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import os
import sys
import urllib
import platform
# annoyingly there does not seem to be a single standard way to check you are
# on windows
def getstatusoutput(cmd):
'''Wrap L{commands.getstatusoutput} so it works on Windows.'''
os = platform.system()
if os == 'Windows':
# from http://gizmodise.com/linux/?p=70
import os
pipe = os.popen('\"' + cmd + '\" 2>&1', 'r')
text = pipe.read()
sts = pipe.close()
if sts is None: sts = 0
if text[-1:] == '\n': text = text[:-1]
return sts, text
else:
import commands
return commands.getstatusoutput(cmd)
import posixpath
import zipfile
class Downloader(object):
'''Handling downloading (and unnpacking) of urls.
'''
def download(self, url, dest_dir, progress_bar=True, **kwargs):
'''Download a 'resource' at `url` to a destination directory `dest`.
@param dest_dir: destination directory to download to.
@return: path to downloaded file
TODO: support vcs backend (e.g. svn, hg etc)
'''
link = Link(url)
filename = link.filename
location = os.path.join(dest_dir, filename)
if not os.path.exists(dest_dir):
os.makedirs(dest_dir)
if progress_bar:
reporthook = self._dl_progress
else:
reporthook = None
self._download_count = -1
urllib.urlretrieve(url, location, reporthook=reporthook)
return location
def _dl_progress(self, count, block_size, total_size):
def format_size(bytes):
if bytes > 1000*1000:
return '%.1fMb' % (bytes/1000.0/1000)
elif bytes > 10*1000:
return '%iKb' % (bytes/1000)
elif bytes > 1000:
return '%.1fKb' % (bytes/1000.0)
else:
return '%ib' % bytes
if count == 0:
print('Total size: %s' % format_size(total_size))
last_percent = int((count-1)*block_size*100/total_size)
# may have downloaded less if count*block_size > total_size
maxdownloaded = count * block_size
percent = min(int(maxdownloaded*100/total_size), 100)
if percent > last_percent:
# TODO: is this acceptable? Do we want to do something nicer?
sys.stdout.write('%3d%% [%s>%s]\r' % (
percent,
percent/2 * '=',
(50 - percent/2) * ' '
))
sys.stdout.flush()
if maxdownloaded >= total_size:
print('\n')
def unpack_file(self, src, dest):
# if a zip, targz etc then unpack o/w leave it
if (filename.endswith('.zip')
or zipfile.is_zipfile(filename)):
self.unzip_file(filename, location, flatten=not filename.endswith('.pybundle'))
# from pip
def unzip_file(self, filename, location, flatten=True):
"""Unzip the file (zip file located at filename) to the destination
location"""
if not os.path.exists(location):
os.makedirs(location)
zipfp = open(filename, 'rb')
try:
zip = zipfile.ZipFile(zipfp)
leading = has_leading_dir(zip.namelist()) and flatten
for name in zip.namelist():
data = zip.read(name)
fn = name
if leading:
fn = split_leading_dir(name)[1]
fn = os.path.join(location, fn)
dir = os.path.dirname(fn)
if not os.path.exists(dir):
os.makedirs(dir)
if fn.endswith('/') or fn.endswith('\\'):
# A directory
if not os.path.exists(fn):
os.makedirs(fn)
else:
fp = open(fn, 'wb')
try:
fp.write(data)
finally:
fp.close()
finally:
zipfp.close()
# taken from pip v0.6.2
# MIT licensed
class Link(object):
def __init__(self, url):
self.url = url
def __str__(self):
return self.url
def __repr__(self):
return '<Link %s>' % self
def __eq__(self, other):
return self.url == other.url
def __hash__(self):
return hash(self.url)
@property
def filename(self):
url = self.url
url = url.split('#', 1)[0]
url = url.split('?', 1)[0]
url = url.rstrip('/')
name = posixpath.basename(url)
assert name, (
'URL %r produced no filename' % url)
return name
@property
def scheme(self):
return urlparse.urlsplit(self.url)[0]
@property
def path(self):
return urlparse.urlsplit(self.url)[2]
def splitext(self):
return splitext(posixpath.basename(self.path.rstrip('/')))
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