# Objective
- Update winit dependency to 0.29
## Changelog
### KeyCode changes
- Removed `ScanCode`, as it was [replaced by
KeyCode](https://github.com/rust-windowing/winit/blob/master/CHANGELOG.md#0292).
- `ReceivedCharacter.char` is now a `SmolStr`, [relevant
doc](https://docs.rs/winit/latest/winit/event/struct.KeyEvent.html#structfield.text).
- Changed most `KeyCode` values, and added more.
KeyCode has changed meaning. With this PR, it refers to physical
position on keyboard rather than the printed letter on keyboard keys.
In practice this means:
- On QWERTY keyboard layouts, nothing changes
- On any other keyboard layout, `KeyCode` no longer reflects the label
on key.
- This is "good". In bevy 0.12, when you used WASD for movement, users
with non-QWERTY keyboards couldn't play your game! This was especially
bad for non-latin keyboards. Now, WASD represents the physical keys. A
French player will press the ZQSD keys, which are near each other,
Kyrgyz players will use "Цфыв".
- This is "bad" as well. You can't know in advance what the label of the
key for input is. Your UI says "press WASD to move", even if in reality,
they should be pressing "ZQSD" or "Цфыв". You also no longer can use
`KeyCode` for text inputs. In any case, it was a pretty bad API for text
input. You should use `ReceivedCharacter` now instead.
### Other changes
- Use `web-time` rather than `instant` crate.
(https://github.com/rust-windowing/winit/pull/2836)
- winit did split `run_return` in `run_onDemand` and `pump_events`, I
did the same change in bevy_winit and used `pump_events`.
- Removed `return_from_run` from `WinitSettings` as `winit::run` now
returns on supported platforms.
- I left the example "return_after_run" as I think it's still useful.
- This winit change is done partly to allow to create a new window after
quitting all windows: https://github.com/emilk/egui/issues/1918 ; this
PR doesn't address.
- added `width` and `height` properties in the `canvas` from wasm
example
(https://github.com/bevyengine/bevy/pull/10702#discussion_r1420567168)
## Known regressions (important follow ups?)
- Provide an API for reacting when a specific key from current layout
was released.
- possible solutions: use winit::Key from winit::KeyEvent ; mapping
between KeyCode and Key ; or .
- We don't receive characters through alt+numpad (e.g. alt + 151 = "ù")
anymore ; reproduced on winit example "ime". maybe related to
https://github.com/rust-windowing/winit/issues/2945
- (windows) Window content doesn't refresh at all when resizing. By
reading https://github.com/rust-windowing/winit/issues/2900 ; I suspect
we should just fire a `window.request_redraw();` from `AboutToWait`, and
handle actual redrawing within `RedrawRequested`. I'm not sure how to
move all that code so I'd appreciate it to be a follow up.
- (windows) unreleased winit fix for using set_control_flow in
AboutToWait https://github.com/rust-windowing/winit/issues/3215 ; ⚠️ I'm
not sure what the implications are, but that feels bad 🤔
## Follow up
I'd like to avoid bloating this PR, here are a few follow up tasks
worthy of a separate PR, or new issue to track them once this PR is
closed, as they would either complicate reviews, or at risk of being
controversial:
- remove CanvasParentResizePlugin
(https://github.com/bevyengine/bevy/pull/10702#discussion_r1417068856)
- avoid mentionning explicitly winit in docs from bevy_window ?
- NamedKey integration on bevy_input:
https://github.com/rust-windowing/winit/pull/3143 introduced a new
NamedKey variant. I implemented it only on the converters but we'd
benefit making the same changes to bevy_input.
- Add more info in KeyboardInput
https://github.com/bevyengine/bevy/pull/10702#pullrequestreview-1748336313
- https://github.com/bevyengine/bevy/pull/9905 added a workaround on a
bug allegedly fixed by winit 0.29. We should check if it's still
necessary.
- update to raw_window_handle 0.6
- blocked by wgpu
- Rename `KeyCode` to `PhysicalKeyCode`
https://github.com/bevyengine/bevy/pull/10702#discussion_r1404595015
- remove `instant` dependency, [replaced
by](https://github.com/rust-windowing/winit/pull/2836) `web_time`), we'd
need to update to :
- fastrand >= 2.0
- [`async-executor`](https://github.com/smol-rs/async-executor) >= 1.7
- [`futures-lite`](https://github.com/smol-rs/futures-lite) >= 2.0
- Verify license, see
[discussion](https://github.com/bevyengine/bevy/pull/8745#discussion_r1402439800)
- we might be missing a short notice or description of changes made
- Consider using https://github.com/rust-windowing/cursor-icon directly
rather than vendoring it in bevy.
