Attribute Macro create_wit_file

#[create_wit_file]

Annotates a module with #[golem_rust_macro::create_wit_file] and generates WIT file in the root of your project. Supports enums, structs, traits and alias types.

Example:

 #[golem_rust_macro::create_wit_file("auction_app.wit")]
 mod auction_app {
  
     struct BidderId {
         bidder_id: String,
     }
  
     struct AuctionId {
         auction_id: String,
     }
  
     struct Auction {
         auction_id: Option<AuctionId>,
         name: String,
         description: String,
         starting_price: f32,
         deadline: Deadline,
     }
  
     enum BidResult {
         Failure(String),
         Success,
     }
  
     type Deadline = u64;
  
     trait AuctionService {
         fn initialize(auction: Auction);
  
         fn bid(bidder_id: BidderId, price: f32) -> BidResult;
  
         fn close_auction() -> Option<BidderId>;
  
         fn create_bidder(name: String, address: String) -> BidderId;
  
         fn create_auction(
             name: String,
             description: String,
             starting_price: f32,
             deadline: u64,
         ) -> AuctionId;
  
         fn get_auctions() -> Vec<Auction>;
     }
 }

File auction_app.wit is then created with the following content.

package auction:app

interface api {
     
    record bidder-id {
        bidder-id: string,
    }

    record auction-id {
        auction-id: string,
    }

    record auction {
        auction-id: option<auction-id>,
        name: string,
        description: string,
        starting-price: float32,
        deadline: deadline,
    }

    variant bid-result {
        failure(string),
        success
    }
                 
    type deadline = u64

    initialize: func(auction: auction)

    bid: func(bidder-id: bidder-id, price: float32) -> bid-result

    close-auction: func() -> option<bidder-id>

    create-bidder: func(name: string, address: string) -> bidder-id

    create-auction: func(name: string, description: string, starting-price: float32, deadline: u64) -> auction-id

    get-auctions: func() -> list<auction>
}

world golem-service {
    export api
}