cargo-workspace plugin does not support Cargo.toml outside of repository root

[david-chandler-cko]

When using the cargo-workspace plugin with a monorepo where Cargo.toml is not in the root of the repository, Release Please fails with release-please failed: Failed to find file: Cargo.toml.

See

release-please/src/plugins/cargo-workspace.ts

Line 94 in 3cf5360

const cargoManifestContent = await this.github.getFileContentsOnBranch(

; it looks like the path is hard-coded.

I am creating a multi-language implementation of a library and would like to be able to nest each framework's configuration within its own subfolder.

Environment details

• OS: ubuntu
• Node.js version: v22.14
• npm version: 10.9.2
• release-please version: 17.1.2

Steps to reproduce

1. Create a multi-language monorepo with a Rust workspace in a subdirectory (e.g., ./rust) where the Cargo.toml file describing the workspace is stored under ./rust/Cargo.toml
2. Reference this using the cargo-workspace plugin

[seven332]

We ran into the same issue. Our monorepo has Node.js packages under turbo/ and a Rust workspace under crates/. The cargo-workspace plugin fails because it hardcodes Cargo.toml at the repo root.

We've submitted a PR to fix this: #2682. It adds a cargoWorkspacePath option to the plugin config, so you can specify where the workspace Cargo.toml lives:

{
  "plugins": [
    {
      "type": "cargo-workspace",
      "cargoWorkspacePath": "crates"
    }
  ]
}

When not specified, behavior is unchanged (defaults to repo root).