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authorLibravatarLibravatar Biswakalyan Bhuyan <biswa@surgot.in> 2022-11-13 23:46:45 +0530
committerLibravatarLibravatar Biswakalyan Bhuyan <biswa@surgot.in> 2022-11-13 23:46:45 +0530
commit9468226a9e2e2ab8cdd599f1d8538e860ca86120 (patch)
tree0a77ada226d6db80639f96b438bf83e4e756edb5 /env/lib/python3.10/site-packages/setuptools/_vendor/jaraco/context.py
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diff --git a/env/lib/python3.10/site-packages/setuptools/_vendor/jaraco/context.py b/env/lib/python3.10/site-packages/setuptools/_vendor/jaraco/context.py
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+import os
+import subprocess
+import contextlib
+import functools
+import tempfile
+import shutil
+import operator
+
+
+@contextlib.contextmanager
+def pushd(dir):
+ orig = os.getcwd()
+ os.chdir(dir)
+ try:
+ yield dir
+ finally:
+ os.chdir(orig)
+
+
+@contextlib.contextmanager
+def tarball_context(url, target_dir=None, runner=None, pushd=pushd):
+ """
+ Get a tarball, extract it, change to that directory, yield, then
+ clean up.
+ `runner` is the function to invoke commands.
+ `pushd` is a context manager for changing the directory.
+ """
+ if target_dir is None:
+ target_dir = os.path.basename(url).replace('.tar.gz', '').replace('.tgz', '')
+ if runner is None:
+ runner = functools.partial(subprocess.check_call, shell=True)
+ # In the tar command, use --strip-components=1 to strip the first path and
+ # then
+ # use -C to cause the files to be extracted to {target_dir}. This ensures
+ # that we always know where the files were extracted.
+ runner('mkdir {target_dir}'.format(**vars()))
+ try:
+ getter = 'wget {url} -O -'
+ extract = 'tar x{compression} --strip-components=1 -C {target_dir}'
+ cmd = ' | '.join((getter, extract))
+ runner(cmd.format(compression=infer_compression(url), **vars()))
+ with pushd(target_dir):
+ yield target_dir
+ finally:
+ runner('rm -Rf {target_dir}'.format(**vars()))
+
+
+def infer_compression(url):
+ """
+ Given a URL or filename, infer the compression code for tar.
+ """
+ # cheat and just assume it's the last two characters
+ compression_indicator = url[-2:]
+ mapping = dict(gz='z', bz='j', xz='J')
+ # Assume 'z' (gzip) if no match
+ return mapping.get(compression_indicator, 'z')
+
+
+@contextlib.contextmanager
+def temp_dir(remover=shutil.rmtree):
+ """
+ Create a temporary directory context. Pass a custom remover
+ to override the removal behavior.
+ """
+ temp_dir = tempfile.mkdtemp()
+ try:
+ yield temp_dir
+ finally:
+ remover(temp_dir)
+
+
+@contextlib.contextmanager
+def repo_context(url, branch=None, quiet=True, dest_ctx=temp_dir):
+ """
+ Check out the repo indicated by url.
+
+ If dest_ctx is supplied, it should be a context manager
+ to yield the target directory for the check out.
+ """
+ exe = 'git' if 'git' in url else 'hg'
+ with dest_ctx() as repo_dir:
+ cmd = [exe, 'clone', url, repo_dir]
+ if branch:
+ cmd.extend(['--branch', branch])
+ devnull = open(os.path.devnull, 'w')
+ stdout = devnull if quiet else None
+ subprocess.check_call(cmd, stdout=stdout)
+ yield repo_dir
+
+
+@contextlib.contextmanager
+def null():
+ yield
+
+
+class ExceptionTrap:
+ """
+ A context manager that will catch certain exceptions and provide an
+ indication they occurred.
+
+ >>> with ExceptionTrap() as trap:
+ ... raise Exception()
+ >>> bool(trap)
+ True
+
+ >>> with ExceptionTrap() as trap:
+ ... pass
+ >>> bool(trap)
+ False
+
+ >>> with ExceptionTrap(ValueError) as trap:
+ ... raise ValueError("1 + 1 is not 3")
+ >>> bool(trap)
+ True
+
+ >>> with ExceptionTrap(ValueError) as trap:
+ ... raise Exception()
+ Traceback (most recent call last):
+ ...
+ Exception
+
+ >>> bool(trap)
+ False
+ """
+
+ exc_info = None, None, None
+
+ def __init__(self, exceptions=(Exception,)):
+ self.exceptions = exceptions
+
+ def __enter__(self):
+ return self
+
+ @property
+ def type(self):
+ return self.exc_info[0]
+
+ @property
+ def value(self):
+ return self.exc_info[1]
+
+ @property
+ def tb(self):
+ return self.exc_info[2]
+
+ def __exit__(self, *exc_info):
+ type = exc_info[0]
+ matches = type and issubclass(type, self.exceptions)
+ if matches:
+ self.exc_info = exc_info
+ return matches
+
+ def __bool__(self):
+ return bool(self.type)
+
+ def raises(self, func, *, _test=bool):
+ """
+ Wrap func and replace the result with the truth
+ value of the trap (True if an exception occurred).
+
+ First, give the decorator an alias to support Python 3.8
+ Syntax.
+
+ >>> raises = ExceptionTrap(ValueError).raises
+
+ Now decorate a function that always fails.
+
+ >>> @raises
+ ... def fail():
+ ... raise ValueError('failed')
+ >>> fail()
+ True
+ """
+
+ @functools.wraps(func)
+ def wrapper(*args, **kwargs):
+ with ExceptionTrap(self.exceptions) as trap:
+ func(*args, **kwargs)
+ return _test(trap)
+
+ return wrapper
+
+ def passes(self, func):
+ """
+ Wrap func and replace the result with the truth
+ value of the trap (True if no exception).
+
+ First, give the decorator an alias to support Python 3.8
+ Syntax.
+
+ >>> passes = ExceptionTrap(ValueError).passes
+
+ Now decorate a function that always fails.
+
+ >>> @passes
+ ... def fail():
+ ... raise ValueError('failed')
+
+ >>> fail()
+ False
+ """
+ return self.raises(func, _test=operator.not_)
+
+
+class suppress(contextlib.suppress, contextlib.ContextDecorator):
+ """
+ A version of contextlib.suppress with decorator support.
+
+ >>> @suppress(KeyError)
+ ... def key_error():
+ ... {}['']
+ >>> key_error()
+ """