crates_universe: no documentation on how to create and maintain Cargo.Bazel.lock

[roman-kashitsyn]

The docs describing cargo-free setup of crates_universe mention Cargo.Bazel.lock file:

crates_repository(
    name = "crate_index",
    lockfile = "//:Cargo.Bazel.lock",
    packages = {
        "async-trait": crate.spec(
            version = "0.1.51",
        ),
        "mockall": crate.spec(
            version = "0.10.2",
        ),
        "tokio": crate.spec(
            version = "1.12.0",
        ),
    },
    render_config = render_config(
        default_package_name = ""
    ),
)

The lockfile parameter is mandatory, but the doc does not explain how to create and maintain the Cargo.Bazel.lock file.
In the case of Cargo, Cargo.lock is automatically created and updated by cargo, no extra steps from users are required.

[UebelAndre]

Unfortuantely, as of right now you need to manually create the file before running Bazel. abrisco/cargo-bazel#112 was the issue tracking making that better but I can get a new one open in rules_rust too. Once the file is there, the rule will be able to update it when you repin dependencies.

[roman-kashitsyn]

Creating an empty file and re-running with CARGO_BAZEL_REPIN=true worked, thanks a lot!