Commit 2658deb8 authored by tlotze's avatar tlotze

merged the tlotze-download-api branch

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@102051 62d5b8a3-27da-0310-9561-8e5933582275
parent 9d877727
Change History
**************
1.4.0 (unreleased)
==================
- Added annotate command for annotated sections. Displays sections key-value pairs
along with the value origin.
- Added a download API that handles the download cache, offline mode etc and
is meant to be reused by recipes.
- Used the download API to allow caching of base configurations (specified by
the buildout section's 'extends' option).
1.3.0 (2009-06-22)
==================
......
##############################################################################
#
# Copyright (c) 2006 Zope Corporation and Contributors.
# Copyright (c) 2006-2009 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
......@@ -12,7 +12,7 @@
#
##############################################################################
version = "1.3.1dev"
version = "1.4.0dev"
import os
from setuptools import setup, find_packages
......@@ -32,8 +32,12 @@ long_description=(
+ '\n' +
read('src', 'zc', 'buildout', 'repeatable.txt')
+ '\n' +
read('src', 'zc', 'buildout', 'download.txt')
+ '\n' +
read('src', 'zc', 'buildout', 'downloadcache.txt')
+ '\n' +
read('src', 'zc', 'buildout', 'extends-cache.txt')
+ '\n' +
read('src', 'zc', 'buildout', 'setup.txt')
+ '\n' +
read('src', 'zc', 'buildout', 'update.txt')
......
##############################################################################
#
# Copyright (c) 2005 Zope Corporation and Contributors.
# Copyright (c) 2005-2009 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
......@@ -25,7 +25,6 @@ import shutil
import cStringIO
import sys
import tempfile
import urllib2
import ConfigParser
import UserDict
import glob
......@@ -34,6 +33,7 @@ import copy
import pkg_resources
import zc.buildout
import zc.buildout.download
import zc.buildout.easy_install
from rmtree import rmtree
......@@ -156,17 +156,22 @@ class Buildout(UserDict.DictMixin):
else:
base = None
override = dict((option, (value, 'COMMAND_LINE_VALUE'))
for section, option, value in cloptions
if section == 'buildout')
# load user defaults, which override defaults
if user_defaults:
user_config = os.path.join(os.path.expanduser('~'),
'.buildout', 'default.cfg')
if os.path.exists(user_config):
_update(data, _open(os.path.dirname(user_config), user_config,
[]))
[], data['buildout'].copy(), override))
# load configuration files
if config_file:
_update(data, _open(os.path.dirname(config_file), config_file, []))
_update(data, _open(os.path.dirname(config_file), config_file, [],
data['buildout'].copy(), override))
# apply command-line options
for (section, option, value) in cloptions:
......@@ -174,7 +179,6 @@ class Buildout(UserDict.DictMixin):
if options is None:
options = data[section] = {}
options[option] = value, "COMMAND_LINE_VALUE"
# The egg dire
self._annotated = copy.deepcopy(data)
self._raw = _unannotate(data)
......@@ -313,6 +317,11 @@ class Buildout(UserDict.DictMixin):
for name in _buildout_default_options:
options[name]
# Do the same for extends-cache which is not among the defaults but
# wasn't recognized as having been used since it was used before
# tracking was turned on.
options.get('extends-cache')
os.chdir(options['directory'])
def _buildout_path(self, name):
......@@ -1214,14 +1223,18 @@ def _save_options(section, options, f):
for option, value in items:
_save_option(option, value, f)
def _open(base, filename, seen):
def _open(base, filename, seen, dl_options, override):
"""Open a configuration file and return the result as a dictionary,
Recursively open other files based on buildout options found.
