commit 450415eb6b1dac60164df5580ed23501a3a25b31 Author: Kodi Craft Date: Wed Jun 19 23:25:45 2024 +0200 Implement basic derivation diff --git a/.devcontainer.json b/.devcontainer.json new file mode 100644 index 0000000..2f69206 --- /dev/null +++ b/.devcontainer.json @@ -0,0 +1,12 @@ +{ + "customizations": { + "vscode": { + "extensions": [ + "mkhl.direnv" + ] + } + }, + "image": "ghcr.io/cachix/devenv:latest", + "overrideCommand": false, + "updateContentCommand": "devenv test" +} diff --git a/.envrc b/.envrc new file mode 100644 index 0000000..c420855 --- /dev/null +++ b/.envrc @@ -0,0 +1,10 @@ +if ! has nix_direnv_version || ! nix_direnv_version 2.2.1; then + source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.2.1/direnvrc" "sha256-zelF0vLbEl5uaqrfIzbgNzJWGmLzCmYAkInj/LNxvKs=" +fi + +watch_file flake.nix +watch_file flake.lock +if ! use flake . --impure +then + echo "devenv could not be built. The devenv environment was not loaded. Make the necessary changes to devenv.nix and hit enter to try again." >&2 +fi diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..76059b1 --- /dev/null +++ b/.gitignore @@ -0,0 +1,9 @@ +/target +.direnv +.devenv + +# Added by cargo +# +# already existing elements were commented out + +#/target diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml new file mode 120000 index 0000000..9303253 --- /dev/null +++ b/.pre-commit-config.yaml @@ -0,0 +1 @@ +/nix/store/kk5bnf5cnva2iv7mhkz9drljamjqw18w-pre-commit-config.json \ No newline at end of file diff --git a/Cargo.lock b/Cargo.lock new file mode 100644 index 0000000..90df08e --- /dev/null +++ b/Cargo.lock @@ -0,0 +1,47 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 3 + +[[package]] +name = "eagle" +version = "0.1.0" +dependencies = [ + "proc-macro2", + "quote", + "syn", +] + +[[package]] +name = "proc-macro2" +version = "1.0.85" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "22244ce15aa966053a896d1accb3a6e68469b97c7f33f284b99f0d576879fc23" +dependencies = [ + "unicode-ident", +] + +[[package]] +name = "quote" +version = "1.0.36" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7" +dependencies = [ + "proc-macro2", +] + +[[package]] +name = "syn" +version = "2.0.66" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "c42f3f41a2de00b01c0aaad383c5a45241efc8b2d1eda5661812fda5f3cdcff5" +dependencies = [ + "proc-macro2", + "quote", + "unicode-ident", +] + +[[package]] +name = "unicode-ident" +version = "1.0.12" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b" diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..e9cce3a --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,13 @@ +[package] +name = "eagle" +version = "0.1.0" +edition = "2021" +license = "AGPL-3.0" + +[dependencies] +proc-macro2 = "1.0.85" +quote = "1.0.36" +syn = "2.0.66" + +[lib] +proc-macro = true diff --git a/LICENSE.md b/LICENSE.md new file mode 100644 index 0000000..c6f01c6 --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,660 @@ +# GNU AFFERO GENERAL PUBLIC LICENSE + +Version 3, 19 November 2007 + +Copyright (C) 2007 Free Software Foundation, Inc. + + +Everyone is permitted to copy and distribute verbatim copies of this +license document, but changing it is not allowed. + +## Preamble + +The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + +The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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Protecting Users' Legal Rights From Anti-Circumvention Law. + +No covered work shall be deemed part of an effective technological +measure under any applicable law fulfilling obligations under article +11 of the WIPO copyright treaty adopted on 20 December 1996, or +similar laws prohibiting or restricting circumvention of such +measures. + +When you convey a covered work, you waive any legal power to forbid +circumvention of technological measures to the extent such +circumvention is effected by exercising rights under this License with +respect to the covered work, and you disclaim any intention to limit +operation or modification of the work as a means of enforcing, against +the work's users, your or third parties' legal rights to forbid +circumvention of technological measures. + +### 4. 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Additional Terms. + +"Additional permissions" are terms that supplement the terms of this +License by making exceptions from one or more of its conditions. +Additional permissions that are applicable to the entire Program shall +be treated as though they were included in this License, to the extent +that they are valid under applicable law. If additional permissions +apply only to part of the Program, that part may be used separately +under those permissions, but the entire Program remains governed by +this License without regard to the additional permissions. + +When you convey a copy of a covered work, you may at your option +remove any additional permissions from that copy, or from any part of +it. (Additional permissions may be written to require their own +removal in certain cases when you modify the work.) 