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feat(lua): reintroduce and_then safely

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əlemi 2024-09-17 14:33:14 +02:00
parent 7b9d743f6f
commit 42ae4247ce
Signed by: alemi
GPG key ID: A4895B84D311642C
3 changed files with 118 additions and 76 deletions
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1
.github/workflows/lua.yml vendored
View file

@ -4,6 +4,7 @@ on:
push:
branches:
- stable
- dev
permissions:
contents: read

13
dist/lua/annotations.lua vendored
View file

@ -14,36 +14,47 @@
---@class (exact) NilPromise : Promise
---@field await fun(self: NilPromise): nil block until promise is ready
---@field and_then fun(cb: fun(x: nil)): nil run callback after promise is complete
---@class (exact) StringPromise : Promise
---@field await fun(self: StringPromise): string block until promise is ready and return value
---@field and_then fun(cb: fun(x: string)): nil run callback after promise is complete
---@class (exact) StringArrayPromise : Promise
---@field await fun(self: StringArrayPromise): string[] block until promise is ready and return value
---@field and_then fun(cb: fun(x: string[])): nil run callback after promise is complete
---@class (exact) ClientPromise : Promise
---@field await fun(self: ClientPromise): Client block until promise is ready and return value
---@field and_then fun(cb: fun(x: Client)): nil run callback after promise is complete
---@class (exact) WorkspacePromise : Promise
---@field await fun(self: WorkspacePromise): Workspace block until promise is ready and return value
---@field and_then fun(cb: fun(x: Workspace)): nil run callback after promise is complete
---@class (exact) WorkspaceEventPromise : Promise
---@field await fun(self: WorkspaceEventPromise): WorkspaceEvent block until promise is ready and return value
---@field and_then fun(cb: fun(x: WorkspaceEvent)): nil run callback after promise is complete
---@class (exact) BufferControllerPromise : Promise
---@field await fun(self: BufferControllerPromise): BufferController block until promise is ready and return value
---@field and_then fun(cb: fun(x: BufferController)): nil run callback after promise is complete
---@class (exact) CursorPromise : Promise
---@field await fun(self: CursorPromise): Cursor block until promise is ready and return value
---@field and_then fun(cb: fun(x: Cursor)): nil run callback after promise is complete
---@class (exact) MaybeCursorPromise : Promise
---@field await fun(self: MaybeCursorPromise): Cursor? block until promise is ready and return value
---@field and_then fun(cb: fun(x: Cursor | nil)): nil run callback after promise is complete
---@class (exact) TextChangePromise : Promise
---@field await fun(self: TextChangePromise): TextChange block until promise is ready and return value
---@field and_then fun(cb: fun(x: TextChange)): nil run callback after promise is complete
---@class (exact) MaybeTextChangePromise : Promise
---@field await fun(self: MaybeTextChangePromise): TextChange? block until promise is ready and return value
---@field and_then fun(cb: fun(x: TextChange | nil)): nil run callback after promise is complete
-- [[ END ASYNC STUFF ]]
@ -307,7 +318,7 @@ local Codemp = {}
---connect to codemp server, authenticate and return client
function Codemp.connect(config) end
---@return function | nil
---@return function, any | nil
---@nodiscard
---check if codemp thread sent a callback to be run on main thread
function Codemp.poll_callback() end

180
src/ffi/lua.rs
View file

@ -47,13 +47,58 @@ fn lua_tuple<T: IntoLua>(lua: &Lua, (a, b): (T, T)) -> LuaResult<LuaTable> {
Ok(table)
}
// TODO cannot do Box<dyn IntoLuaMulti> ?? maybe its temporary because im using betas
#[allow(unused)] // TODO pass callback args!
