    }
+
+    WalkDir::new(sessions_dir)
+        .into_iter()
+        .filter_map(Result::ok)
+        .filter(|entry| entry.file_type().is_file())
+        .filter(|entry| entry.file_name().to_string_lossy().ends_with(".jsonl"))
+        .count()
+}
+
+#[test]
+fn persists_rollout_file_by_default() -> anyhow::Result<()> {
+    let test = test_codex_exec();
+    let fixture = find_resource!("tests/fixtures/cli_responses_fixture.sse")?;
+
+    test.cmd()
+        .env("CODEX_RS_SSE_FIXTURE", &fixture)
+        .env("OPENAI_BASE_URL", "http://unused.local")
+        .arg("--skip-git-repo-check")
+        .arg("default persistence behavior")
+        .assert()
+        .code(0);
+
+    assert_eq!(session_rollout_count(test.home_path()), 1);
+    Ok(())
+}
+
+#[test]
+fn does_not_persist_rollout_file_in_ephemeral_mode() -> anyhow::Result<()> {
+    let test = test_codex_exec();
+    let fixture = find_resource!("tests/fixtures/cli_responses_fixture.sse")?;
+
+    test.cmd()
+        .env("CODEX_RS_SSE_FIXTURE", &fixture)
+        .env("OPENAI_BASE_URL", "http://unused.local")
+        .arg("--skip-git-repo-check")
+        .arg("--ephemeral")
+        .arg("ephemeral behavior")
+        .assert()
+        .code(0);
+
+    assert_eq!(session_rollout_count(test.home_path()), 0);
+    Ok(())
+}

codex-rs/exec/tests/suite/mod.rs

@@ -2,6 +2,7 @@
 mod add_dir;
 mod apply_patch;
 mod auth_env;
+mod ephemeral;
 mod originator;
 mod output_schema;
 mod resume;