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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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tree10027f336435511475e392454359edea8e25895d /testing/mozharness/mozfile/mozfile.py
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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diff --git a/testing/mozharness/mozfile/mozfile.py b/testing/mozharness/mozfile/mozfile.py
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+# -*- coding: utf-8 -*-
+
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from contextlib import contextmanager
+import os
+import shutil
+import stat
+import tarfile
+import tempfile
+import urlparse
+import urllib2
+import zipfile
+import time
+
+__all__ = ['extract_tarball',
+ 'extract_zip',
+ 'extract',
+ 'is_url',
+ 'load',
+ 'remove',
+ 'rmtree',
+ 'tree',
+ 'NamedTemporaryFile',
+ 'TemporaryDirectory']
+
+try:
+ WindowsError
+except NameError:
+ WindowsError = None # so we can unconditionally catch it later...
+
+
+### utilities for extracting archives
+
+def extract_tarball(src, dest):
+ """extract a .tar file"""
+
+ bundle = tarfile.open(src)
+ namelist = bundle.getnames()
+
+ for name in namelist:
+ bundle.extract(name, path=dest)
+ bundle.close()
+ return namelist
+
+
+def extract_zip(src, dest):
+ """extract a zip file"""
+
+ if isinstance(src, zipfile.ZipFile):
+ bundle = src
+ else:
+ try:
+ bundle = zipfile.ZipFile(src)
+ except Exception, e:
+ print "src: %s" % src
+ raise
+
+ namelist = bundle.namelist()
+
+ for name in namelist:
+ filename = os.path.realpath(os.path.join(dest, name))
+ if name.endswith('/'):
+ if not os.path.isdir(filename):
+ os.makedirs(filename)
+ else:
+ path = os.path.dirname(filename)
+ if not os.path.isdir(path):
+ os.makedirs(path)
+ _dest = open(filename, 'wb')
+ _dest.write(bundle.read(name))
+ _dest.close()
+ mode = bundle.getinfo(name).external_attr >> 16 & 0x1FF
+ os.chmod(filename, mode)
+ bundle.close()
+ return namelist
+
+
+def extract(src, dest=None):
+ """
+ Takes in a tar or zip file and extracts it to dest
+
+ If dest is not specified, extracts to os.path.dirname(src)
+
+ Returns the list of top level files that were extracted
+ """
+
+ assert os.path.exists(src), "'%s' does not exist" % src
+
+ if dest is None:
+ dest = os.path.dirname(src)
+ elif not os.path.isdir(dest):
+ os.makedirs(dest)
+ assert not os.path.isfile(dest), "dest cannot be a file"
+
+ if zipfile.is_zipfile(src):
+ namelist = extract_zip(src, dest)
+ elif tarfile.is_tarfile(src):
+ namelist = extract_tarball(src, dest)
+ else:
+ raise Exception("mozfile.extract: no archive format found for '%s'" %
+ src)
+
+ # namelist returns paths with forward slashes even in windows
+ top_level_files = [os.path.join(dest, name.rstrip('/')) for name in namelist
+ if len(name.rstrip('/').split('/')) == 1]
+
+ # namelist doesn't include folders, append these to the list
+ for name in namelist:
+ index = name.find('/')
+ if index != -1:
+ root = os.path.join(dest, name[:index])
+ if root not in top_level_files:
+ top_level_files.append(root)
+
+ return top_level_files
+
+
+### utilities for removal of files and directories
+
+def rmtree(dir):
+ """Deprecated wrapper method to remove a directory tree.
+
+ Ensure to update your code to use mozfile.remove() directly
+
+ :param dir: directory to be removed
+ """
+
+ return remove(dir)
+
+
+def remove(path):
+ """Removes the specified file, link, or directory tree
+
+ This is a replacement for shutil.rmtree that works better under
+ windows.
+
+ :param path: path to be removed
+ """
+
+ def _call_with_windows_retry(func, path, retry_max=5, retry_delay=0.5):
+ """
+ It's possible to see spurious errors on Windows due to various things
+ keeping a handle to the directory open (explorer, virus scanners, etc)
+ So we try a few times if it fails with a known error.
