/usr/share/pyshared/paste/script/entrypoints.py is in python-pastescript 1.7.5-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
import textwrap
import os
import pkg_resources
from command import Command, BadCommand
import fnmatch
import re
import traceback
from cStringIO import StringIO
import inspect
import types
class EntryPointCommand(Command):
usage = "ENTRY_POINT"
summary = "Show information about entry points"
description = """\
Shows information about one or many entry points (you can use
wildcards for entry point names). Entry points are used for Egg
plugins, and are named resources -- like an application, template
plugin, or other resource. Entry points have a [group] which
defines what kind of object they describe, and inside groups each
entry point is named.
"""
max_args = 2
parser = Command.standard_parser(verbose=False)
parser.add_option('--list', '-l',
dest='list_entry_points',
action='store_true',
help='List all the kinds of entry points on the system')
parser.add_option('--egg', '-e',
dest='show_egg',
help="Show all the entry points for the given Egg")
parser.add_option('--regex',
dest='use_regex',
action='store_true',
help="Make pattern match as regular expression, not just a wildcard pattern")
def command(self):
if self.options.list_entry_points:
return self.list_entry_points()
if self.options.show_egg:
return self.show_egg(self.options.show_egg)
if not self.args:
raise BadCommand("You must give an entry point (or --list)")
pattern = self.get_pattern(self.args[0])
groups = self.get_groups_by_pattern(pattern)
if not groups:
raise BadCommand('No group matched %s' % self.args[0])
ep_pat = None
if len(self.args) > 1:
ep_pat = self.get_pattern(self.args[1])
for group in groups:
desc = self.get_group_description(group)
print '[%s]' % group
if desc:
print self.wrap(desc)
print
by_dist = {}
self.print_entry_points_by_group(group, ep_pat)
def print_entry_points_by_group(self, group, ep_pat):
env = pkg_resources.Environment()
project_names = list(env)
project_names.sort()
for project_name in project_names:
dists = list(env[project_name])
assert dists
dist = dists[0]
entries = dist.get_entry_map(group).values()
if ep_pat:
entries = [e for e in entries
if ep_pat.search(e.name)]
if not entries:
continue
if len(dists) > 1:
print '%s (+ %i older versions)' % (
dist, len(dists)-1)
else:
print '%s' % dist
entries.sort(lambda a, b: cmp(a.name, b.name))
for entry in entries:
print self._ep_description(entry)
desc = self.get_entry_point_description(entry, group)
if desc and desc.description:
print self.wrap(desc.description, indent=4)
def show_egg(self, egg_name):
group_pat = None
if self.args:
group_pat = self.get_pattern(self.args[0])
ep_pat = None
if len(self.args) > 1:
ep_pat = self.get_pattern(self.args[1])
if egg_name.startswith('egg:'):
egg_name = egg_name[4:]
dist = pkg_resources.get_distribution(egg_name)
entry_map = dist.get_entry_map()
entry_groups = entry_map.items()
entry_groups.sort()
for group, points in entry_groups:
if group_pat and not group_pat.search(group):
continue
print '[%s]' % group
points = points.items()
points.sort()
for name, entry in points:
if ep_pat:
if not ep_pat.search(name):
continue
print self._ep_description(entry)
desc = self.get_entry_point_description(entry, group)
if desc and desc.description:
print self.wrap(desc.description, indent=2)
print
def wrap(self, text, indent=0):
text = dedent(text)
width = int(os.environ.get('COLUMNS', 70)) - indent
text = '\n'.join([line.rstrip() for line in text.splitlines()])
paras = text.split('\n\n')
new_paras = []
for para in paras:
if para.lstrip() == para:
# leading whitespace means don't rewrap
para = '\n'.join(textwrap.wrap(para, width))
new_paras.append(para)
text = '\n\n'.join(new_paras)
lines = [' '*indent + line
for line in text.splitlines()]
return '\n'.join(lines)
def _ep_description(self, ep, pad_name=None):
name = ep.name
if pad_name is not None:
name = name + ' '*(pad_name-len(name))
dest = ep.module_name
if ep.attrs:
dest = dest + ':' + '.'.join(ep.attrs)
return '%s = %s' % (name, dest)
def get_pattern(self, s):
if not s:
return None
if self.options.use_regex:
return re.compile(s)
else:
return re.compile(fnmatch.translate(s), re.I)
def list_entry_points(self):
pattern = self.get_pattern(self.args and self.args[0])
groups = self.get_groups_by_pattern(pattern)
print '%i entry point groups found:' % len(groups)
for group in groups:
desc = self.get_group_description(group)
print '[%s]' % group
if desc:
if hasattr(desc, 'description'):
desc = desc.description
print self.wrap(desc, indent=2)
def get_groups_by_pattern(self, pattern):
env = pkg_resources.Environment()
eps = {}
for project_name in env:
for dist in env[project_name]:
for name in pkg_resources.get_entry_map(dist):
if pattern and not pattern.search(name):
continue
if (not pattern
and name.startswith('paste.description.')):
continue
eps[name] = None
eps = eps.keys()
eps.sort()
return eps
def get_group_description(self, group):
for entry in pkg_resources.iter_entry_points('paste.entry_point_description'):
if entry.name == group:
ep = entry.load()
if hasattr(ep, 'description'):
return ep.description
else:
return ep
return None
def get_entry_point_description(self, ep, group):
try:
return self._safe_get_entry_point_description(ep, group)
except Exception, e:
out = StringIO()
traceback.print_exc(file=out)
return ErrorDescription(e, out.getvalue())
def _safe_get_entry_point_description(self, ep, group):
ep.dist.activate()
meta_group = 'paste.description.'+group
meta = ep.dist.get_entry_info(meta_group, ep.name)
if not meta:
generic = list(pkg_resources.iter_entry_points(
meta_group, 'generic'))
if not generic:
return super_generic(ep.load())
# @@: Error if len(generic) > 1?
obj = generic[0].load()
desc = obj(ep, group)
else:
desc = meta.load()
return desc
class EntryPointDescription(object):
def __init__(self, group):
self.group = group
# Should define:
# * description
class SuperGeneric(object):
def __init__(self, doc_object):
self.doc_object = doc_object
self.description = dedent(self.doc_object.__doc__)
try:
if isinstance(self.doc_object, (type, types.ClassType)):
func = self.doc_object.__init__.im_func
elif (hasattr(self.doc_object, '__call__')
and not isinstance(self.doc_object, types.FunctionType)):
func = self.doc_object.__call__
else:
func = self.doc_object
if hasattr(func, '__paste_sig__'):
sig = func.__paste_sig__
else:
sig = inspect.getargspec(func)
sig = inspect.formatargspec(*sig)
except TypeError:
sig = None
if sig:
if self.description:
self.description = '%s\n\n%s' % (
sig, self.description)
else:
self.description = sig
def dedent(s):
if s is None:
return s
s = s.strip('\n').strip('\r')
return textwrap.dedent(s)
def super_generic(obj):
desc = SuperGeneric(obj)
if not desc.description:
return None
return desc
class ErrorDescription(object):
def __init__(self, exc, tb):
self.exc = exc
self.tb = '\n'.join(tb)
self.description = 'Error loading: %s' % exc
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