- investigate [this
unwrap](https://github.com/bevyengine/bevy/pull/8745#discussion_r1387044986)
(`winit_window.canvas().unwrap();`)
- Use more good things about winit's update
- https://github.com/bevyengine/bevy/pull/10689#issuecomment-1823560428
## Migration Guide
This PR should have one.
# Objective
Updates [`futures-lite`](https://github.com/smol-rs/futures-lite) in
bevy_tasks to the next major version (1 -> 2).
Also removes the duplication of `futures-lite`, as `async-fs` requires v
2, so there are currently 2 copies of futures-lite in the dependency
tree.
Futures-lite has received [a number of
updates](https://github.com/smol-rs/futures-lite/blob/master/CHANGELOG.md)
since bevy's current version `1.4`.
---------
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: Mike <mike.hsu@gmail.com>
# Objective
- Fix adding `#![allow(clippy::type_complexity)]` everywhere. like #9796
## Solution
- Use the new [lints] table that will land in 1.74
(https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#lints)
- inherit lint to the workspace, crates and examples.
```
[lints]
workspace = true
```
## Changelog
- Bump rust version to 1.74
- Enable lints table for the workspace
```toml
[workspace.lints.clippy]
type_complexity = "allow"
```
- Allow type complexity for all crates and examples
```toml
[lints]
workspace = true
```
---------
Co-authored-by: Martín Maita <47983254+mnmaita@users.noreply.github.com>
Preparing next release
This PR has been auto-generated
---------
Co-authored-by: Bevy Auto Releaser <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: François <mockersf@gmail.com>
Updates the requirements on
[async-io](https://github.com/smol-rs/async-io) to permit the latest
version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/smol-rs/async-io/releases">async-io's
releases</a>.</em></p>
<blockquote>
<h2>v2.0.0</h2>
<ul>
<li><strong>Breaking:</strong> <code>Async::new()</code> now takes types
that implement <code>AsFd</code>/<code>AsSocket</code> instead of
<code>AsRawFd</code>/<code>AsRawSocket</code>, in order to implement I/O
safety. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/142">#142</a>)</li>
<li><strong>Breaking:</strong> <code>Async::get_mut()</code>,
<code>Async::read_with_mut()</code> and
<code>Async::write_with_mut()</code> are now <code>unsafe</code>. The
underlying source is technically "borrowed" by the polling
instance, so moving it out would be unsound. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/142">#142</a>)</li>
<li>Expose miscellaneous <code>kqueue</code> filters in the
<code>os::kqueue</code> module. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/112">#112</a>)</li>
<li>Expose a way to get the underlying <code>Poller</code>'s file
descriptor on Unix. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/125">#125</a>)</li>
<li>Add a new <code>Async::new_nonblocking</code> method to allow users
to avoid duplicating an already nonblocking socket. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/159">#159</a>)</li>
<li>Remove the unused <code>fastrand</code> and <code>memchr</code>
dependencies. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/131">#131</a>)</li>
<li>Use <code>tracing</code> instead of <code>log</code>. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/140">#140</a>)</li>
<li>Support ESP-IDF. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/144">#144</a>)</li>
<li>Optimize the <code>block_on</code> function to reduce allocation,
leading to a slight performance improvement. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/149">#149</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/smol-rs/async-io/blob/master/CHANGELOG.md">async-io's
changelog</a>.</em></p>
<blockquote>
<h1>Version 2.0.0</h1>
<ul>
<li><strong>Breaking:</strong> <code>Async::new()</code> now takes types
that implement <code>AsFd</code>/<code>AsSocket</code> instead of
<code>AsRawFd</code>/<code>AsRawSocket</code>, in order to implement I/O
safety. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/142">#142</a>)</li>
<li><strong>Breaking:</strong> <code>Async::get_mut()</code>,
<code>Async::read_with_mut()</code> and
<code>Async::write_with_mut()</code> are now <code>unsafe</code>. The
underlying source is technically "borrowed" by the polling
instance, so moving it out would be unsound. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/142">#142</a>)</li>
<li>Expose miscellaneous <code>kqueue</code> filters in the
<code>os::kqueue</code> module. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/112">#112</a>)</li>
<li>Expose a way to get the underlying <code>Poller</code>'s file
