def fetch_dist(self,
dist,
fetch_dir,
force=False,
check_md5=False,
dry_run=False):
"""
Get a distribution, i.e. copy or download the distribution into
fetch_dir.
force:
force download or copy
check_md5:
when determining if a file needs to be downloaded or copied,
check it's MD5. This is, of course, slower but more reliable
then just checking the file-size (which always done first).
Note:
* This option has option has nothing to do with checking the
MD5 of a download. The md5 is always checked when files are
downloaded (regardless of this option).
* If force=True, this option is has no effect, because the file
is forcefully downloaded, ignoring any existing file (as well
as the MD5).
"""
md5 = self.index[dist].get('md5', None)
size = self.index[dist].get('size', None)
fn = dist_naming.filename_dist(dist)
dst = join(fetch_dir, fn)
# if force is not used, see if (i) the file exists (ii) its size is
# the expected (iii) optionally, make sure the md5 is the expected.
if (not force and isfile(dst) and getsize(dst) == size
and (not check_md5 or md5_file(dst) == md5)):
if self.verbose:
print "Not forcing refetch, %r already exists" % dst
return
pprint_fn_action(fn, ['copying',
'downloading'][dist.startswith('http://')])
if dry_run:
return
if self.verbose:
print "Copying: %r" % dist
print " to: %r" % dst
fo = open(dst + '.part', 'wb')
write_data_from_url(fo, dist, md5, size)
fo.close()
rm_rf(dst)
os.rename(dst + '.part', dst)
def fetch_dist(self, dist, fetch_dir, force=False, check_md5=False,
dry_run=False):
"""
Get a distribution, i.e. copy or download the distribution into
fetch_dir.
force:
force download or copy
check_md5:
when determining if a file needs to be downloaded or copied,
check it's MD5. This is, of course, slower but more reliable
then just checking the file-size (which is always done first).
Note:
* This option has nothing to do with checking the MD5 of the
download. The md5 is always checked when files are
downloaded (regardless of this option).
* If force=True, this option is has no effect, because the file
is forcefully downloaded, ignoring any existing file (as well
as the MD5).
"""
md5 = self.index[dist].get('md5')
size = self.index[dist].get('size')
fn = dist_naming.filename_dist(dist)
dst = join(fetch_dir, fn)
# if force is not used, see if (i) the file exists (ii) its size is
# the expected (iii) optionally, make sure the md5 is the expected.
if (not force and isfile(dst) and getsize(dst) == size and
(not check_md5 or md5_file(dst) == md5)):
if self.verbose:
print "Not forcing refetch, %r already exists" % dst
return
self.file_action_callback(fn, ('copying', 'downloading')
[dist.startswith(('http://', 'https://'))])
if dry_run:
return
if self.verbose:
print "Copying: %r" % dist
print " to: %r" % dst
fo = open(dst + '.part', 'wb')
write_data_from_url(fo, dist, md5, size,
progress_callback=self.download_progress_callback)
fo.close()
rm_rf(dst)
os.rename(dst + '.part', dst)
def determine_install_order(self, dists):
"""
given the distributions 'dists' (which are already complete, i.e.
the for each distribution all dependencies are also included in
the 'dists'), return a list of the same distribution in the correct
install order
"""
dists = list(dists)
assert self.are_complete(dists)
# make sure each project name is listed only once
assert len(dists) == len(set(self.cname_dist(d) for d in dists))
# the distributions corresponding to the requirements must be sorted
# because the output of this function is otherwise not deterministic
dists.sort(key=self.cname_dist)
# maps dist -> set of required (project) names
rns = {}
for dist in dists:
rns[dist] = set(r.name for r in self.reqs_dist(dist))
# as long as we have things missing, simply look for things which
# can be added, i.e. all the requirements have been added already
result = []
names_inst = set()
while len(result) < len(dists):
n = len(result)
for dist in dists:
if dist in result:
continue
# see if all required packages were added already
if all(bool(name in names_inst) for name in rns[dist]):
result.append(dist)
names_inst.add(self.index[dist]['cname'])
assert len(names_inst) == len(result)
if len(result) == n:
# nothing was added
raise Exception("Loop in dependency graph\n%r" %
[dist_naming.filename_dist(d) for d in dists])
return result
def determine_install_order(self, dists):
"""
given the distributions 'dists' (which are already complete, i.e.
the for each distribution all dependencies are also included in
the 'dists'), return a list of the same distribution in the correct
install order
"""
dists = list(dists)
assert self.are_complete(dists)
# make sure each project name is listed only once
assert len(dists) == len(set(self.cname_dist(d) for d in dists))
# the distributions corresponding to the requirements must be sorted
# because the output of this function is otherwise not deterministic
dists.sort(key=self.cname_dist)
# maps dist -> set of required (project) names
rns = {}
for dist in dists:
rns[dist] = set(r.name for r in self.reqs_dist(dist))
# as long as we have things missing, simply look for things which
# can be added, i.e. all the requirements have been added already
result = []
names_inst = set()
while len(result) < len(dists):
n = len(result)
for dist in dists:
if dist in result:
continue
# see if all required packages were added already
if all(bool(name in names_inst) for name in rns[dist]):
result.append(dist)
names_inst.add(self.index[dist]['cname'])
assert len(names_inst) == len(result)
if len(result) == n:
# nothing was added
raise Exception("Loop in dependency graph\n%r" %
[dist_naming.filename_dist(d) for d in dists])
return result
def dist_as_req(dist, strictness=3):
"""
Return the distribution in terms of the a requirement object.
That is: What requirement gives me the distribution?
"""
return filename_as_req(filename_dist(dist), strictness)
def dist_as_req(dist, strictness=3):
"""
Return the distribution in terms of the a requirement object.
That is: What requirement gives me the distribution?
"""
return filename_as_req(filename_dist(dist), strictness)
