Problem with the Ldtk loader when running from another project

[LeCalicot]

Hi,

first, thanks for the great work, it looks promising! I'm new to bevy and rust, thanks for your patience. I was trying to adapt the ldtk map loading for my project and I encountered some issues. I think it's a bug, but not 100% sure.

First, to test it, I ran the actual ldtk_map.rs example from the cloned repo, it works fine. Then, I moved the example to main.rs. It still compiles fine. Then, I also linked to the online crates what I could.

At this point I have:

[package]
...
name = "bevy_retrograde"
...

[features]
default = ['ldtk']
ldtk = ["bevy_retrograde_ldtk"]

[dependencies]
bevy = {version = "0.5", default-features = false}

bevy_retrograde_core = {version = "0.2"}
bevy_retrograde_ldtk = {version = "0.2", optional = true}
bevy_retrograde_macros = {version = "0.2"}
hex = "0.4.3"

[dev-dependencies]
hex = "0.4.3"
rand = "0.8.3"

[profile.dev]
debug = 0
opt-level = 1

that I can run with cargo run. This runs fine. The _bevyretrograde is still loaded from the lib.rs !

Then I copy the exact same code (main.rs and Cargo.toml) to my project. The difference is that the lib.rs is not present, so I add the line: bevy_retrograde = "0.2" in the Cargo.toml file.

But somehow running the same code from my project, it still compiles fine, but when running it, it panics:

Finished dev [unoptimized] target(s) in 26.22s Runningtarget/debug/my_project Oct 02 21:25:26.869 WARN bevy_asset::asset_server: noAssetLoaderfound for the following extension: ldtk thread 'Compute Task Pool (4)' panicked at 'Requested resource does not exist: bevy_asset::assets::Assets<bevy_retrograde_ldtk::asset::LdtkMap>', /home/luc/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_ecs-0.5.0/src/system/system_param.rs:244:17 note: run withRUST_BACKTRACE=1environment variable to display a backtrace thread 'main' panicked at 'task has failed', /home/luc/.cargo/registry/src/github.com-1ecc6299db9ec823/async-task-4.0.3/src/task.rs:368:45

However, if I copy the lib.rs from the repo, it compiles and run fine (all the code is identical, so...yeah, makes sense ^^) if I include the lib:

[lib]
name = "bevy_retrograde"
path = "src/lib.rs"

Am I missing something or is there an issue with loading the ldtk plugin from the crate?

[zicklag]

Hey there!

Sorry for the delay, I've been unavailable for the last bit, but I'm going to test this out and see why it's not working as soon as I can. It should be a simple fix, one way or the other.

[zicklag]

I think I know what the problem is now. When creating a standalone project, you aren't meant to depend on the individual bevy_retrograde_[something] crates by themselves. You only need to depend on the bevy_retrograde crate. The bevy_retrograde crate is the one responsible for enabling certain Bevy plugins, which is why you are getting the panic.

I created a new project from scratch and created a GitHub gist with the Cargo.toml and main.rs file that I used and it worked fine. Let me know if this doesn't work for you!

https://gist.github.com/zicklag/06f7bd82afa81bc8f45b4e92ab866658

[LeCalicot]

That did the trick! Thanks for the help!