//struct CallbackArg<T: IntoLuaMulti>(tokio::sync::oneshot::Receiver<T>);
struct CallbackArg;
enum CallbackArg {
Nil,
Str(String),
VecStr(Vec<String>),
Client(CodempClient),
CursorController(CodempCursorController),
BufferController(CodempBufferController),
Workspace(CodempWorkspace),
Event(CodempEvent),
Cursor(CodempCursor),
MaybeCursor(Option<CodempCursor>),
TextChange(CodempTextChange),
MaybeTextChange(Option<CodempTextChange>),
}
impl IntoLua for CallbackArg {
// TODO this basically calls .into_lua() on all enum variants
// i wish i could do this with a Box<dyn IntoLua> or an impl IntoLua
// but IntoLua requires Sized so it can't be made into an object
fn into_lua(self, lua: &Lua) -> LuaResult<LuaValue> {
match self {
CallbackArg::Nil => Ok(LuaValue::Nil),
CallbackArg::Str(x) => x.into_lua(lua),
CallbackArg::Client(x) => x.into_lua(lua),
CallbackArg::CursorController(x) => x.into_lua(lua),
CallbackArg::BufferController(x) => x.into_lua(lua),
CallbackArg::Workspace(x) => x.into_lua(lua),
CallbackArg::VecStr(x) => x.into_lua(lua),
CallbackArg::Event(x) => x.into_lua(lua),
CallbackArg::Cursor(x) => x.into_lua(lua),
CallbackArg::MaybeCursor(x) => x.into_lua(lua),
CallbackArg::TextChange(x) => x.into_lua(lua),
CallbackArg::MaybeTextChange(x) => x.into_lua(lua),
}
}
}
impl From<()> for CallbackArg { fn from(_: ()) -> Self { CallbackArg::Nil } }
impl From<String> for CallbackArg { fn from(value: String) -> Self { CallbackArg::Str(value) } }
impl From<CodempClient> for CallbackArg { fn from(value: CodempClient) -> Self { CallbackArg::Client(value) } }
impl From<CodempCursorController> for CallbackArg { fn from(value: CodempCursorController) -> Self { CallbackArg::CursorController(value) } }
impl From<CodempBufferController> for CallbackArg { fn from(value: CodempBufferController) -> Self { CallbackArg::BufferController(value) } }
impl From<CodempWorkspace> for CallbackArg { fn from(value: CodempWorkspace) -> Self { CallbackArg::Workspace(value) } }
impl From<Vec<String>> for CallbackArg { fn from(value: Vec<String>) -> Self { CallbackArg::VecStr(value) } }
impl From<CodempEvent> for CallbackArg { fn from(value: CodempEvent) -> Self { CallbackArg::Event(value) } }
impl From<CodempCursor> for CallbackArg { fn from(value: CodempCursor) -> Self { CallbackArg::Cursor(value) } }
impl From<Option<CodempCursor>> for CallbackArg { fn from(value: Option<CodempCursor>) -> Self { CallbackArg::MaybeCursor(value) } }
impl From<CodempTextChange> for CallbackArg { fn from(value: CodempTextChange) -> Self { CallbackArg::TextChange(value) } }
impl From<Option<CodempTextChange>> for CallbackArg { fn from(value: Option<CodempTextChange>) -> Self { CallbackArg::MaybeTextChange(value) } }
struct CallbackChannel {
tx: tokio::sync::mpsc::UnboundedSender<(LuaFunction, CallbackArg)>,
tx: std::sync::Arc<tokio::sync::mpsc::UnboundedSender<(LuaFunction, CallbackArg)>>,
rx: std::sync::Mutex<tokio::sync::mpsc::UnboundedReceiver<(LuaFunction, CallbackArg)>>
}
@ -62,31 +107,31 @@ impl Default for CallbackChannel {
let (tx, rx) = tokio::sync::mpsc::unbounded_channel();
let rx = std::sync::Mutex::new(rx);
Self {
tx, rx,
tx: std::sync::Arc::new(tx),
rx,
}
}
}
impl CallbackChannel {
fn send(&self, cb: LuaFunction, _arg: impl IntoLuaMulti) {
// let (tx, rx) = tokio::sync::oneshot::channel();
// tx.send(arg);
self.tx.send((cb, CallbackArg)).unwrap_or_warn("error scheduling callback")
fn send(&self, cb: LuaFunction, arg: impl Into<CallbackArg>) {
self.tx.send((cb, arg.into()))
.unwrap_or_warn("error scheduling callback")
}
fn recv(&self) -> Option<(LuaFunction, CallbackArg)> {
match self.rx.try_lock() {
Err(e) => {
tracing::warn!("could not acquire callback channel mutex: {e}");
None
},
Ok(mut lock) => match lock.try_recv() {
Ok(res) => Some(res),
Err(TryRecvError::Empty) => None,
Err(TryRecvError::Disconnected) => {
tracing::error!("callback channel closed");
None
},
},
Err(e) => {
tracing::warn!("could not acquire callback channel mutex: {e}");
None
Ok((cb, arg)) => Some((cb, arg)),
},
}
}
@ -99,9 +144,9 @@ lazy_static::lazy_static! {
struct Promise<T: Send + Sync + IntoLuaMulti>(Option<tokio::task::JoinHandle<LuaResult<T>>>);
struct Promise(Option<tokio::task::JoinHandle<LuaResult<CallbackArg>>>);
impl<T: Send + Sync + IntoLuaMulti + 'static> LuaUserData for Promise<T> {
impl LuaUserData for Promise {
fn add_fields<F: LuaUserDataFields<Self>>(fields: &mut F) {
fields.add_field_method_get("ready", |_, this|
Ok(this.0.as_ref().map_or(true, |x| x.is_finished()))
@ -118,24 +163,20 @@ impl<T: Send + Sync + IntoLuaMulti + 'static> LuaUserData for Promise<T> {
.map_err(LuaError::runtime)?