descriptor on Unix. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/125">#125</a>)</li>
<li>Add a new <code>Async::new_nonblocking</code> method to allow users
to avoid duplicating an already nonblocking socket. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/159">#159</a>)</li>
<li>Remove the unused <code>fastrand</code> and <code>memchr</code>
dependencies. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/131">#131</a>)</li>
<li>Use <code>tracing</code> instead of <code>log</code>. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/140">#140</a>)</li>
<li>Support ESP-IDF. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/144">#144</a>)</li>
<li>Optimize the <code>block_on</code> function to reduce allocation,
leading to a slight performance improvement. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/149">#149</a>)</li>
</ul>
<h1>Version 1.13.0</h1>
<ul>
<li>Use <a
href="https://crates.io/crates/rustix/"><code>rustix</code></a> instead
of <a href="https://crates.io/crates/libc/"><code>libc</code></a>/<a
href="https://crates.io/crates/windows-sys/"><code>windows-sys</code></a>
for system calls (<a
href="https://redirect.github.com/smol-rs/async-io/issues/76">#76</a>)</li>
<li>Add a <code>will_fire</code> method to <code>Timer</code> to test if
it will ever fire (<a
href="https://redirect.github.com/smol-rs/async-io/issues/106">#106</a>)</li>
<li>Reduce syscalls in <code>Async::new</code> (<a
href="https://redirect.github.com/smol-rs/async-io/issues/107">#107</a>)</li>
<li>Improve the drop ergonomics of <code>Readable</code> and
<code>Writable</code> (<a
href="https://redirect.github.com/smol-rs/async-io/issues/109">#109</a>)</li>
<li>Change the "<code>wepoll</code>" in documentation to
"<code>IOCP</code>" (<a
href="https://redirect.github.com/smol-rs/async-io/issues/116">#116</a>)</li>
</ul>
<h1>Version 1.12.0</h1>
<ul>
<li>Switch from <code>winapi</code> to <code>windows-sys</code> (<a
href="https://redirect.github.com/smol-rs/async-io/issues/102">#102</a>)</li>
</ul>
<h1>Version 1.11.0</h1>
<ul>
<li>Update <code>concurrent-queue</code> to v2. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/99">#99</a>)</li>
</ul>
<h1>Version 1.10.0</h1>
<ul>
<li>Remove the dependency on the <code>once_cell</code> crate to restore
the MSRV. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/95">#95</a>)</li>
</ul>
<h1>Version 1.9.0</h1>
<ul>
<li>Fix panic on very large durations. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/87">#87</a>)</li>
<li>Add <code>Timer::never</code> (<a
href="https://redirect.github.com/smol-rs/async-io/issues/87">#87</a>)</li>
</ul>
<h1>Version 1.8.0</h1>
<ul>
<li>Implement I/O safety traits on Rust 1.63+ (<a
href="https://redirect.github.com/smol-rs/async-io/issues/84">#84</a>)</li>
</ul>
<h1>Version 1.7.0</h1>
<ul>
<li>Process timers set for exactly <code>now</code>. (<a
href="https://redirect.github.com/smol-rs/async-io/issues/73">#73</a>)</li>
</ul>
<h1>Version 1.6.0</h1>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="7e89eec4d1"><code>7e89eec</code></a>
v2.0.0</li>
<li><a
href="356431754c"><code>3564317</code></a>
tests: Add test for <a
href="https://redirect.github.com/smol-rs/async-io/issues/154">#154</a></li>
<li><a
href="a5da16f072"><code>a5da16f</code></a>
Expose Async::new_nonblocking</li>
<li><a
href="0f2af634d8"><code>0f2af63</code></a>
Avoid needless set_nonblocking calls</li>
<li><a
href="62e3454f38"><code>62e3454</code></a>
Migrate to Rust 2021 (<a
href="https://redirect.github.com/smol-rs/async-io/issues/160">#160</a>)</li>
<li><a
href="59ee2ea27c"><code>59ee2ea</code></a>
Use set_nonblocking in Async::new on Windows (<a
href="https://redirect.github.com/smol-rs/async-io/issues/157">#157</a>)</li>
<li><a
href="d5bc619021"><code>d5bc619</code></a>
Remove needless as_fd/as_socket calls (<a
href="https://redirect.github.com/smol-rs/async-io/issues/158">#158</a>)</li>
<li><a
href="0b5016e567"><code>0b5016e</code></a>
m: Replace socket2 calls with rustix</li>
<li><a
href="8c3c3bd80b"><code>8c3c3bd</code></a>
m: Optimize block_on by caching Parker and Waker</li>
<li><a
href="1b1466a6c1"><code>1b1466a</code></a>
Update this crate to use the new polling breaking changes (<a
href="https://redirect.github.com/smol-rs/async-io/issues/142">#142</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/smol-rs/async-io/compare/v1.13.0...v2.0.0">compare
view</a></li>
</ul>
</details>
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# Objective
Fixes#9625
## Solution
Adds `async-io` as an optional dependency of `bevy_tasks`. When enabled,
this causes calls to `futures_lite::future::block_on` to be replaced
with calls to `async_io::block_on`.
