Files
llmx/codex-rs/exec/src/main.rs
Michael Bolin d60f350cf8 feat: add support for -c/--config to override individual config items (#1137)
This PR introduces support for `-c`/`--config` so users can override
individual config values on the command line using `--config
name=value`. Example:

```
codex --config model=o4-mini
```

Making it possible to set arbitrary config values on the command line
results in a more flexible configuration scheme and makes it easier to
provide single-line examples that can be copy-pasted from documentation.

Effectively, it means there are four levels of configuration for some
values:

- Default value (e.g., `model` currently defaults to `o4-mini`)
- Value in `config.toml` (e.g., user could override the default to be
`model = "o3"` in their `config.toml`)
- Specifying `-c` or `--config` to override `model` (e.g., user can
include `-c model=o3` in their list of args to Codex)
- If available, a config-specific flag can be used, which takes
precedence over `-c` (e.g., user can specify `--model o3` in their list
of args to Codex)

Now that it is possible to specify anything that could be configured in
`config.toml` on the command line using `-c`, we do not need to have a
custom flag for every possible config option (which can clutter the
output of `--help`). To that end, as part of this PR, we drop support
for the `--disable-response-storage` flag, as users can now specify `-c
disable_response_storage=true` to get the equivalent functionality.

Under the hood, this works by loading the `config.toml` into a
`toml::Value`. Then for each `key=value`, we create a small synthetic
TOML file with `value` so that we can run the TOML parser to get the
equivalent `toml::Value`. We then parse `key` to determine the point in
the original `toml::Value` to do the insert/replace. Once all of the
overrides from `-c` args have been applied, the `toml::Value` is
deserialized into a `ConfigToml` and then the `ConfigOverrides` are
applied, as before.
2025-05-27 23:11:44 -07:00

40 lines
1.3 KiB
Rust

//! Entry-point for the `codex-exec` binary.
//!
//! When this CLI is invoked normally, it parses the standard `codex-exec` CLI
//! options and launches the non-interactive Codex agent. However, if it is
//! invoked with arg0 as `codex-linux-sandbox`, we instead treat the invocation
//! as a request to run the logic for the standalone `codex-linux-sandbox`
//! executable (i.e., parse any -s args and then run a *sandboxed* command under
//! Landlock + seccomp.
//!
//! This allows us to ship a completely separate set of functionality as part
//! of the `codex-exec` binary.
use clap::Parser;
use codex_common::CliConfigOverrides;
use codex_exec::Cli;
use codex_exec::run_main;
#[derive(Parser, Debug)]
struct TopCli {
#[clap(flatten)]
config_overrides: CliConfigOverrides,
#[clap(flatten)]
inner: Cli,
}
fn main() -> anyhow::Result<()> {
codex_linux_sandbox::run_with_sandbox(|codex_linux_sandbox_exe| async move {
let top_cli = TopCli::parse();
// Merge root-level overrides into inner CLI struct so downstream logic remains unchanged.
let mut inner = top_cli.inner;
inner
.config_overrides
.raw_overrides
.splice(0..0, top_cli.config_overrides.raw_overrides);
run_main(inner, codex_linux_sandbox_exe).await?;
Ok(())
})
}