},
});
// methods.add_method_mut("and_then", |_, this, (cb,):(LuaFunction,)| match this.0.take() {
// None => Err(LuaError::runtime("Promise already awaited")),
// Some(x) => {
// tokio()
// .spawn(async move {
// match x.await {
// Err(e) => tracing::error!("could not join promise to run callback: {e}"),
// Ok(Err(e)) => tracing::error!("promise returned error: {e}"),
// Ok(Ok(res)) => {
// if let Err(e) = cb.call::<()>(res) {
// tracing::error!("error running promise callback: {e}");
// }
// },
// }
// });
// Ok(())
// },
// });
methods.add_method_mut("and_then", |_, this, (cb,):(LuaFunction,)| match this.0.take() {
None => Err(LuaError::runtime("Promise already awaited")),
Some(x) => {
tokio()
.spawn(async move {
match x.await {
Err(e) => tracing::error!("could not join promise to run callback: {e}"),
Ok(Err(e)) => tracing::error!("promise returned error: {e}"),
Ok(Ok(res)) => CHANNEL.send(cb, res),
}
});
Ok(())
},
});
}
}
@ -143,7 +184,7 @@ macro_rules! a_sync {
($($clone:ident)* => $x:expr) => {
{
$(let $clone = $clone.clone();)*
Ok(Promise(Some(tokio().spawn(async move { $x }))))
Ok(Promise(Some(tokio().spawn(async move { Ok(CallbackArg::from($x)) }))))
}
};
}
@ -206,27 +247,27 @@ impl LuaUserData for CodempClient {
methods.add_meta_method(LuaMetaMethod::ToString, |_, this, ()| Ok(format!("{:?}", this)));
methods.add_method("refresh", |_, this, ()|
a_sync! { this => Ok(this.refresh().await?) }
a_sync! { this => this.refresh().await? }
);
methods.add_method("join_workspace", |_, this, (ws,):(String,)|
a_sync! { this => Ok(this.join_workspace(ws).await?) }
a_sync! { this => this.join_workspace(ws).await? }
);
methods.add_method("create_workspace", |_, this, (ws,):(String,)|
a_sync! { this => Ok(this.create_workspace(ws).await?) }
a_sync! { this => this.create_workspace(ws).await? }
);
methods.add_method("delete_workspace", |_, this, (ws,):(String,)|
a_sync! { this => Ok(this.delete_workspace(ws).await?) }
a_sync! { this => this.delete_workspace(ws).await? }
);
methods.add_method("invite_to_workspace", |_, this, (ws,user):(String,String)|
a_sync! { this => Ok(this.invite_to_workspace(ws, user).await?) }
a_sync! { this => this.invite_to_workspace(ws, user).await? }
);
methods.add_method("list_workspaces", |_, this, (owned,invited):(Option<bool>,Option<bool>)|
a_sync! { this => Ok(this.list_workspaces(owned.unwrap_or(true), invited.unwrap_or(true)).await?) }
a_sync! { this => this.list_workspaces(owned.unwrap_or(true), invited.unwrap_or(true)).await? }
);
methods.add_method("leave_workspace", |_, this, (ws,):(String,)|
@ -242,11 +283,11 @@ impl LuaUserData for CodempWorkspace {
fn add_methods<M: LuaUserDataMethods<Self>>(methods: &mut M) {
methods.add_meta_method(LuaMetaMethod::ToString, |_, this, ()| Ok(format!("{:?}", this)));
methods.add_method("create", |_, this, (name,):(String,)|
a_sync! { this => Ok(this.create(&name).await?) }
a_sync! { this => this.create(&name).await? }
);
methods.add_method("attach", |_, this, (name,):(String,)|
a_sync! { this => Ok(this.attach(&name).await?) }
a_sync! { this => this.attach(&name).await? }
);
methods.add_method("detach", |_, this, (name,):(String,)|
@ -254,34 +295,22 @@ impl LuaUserData for CodempWorkspace {
);
methods.add_method("delete", |_, this, (name,):(String,)|
a_sync! { this => Ok(this.delete(&name).await?) }
a_sync! { this => this.delete(&name).await? }
);
methods.add_method("get_buffer", |_, this, (name,):(String,)| Ok(this.buffer_by_name(&name)));
methods.add_method("event", |_, this, ()|
a_sync! { this => Ok(this.event().await?) }
a_sync! { this => this.event().await? }
);
methods.add_method("fetch_buffers", |_, this, ()|
