Checks if a file with any of the default README file names exists in the package root.
If so, returns a String
representing that name.
See also bin/cargo/commands/run.rs
s is_manifest_command
Prepares the manifest for publishing.
Loads a Cargo.toml
from a file on disk.
Checks a list of build targets, and ensures the target names are unique within a vector.
If not, the name of the offending build target is returned.
Checks stytax validity and unstable feature gate for a given profile.
Validates a profile.
Validation that is specific to an override.
Checks syntax validity and unstable feature gate for each profile.
Warn about paths that have been deprecated and may conflict.