---
## Changelog
- Added a new `async-io` feature to `bevy_tasks`. When enabled, this
causes `bevy_tasks` to use `async-io`'s implemention of `block_on`
instead of `futures-lite`'s implementation. You should enable this if
you use `async-io` in your application.
# Objective
Fixes#9113
## Solution
disable `multi-threaded` default feature
## Migration Guide
The `multi-threaded` feature in `bevy_ecs` and `bevy_tasks` is no longer
enabled by default. However, this remains a default feature for the
umbrella `bevy` crate. If you depend on `bevy_ecs` or `bevy_tasks`
directly, you should consider enabling this to allow systems to run in
parallel.
CI-capable version of #9086
---------
Co-authored-by: Bevy Auto Releaser <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: François <mockersf@gmail.com>
I created this manually as Github didn't want to run CI for the
workflow-generated PR. I'm guessing we didn't hit this in previous
releases because we used bors.
Co-authored-by: Bevy Auto Releaser <41898282+github-actions[bot]@users.noreply.github.com>
# Objective
Fixes#6689.
## Solution
Add `single-threaded` as an optional non-default feature to `bevy_ecs`
and `bevy_tasks` that:
- disable the `ParallelExecutor` as a default runner
- disables the multi-threaded `TaskPool`
- internally replace `QueryParIter::for_each` calls with
`Query::for_each`.
Removed the `Mutex` and `Arc` usage in the single-threaded task pool.
## Future Work/TODO
Create type aliases for `Mutex`, `Arc` that change to single-threaaded
equivalents where possible.
---
## Changelog
Added: Optional default feature `multi-theaded` to that enables
multithreaded parallelism in the engine. Disabling it disables all
multithreading in exchange for higher single threaded performance. Does
nothing on WASM targets.
---------
Co-authored-by: Carter Anderson <mcanders1@gmail.com>
# Objective
Attempting to build `bevy_tasks` produces the following error:
```
error[E0599]: no method named `is_finished` found for struct `async_executor::Task` in the current scope
--> /[...]]/bevy/crates/bevy_tasks/src/task.rs:51:16
|
51 | self.0.is_finished()
| ^^^^^^^^^^^ method not found in `async_executor::Task<T>`
```
It looks like this was introduced along with `Task::is_finished`, which delegates to `async_task::Task::is_finished`. However, the latter was only introduced in `async-task` 4.2.0; `bevy_tasks` does not explicitly depend on `async-task` but on `async-executor` ^1.3.0, which in turn depends on `async-task` ^4.0.0.
## Solution
Add an explicit dependency on `async-task` ^4.2.0.
# Objective
- Add ability to create nested spawns. This is needed for stageless. The current executor spawns tasks for each system early and runs the system by communicating through a channel. In stageless we want to spawn the task late, so that archetypes can be updated right before the task is run. The executor is run on a separate task, so this enables the scope to be passed to the spawned executor.
- Fixes#4301
## Solution
- Instantiate a single threaded executor on the scope and use that instead of the LocalExecutor. This allows the scope to be Send, but still able to spawn tasks onto the main thread the scope is run on. This works because while systems can access nonsend data. The systems themselves are Send. Because of this change we lose the ability to spawn nonsend tasks on the scope, but I don't think this is being used anywhere. Users would still be able to use spawn_local on TaskPools.
