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import contextlib
import os.path
from typing import Generator
from typing import Sequence
from typing import Set
from typing import Tuple
import toml
import pre_commit.constants as C
from pre_commit.envcontext import envcontext
from pre_commit.envcontext import PatchesT
from pre_commit.envcontext import Var
from pre_commit.hook import Hook
from pre_commit.languages import helpers
from pre_commit.prefix import Prefix
from pre_commit.util import clean_path_on_failure
from pre_commit.util import cmd_output_b
ENVIRONMENT_DIR = 'rustenv'
get_default_version = helpers.basic_get_default_version
healthy = helpers.basic_healthy
def get_env_patch(target_dir: str) -> PatchesT:
return (
('PATH', (os.path.join(target_dir, 'bin'), os.pathsep, Var('PATH'))),
)
@contextlib.contextmanager
def in_env(prefix: Prefix) -> Generator[None, None, None]:
target_dir = prefix.path(
helpers.environment_dir(ENVIRONMENT_DIR, C.DEFAULT),
)
with envcontext(get_env_patch(target_dir)):
yield
def _add_dependencies(
cargo_toml_path: str,
additional_dependencies: Set[str],
) -> None:
with open(cargo_toml_path, 'r+') as f:
cargo_toml = toml.load(f)
cargo_toml.setdefault('dependencies', {})
for dep in additional_dependencies:
name, _, spec = dep.partition(':')
cargo_toml['dependencies'][name] = spec or '*'
f.seek(0)
toml.dump(cargo_toml, f)
f.truncate()
def install_environment(
prefix: Prefix,
version: str,
additional_dependencies: Sequence[str],
) -> None:
helpers.assert_version_default('rust', version)
directory = prefix.path(
helpers.environment_dir(ENVIRONMENT_DIR, C.DEFAULT),
)
# There are two cases where we might want to specify more dependencies:
# as dependencies for the library being built, and as binary packages
# to be `cargo install`'d.
#
# Unlike e.g. Python, if we just `cargo install` a library, it won't be
# used for compilation. And if we add a crate providing a binary to the
# `Cargo.toml`, the binary won't be built.
#
# Because of this, we allow specifying "cli" dependencies by prefixing
# with 'cli:'.
cli_deps = {
dep for dep in additional_dependencies if dep.startswith('cli:')
}
lib_deps = set(additional_dependencies) - cli_deps
if len(lib_deps) > 0:
_add_dependencies(prefix.path('Cargo.toml'), lib_deps)
with clean_path_on_failure(directory):
packages_to_install: Set[Tuple[str, ...]] = {('--path', '.')}
for cli_dep in cli_deps:
cli_dep = cli_dep[len('cli:'):]
package, _, version = cli_dep.partition(':')
if version != '':
packages_to_install.add((package, '--version', version))
else:
packages_to_install.add((package,))
for args in packages_to_install:
cmd_output_b(
'cargo', 'install', '--bins', '--root', directory, *args,
cwd=prefix.prefix_dir,
)
def run_hook(
hook: Hook,
file_args: Sequence[str],
color: bool,
) -> Tuple[int, bytes]:
with in_env(hook.prefix):
return helpers.run_xargs(hook, hook.cmd, file_args, color=color)
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