"""
_update_section(dl_options, override)
_dl_options = _unannotate_section(dl_options.copy())
download = zc.buildout.download.Download(
_dl_options, cache=_dl_options.get('extends-cache'), fallback=True,
hash_name=True)
if _isurl(filename):
fp = urllib2.urlopen(filename)
fp = open(download(filename))
base = filename[:filename.rfind('/')]
elif _isurl(base):
if os.path.isabs(filename):
......@@ -1229,7 +1242,7 @@ def _open(base, filename, seen):
base = os.path.dirname(filename)
else:
filename = base + '/' + filename
fp = urllib2.urlopen(filename)
fp = open(download(filename))
base = filename[:filename.rfind('/')]
else:
filename = os.path.join(base, filename)
......@@ -1239,6 +1252,7 @@ def _open(base, filename, seen):
if filename in seen:
raise zc.buildout.UserError("Recursive file include", seen, filename)
root_config_file = not seen
seen.append(filename)
result = {}
......@@ -1256,18 +1270,23 @@ def _open(base, filename, seen):
result = _annotate(result, filename)
if root_config_file and 'buildout' in result:
dl_options = _update_section(dl_options, result['buildout'])
if extends:
extends = extends.split()
extends.reverse()
for fname in extends:
result = _update(_open(base, fname, seen), result)
result = _update(_open(base, fname, seen, dl_options, override),
result)
if extended_by:
self._logger.warn(
"The extendedBy option is deprecated. Stop using it."
)
for fname in extended_by.split():
result = _update(result, _open(base, fname, seen))
result = _update(result,
_open(base, fname, seen, dl_options, override))
seen.pop()
return result
......
##############################################################################
#
# Copyright (c) 2009 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Buildout download infrastructure"""
try:
from hashlib import md5
except ImportError:
from md5 import new as md5
from zc.buildout.easy_install import realpath
import atexit
import logging
import os
import os.path
import shutil
import tempfile
import urllib
import urlparse
import zc.buildout
class URLOpener(urllib.FancyURLopener):
http_error_default = urllib.URLopener.http_error_default
class ChecksumError(zc.buildout.UserError):
pass
url_opener = URLOpener()
class Download(object):
"""Configurable download utility.
Handles the download cache and offline mode.
Download(options=None, cache=None, namespace=None, hash_name=False)
options: mapping of buildout options (e.g. a ``buildout`` config section)
cache: path to the download cache (excluding namespaces)
namespace: namespace directory to use inside the cache
hash_name: whether to use a hash of the URL as cache file name
logger: an optional logger to receive download-related log messages
"""
def __init__(self, options={}, cache=-1, namespace=None,
offline=-1, fallback=False, hash_name=False, logger=None):
self.cache = cache
if cache == -1:
self.cache = options.get('download-cache')
self.namespace = namespace
self.offline = offline
if offline == -1:
self.offline = (options.get('offline') == 'true'
or options.get('install-from-cache') == 'true')
self.fallback = fallback
self.hash_name = hash_name
self.logger = logger or logging.getLogger('zc.buildout')
@property
def cache_dir(self):
if self.cache is not None:
return os.path.join(realpath(self.cache), self.namespace or '')
def __call__(self, url, md5sum=None, path=None):
"""Download a file according to the utility's configuration.
url: URL to download
md5sum: MD5 checksum to match
path: where to place the downloaded file
Returns the path to the downloaded file.
"""
if self.cache:
local_path = self.download_cached(url, md5sum)
else:
local_path = self.download(url, md5sum, path)
return locate_at(local_path, path)
def download_cached(self, url, md5sum=None):
"""Download a file from a URL using the cache.
This method assumes that the cache has been configured. Optionally, it
raises a ChecksumError if a cached copy of a file has an MD5 mismatch,
but will not remove the copy in that case.
"""
cache_dir = self.cache_dir
if not os.path.exists(cache_dir):
os.makedirs(cache_dir)
cache_key = self.filename(url)
cached_path = os.path.join(cache_dir, cache_key)
self.logger.debug('Searching cache at %s' % cache_dir)
if os.path.isfile(cached_path):
if self.fallback:
try:
self.download(url, md5sum, cached_path)
except ChecksumError:
raise
except Exception:
pass
if not check_md5sum(cached_path, md5sum):
raise ChecksumError(
'MD5 checksum mismatch for cached download '
'from %r at %r' % (url, cached_path))
self.logger.debug('Using cache file %s' % cached_path)
else:
self.logger.debug('Cache miss; will cache %s as %s' %
(url, cached_path))
self.download(url, md5sum, cached_path)
return cached_path
def download(self, url, md5sum=None, path=None):
"""Download a file from a URL to a given or temporary path.
