fix: wasmer-cli - panic when command name shadows dependency entry

[Fliqqr]

Description

When a package defines a command whose name matches a command exposed by one of its dependencies, Wasmer can resolve the root command correctly but fail later while loading the package tree. In that case, the dependency package may not be fetched even though the root command’s atom annotation points into that dependency, causing the CLI to panic with a missing map entry instead of returning a normal error.

Reproduce with:

[package]
…
entrypoint = "webserver"

[dependencies]
"wasmer/static-web-server" = "^1"

[[command]]
name = "webserver"
module = "wasmer/static-web-server:webserver"
runner = "https://webc.org/runner/wasi"

Run:
wasmer run .

Changes

• Updated load_binary_command to return user friendly error when command resolving fails due to shadowing

• Replaced unchecked map indexing with contextual errors to avoid panics

• Added a regression test for the dependency command shadowing

• Re-enabled and updated the existing resolver test for shadowing

[Copilot]

Pull request overview

This PR addresses a wasmer run failure mode in WASIX package loading where a root command can shadow a dependency command name, yet still point at the dependency’s atom. The change updates package-tree loading and tests so shadowed dependency-backed commands are handled as errors instead of panicking.

Changes:

• Replaced unchecked package/command map indexing in package loading with contextual get(...).with_context(...) error paths.
• Added packages_needed_for_load() and updated dependency fetching so command owners’ direct dependencies are considered during load.
• Re-enabled the resolver shadowing test and added a regression-oriented package-loader test for the shadowed-command scenario.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
lib/wasix/src/runtime/resolver/resolve.rs	Re-enables and updates the resolver test for root-command shadowing behavior, including entrypoint expectations.
lib/wasix/src/runtime/package_loader/load_package_tree.rs	Changes dependency selection and command loading error handling, and adds a regression test around shadowed dependency commands.

[Arshia001]

I'll hold out on reviewing this until the comments from Copilot receive responses, since I find them valid but I'm not immediately super-familiar with this part of the code so I may be wrong.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.