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No Surrender of Others' Freedom. + +If conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot convey a +covered work so as to satisfy simultaneously your obligations under +this License and any other pertinent obligations, then as a +consequence you may not convey it at all. For example, if you agree to +terms that obligate you to collect a royalty for further conveying +from those to whom you convey the Program, the only way you could +satisfy both those terms and this License would be to refrain entirely +from conveying the Program. + +### 13. Remote Network Interaction; Use with the GNU General Public License. + +Notwithstanding any other provision of this License, if you modify the +Program, your modified version must prominently offer all users +interacting with it remotely through a computer network (if your +version supports such interaction) an opportunity to receive the +Corresponding Source of your version by providing access to the +Corresponding Source from a network server at no charge, through some +standard or customary means of facilitating copying of software. This +Corresponding Source shall include the Corresponding Source for any +work covered by version 3 of the GNU General Public License that is +incorporated pursuant to the following paragraph. + +Notwithstanding any other provision of this License, you have +permission to link or combine any covered work with a work licensed +under version 3 of the GNU General Public License into a single +combined work, and to convey the resulting work. 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If the Program does not specify a version number of the +GNU Affero General Public License, you may choose any version ever +published by the Free Software Foundation. + +If the Program specifies that a proxy can decide which future versions +of the GNU Affero General Public License can be used, that proxy's +public statement of acceptance of a version permanently authorizes you +to choose that version for the Program. + +Later license versions may give you additional or different +permissions. However, no additional obligations are imposed on any +author or copyright holder as a result of your choosing to follow a +later version. + +### 15. Disclaimer of Warranty. + +THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY +APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT +HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT +WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND +PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE +DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR +CORRECTION. + +### 16. Limitation of Liability. + +IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR +CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES +ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT +NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR +LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM +TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER +PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. + +### 17. Interpretation of Sections 15 and 16. + +If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + +END OF TERMS AND CONDITIONS + +## How to Apply These Terms to Your New Programs + +If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these +terms. + +To do so, attach the following notices to the program. It is safest to +attach them to the start of each source file to most effectively state +the exclusion of warranty; and each file should have at least the +"copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Affero General Public License as + published by the Free Software Foundation, either version 3 of the + License, or (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper +mail. + +If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for +the specific requirements. + +You should also get your employer (if you work as a programmer) or +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. For more information on this, and how to apply and follow +the GNU AGPL, see . diff --git a/README.md b/README.md new file mode 100644 index 0000000..f961be2 --- /dev/null +++ b/README.md @@ -0,0 +1,60 @@ +# Eagle + +## Disclaimer + +Eagle is still in development and not currently usable. The current state is barely a proof of concept. + +## What is Eagle? + +Eagle is a library designed to make "full-stack" applications with Rust. It allows you to define a communication protocl +based on simple "questions" and "answers" which can be implemented as simple functions. From the perspective of the client +(which sends "questions") the protocol is simply a set of async functions on a struct. From the perspective of the server +(which sends "answers") the protocol is a trait which it implements on any struct of its choice. + +## Using Eagle + +The way that `eagle` is designed to be used is inside a shared dependency between your "server" and your "client". Both of these should be in a workspace. Create a `shared` crate which both components should depend on. Inside this crate, you can +define your protocol as an enum: + +```rs +use eagle::Protocol; + +#[derive(Protocol)] +pub enum TestProtocol { + Addition((i32, i32), i32), + SomeKindOfQuestion(String, i32) +} +``` + +In your server, you will be able to implement this protocol for any struct (and in the future register it for communication): + +```rs +use shared::TestProtocolServer; + +pub struct Server; +impl TestProtocolServer for Server { + fn addition(&mut self, a: i32, b: i32) -> i32 { + a + b + } + + fn some_kind_of_question(&mut self, question: String) -> i32 { + 42 + } +} +``` + +In your client, you can use an instance of the client struct to query the server: + +```rs +use shared::TestProtocolClient; + +#[tokio::main] +async fn main() { + let client = TestProtocolClient::new(); + assert_eq!(client.addition(2, 2).await, 4); +} +``` + +## License + +Eagle is licensed under the AGPL (GNU Affero General Public License). To learn more, read [LICENSE](LICENSE) diff --git a/flake.lock b/flake.lock new file mode 100644 index 0000000..8de4f88 --- /dev/null +++ b/flake.lock @@ -0,0 +1,482 @@ +{ + "nodes": { + "cachix": { + "inputs": { + "devenv": "devenv_2", + "flake-compat": [ + "devenv", + "flake-compat" + ], + "nixpkgs": [ + "devenv", + "nixpkgs" + ], + "pre-commit-hooks": [ + "devenv", + "pre-commit-hooks" + ] + }, + "locked": { + "lastModified": 1712055811, + "narHash": "sha256-7FcfMm5A/f02yyzuavJe06zLa9hcMHsagE28ADcmQvk=", + "owner": "cachix", + "repo": "cachix", + "rev": "02e38da89851ec7fec3356a5c04bc8349cae0e30", + "type": "github" + }, + "original": { + "owner": "cachix", + "repo": "cachix", + "type": "github" + } + }, + "devenv": { + "inputs": { + "cachix": "cachix", + "flake-compat": "flake-compat_2", + "nix": "nix_2", + "nixpkgs": [ + "nixpkgs" + ], + "pre-commit-hooks": "pre-commit-hooks" + }, + "locked": { + "lastModified": 1718803884, + "narHash": "sha256-f7M9k4JJs8gRLtGmSELu+IJM5AvDo5Z7ZFuQGEqDJ1g=", + "owner": "cachix", + "repo": "devenv", + "rev": "65e7d51c62114670d38c84aff6cfdfe2ca18bf57", + "type": "github" + }, + "original": { + "owner": "cachix", + "repo": "devenv", + "type": "github" + } + }, + "devenv_2": { + "inputs": { + "flake-compat": [ + "devenv", + "cachix", + "flake-compat" + ], + "nix": "nix", + "nixpkgs": "nixpkgs", + "poetry2nix": "poetry2nix", + "pre-commit-hooks": [ + "devenv", + "cachix", + "pre-commit-hooks" + ] + }, + "locked": { + "lastModified": 1708704632, + "narHash": "sha256-w+dOIW60FKMaHI1q5714CSibk99JfYxm0CzTinYWr+Q=", + "owner": "cachix", + "repo": "devenv", + "rev": "2ee4450b0f4b95a1b90f2eb5ffea98b90e48c196", + "type": "github" + }, + "original": { + "owner": "cachix", + "ref": "python-rewrite", + "repo": "devenv", + "type": "github" + } + }, + "fenix": { + "inputs": { + "nixpkgs": [ + "nixpkgs" + ], + "rust-analyzer-src": "rust-analyzer-src" + }, + "locked": { + "lastModified": 1717827974, + "narHash": "sha256-ixopuTeTouxqTxfMuzs6IaRttbT8JqRW5C9Q/57WxQw=", + "owner": "nix-community", + "repo": "fenix", + "rev": "ab655c627777ab5f9964652fe23bbb1dfbd687a8", + "type": "github" + }, + "original": { + "owner": "nix-community", + "repo": "fenix", + "type": "github" + } + }, + "flake-compat": { + "flake": false, + "locked": { + "lastModified": 1673956053, + "narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=", + "owner": "edolstra", + "repo": "flake-compat", + "rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9", + "type": "github" + }, + "original": { + "owner": "edolstra", + "repo": "flake-compat", + "type": "github" + } + }, + "flake-compat_2": { + "flake": false, + "locked": { + "lastModified": 1696426674, + "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=", + "owner": "edolstra", + "repo": "flake-compat", + "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33", + "type": "github" + }, + "original": { + "owner": "edolstra", + "repo": "flake-compat", + "type": "github" + } + }, + "flake-utils": { + "inputs": { + "systems": "systems" + }, + "locked": { + "lastModified": 