I'm trying to set up lockfiles for tools, for instance black. I'm trying to do this in the new way, essentially following the docs but I'm getting an error on interpreter constraints not being a subset of those used to generate the lockfile. In pants.toml I have

[python]
interpreter_constraints = ["==3.9.*"]

[python.resolves_to_interpreter_constraints]
black = ["==3.9.*"]

valid_for_interpreter_constraints

in the lockfile is set to

CPython==3.9.*

, yet inputs use

CPython<4, >=3.7

according to the error. Using the deprecated way (i.e. lockfile in the [black] section works fine. Am I missing something? Where else should I be looking for potential mistakes? 🙏

Hmm, I wonder if this means that the docs are not informative enough?

this issue is specific to black (i.e., needs interpreter_constraints in its section to work), all other tools seem to work fine with the default in python section. So I'd rather say it's a confusing bug

Well, it works in the Pants repo itself, for example, so something about your specific setup requires specific interpreter constraints

[GLOBAL]
pants_version = "2.16.0"

backend_packages = [
 "pants.backend.build_files.fmt.black",
 "pants.backend.python",
 "pants.backend.python.lint.black",
 "pants.backend.python.lint.isort",
 "pants.backend.python.lint.bandit",
 "pants.backend.python.typecheck.mypy",
 "pants.backend.shell",
 "pants.backend.shell.lint.shfmt",
 "pants.backend.shell.lint.shellcheck",
 "pants.backend.experimental.terraform",
 "pants.backend.docker",
 "pants.backend.docker.lint.hadolint",
]

[environments-preview.names]
linux = "//:docker_x86_64"
local = "//:local_macos"

[python]
interpreter_constraints = ["==3.9.*"]
enable_resolves = true

[python.resolves]
python-default = "3rdparty/python/user_reqs.lock"
black = "3rdparty/python/black.lock"
bandit = "3rdparty/python/bandit.lock"

[python.resolves_to_interpreter_constraints]
python-default = ["==3.9.*"]

[python-bootstrap]
search_path = ["<PYENV>"]

[pytest]
install_from_resolve="python-default"

[black]
interpreter_constraints = ["==3.9.*"]
install_from_resolve="black"
requirements = ["//3rdparty/python:black"]

[bandit]
config = "pyproject.toml"
install_from_resolve="bandit"
requirements = ["//3rdparty/python:bandit"]

[mypy]
args = ["--explicit-package-bases"]
install_from_resolve="python-default"

here it is

Oh, and what are the inputs from which you generated the

black

resolve?

I have this BUILD file if that's what you mean

python_requirements(
    name="black",
    source="black-requirements.txt",
    resolve="black",
)

python_requirements(
    name="bandit",
    source="bandit-requirements.txt",
    resolve="bandit",
)

That is what I mean, thanks

I'll give it a try 👍