comparison tests/hghave.py @ 43819:e8a3bbffdc7d

tests: add test for Rust formatting

We enforce formatting for Python and C. It makes sense to do it
for Rust as well.

Since our rustfmt.toml relies on unstable rustfmt features, we
need to use a Nightly rustfmt with --unstable-features in order
for it to work. This is a bit hacky and I would prefer we remove
this requirement. But for now, this commit assumes this is the
way things must be and we go out of our way to detect and use the
rustfmt from the "nightly" toolchain, as installed via rustup.

We had to add some environment variables to the tests to make
the Rust binaries happy. Otherwise when running rustfmt we get
an error about no default toolchain being installed.

Differential Revision: https://phab.mercurial-scm.org/D7579

43818:ce088b38f92b

def has_pytype():
    pytypecmd = 'pytype --version'
    version = matchoutput(pytypecmd, b'[0-9a-b.]+')
    sv = distutils.version.StrictVersion
    return version and sv(_strpath(version.group(0))) >= sv('2019.10.17')

43819:e8a3bbffdc7d

def has_pytype():
    pytypecmd = 'pytype --version'
    version = matchoutput(pytypecmd, b'[0-9a-b.]+')
    sv = distutils.version.StrictVersion
    return version and sv(_strpath(version.group(0))) >= sv('2019.10.17')


@check("rustfmt", "rustfmt tool")
def has_rustfmt():
    # We use Nightly's rustfmt due to current unstable config options.
    return matchoutput(
        '`rustup which --toolchain nightly rustfmt` --version', b'rustfmt'
    )