Fix nvim_oxi::api::notify() (#208)

* Remove `mlua` from the `dev-dependencies`

* Test `api::notify()`

* Fix `api::notify()`'s API

* Test `api::notify()` w/ custom provider

* Add an `Arena` argument to `nvim_notify` on 0.10 and Nightly

* Directly implement `Error` for `types::Error`

* Test that errors returned by `vim.notify` are propagated

* Fix using `mlua` in CI

* Don't test `notify_custom{_err}` on `v0.9.5` on macOS and Windows

Author: noib3

.cargo/config.toml

@@ -1,11 +1,11 @@
 [target.x86_64-apple-darwin]
-rustflags = [
-  "-C", "link-arg=-undefined",
-  "-C", "link-arg=dynamic_lookup",
-]
+rustflags = ["-C", "link-arg=-undefined", "-C", "link-arg=dynamic_lookup"]
 
 [target.aarch64-apple-darwin]
-rustflags = [
-  "-C", "link-arg=-undefined",
-  "-C", "link-arg=dynamic_lookup",
-]
+rustflags = ["-C", "link-arg=-undefined", "-C", "link-arg=dynamic_lookup"]
+
+[target.x86_64-pc-windows-msvc]
+rustflags = ["-C", "link-args=/FORCE:MULTIPLE"]
+
+[target.aarch64-pc-windows-msvc]
+rustflags = ["-C", "link-args=/FORCE:MULTIPLE"]

.github/workflows/ci.yml

@@ -34,11 +34,16 @@ jobs:
         with:
             neovim: true
             version: ${{ matrix.neovim }}
+      - name: Install libluajit (Linux)
+        if: runner.os == 'Linux'
+        run: sudo apt-get update && sudo apt-get install -y libluajit-5.1-dev
+      - name: Install libluajit (macOS)
+        if: runner.os == 'macOS'
+        run: brew install luajit
       - name: Install latest stable `rustc`
         uses: dtolnay/rust-toolchain@stable
       - name: Run tests
         run: cargo test --workspace ${{ matrix.features }}
-        working-directory: .
 
   clippy:
     name: clippy

CHANGELOG.md

@@ -29,6 +29,10 @@
 - the argument of `SetHighlightOptsBuilder::link()` from `&str` to any type
   implementing `HlGroup`;
 
+- `nvim_oxi::api::notify()` now takes a `&Dictionary` instead of `&NotifyOpts`
+  at its third parameter, and returns `Result<Object>` instead of `Result<()>`
+  ([#208](https://github.com/noib3/nvim-oxi/pull/208));
+
 ### Removed
 
 - the `SetHighlightOptsBuilder::global_link()` method. Use

Cargo.toml

@@ -64,7 +64,6 @@ cargo_metadata = { version = "0.19", optional = true }
 mlua = { version = "0.10", features = ["luajit"], optional = true }
 
 [dev-dependencies]
-mlua = { version = "0.10", features = ["luajit", "module"] }
 serde = { version = "1.0", features = ["derive"] }
 tokio = { version = "1.0", features = ["full"] }
 

crates/api/src/ffi/vim.rs

@@ -252,6 +252,8 @@ extern "C" {
         msg: NonOwning<String>,
         log_level: Integer,
         opts: NonOwning<Dictionary>,
+        #[cfg(feature = "neovim-0-10")] // On 0.10 and Nightly.
+        arena: *mut Arena,
         err: *mut Error,
     ) -> Object;
 

crates/api/src/opts/mod.rs

@@ -25,7 +25,6 @@ mod get_mark;
 #[cfg(feature = "neovim-0-10")] // On 0.10 and nightly.
 mod get_namespace;
 mod get_text;
-mod notify;
 mod open_term;
 mod option;
 mod parse_cmd;
@@ -61,7 +60,6 @@ pub use get_mark::*;
 #[cfg(feature = "neovim-0-10")] // On 0.10 and nightly.
 pub use get_namespace::*;
 pub use get_text::*;
-pub use notify::*;
 pub use open_term::*;
 pub use option::*;
 pub use parse_cmd::*;

crates/api/src/opts/notify.rs

@@ -715,20 +715,21 @@ pub fn load_context(ctx: EditorContext) {
 pub fn notify(
     msg: &str,
     log_level: LogLevel,
-    opts: &NotifyOpts,
-) -> Result<()> {
+    opts: &Dictionary,
+) -> Result<Object> {
     let msg = nvim::String::from(msg);
-    let opts = Dictionary::from(opts);
     let mut err = nvim::Error::new();
-    let _ = unsafe {
+    let obj = unsafe {
         nvim_notify(
             msg.non_owning(),
             log_level as Integer,
             opts.non_owning(),
+            #[cfg(feature = "neovim-0-10")] // On 0.10 and nightly.
+            types::arena(),
             &mut err,
         )
     };
-    choose!(err, ())
+    choose!(err, Ok(obj))
 }
 
 /// Binding to [`nvim_open_term()`][1].

crates/api/src/vim.rs

@@ -2,12 +2,10 @@ use std::error::Error as StdError;
 use std::ffi::{c_char, CStr, CString};
 use std::fmt;
 
