What it does

If a package has a dependencies entry that specifies a source besides workspace = true, it fires

See also rust-lang/rust-clippy#10306

Advantage

For projects that want to be consistent on their dependencies across a workspace

Drawbacks

• Poor interaction between workspace dependencies and default-features #12162
• Packages cannot have different version requirements (Ability to inherit a dependency path while overriding the version requirement #15526)

Example

[dependencies]
serde = "1"

Could be written as:

[workspace.dependencies]
serde = "1"

[dependencies]
serde.workspace = true