comparison tests/hghave.py @ 45553:952f9d37002c

rust-tests: add test to check if `Cargo.lock` is up-to-date

An out-of-date `Cargo.lock` is the source of rebase conflicts, prevents a
reproductible build, introduces desync between the series that introduces a
change in dependencies and the one that eventually commits the `Cargo.lock`,
and is just a general annoyance.

This commit demonstrates that the test works, the next one fixes the
currently out-of-date `Cargo.lock`.

Differential Revision: https://phab.mercurial-scm.org/D9079

45552:10284ce3d5ed

    return matchoutput(
        '`rustup which --toolchain nightly rustfmt` --version', b'rustfmt'
    )


@check("lzma", "python lzma module")
def has_lzma():
    try:
        import _lzma

45553:952f9d37002c

    return matchoutput(
        '`rustup which --toolchain nightly rustfmt` --version', b'rustfmt'
    )


@check("cargo", "cargo tool")
def has_cargo():
    return matchoutput('`rustup which cargo` --version', b'cargo')


@check("lzma", "python lzma module")
def has_lzma():
    try:
        import _lzma