mirror of
https://github.com/pre-commit/pre-commit.git
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85 lines
2.5 KiB
Python
85 lines
2.5 KiB
Python
from __future__ import unicode_literals
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import contextlib
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import os.path
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import toml
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from pre_commit.envcontext import envcontext
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from pre_commit.envcontext import Var
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from pre_commit.languages import helpers
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from pre_commit.util import clean_path_on_failure
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from pre_commit.util import cmd_output
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from pre_commit.xargs import xargs
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ENVIRONMENT_DIR = 'rustenv'
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get_default_version = helpers.basic_get_default_version
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healthy = helpers.basic_healthy
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def get_env_patch(target_dir):
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return (
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(
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'PATH',
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(os.path.join(target_dir, 'bin'), os.pathsep, Var('PATH')),
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),
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)
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@contextlib.contextmanager
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def in_env(prefix):
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target_dir = prefix.path(
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helpers.environment_dir(ENVIRONMENT_DIR, 'default'),
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)
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with envcontext(get_env_patch(target_dir)):
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yield
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def _add_dependencies(cargo_toml_path, additional_dependencies):
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with open(cargo_toml_path, 'r+') as f:
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cargo_toml = toml.load(f)
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for dep in additional_dependencies:
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name, _, spec = dep.partition(':')
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cargo_toml['dependencies'][name] = spec or '*'
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f.seek(0)
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toml.dump(cargo_toml, f)
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f.truncate()
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def install_environment(prefix, version, additional_deps):
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helpers.assert_version_default('rust', version)
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directory = prefix.path(
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helpers.environment_dir(ENVIRONMENT_DIR, 'default'),
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)
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# There are two cases where we might want to specify more dependencies:
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# as dependencies for the library being built, and as binary packages
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# to be `cargo install`'d.
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#
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# Unlike e.g. Python, if we just `cargo install` a library, it won't be
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# used for compilation. And if we add a crate providing a binary to the
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# `Cargo.toml`, the binary won't be built.
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#
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# Because of this, we allow specifying "cli" dependencies by prefixing
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# with 'cli:'.
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cli_deps = {dep for dep in additional_deps if dep.startswith('cli:')}
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lib_deps = set(additional_deps) - cli_deps
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if len(lib_deps) > 0:
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_add_dependencies(prefix.path('Cargo.toml'), lib_deps)
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with clean_path_on_failure(directory):
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packages_to_install = {()} | {(dep[len('cli:'):],) for dep in cli_deps}
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for package in packages_to_install:
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cmd_output(
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'cargo', 'install', '--bins', '--root', directory, *package,
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cwd=prefix.prefix_dir
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)
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def run_hook(prefix, hook, file_args):
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with in_env(prefix):
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return xargs(helpers.to_cmd(hook), file_args)
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