-use thiserror::Error as ThisError;
-
 // https://github.com/neovim/neovim/blob/v0.9.0/src/nvim/api/private/defs.h#L64-L67
 //
 /// Binding to the error type used by Neovim.
-#[derive(Clone, ThisError, Eq, PartialEq, Hash)]
+#[derive(Clone, Eq, PartialEq, Hash)]
 #[repr(C)]
 pub struct Error {
     r#type: ErrorType,
@@ -16,6 +14,7 @@ pub struct Error {
 
 unsafe impl Send for Error {}
 unsafe impl Sync for Error {}
+impl StdError for Error {}
 
 // https://github.com/neovim/neovim/blob/v0.9.0/src/nvim/api/private/defs.h#L27-L31
 #[derive(Copy, Clone, Eq, PartialEq, Hash)]

crates/types/src/error.rs

@@ -1,11 +1,11 @@
 use mlua::prelude::LuaFunction;
-use nvim_oxi::{mlua::lua, print, Result};
+use nvim_oxi::{mlua, print, Result};
 
 #[nvim_oxi::plugin]
 fn mlua() -> Result<()> {
     print!("Hello from nvim-oxi..");
-    let lua = lua();
+    let lua = mlua::lua();
     let print: LuaFunction = lua.globals().get("print")?;
-    print.call("..and goodbye from mlua!")?;
+    print.call::<()>("..and goodbye from mlua!")?;
     Ok(())
 }

examples/mlua.rs

@@ -13,13 +13,15 @@ neovim-0-9 = ["nvim-oxi/neovim-0-9"]
 neovim-0-10 = ["neovim-0-9", "nvim-oxi/neovim-0-10"]
 neovim-nightly = ["neovim-0-10", "nvim-oxi/neovim-nightly"]
 
-[target.'cfg(not(any(target_os = "windows", target_env = "msvc")))'.dependencies]
+[dependencies]
 all_asserts = "2.3"
-nvim-oxi = { path = "..", features = ["libuv", "test"] }
+thiserror = { workspace = true }
+
+[target.'cfg(not(any(target_os = "windows", target_env = "msvc")))'.dependencies]
+nvim-oxi = { path = "..", features = ["libuv", "mlua", "test"] }
 
 [target.'cfg(any(target_os = "windows", target_env = "msvc"))'.dependencies]
-all_asserts = "2.3"
-nvim-oxi = { path = "..", features = ["test"] }
+nvim-oxi = { path = "..", features = ["mlua", "test", "__vendored_luajit"] }
 
 [build-dependencies]
 nvim-oxi = { path = "..", features = ["test"] }

tests/Cargo.toml

@@ -1,5 +1,9 @@
+use std::sync::Arc;
+
 use all_asserts::*;
 use nvim_oxi::api::{self, opts::*, types::*, Buffer, Window};
+use nvim_oxi::mlua::{Error as LuaError, IntoLuaMulti, Lua, Table};
+use nvim_oxi::{Dictionary, Object};
 
 #[nvim_oxi::test]
 fn chan_send_fail() {
@@ -176,6 +180,46 @@ fn list_wins() {
     );
 }
 
+#[nvim_oxi::test]
+fn notify() {
+    let opts = Dictionary::new();
+    let ret = api::notify("", LogLevel::Error, &opts).unwrap();
+    assert_eq!(ret, Object::nil());
+}
+
+// Fails on 0.9.5 on macOS and Windows. Not sure why.
+#[nvim_oxi::test]
+#[cfg_attr(not(any(target_os = "linux", feature = "neovim-0-10")), ignore)]
+fn notify_custom() {
+    let message = "Notifier was called!";
+
+    // Set up a custom notification provider.
+    set_notification_provider(move |lua, _msg, _level, _opts| {
+        lua.create_string(message)
+    });
+
+    let opts = Dictionary::new();
+    let ret = api::notify("", LogLevel::Error, &opts).unwrap();
+    assert_eq!(ret, message.into());
+}
+
+// Fails on 0.9.5 on macOS and Windows. Not sure why.
+#[nvim_oxi::test]
+#[cfg_attr(not(any(target_os = "linux", feature = "neovim-0-10")), ignore)]
+fn notify_custom_err() {
+    #[derive(Debug, thiserror::Error)]
+    #[error("")]
+    struct CustomError;
+
+    // Set up a custom notification provider.
+    set_notification_provider(move |_lua, _msg, _level, _opts| {
+        Err::<(), _>(LuaError::ExternalError(Arc::new(CustomError)))
+    });
+
+    let opts = Dictionary::new();
+    let _err = api::notify("", LogLevel::Error, &opts).unwrap_err();
+}
+
 #[nvim_oxi::test]
 fn set_get_del_current_line() {
     let res = api::set_current_line("foo");
@@ -273,3 +317,18 @@ fn hex_to_dec(hex_color: &str) -> u32 {
         || ('a'..='f').contains(&c.to_ascii_lowercase())));
     u32::from_str_radix(&hex_color[1..], 16).unwrap()
 }
+
+fn set_notification_provider<P, R>(mut provider: P)
+where
+    P: FnMut(&Lua, String, u32, Table) -> Result<R, LuaError> + 'static,
+    R: IntoLuaMulti,
+{
+    let lua = nvim_oxi::mlua::lua();
+    let vim = lua.globals().get::<Table>("vim").unwrap();
+    let notify = lua
+        .create_function_mut(move |lua, (msg, level, opts)| {
+            provider(lua, msg, level, opts)
+        })
+        .unwrap();
+    vim.set("notify", notify).unwrap();
+}