- Steals the lifetime tricks the `std:🧵:scope` uses to allow nested spawns, but disallow scope to be passed to tasks or threads not associated with the scope.
- Change the storage for the tasks to a `ConcurrentQueue`. This is to allow a &Scope to be passed for spawning instead of a &mut Scope. `ConcurrentQueue` was chosen because it was already in our dependency tree because `async_executor` depends on it.
- removed the optimizations for 0 and 1 spawned tasks. It did improve those cases, but made the cases of more than 1 task slower.
---
## Changelog
Add ability to nest spawns
```rust
fn main() {
let pool = TaskPool::new();
pool.scope(|scope| {
scope.spawn(async move {
// calling scope.spawn from an spawn task was not possible before
scope.spawn(async move {
// do something
});
});
})
}
```
## Migration Guide
If you were using explicit lifetimes and Passing Scope you'll need to specify two lifetimes now.
```rust
fn scoped_function<'scope>(scope: &mut Scope<'scope, ()>) {}
// should become
fn scoped_function<'scope>(scope: &Scope<'_, 'scope, ()>) {}
```
`scope.spawn_local` changed to `scope.spawn_on_scope` this should cover cases where you needed to run tasks on the local thread, but does not cover spawning Nonsend Futures.
## TODO
* [x] think real hard about all the lifetimes
* [x] add doc about what 'env and 'scope mean.
* [x] manually check that the single threaded task pool still works
* [x] Get updated perf numbers
* [x] check and make sure all the transmutes are necessary
* [x] move commented out test into a compile fail test
* [x] look through the tests for scope on std and see if I should add any more tests
Co-authored-by: Michael Hsu <myhsu@benjaminelectric.com>
Co-authored-by: Carter Anderson <mcanders1@gmail.com>
# Objective
As of Rust 1.59, `std:🧵:available_parallelism` has been stabilized. As of Rust 1.61, the API matches `num_cpus::get` by properly handling Linux's cgroups and other sandboxing mechanisms.
As bevy does not have an established MSRV, we can replace `num_cpus` in `bevy_tasks` and reduce our dependency tree by one dep.
## Solution
Replace `num_cpus` with `std:🧵:available_parallelism`. Wrap it to have a fallback in the case it errors out and have it operate in the same manner as `num_cpus` did.
This however removes `physical_core_count` from the API, though we are currently not using it in any way in first-party crates.
---
## Changelog
Changed: `bevy_tasks::logical_core_count` -> `bevy_tasks::available_parallelism`.
Removed: `bevy_tasks::physical_core_count`.
## Migration Guide
`bevy_tasks::logical_core_count` and `bevy_tasks::physical_core_count` have been removed. `logical_core_count` has been replaced with `bevy_tasks::available_parallelism`, which works identically. If `bevy_tasks::physical_core_count` is required, the `num_cpus` crate can be used directly, as these two were just aliases for `num_cpus` APIs.
Right now, a direct reference to the target TaskPool is required to launch tasks on the pools, despite the three newtyped pools (AsyncComputeTaskPool, ComputeTaskPool, and IoTaskPool) effectively acting as global instances. The need to pass a TaskPool reference adds notable friction to spawning subtasks within existing tasks. Possible use cases for this may include chaining tasks within the same pool like spawning separate send/receive I/O tasks after waiting on a network connection to be established, or allowing cross-pool dependent tasks like starting dependent multi-frame computations following a long I/O load.
Other task execution runtimes provide static access to spawning tasks (i.e. `tokio::spawn`), which is notably easier to use than the reference passing required by `bevy_tasks` right now.
This PR makes does the following:
* Adds `*TaskPool::init` which initializes a `OnceCell`'ed with a provided TaskPool. Failing if the pool has already been initialized.
* Adds `*TaskPool::get` which fetches the initialized global pool of the respective type or panics. This generally should not be an issue in normal Bevy use, as the pools are initialized before they are accessed.
* Updated default task pool initialization to either pull the global handles and save them as resources, or if they are already initialized, pull the a cloned global handle as the resource.
