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pip-bundler.py
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#!/usr/bin/env python2
import pip
import pkg_resources
import sys, os, tarfile, zipfile, shutil, urllib2, getopt
from distutils.version import StrictVersion
from pip.util import splitext
from pip.exceptions import DistributionNotFound
from pip.index import PackageFinder
from pip.req import InstallRequirement
from pip.req import parse_requirements
#Check pip version before working
if StrictVersion(pip.__version__) < StrictVersion('1.4.1'):
print("ERROR: Pip version should be 1.4.1 or more. Current version"
" %s" % pip.__version__)
exit(1)
class Bundler:
def __init__(self, cache_directory, use_wheel=False):
self.cache_directory = cache_directory
self.finder = PackageFinder([], ["http://pypi.python.org/simple"], use_wheel=use_wheel)
def _is_cached(self, file_name):
return os.path.isfile(os.path.join(self.cache_directory, file_name))
def _fetch_package(self,package):
print(" -> downloading %s" % package.filename)
remote_file = urllib2.urlopen(package.url)
local_file = open(str(os.path.join(self.cache_directory, package.filename)), 'wb')
local_file.write(remote_file.read())
local_file.close()
def _extract_dependencies(self, file_name):
archive = None
names = None
dependencies = []
if file_name.find('.tar.gz') > 0 or file_name.find('.tar.bz2') > 0:
archive = tarfile.TarFile.open(os.path.join(self.cache_directory, file_name))
elif file_name.find('.zip') > 0:
archive = zipfile.ZipFile(os.path.join(self.cache_directory, file_name))
if type(archive) is zipfile.ZipFile:
names = archive.namelist()
elif type(archive) is tarfile.TarFile:
names = archive.getnames()
if names is not None:
package_requires = None
package_name = str(splitext(file_name)[0]).strip()
if os.path.join(package_name, "requirements.txt") in names:
archive.extract(os.path.join(package_name, "requirements.txt"), "tmp")
package_requires = os.path.join("tmp", package_name, "requirements.txt")
elif os.path.join(package_name, "tools/pip-requires") in names:
archive.extract(os.path.join(package_name, "tools/pip-requires"), "tmp")
package_requires = os.path.join("tmp", package_name, "tools/pip-requires")
if package_requires is not None:
install_reqs = parse_requirements(package_requires)
dependencies = [str(ir.req) for ir in install_reqs]
if os.path.isdir(os.path.join("tmp")):
shutil.rmtree(os.path.join("tmp"))
if archive is not None:
archive.close()
return dependencies
def resolve(self, requires, parent=None, update=False):
self.update = update
for require in requires:
try:
package = self.finder.find_requirement(InstallRequirement.from_line(require, None), False)
if not self._is_cached(package.filename):
if self.update:
self._fetch_package(package)
else:
print(" -> %s not cached but needed" % package.filename)
exit(1)
dependencies = self._extract_dependencies(package.filename)
self.resolve(dependencies, update=self.update, parent=package.filename)
except DistributionNotFound as error:
print(error)
exit(1)
class Dir2Pi:
def __init__(self, cache_directory):
self.cache_directory = cache_directory
def egg_to_package(self, file):
""" Extracts the package name from an egg.
egg_to_package("PyYAML-3.10-py2.7-macosx-10.7-x86_64.egg")
('PyYAML', '3.10-py2.7-macosx-10.7-x86_64.egg')
egg_to_package("python_ldap-2.3.9-py2.7-macosx-10.3-fat.egg")
('python-ldap', '2.3.9-py2.7-macosx-10.3-fat.egg')
"""
dist = pkg_resources.Distribution.from_location(None, file)
name = dist.project_name
return name, file[len(name)+1:]
def file_to_package(self, file, basedir=None):
""" Returns the package name for a given file.
file_to_package("foo-1.2.3_rc1.tar.gz")
('foo', '1.2.3-rc1.tar.gz')
file_to_package("foo-bar-1.2.tgz")
('foo-bar', '1.2.tgz')
"""
if os.path.splitext(file)[1].lower() == ".egg":
return self.egg_to_package(file)
split = file.rsplit("-", 1)
if len(split) != 2:
msg = "unexpected file name: %s " % file
msg += "(not in 'pkg-name-version.xxx' format"
if basedir:
msg += "; found in directory: %s" % basedir
msg += ")"
raise ValueError(msg)
return split[0], pkg_resources.safe_name(split[1])
def create_dir_simple(self):
"""
Creates the directory self.cache_directory/simple/ and populates
it with the directory structure required to use with
pip's --index-url.
Assumes that self.cache_directory contains a bunch of archives
named
'package-name-version.ext' (ex 'foo-2.1.tar.gz' or
'foo-bar-1.3rc1.bz2').
For example:
$ ls packages/
foo-1.2.tar.gz
$ dir2pi packages/
$ find packages/
packages/
packages/foo-1.2.tar.gz
packages/simple/
packages/simple/foo/
packages/simple/foo/foo-1.2.tar.gz
"""
pkgdir = self.cache_directory
if not os.path.isdir(pkgdir):
raise ValueError("no such directory: %r" % (pkgdir, ))
pkgdirpath = lambda *x: os.path.join(pkgdir, *x)
shutil.rmtree(pkgdirpath("simple"), ignore_errors=True)
os.mkdir(pkgdirpath("simple"))
for file in os.listdir(pkgdir):
pkg_filepath = os.path.join(pkgdir, file)
if not os.path.isfile(pkg_filepath):
continue
pkg_basename = os.path.basename(file)
if pkg_basename.startswith("."):
continue
pkg_name, pkg_rest = self.file_to_package(pkg_basename, pkgdir)
pkg_dir = pkgdirpath("simple", pkg_name)
if not os.path.exists(pkg_dir):
os.mkdir(pkg_dir)
pkg_new_basename = "-".join([pkg_name, pkg_rest])
symlink_target = os.path.join(pkg_dir, pkg_new_basename)
symlink_source = os.path.join("../../", pkg_basename)
os.symlink(symlink_source, symlink_target)
def print_help():
print 'pip-bundler.py <options> -c <cache directory> requires'
print '\t-f\tfetch packages if not cached'
def main(argv):
cache_directory = None
cache_update = False
try:
opts, args = getopt.getopt(argv,"hfc:",["cache="])
except getopt.GetoptError:
print_help()
exit(2)
for opt, arg in opts:
if opt == '-h':
print_help()
exit()
elif opt in ("-f"):
cache_update = True
elif opt in ("-c"):
cache_directory = arg
if cache_directory is None:
print("Cache directory not configured")
exit(1)
bundler = Bundler(str(cache_directory))
bundler.resolve(args, update=cache_update)
dir2pi = Dir2Pi(str(cache_directory))
dir2pi.create_dir_simple()
if __name__ == "__main__":
main(sys.argv[1:])