1689068808, + "narHash": "sha256-6ixXo3wt24N/melDWjq70UuHQLxGV8jZvooRanIHXw0=", + "owner": "numtide", + "repo": "flake-utils", + "rev": "919d646de7be200f3bf08cb76ae1f09402b6f9b4", + "type": "github" + }, + "original": { + "owner": "numtide", + "repo": "flake-utils", + "type": "github" + } + }, + "flake-utils_2": { + "inputs": { + "systems": "systems_2" + }, + "locked": { + "lastModified": 1710146030, + "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=", + "owner": "numtide", + "repo": "flake-utils", + "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a", + "type": "github" + }, + "original": { + "owner": "numtide", + "repo": "flake-utils", + "type": "github" + } + }, + "gitignore": { + "inputs": { + "nixpkgs": [ + "devenv", + "pre-commit-hooks", + "nixpkgs" + ] + }, + "locked": { + "lastModified": 1709087332, + "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=", + "owner": "hercules-ci", + "repo": "gitignore.nix", + "rev": "637db329424fd7e46cf4185293b9cc8c88c95394", + "type": "github" + }, + "original": { + "owner": "hercules-ci", + "repo": "gitignore.nix", + "type": "github" + } + }, + "nix": { + "inputs": { + "flake-compat": "flake-compat", + "nixpkgs": [ + "devenv", + "cachix", + "devenv", + "nixpkgs" + ], + "nixpkgs-regression": "nixpkgs-regression" + }, + "locked": { + "lastModified": 1712911606, + "narHash": "sha256-BGvBhepCufsjcUkXnEEXhEVjwdJAwPglCC2+bInc794=", + "owner": "domenkozar", + "repo": "nix", + "rev": "b24a9318ea3f3600c1e24b4a00691ee912d4de12", + "type": "github" + }, + "original": { + "owner": "domenkozar", + "ref": "devenv-2.21", + "repo": "nix", + "type": "github" + } + }, + "nix-github-actions": { + "inputs": { + "nixpkgs": [ + "devenv", + "cachix", + "devenv", + "poetry2nix", + "nixpkgs" + ] + }, + "locked": { + "lastModified": 1688870561, + "narHash": 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"owner": "nix-community", + "repo": "poetry2nix", + "rev": "d5006be9c2c2417dafb2e2e5034d83fabd207ee3", + "type": "github" + }, + "original": { + "owner": "nix-community", + "repo": "poetry2nix", + "type": "github" + } + }, + "pre-commit-hooks": { + "inputs": { + "flake-compat": [ + "devenv", + "flake-compat" + ], + "flake-utils": "flake-utils_2", + "gitignore": "gitignore", + "nixpkgs": [ + "devenv", + "nixpkgs" + ], + "nixpkgs-stable": "nixpkgs-stable" + }, + "locked": { + "lastModified": 1713775815, + "narHash": "sha256-Wu9cdYTnGQQwtT20QQMg7jzkANKQjwBD9iccfGKkfls=", + "owner": "cachix", + "repo": "pre-commit-hooks.nix", + "rev": "2ac4dcbf55ed43f3be0bae15e181f08a57af24a4", + "type": "github" + }, + "original": { + "owner": "cachix", + "repo": "pre-commit-hooks.nix", + "type": "github" + } + }, + "root": { + "inputs": { + "devenv": "devenv", + "fenix": "fenix", + "nixpkgs": "nixpkgs_2", + "systems": "systems_3" + } + }, + "rust-analyzer-src": { + "flake": false, + "locked": { + "lastModified": 1717583671, + "narHash": "sha256-+lRAmz92CNUxorqWusgJbL9VE1eKCnQQojglRemzwkw=", + "owner": "rust-lang", + "repo": "rust-analyzer", + "rev": "48bbdd6a74f3176987d5c809894ac33957000d19", + "type": "github" + }, + "original": { + "owner": "rust-lang", + "ref": "nightly", + "repo": "rust-analyzer", + "type": "github" + } + }, + "systems": { + "locked": { + "lastModified": 1681028828, + "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=", + "owner": "nix-systems", + "repo": "default", + "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e", + "type": "github" + }, + "original": { + "owner": "nix-systems", + "repo": "default", + "type": "github" + } + }, + "systems_2": { + "locked": { + "lastModified": 1681028828, + "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=", + "owner": "nix-systems", + "repo": "default", + "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e", + "type": "github" + }, + "original": { + "owner": "nix-systems", + "repo": "default", + "type": "github" + } + }, + "systems_3": { + "locked": { + "lastModified": 1681028828, + "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=", + "owner": "nix-systems", + "repo": "default", + "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e", + "type": "github" + }, + "original": { + "owner": "nix-systems", + "repo": "default", + "type": "github" + } + } + }, + "root": "root", + "version": 7 +} diff --git a/flake.nix b/flake.nix new file mode 100644 index 0000000..69f6bc9 --- /dev/null +++ b/flake.nix @@ -0,0 +1,54 @@ +{ + inputs = { + nixpkgs.url = "github:cachix/devenv-nixpkgs/rolling"; + systems.url = "github:nix-systems/default"; + devenv.url = "github:cachix/devenv"; + devenv.inputs.nixpkgs.follows = "nixpkgs"; + fenix.url = "github:nix-community/fenix"; + fenix.inputs.nixpkgs.follows = "nixpkgs"; + }; + + nixConfig = { + extra-trusted-public-keys = "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw="; + extra-substituters = "https://devenv.cachix.org"; + }; + + outputs = { self, nixpkgs, devenv, systems, ... } @ inputs: + let + forEachSystem = nixpkgs.lib.genAttrs (import systems); + in + { + packages = forEachSystem (system: { + devenv-up = self.devShells.