An online resource is always downloaded to a temporary file and moved
to the specified path only after the download is complete and the
checksum (if given) matches. If path is None, the temporary file is
returned and scheduled for deletion at process exit.
"""
parsed_url = urlparse.urlparse(url, 'file')
if parsed_url.scheme == 'file':
self.logger.debug('Using local resource %s' % url)
if not check_md5sum(parsed_url.path, md5sum):
raise ChecksumError(
'MD5 checksum mismatch for local resource at %r.' %
parsed_url.path)
return locate_at(parsed_url.path, path)
if self.offline:
raise zc.buildout.UserError(
"Couldn't download %r in offline mode." % url)
self.logger.info('Downloading %s' % url)
urllib._urlopener = url_opener
handle, tmp_path = tempfile.mkstemp(prefix='buildout-')
tmp_path, headers = urllib.urlretrieve(url, tmp_path)
if not check_md5sum(tmp_path, md5sum):
os.remove(tmp_path)
raise ChecksumError(
'MD5 checksum mismatch downloading %r' % url)
if path:
shutil.move(tmp_path, path)
return path
else:
atexit.register(remove, tmp_path)
return tmp_path
def filename(self, url):
"""Determine a file name from a URL according to the configuration.
"""
if self.hash_name:
return md5(url).hexdigest()
else:
parsed = urlparse.urlparse(url)
for name in reversed(parsed.path.split('/')):
if name:
return name
else:
return '%s:%s' % (parsed.host, parsed.port)
def check_md5sum(path, md5sum):
"""Tell whether the MD5 checksum of the file at path matches.
No checksum being given is considered a match.
"""
if md5sum is None:
return True
f = open(path)
checksum = md5()
try:
chunk = f.read(2**16)
while chunk:
checksum.update(chunk)
chunk = f.read(2**16)
return checksum.hexdigest() == md5sum
finally:
f.close()
def remove(path):
if os.path.exists(path):
os.remove(path)
def locate_at(source, dest):
if dest is None or realpath(dest) == realpath(source):
return source
try:
os.link(source, dest)
except (AttributeError, OSError):
shutil.copyfile(source, dest)
return dest
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#############################################################################
#
# Copyright (c) 2004 Zope Corporation and Contributors.
# Copyright (c) 2004-2009 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
......@@ -197,7 +197,7 @@ def wait_until(label, func, *args, **kw):
while time.time() < deadline:
if func(*args, **kw):
return
time.sleep('.01')
time.sleep(0.01)
raise ValueError('Timed out waiting for: '+label)
def buildoutSetUp(test):
......
##############################################################################
#
# Copyright (c) 2004 Zope Corporation and Contributors.
# Copyright (c) 2004-2009 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
......@@ -2811,6 +2811,21 @@ def test_suite():
(re.compile(r'\\[\\]?'), '/'),
]),
),
doctest.DocFileSuite(
'download.txt', 'extends-cache.txt',
setUp=easy_install_SetUp,
tearDown=zc.buildout.testing.buildoutTearDown,
optionflags=doctest.NORMALIZE_WHITESPACE | doctest.ELLIPSIS,
checker=renormalizing.RENormalizing([
(re.compile('0x[0-9a-f]+'), '<MEM ADDRESS>'),
(re.compile('http://localhost:[0-9]{4,5}/'),
'http://localhost/'),
(re.compile('[0-9a-f]{32}'), '<MD5 CHECKSUM>'),
zc.buildout.testing.normalize_path,
]),
),
doctest.DocTestSuite(
setUp=easy_install_SetUp,
tearDown=zc.buildout.testing.buildoutTearDown,
......
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