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# Copyright 2019 The Meson development team
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import typing as T
import hashlib
from pathlib import Path, PurePath, PureWindowsPath
from .. import mlog
from . import ExtensionModule
from . import ModuleReturnValue
from ..mesonlib import MesonException
from ..interpreterbase import FeatureNew
from ..interpreterbase import stringArgs, noKwargs
if T.TYPE_CHECKING:
from ..interpreter import ModuleState
class FSModule(ExtensionModule):
def __init__(self, interpreter):
super().__init__(interpreter)
self.snippets.add('generate_dub_file')
def _absolute_dir(self, state: 'ModuleState', arg: str) -> Path:
"""
make an absolute path from a relative path, WITHOUT resolving symlinks
"""
return Path(state.source_root) / state.subdir / Path(arg).expanduser()
def _resolve_dir(self, state: 'ModuleState', arg: str) -> Path:
"""
resolves symlinks and makes absolute a directory relative to calling meson.build,
if not already absolute
"""
path = self._absolute_dir(state, arg)
try:
# accomodate unresolvable paths e.g. symlink loops
path = path.resolve()
except Exception:
# return the best we could do
pass
return path
def _check(self, check: str, state: 'ModuleState', args: T.Sequence[str]) -> ModuleReturnValue:
if len(args) != 1:
raise MesonException('fs.{} takes exactly one argument.'.format(check))
test_file = self._resolve_dir(state, args[0])
val = getattr(test_file, check)()
if isinstance(val, Path):
val = str(val)
return ModuleReturnValue(val, [])
@stringArgs
@noKwargs
@FeatureNew('fs.expanduser', '0.54.0')
def expanduser(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
if len(args) != 1:
raise MesonException('fs.expanduser takes exactly one argument.')
return ModuleReturnValue(str(Path(args[0]).expanduser()), [])
@stringArgs
@noKwargs
@FeatureNew('fs.is_absolute', '0.54.0')
def is_absolute(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
if len(args) != 1:
raise MesonException('fs.is_absolute takes exactly one argument.')
return ModuleReturnValue(PurePath(args[0]).is_absolute(), [])
@stringArgs
@noKwargs
@FeatureNew('fs.as_posix', '0.54.0')
def as_posix(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
"""
this function assumes you are passing a Windows path, even if on a Unix-like system
and so ALL '\' are turned to '/', even if you meant to escape a character
"""
if len(args) != 1:
raise MesonException('fs.as_posix takes exactly one argument.')
return ModuleReturnValue(PureWindowsPath(args[0]).as_posix(), [])
@stringArgs
@noKwargs
def exists(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
return self._check('exists', state, args)
@stringArgs
@noKwargs
def is_symlink(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
if len(args) != 1:
raise MesonException('fs.is_symlink takes exactly one argument.')
return ModuleReturnValue(self._absolute_dir(state, args[0]).is_symlink(), [])
@stringArgs
@noKwargs
def is_file(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
return self._check('is_file', state, args)
@stringArgs
@noKwargs
def is_dir(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
return self._check('is_dir', state, args)
@stringArgs
@noKwargs
def hash(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
if len(args) != 2:
raise MesonException('fs.hash takes exactly two arguments.')
file = self._resolve_dir(state, args[0])
if not file.is_file():
raise MesonException('{} is not a file and therefore cannot be hashed'.format(file))
try:
h = hashlib.new(args[1])
except ValueError:
raise MesonException('hash algorithm {} is not available'.format(args[1]))
mlog.debug('computing {} sum of {} size {} bytes'.format(args[1], file, file.stat().st_size))
h.update(file.read_bytes())
return ModuleReturnValue(h.hexdigest(), [])
@stringArgs
@noKwargs
def size(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
if len(args) != 1:
raise MesonException('fs.size takes exactly one argument.')
file = self._resolve_dir(state, args[0])
if not file.is_file():
raise MesonException('{} is not a file and therefore cannot be sized'.format(file))
try:
return ModuleReturnValue(file.stat().st_size, [])
except ValueError:
raise MesonException('{} size could not be determined'.format(args[0]))
@stringArgs
@noKwargs
def is_samepath(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
if len(args) != 2:
raise MesonException('fs.is_samepath takes exactly two arguments.')
file1 = self._resolve_dir(state, args[0])
file2 = self._resolve_dir(state, args[1])
if not file1.exists():
return ModuleReturnValue(False, [])
if not file2.exists():
return ModuleReturnValue(False, [])
try:
return ModuleReturnValue(file1.samefile(file2), [])
except OSError:
return ModuleReturnValue(False, [])
@stringArgs
@noKwargs
def replace_suffix(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
if len(args) != 2:
raise MesonException('fs.replace_suffix takes exactly two arguments.')
original = PurePath(args[0])
new = original.with_suffix(args[1])
return ModuleReturnValue(str(new), [])
@stringArgs
@noKwargs
def parent(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
if len(args) != 1:
raise MesonException('fs.parent takes exactly one argument.')
original = PurePath(args[0])
new = original.parent
return ModuleReturnValue(str(new), [])
@stringArgs
@noKwargs
def name(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
if len(args) != 1:
raise MesonException('fs.name takes exactly one argument.')
original = PurePath(args[0])
new = original.name
return ModuleReturnValue(str(new), [])
@stringArgs
@noKwargs
@FeatureNew('fs.stem', '0.54.0')
def stem(self, state: 'ModuleState', args: T.Sequence[str], kwargs: dict) -> ModuleReturnValue:
if len(args) != 1:
raise MesonException('fs.stem takes exactly one argument.')
original = PurePath(args[0])
new = original.stem
return ModuleReturnValue(str(new), [])
def initialize(*args, **kwargs) -> FSModule:
return FSModule(*args, **kwargs)
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