+ """
+ retry_count = 0
+ while True:
+ try:
+ func(path)
+ break
+ except WindowsError as e:
+ # Error 5 == Access is denied
+ # Error 32 == The process cannot access the file because it is
+ # being used by another process
+ # Error 145 == The directory is not empty
+
+ if retry_count == retry_max or e.winerror not in [5, 32, 145]:
+ raise
+ retry_count += 1
+
+ print 'Retrying to remove "%s" because it is in use.' % path
+ time.sleep(retry_delay)
+
+ if not os.path.exists(path):
+ return
+
+ path_stats = os.stat(path)
+
+ if os.path.isfile(path) or os.path.islink(path):
+ # Verify the file or link is read/write for the current user
+ os.chmod(path, path_stats.st_mode | stat.S_IRUSR | stat.S_IWUSR)
+ _call_with_windows_retry(os.remove, path)
+
+ elif os.path.isdir(path):
+ # Verify the directory is read/write/execute for the current user
+ os.chmod(path, path_stats.st_mode | stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)
+ _call_with_windows_retry(shutil.rmtree, path)
+
+def depth(directory):
+ """returns the integer depth of a directory or path relative to '/' """
+
+ directory = os.path.abspath(directory)
+ level = 0
+ while True:
+ directory, remainder = os.path.split(directory)
+ level += 1
+ if not remainder:
+ break
+ return level
+
+# ASCII delimeters
+ascii_delimeters = {
+ 'vertical_line' : '|',
+ 'item_marker' : '+',
+ 'last_child' : '\\'
+ }
+
+# unicode delimiters
+unicode_delimeters = {
+ 'vertical_line' : '│',
+ 'item_marker' : '├',
+ 'last_child' : '└'
+ }
+
+def tree(directory,
+ item_marker=unicode_delimeters['item_marker'],
+ vertical_line=unicode_delimeters['vertical_line'],
+ last_child=unicode_delimeters['last_child'],
+ sort_key=lambda x: x.lower()):
+ """
+ display tree directory structure for `directory`
+ """
+
+ retval = []
+ indent = []
+ last = {}
+ top = depth(directory)
+
+ for dirpath, dirnames, filenames in os.walk(directory, topdown=True):
+
+ abspath = os.path.abspath(dirpath)
+ basename = os.path.basename(abspath)
+ parent = os.path.dirname(abspath)
+ level = depth(abspath) - top
+
+ # sort articles of interest
+ for resource in (dirnames, filenames):
+ resource[:] = sorted(resource, key=sort_key)
+
+ files_end = item_marker
+ dirpath_marker = item_marker
+
+ if level > len(indent):
+ indent.append(vertical_line)
+ indent = indent[:level]
+
+ if dirnames:
+ files_end = item_marker
+ last[abspath] = dirnames[-1]
+ else:
+ files_end = last_child
+
+ if last.get(parent) == os.path.basename(abspath):
+ # last directory of parent
+ dirpath_mark = last_child
+ indent[-1] = ' '
+ elif not indent:
+ dirpath_mark = ''
+ else:
+ dirpath_mark = item_marker
+
+ # append the directory and piece of tree structure
+ # if the top-level entry directory, print as passed
+ retval.append('%s%s%s'% (''.join(indent[:-1]),
+ dirpath_mark,
+ basename if retval else directory))
+ # add the files
+ if filenames:
+ last_file = filenames[-1]
+ retval.extend([('%s%s%s' % (''.join(indent),
+ files_end if filename == last_file else item_marker,
+ filename))
+ for index, filename in enumerate(filenames)])
+
+ return '\n'.join(retval)
+
+
+### utilities for temporary resources
+
+class NamedTemporaryFile(object):
+ """
+ Like tempfile.NamedTemporaryFile except it works on Windows
+ in the case where you open the created file a second time.
+
+ This behaves very similarly to tempfile.NamedTemporaryFile but may
+ not behave exactly the same. For example, this function does not
+ prevent fd inheritance by children.
+
+ Example usage:
+
+ with NamedTemporaryFile() as fh:
+ fh.write(b'foobar')
+
+ print('Filename: %s' % fh.name)
+
+ see https://bugzilla.mozilla.org/show_bug.cgi?id=821362
+ """
+ def __init__(self, mode='w+b', bufsize=-1, suffix='', prefix='tmp',
+ dir=None, delete=True):
+
+ fd, path = tempfile.mkstemp(suffix, prefix, dir, 't' in mode)
+ os.close(fd)
+
+ self.file = open(path, mode)
+ self._path = path
+ self._delete = delete
+ self._unlinked = False
+
+ def __getattr__(self, k):
+ return getattr(self.__dict__['file'], k)
+
+ def __iter__(self):
+ return self.__dict__['file']
+
+ def __enter__(self):
+ self.file.__enter__()
+ return self
+
+ def __exit__(self, exc, value, tb):
+ self.file.__exit__(exc, value, tb)
+ if self.__dict__['_delete']:
+ os.unlink(self.__dict__['_path'])
+ self._unlinked = True
+
+ def __del__(self):
+ if self.__dict__['_unlinked']:
+ return
+ self.file.__exit__(None, None, None)
+ if self.__dict__['_delete']:
+ os.unlink(self.__dict__['_path'])
+
+
+@contextmanager
+def TemporaryDirectory():
+ """
+ create a temporary directory using tempfile.mkdtemp, and then clean it up.
+
+ Example usage:
+ with TemporaryDirectory() as tmp:
+ open(os.path.join(tmp, "a_temp_file"), "w").write("data")
+
+ """
+ tempdir = tempfile.mkdtemp()
+ try:
+ yield tempdir
+ finally:
+ shutil.rmtree(tempdir)
+
+
+### utilities dealing with URLs
+
+def is_url(thing):
+ """
+ Return True if thing looks like a URL.
+ """
+
+ parsed = urlparse.urlparse(thing)
+ if 'scheme' in parsed:
+ return len(parsed.scheme) >= 2
+ else:
+ return len(parsed[0]) >= 2
+
+def load(resource):
+ """
+ open a file or URL for reading. If the passed resource string is not a URL,
+ or begins with 'file://', return a ``file``. Otherwise, return the
+ result of urllib2.urlopen()
+ """
+
+ # handle file URLs separately due to python stdlib limitations
+ if resource.startswith('file://'):
+ resource = resource[len('file://'):]
+
+ if not is_url(resource):
+ # if no scheme is given, it is a file path
+ return file(resource)
+
+ return urllib2.urlopen(resource)
+