codex-rs: enable config tests, expose find_codex_home, add auto‑mount repo sandbox logic

codex-rs/cli/tests/config_cmd.rs

@@ -0,0 +1,43 @@
+/// Integration test for the `codex config` subcommand.
+/// This uses `CARGO_BIN_EXE_codex` to locate the compiled binary.
+#[cfg(test)]
+mod cli_config {
+    use std::process::Command;
+    use std::fs;
+    use tempfile;
+    use toml;
+
+    #[test]
+    fn config_subcommand_help() {
+        let exe = env!("CARGO_BIN_EXE_codex");
+        let output = Command::new(exe)
+            .arg("config")
+            .arg("--help")
+            .output()
+            .expect("failed to run codex config --help");
+        assert!(output.status.success(), "Exited with {:?}", output.status);
+        let stdout = String::from_utf8_lossy(&output.stdout);
+        // Should show config subcommands help
+        assert!(stdout.contains("edit"), "help missing 'edit': {}", stdout);
+        assert!(stdout.contains("set"), "help missing 'set': {}", stdout);
+    }
+
+    #[test]
+    fn config_set_and_read() {
+        let exe = env!("CARGO_BIN_EXE_codex");
+        let tmp = tempfile::tempdir().expect("tempdir");
+        let cfg_path = tmp.path().join("config.toml");
+        let status = Command::new(exe)
+            .env("CODEX_HOME", tmp.path())
+            .arg("config")
+            .arg("set")
+            .arg("tui.auto_mount_repo")
+            .arg("true")
+            .status()
+            .expect("failed to run codex config set");
+        assert!(status.success());
+        let contents = fs::read_to_string(&cfg_path).expect("read config");
+        let doc: toml::Value = toml::from_str(&contents).expect("parse config.toml");
+        assert_eq!(doc["tui"]["auto_mount_repo"].as_bool(), Some(true));
+    }
+}