[konstde00]

CrateFilter::AllCrates never runs the plugin on dependencies. cli_main always sets RUSTC_WORKSPACE_WRAPPER (cli.rs:46), and Cargo applies that wrapper only to workspace members, so dependencies are compiled by plain rustc and never reach the run_on_all_crates check in the driver (driver.rs:134-141).

For AllCrates the CLI now sets RUSTC_WRAPPER instead, while OnlyWorkspace and CrateContainingFile keep RUSTC_WORKSPACE_WRAPPER. The driver doesn't need to change, because Cargo passes the rustc path as the first argument with either variable, and wrapper_mode already strips it. With RUSTC_WRAPPER the plugin also runs on build scripts and proc-macro crates of dependencies, and a wrapper the user set themselves (sccache, for example) gets replaced during AllCrates runs.

Tests

• New dependency test on workspaces/deps, a crate whose path dependency is not a workspace member. On main it fails because only the root crate's items are printed. With this change it passes.
• cargo clippy --all-features -- -D warnings, cargo test --all-features -- --test-threads=1, cargo doc with -D warnings and cargo fmt --all --check pass locally on nightly-2026-05-01 and in CI on my fork: https://github.com/konstde00/rustc_plugin/actions/runs/40108212927
• By hand: cargo print-all-items on a new crate that depends on itoa printed 3 items before and 69 after, including itoa's Buffer and Integer.

Fixes #19