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Add bundled function support (#100)
* feat: add merged handler support * feat: add merged handler support docs * Update README.md * Update crates/vercel_runtime_macro/Cargo.toml Co-authored-by: Douglas Parsons <dglsparsons@users.noreply.github.com> * rename paths * WIP (yikes) * Remove the need for env variables * Remove erroneous lockfile * Handle non-bundled routes with v2 output * Update README * Fixes with Florentin * add new dev builder * `4.0.0 stable` * bump crates and examples * bump crates * bump crates and builder modules * update lockfiles --------- Co-authored-by: Florentin / 珞辰 <ecklf@icloud.com>
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β€ŽCargo.lockβ€Ž

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β€ŽCargo.tomlβ€Ž

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[workspace]
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members = [
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"vercel_runtime",
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"examples/simple",
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"crates/vercel_runtime",
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"crates/vercel_runtime_macro",
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"crates/vercel_runtime_router",
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"examples/cron",
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"examples/nextjs",
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"examples/simple",
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"examples/route-merge",
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]
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exclude = [

β€ŽREADME.mdβ€Ž

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{
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"functions": {
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"api/**/*.rs": {
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"runtime": "vercel-rust@4.0.0-beta.4"
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"runtime": "vercel-rust@4.0.0"
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}
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}
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}
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tokio = { version = "1", features = ["macros"] }
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serde_json = { version = "1", features = ["raw_value"] }
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# Documentation: https://docs.rs/vercel_runtime/latest/vercel_runtime
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vercel_runtime = { version = "0.2.1" }
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vercel_runtime = { version = "1.0.0" }
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# You can specify a library for shared logic here (optional)
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# [lib]
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For more information, please see [this issue](https://github.com/mike-engel/vercel-rust/issues/2).
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### Experimental API Bundling
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This feature allows you to bundle all of your routes into _a single_ deployed Vercel function.
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This serves to optimize cold starts, as lambda functions are reused as much as possible.
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In addition, this has the benefit of only needing to annotate a single `[[bin]]` in your `Cargo.toml`.
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To enable this behaviour, take the following steps:
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1. Create a `api/main.rs`.
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```rust
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use vercel_runtime::{bundled_api, run, Body, Error, Request, Response};
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#[tokio::main]
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async fn main() -> Result<(), Error> {
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run(handler).await
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}
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// bundled_api is a proc macro which injects a router for all `*.rs` files in your `api` directory.
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// If you are using cargo workspaces (like `examples/route-merge` in this repository),
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// then an additional `path` argument must be passed to the macro. E.g.
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// #[bundled_api( path = "examples/route-merge" )]
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#[bundled_api]
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pub async fn handler(req: Request) -> Result<Response<Body>, Error> {}
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```
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2. Change your `vercel.json` to only specify your `api/main.rs` file.
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```json
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{
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"functions": {
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"api/main.rs": {
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"runtime": "vercel-rust@4.0.0"
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}
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}
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}
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```
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3. Change your `Cargo.toml` to specify the binary for `main.rs`.
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```toml
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[[bin]]
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name = "main"
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path = "api/main.rs"
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```
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4. Add a `handler` function to each route in `api/**`.
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```rust
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// Example api/foo.rs
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use vercel_runtime::{Body, Error, Request, Response, StatusCode};
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pub async fn handler(_req: Request) -> Result<Response<Body>, Error> {
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Ok(Response::builder()
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.status(StatusCode::OK)
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.header("Content-Type", "application/json")
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.body(Body::Text("Route is /api/foo".into()))?)
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}
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```
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## Contributing
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Since this project contains both Rust and Node.js code, you need to install the relevant dependencies. If you're only working on the TypeScript side, you only need to install those dependencies (and vice-versa).

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[package]
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name = "vercel_runtime"
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version = "0.2.1"
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version = "1.0.0"
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edition = "2021"
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authors = ["Vercel <support@vercel.com>"]
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description = "Vercel Rust Function Runtime"
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base64 = "0.21.0"
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bytes = "1.4.0"
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async-trait = "0.1.66"
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# vercel_runtime_router = { version = "1.0.0", path = "../vercel_runtime_router" }
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# vercel_runtime_macro = { version = "1.0.0", path = "../vercel_runtime_macro" }
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vercel_runtime_router = "1.0.0"
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vercel_runtime_macro = "1.0.0"

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use std::future::Future;
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use tracing::{debug, error};
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pub use vercel_runtime_macro::bundled_api;
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pub use vercel_runtime_router::{Route, Router};
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pub type Event<'a> = LambdaEvent<VercelEvent<'a>>;
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pub use lambda_http::{

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