ready-set-rust

ReadySet — by PulseArc.

The first-party ready-set provider for Rust workspace foundations.

This crate ships the ready-set-rust binary, a provider plugin discovered on PATH by the ready-set dispatcher. It contributes four capabilities to the readiness matrix and answers the lifecycle protocol (__ready, __set, __go) for each.

The provider id is rust. The plugin declares a Cargo workspace project requirement (project_requirements = ["cargo-workspace"]) — outside one, lifecycle calls return ExitCode::ProjectRequirementMissing.

For the lifecycle grammar and how providers participate in the dispatcher, see the workspace root README.md.

Install

cargo install ready-set-rust

After installation the plugin is automatically discovered by the dispatcher.

Capabilities

All four capabilities default to relevance = "required". A project can override that in .ready-set.toml:

[capabilities.linting]
relevance = "optional"

Usage

Through the dispatcher (the normal path):

ready-set ready              # whole-product matrix; this plugin contributes 4 rows
ready-set ready linting
ready-set set                # reconcile required capabilities (workspace + toolchain + formatting + linting)
ready-set set linting
ready-set set --dry-run      # plan only; writes nothing
ready-set set --force        # overwrite diverged managed files
ready-set go formatting      # cargo fmt --check
ready-set go linting         # cargo clippy --workspace --all-targets

Direct provider protocol (rarely needed; mostly useful for plugin authors debugging the contract):

ready-set-rust __describe
ready-set-rust __ready linting
ready-set-rust __set linting
ready-set-rust __go linting

What set writes

set is the only verb that mutates the filesystem. The Rust provider's set produces these files in idempotent fashion:

Templates live under src/templates/ and are embedded at compile time via include_str!.

set accepts:

• --dry-run — plan only; writes nothing.
• --force — overwrite managed files even if they have diverged.
• --member <path> — narrow scope to a single workspace member.
• --no-discover — skip workspace member discovery.

Every write is recorded under .ready-set/changes/rust-<timestamp>-<rand>.jsonl with a before_sha256 / after_sha256 per record. Pre-mutation file content is preserved under .ready-set/backups/<sha256> so the planned ready-set undo can reverse it.

What go runs

go never bootstraps missing files. It runs the canonical local workflow for the capability and reports failure correctly:

Selecting a capability that does not support go is a user error rejected by the dispatcher before the provider is spawned.

Module map

ready-set-rust/src/
├── main.rs              # binary entry; parses lifecycle request and dispatches
├── lib.rs               # describe() + rust_capabilities()
├── readiness.rs         # __ready: per-capability state evaluation
├── runner.rs            # __set: planning + writing through the change log
├── workflow.rs          # __go: cargo fmt / cargo clippy invocation
├── workspace.rs         # Cargo workspace resolution (walks upward)
├── members.rs           # Cargo workspace member discovery
├── manifest_edit.rs     # toml_edit-based root Cargo.toml updates
├── ready_set_toml.rs    # generates .ready-set.toml (schema v2)
├── gitignore.rs         # manage the .gitignore ready-set block
├── options.rs           # CLI argument parsing for __set
├── templates.rs         # include_str! handles for the embedded templates
└── templates/
    ├── rust-toolchain.toml
    ├── rustfmt.toml
    ├── clippy.toml
    ├── workspace-lints.toml
    └── gitignore

tests/rust_provider_e2e.rs runs the binary against fresh and dirty fixture workspaces to verify idempotency, --dry-run, --force, change log records, and the workflow exit codes.

Library surface

ready-set-rust is primarily a binary, but exposes a library so the dispatcher's integration tests and downstream tooling can drive it in-process:

pub const PROVIDER_ID: &str = "rust";

pub fn describe() -> ready_set_sdk::describe::Describe;
pub fn rust_capabilities() -> Vec<ready_set_sdk::CapabilityDescriptor>;

The submodules (readiness, runner, workflow, workspace, …) are public for testing and embedding but are not a stable embedder API. The stable surface is the CLI plus the lifecycle protocol.

Reversibility

Every set write is recorded as a ChangeRecord JSONL line under .ready-set/changes/rust-<timestamp>-<rand>.jsonl:

{"op":"create","path":"rustfmt.toml","before_sha256":null,"after_sha256":"…"}

When a managed file is modified or deleted, pre-change content is saved under .ready-set/backups/<sha256> (content-addressed). The planned ready-set undo will consume these records regardless of which provider produced them.

set --dry-run writes neither change records nor backups.

See docs/contracts/change-log.md.

Platform support

platforms = ["linux", "macos", "windows"]. The provider invokes Cargo via std::process::Command (no sh -c, no cmd /c) so the same code path runs on all three platforms. Path handling uses std::path::Path / PathBuf throughout.

See also

• Workspace README.md — product, lifecycle, principles, roadmap.
• docs/contracts/ — versioned protocol specs the provider conforms to.
• ready-set — the dispatcher that discovers and exec's this provider.
• ready-set-sdk — the SDK this provider builds on; also the recommended starting point for writing your own provider.

License

Licensed under either of MIT or Apache-2.0, at your option.