a_sync! { this => Ok(this.fetch_buffers().await?) }
a_sync! { this => this.fetch_buffers().await? }
);
methods.add_method("fetch_users", |_, this, ()|
a_sync! { this => Ok(this.fetch_users().await?) }
a_sync! { this => this.fetch_users().await? }
);
// methods.add_method("callback", |_, this, (cb,):(LuaFunction,)| {
// let _this = this.clone();
// tokio().spawn(async move {
// while let Ok(ev) = _this.event().await {
// if let Err(e) = cb.call::<()>(ev) {
// tracing::error!("error running workspace callback: {e}");
// }
// }
// });
// Ok(())
// });
methods.add_method("filetree", |_, this, (filter, strict,):(Option<String>, Option<bool>,)|
Ok(this.filetree(filter.as_deref(), strict.unwrap_or(false)))
);
@ -322,13 +351,13 @@ impl LuaUserData for CodempCursorController {
methods.add_meta_method(LuaMetaMethod::ToString, |_, this, ()| Ok(format!("{:?}", this)));
methods.add_method("send", |_, this, (cursor,):(CodempCursor,)|
a_sync! { this => Ok(this.send(cursor).await?) }
a_sync! { this => this.send(cursor).await? }
);
methods.add_method("try_recv", |_, this, ()|
a_sync! { this => Ok(this.try_recv().await?) }
a_sync! { this => this.try_recv().await? }
);
methods.add_method("recv", |_, this, ()| a_sync! { this => Ok(this.recv().await?) });
methods.add_method("poll", |_, this, ()| a_sync! { this => Ok(this.poll().await?) });
methods.add_method("recv", |_, this, ()| a_sync! { this => this.recv().await? });
methods.add_method("poll", |_, this, ()| a_sync! { this => this.poll().await? });
methods.add_method("stop", |_, this, ()| Ok(this.stop()));
@ -361,16 +390,16 @@ impl LuaUserData for CodempBufferController {
methods.add_meta_method(LuaMetaMethod::ToString, |_, this, ()| Ok(format!("{:?}", this)));
methods.add_method("send", |_, this, (change,): (CodempTextChange,)|
a_sync! { this => Ok(this.send(change).await?)}
a_sync! { this => this.send(change).await? }
);
methods.add_method("try_recv", |_, this, ()| a_sync! { this => Ok(this.try_recv().await?) });
methods.add_method("recv", |_, this, ()| a_sync! { this => Ok(this.recv().await?) });
methods.add_method("poll", |_, this, ()| a_sync! { this => Ok(this.poll().await?) });
methods.add_method("try_recv", |_, this, ()| a_sync! { this => this.try_recv().await? });
methods.add_method("recv", |_, this, ()| a_sync! { this => this.recv().await? });
methods.add_method("poll", |_, this, ()| a_sync! { this => this.poll().await? });
methods.add_method("stop", |_, this, ()| Ok(this.stop()));
methods.add_method("content", |_, this, ()| a_sync! { this => Ok(this.content().await?) });
methods.add_method("content", |_, this, ()| a_sync! { this => this.content().await? });
methods.add_method("clear_callback", |_, this, ()| { this.clear_callback(); Ok(()) });
methods.add_method("callback", |_, this, (cb,):(LuaFunction,)| {
@ -510,7 +539,7 @@ fn entrypoint(lua: &Lua) -> LuaResult<LuaTable> {
// entrypoint
exports.set("connect", lua.create_function(|_, (config,):(CodempConfig,)|
a_sync! { => Ok(CodempClient::connect(config).await?) }
a_sync! { => CodempClient::connect(config).await? }
)?)?;
// utils
@ -520,13 +549,14 @@ fn entrypoint(lua: &Lua) -> LuaResult<LuaTable> {
// runtime
exports.set("spawn_runtime_driver", lua.create_function(spawn_runtime_driver)?)?;
exports.set("poll_callback", lua.create_function(|_, ()| {
exports.set("poll_callback", lua.create_function(|lua, ()| {
// TODO pass args too
if let Some((cb, _arg)) = CHANNEL.recv() {
Ok(Some(cb))
} else {
Ok(None)
let mut val = LuaMultiValue::new();
if let Some((cb, arg)) = CHANNEL.recv() {
val.push_back(LuaValue::Function(cb));
val.push_back(arg.into_lua(lua)?);
}
Ok(val)
})?)?;
// logging