${system}.default.config.procfileScript; + }); + + devShells = forEachSystem + (system: + let + pkgs = nixpkgs.legacyPackages.${system}; + in + { + default = devenv.lib.mkShell { + inherit inputs pkgs; + modules = [ + { + packages = with pkgs; [pkg-config]; + + languages.rust.enable = true; + languages.rust.channel = "nightly"; + languages.nix.enable = true; + + pre-commit.hooks = { + clippy.enable = true; + rustfmt.enable = true; + cargo-check.enable = true; + }; + + difftastic.enable = true; + devcontainer.enable = true; + } + ]; + }; + }); + }; +} diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..c93ddcc --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,118 @@ +/* +Eagle - A library for creating protocols for full-stack Rust applications +Copyright (c) 2024 KodiCraft + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as +published by the Free Software Foundation, either version 3 of the +License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ +use proc_macro::TokenStream; +use quote::quote; +use syn::{parse_macro_input, spanned::Spanned, DeriveInput, Field, Ident}; + +#[proc_macro_derive(Protocol)] +pub fn derive_protocol(input: TokenStream) -> TokenStream { + let input = parse_macro_input!(input as DeriveInput); + // Must be on an enum + let enum_ = match &input.data { + syn::Data::Enum(e) => e, + _ => { + return syn::Error::new(input.span(), "Protocol can only be derived on enums") + .to_compile_error() + .into() + } + }; + let name = &input.ident; + let vis = &input.vis; + + let mut server_trait = Vec::new(); + let mut client_impl = Vec::new(); + + for variant in &enum_.variants { + // Every variant must have 2 fields + // The first field is the question (serverbound), the second field is the answer (clientbound) + if variant.fields.len() != 2 { + return syn::Error::new( + variant.span(), + "Every variant on a protocol must have exactly 2 fields", + ) + .to_compile_error() + .into(); + } + + let var_name = ident_to_snake_case(&variant.ident); + let mut variant_fields = variant.fields.iter(); + let question_field = variant_fields.next().unwrap(); + let question_args = field_to_args(question_field); + let answer_type = variant_fields.next().unwrap().ty.clone(); + + server_trait.push(quote! { + fn #var_name(&mut self, #question_args) -> #answer_type; + }); + client_impl.push(quote! { + pub fn #var_name(&mut self, #question_args) -> #answer_type { + ::std::unimplemented!() + } + }) + } + + // Create a trait which the server will have to implement + let server_trait_name = Ident::new(&format!("{}Server", name), name.span()); + let server_trait = quote! { + #vis trait #server_trait_name { + #(#server_trait)* + } + }; + let client_struct_name = Ident::new(&format!("{}Client", name), name.span()); + let client_struct = quote! { + #vis struct #client_struct_name; // TODO: This struct will have some fields to handle the actual connection + impl #client_struct_name { + #(#client_impl)* + } + }; + + let expanded = quote! { + #server_trait + #client_struct + }; + expanded.into() +} + +fn ident_to_snake_case(ident: &Ident) -> Ident { + let ident = ident.to_string(); + let mut out = String::new(); + for (i, c) in ident.chars().enumerate() { + if c.is_uppercase() { + if i != 0 { + out.push('_'); + } + out.push(c.to_lowercase().next().unwrap()); + } else { + out.push(c); + } + } + Ident::new(&out, ident.span()) +} + +fn field_to_args(field: &Field) -> proc_macro2::TokenStream { + let type_ = &field.ty; + if let syn::Type::Tuple(tuple) = type_ { + let mut args = Vec::new(); + for (i, elem) in tuple.elems.iter().enumerate() { + let arg = Ident::new(&format!("arg{}", i), elem.span()); + args.push(quote! { #arg: #elem }); + } + quote! { #( #args ), * } + } else { + quote! { arg: #type_ } + } +} diff --git a/tests/mod.rs b/tests/mod.rs new file mode 100644 index 0000000..c0ebf13 --- /dev/null +++ b/tests/mod.rs @@ -0,0 +1,35 @@ +/* +Eagle - A library for creating protocols for full-stack Rust applications +Copyright (c) 2024 KodiCraft + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as +published by the Free Software Foundation, either version 3 of the +License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ +use eagle::Protocol; + +#[derive(Protocol)] +enum TestProtocol { + Addition((i32, i32), i32), + SomeKindOfQuestion(String, i32), +} + +struct DummyServer; +impl TestProtocolServer for DummyServer { + fn some_kind_of_question(&mut self, question: String) -> i32 { + question.len() as i32 + } + + fn addition(&mut self, arg0: i32, arg1: i32) -> i32 { + todo!() + } +}