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feat: introduce codex-utils-cargo-bin as an alternative to assert_cmd::Command (#8496)

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This PR introduces a `codex-utils-cargo-bin` utility crate that
wraps/replaces our use of `assert_cmd::Command` and
`escargot::CargoBuild`.

As you can infer from the introduction of `buck_project_root()` in this
PR, I am attempting to make it possible to build Codex under
[Buck2](https://buck2.build) as well as `cargo`. With Buck2, I hope to
achieve faster incremental local builds (largely due to Buck2's
[dice](https://buck2.build/docs/insights_and_knowledge/modern_dice/)
build strategy, as well as benefits from its local build daemon) as well
as faster CI builds if we invest in remote execution and caching.

See
https://buck2.build/docs/getting_started/what_is_buck2/#why-use-buck2-key-advantages
for more details about the performance advantages of Buck2.

Buck2 enforces stronger requirements in terms of build and test
isolation. It discourages assumptions about absolute paths (which is key
to enabling remote execution). Because the `CARGO_BIN_EXE_*` environment
variables that Cargo provides are absolute paths (which
`assert_cmd::Command` reads), this is a problem for Buck2, which is why
we need this `codex-utils-cargo-bin` utility.

My WIP-Buck2 setup sets the `CARGO_BIN_EXE_*` environment variables
passed to a `rust_test()` build rule as relative paths.
`codex-utils-cargo-bin` will resolve these values to absolute paths,
when necessary.


---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/openai/codex/pull/8496).
* #8498
* __->__ #8496
This commit is contained in:
Michael Bolin
2025-12-23 19:29:32 -08:00
committed by GitHub
parent 96a65ff0ed
commit e61bae12e3
37 changed files with 248 additions and 101 deletions
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10
codex-rs/app-server/tests/common/mcp_process.rs
View File

@@ -11,7 +11,6 @@ use tokio::process::ChildStdin;
use tokio::process::ChildStdout;
use anyhow::Context;
use assert_cmd::prelude::*;
use codex_app_server_protocol::AddConversationListenerParams;
use codex_app_server_protocol::ArchiveConversationParams;
use codex_app_server_protocol::CancelLoginAccountParams;
@@ -49,7 +48,6 @@ use codex_app_server_protocol::ThreadResumeParams;
use codex_app_server_protocol::ThreadStartParams;
use codex_app_server_protocol::TurnInterruptParams;
use codex_app_server_protocol::TurnStartParams;
use std::process::Command as StdCommand;
use tokio::process::Command;
pub struct McpProcess {
@@ -78,12 +76,8 @@ impl McpProcess {
codex_home: &Path,
env_overrides: &[(&str, Option<&str>)],
) -> anyhow::Result<Self> {
// Use assert_cmd to locate the binary path and then switch to tokio::process::Command
let std_cmd = StdCommand::cargo_bin("codex-app-server")
.context("should find binary for codex-mcp-server")?;
let program = std_cmd.get_program().to_owned();
let program = codex_utils_cargo_bin::cargo_bin("codex-app-server")
.context("should find binary for codex-app-server")?;
let mut cmd = Command::new(program);
cmd.stdin(Stdio::piped());