Resolving workspace dependency conflicts

1

Hello,

I have a workspace where one of the sub crates has iced 0.12.1 as a dependency, another separate crate has bevy 0.14.0 as a dependency. Iced requires web-sys 0.3.67, bevy requires web-sys 0.3.69. Rust is unable to resolve the dependencies. I'm a rust newbie, so I'm not sure if I should expect rust to resolve these dependency issues, if changing the workspace resolver settings would be appropriate, or if this is expected and I just need to revert bevy to a version that relied on 0.3.67. I could do that but just want to make sure I understand the best/right ways to resolve these dependency conflicts.

2024-07-15T17:29:50.869456Z ERROR rust_analyzer::main_loop: FetchWorkspaceError:
rust-analyzer failed to load workspace: Failed to load the project at C:\Users\jonda\Documents\Rust\gdt\Cargo.toml: Failed to read Cargo metadata from Cargo.toml file C:\Users\jonda\Documents\Rust\gdt\Cargo.toml, Some(Version { major: 1, minor: 79, patch: 0 }): Failed to run `"C:\\Users\\jonda\\.cargo\\bin\\cargo.exe" "metadata" "--format-version" "1" "--manifest-path" "C:\\Users\\jonda\\Documents\\Rust\\gdt\\Cargo.toml" "--filter-platform" "x86_64-pc-windows-msvc"`: `cargo metadata` exited with an error: warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
package:   C:\Users\jonda\Documents\Rust\gdt\gui\Cargo.toml
workspace: C:\Users\jonda\Documents\Rust\gdt\Cargo.toml
    Updating crates.io index
error: failed to select a version for `web-sys`.
    ... required by package `iced_winit v0.12.0`
    ... which satisfies dependency `iced_winit = "^0.12"` of package `iced v0.12.1`
    ... which satisfies dependency `iced = "^0.12.1"` of package `gdt v0.1.0 (C:\Users\jonda\Documents\Rust\gdt)`
versions that meet the requirements `=0.3.67` are: 0.3.67

all possible versions conflict with previously selected packages.

  previously selected package `web-sys v0.3.69`
    ... which satisfies dependency `web-sys = "^0.3.69"` of package `wgpu v0.20.1`
    ... which satisfies dependency `wgpu = "^0.20"` of package `bevy_render v0.14.0`
    ... which satisfies dependency `bevy_render = "^0.14.0"` of package `bevy_internal v0.14.0`
    ... which satisfies dependency `bevy_internal = "^0.14.0"` of package `bevy v0.14.0`
    ... which satisfies dependency `bevy = "^0.14.0"` of package `gdt v0.1.0 (C:\Users\jonda\Documents\Rust\gdt)`

failed to select a version for `web-sys` which could resolve this conflict
2

Cargo can never build two semver compatible versions of the same dependency, regardless of your workspace setup or the resolver. If you can revert bevy to a release that doesn't require ^0.3.69 but is compatible with 0.3.67, that sounds like a good option. Updating iced to a version that doesn't have the =0.3.67 pinned version requirement on web-sys would be the best solution, but alas, there is no such version of iced available.

3

Ok thanks. Glad I wasn't too far off.

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4

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