Module paths 

Nothing of the build machine in a package: the build’s paths remapped to short fixed names (remapped_flags), and the built binary searched for what is left of them (search).

Cargo’s trim-paths isn’t stable on the pinned Rust, so the remapping is rustc’s --remap-path-prefix, passed through CARGO_ENCODED_RUSTFLAGS after the flags already in it or in RUSTFLAGS. That variable wins over the rustflags of a game’s .cargo/config.toml, which these builds then don’t get.

Constants

ENCODED

Cargo’s flags variable, its arguments separated by \x1f.

FOUND

What starts the error search’s finding gives: web::run returns it as text, and the web exporter tells it from a failed build by it.

Functions

cargo_home

CARGO_HOME, else .cargo in the home folder.

check_file

search on the file at file, as the error the package is refused with.

home

The home folder: HOME, else USERPROFILE.

needles

The paths a package must not hold: the home folder, CARGO_HOME and the roots (the project’s and the workspace’s).

outside

The packages the project at root builds from a path outside its workspace (the engine, when a game names it by path = "…"), each folder with its name, by cargo metadata. None if it doesn’t run.

remapped_flags

The value of ENCODED for a build with remaps: the flags already in encoded (that variable), else those in plain (RUSTFLAGS, split on white space), then a --remap-path-prefix for each remap.

remapped_flags_here

remapped_flags with this process’s variables.

remaps

The folders a release build is remapped from: the workspace’s root (to the package’s name), each package of outside (a folder outside the workspace that the build reads by a path, to its name), CARGO_HOME (/cargo), RUSTUP_HOME (/rustup) and the target folder (/target), in that order. rustc tries the last first, so a folder inside another one still gets its own name.

search

The first of needles that bytes hold, with either slash (or both) and in any case of its ASCII letters, as the needle is written. A path of fewer than two parts (/, C:\) is never looked for.