This should make it notably easier to build more complex task hierarchies for dependent tasks. It should also make writing bevy-adjacent, but not strictly bevy-only plugin crates easier, as the global pools ensure it's all running on the same threads.
One alternative considered is keeping a thread-local reference to the pool for all threads in each pool to enable the same `tokio::spawn` interface. This would spawn tasks on the same pool that a task is currently running in. However this potentially leads to potential footgun situations where long running blocking tasks run on `ComputeTaskPool`.
# Objective
Fixes#1529
Run bevy_ecs in miri
## Solution
- Don't set thread names when running in miri rust-lang/miri/issues/1717
- Update `event-listener` to `2.5.2` as previous versions have UB that is detected by miri: [event-listener commit](1fa31c553e)
- Ignore memory leaks when running in miri as they are impossible to track down rust-lang/miri/issues/1481
- Make `table_add_remove_many` test less "many" because miri is really quite slow :)
- Make CI run `RUSTFLAGS="-Zrandomize-layout" MIRIFLAGS="-Zmiri-ignore-leaks -Zmiri-tag-raw-pointers -Zmiri-disable-isolation" cargo +nightly miri test -p bevy_ecs`
# Objective
- Document that the error codes will be rendered on the bevy website (see bevyengine/bevy-website#216)
- Some Cargo.toml files did not include the license or a description field
## Solution
- Readme for the errors crate
- Mark internal/development crates with `publish = false`
- Add missing license/descriptions to some crates
- [x] merge bevyengine/bevy-website#216
Objective
During work on #3009 I've found that not all jobs use actions-rs, and therefore, an previous version of Rust is used for them. So while compilation and other stuff can pass, checking markup and Android build may fail with compilation errors.
Solution
This PR adds `action-rs` for any job running cargo, and updates the edition to 2021.
This relicenses Bevy under the dual MIT or Apache-2.0 license. For rationale, see #2373.
* Changes the LICENSE file to describe the dual license. Moved the MIT license to docs/LICENSE-MIT. Added the Apache-2.0 license to docs/LICENSE-APACHE. I opted for this approach over dumping both license files at the root (the more common approach) for a number of reasons:
* Github links to the "first" license file (LICENSE-APACHE) in its license links (you can see this in the wgpu and rust-analyzer repos). People clicking these links might erroneously think that the apache license is the only option. Rust and Amethyst both use COPYRIGHT or COPYING files to solve this problem, but this creates more file noise (if you do everything at the root) and the naming feels way less intuitive.
* People have a reflex to look for a LICENSE file. By providing a single license file at the root, we make it easy for them to understand our licensing approach.
* I like keeping the root clean and noise free
* There is precedent for putting the apache and mit license text in sub folders (amethyst)
* Removed the `Copyright (c) 2020 Carter Anderson` copyright notice from the MIT license. I don't care about this attribution, it might make license compliance more difficult in some cases, and it didn't properly attribute other contributors. We shoudn't replace it with something like "Copyright (c) 2021 Bevy Contributors" because "Bevy Contributors" is not a legal entity. Instead, we just won't include the copyright line (which has precedent ... Rust also uses this approach).
* Updates crates to use the new "MIT OR Apache-2.0" license value
* Removes the old legion-transform license file from bevy_transform. bevy_transform has been its own, fully custom implementation for a long time and that license no longer applies.
* Added a License section to the main readme
* Updated our Bevy Plugin licensing guidelines.
As a follow-up we should update the website to properly describe the new license.
Closes#2373
This was tested using cargo generate-lockfile -Zminimal-versions.
The following indirect dependencies also have minimal version
dependencies. For at least num, rustc-serialize and rand this is
necessary to compile on rustc versions that are not older than 1.0.
* num = "0.1.27"
* rustc-serialize = "0.3.20"
* termcolor = "1.0.4"
* libudev-sys = "0.1.1"
* rand = "0.3.14"
* ab_glyph = "0.2.7
Based on https://github.com/bevyengine/bevy/pull/2455
# Objective
Reduce compilation time
# Solution
Remove unused dependencies. While this PR doesn't remove any crates from `Cargo.lock`, it may unlock more build parallelism.
* Switch from the deprecated `multitask` crate to `async-executor`
* async-executor appears to be essentially multitask 0.3
* use block_on in futures_lite instead of pollster because futures_lite is already in the dependency list of async-executor
