2 Decentralized storage grid.
4 community web site: U{https://tahoe-lafs.org/}
7 class PackagingError(EnvironmentError):
9 Raised when there is an error in packaging of Tahoe-LAFS or its
10 dependencies which makes it impossible to proceed safely.
14 __version__ = "unknown"
16 from allmydata._version import __version__
18 # We're running in a tree that hasn't run update_version, and didn't
19 # come with a _version.py, so we don't know what our version is.
20 # This should not happen very often.
23 full_version = "unknown"
26 from allmydata._version import full_version, branch
28 # We're running in a tree that hasn't run update_version, and didn't
29 # come with a _version.py, so we don't know what our full version or
30 # branch is. This should not happen very often.
33 __appname__ = "unknown"
35 from allmydata._appname import __appname__
37 # We're running in a tree that hasn't run "./setup.py". This shouldn't happen.
40 # __full_version__ is the one that you ought to use when identifying yourself in the
41 # "application" part of the Tahoe versioning scheme:
42 # https://tahoe-lafs.org/trac/tahoe-lafs/wiki/Versioning
43 __full_version__ = __appname__ + '/' + str(__version__)
45 import os, platform, re, subprocess, sys, traceback
46 _distributor_id_cmdline_re = re.compile("(?:Distributor ID:)\s*(.*)", re.I)
47 _release_cmdline_re = re.compile("(?:Release:)\s*(.*)", re.I)
49 _distributor_id_file_re = re.compile("(?:DISTRIB_ID\s*=)\s*(.*)", re.I)
50 _release_file_re = re.compile("(?:DISTRIB_RELEASE\s*=)\s*(.*)", re.I)
52 global _distname,_version
56 def get_linux_distro():
57 """ Tries to determine the name of the Linux OS distribution name.
59 First, try to parse a file named "/etc/lsb-release". If it exists, and
60 contains the "DISTRIB_ID=" line and the "DISTRIB_RELEASE=" line, then return
61 the strings parsed from that file.
63 If that doesn't work, then invoke platform.dist().
65 If that doesn't work, then try to execute "lsb_release", as standardized in
68 http://refspecs.freestandards.org/LSB_1.0.0/gLSB/lsbrelease.html
70 The current version of the standard is here:
72 http://refspecs.freestandards.org/LSB_3.2.0/LSB-Core-generic/LSB-Core-generic/lsbrelease.html
74 that lsb_release emitted, as strings.
76 Returns a tuple (distname,version). Distname is what LSB calls a
77 "distributor id", e.g. "Ubuntu". Version is what LSB calls a "release",
80 A version of this has been submitted to python as a patch for the standard
81 library module "platform":
83 http://bugs.python.org/issue3937
85 global _distname,_version
86 if _distname and _version:
87 return (_distname, _version)
90 etclsbrel = open("/etc/lsb-release", "rU")
91 for line in etclsbrel:
92 m = _distributor_id_file_re.search(line)
94 _distname = m.group(1).strip()
95 if _distname and _version:
96 return (_distname, _version)
97 m = _release_file_re.search(line)
99 _version = m.group(1).strip()
100 if _distname and _version:
101 return (_distname, _version)
102 except EnvironmentError:
105 (_distname, _version) = platform.dist()[:2]
106 if _distname and _version:
107 return (_distname, _version)
110 p = subprocess.Popen(["lsb_release", "--all"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
113 for line in p.stdout.readlines():
114 m = _distributor_id_cmdline_re.search(line)
116 _distname = m.group(1).strip()
117 if _distname and _version:
118 return (_distname, _version)
120 m = _release_cmdline_re.search(p.stdout.read())
122 _version = m.group(1).strip()
123 if _distname and _version:
124 return (_distname, _version)
125 except EnvironmentError:
128 if os.path.exists("/etc/arch-release"):
129 return ("Arch_Linux", "")
131 return (_distname,_version)
134 # Our version of platform.platform(), telling us both less and more than the
135 # Python Standard Library's version does.
136 # We omit details such as the Linux kernel version number, but we add a
137 # more detailed and correct rendition of the Linux distribution and
138 # distribution-version.
139 if "linux" in platform.system().lower():
140 return platform.system()+"-"+"_".join(get_linux_distro())+"-"+platform.machine()+"-"+"_".join([x for x in platform.architecture() if x])
142 return platform.platform()
145 from allmydata.util import verlib
146 def normalized_version(verstr, what=None):
148 return verlib.NormalizedVersion(verlib.suggest_normalized_version(verstr))
149 except (StandardError, verlib.IrrationalVersionError):
150 cls, value, trace = sys.exc_info()
151 raise PackagingError, ("could not parse %s due to %s: %s"
152 % (what or repr(verstr), cls.__name__, value)), trace
155 def get_package_versions_and_locations():
157 from _auto_deps import package_imports, global_deprecation_messages, deprecation_messages, \
158 runtime_warning_messages, warning_imports
160 def package_dir(srcfile):
161 return os.path.dirname(os.path.dirname(os.path.normcase(os.path.realpath(srcfile))))
163 # pkg_resources.require returns the distribution that pkg_resources attempted to put
164 # on sys.path, which can differ from the one that we actually import due to #1258,
165 # or any other bug that causes sys.path to be set up incorrectly. Therefore we
166 # must import the packages in order to check their versions and paths.
168 # This is to suppress all UserWarnings and various DeprecationWarnings and RuntimeWarnings
169 # (listed in _auto_deps.py).
171 warnings.filterwarnings("ignore", category=UserWarning, append=True)
173 for msg in global_deprecation_messages + deprecation_messages:
174 warnings.filterwarnings("ignore", category=DeprecationWarning, message=msg, append=True)
175 for msg in runtime_warning_messages:
176 warnings.filterwarnings("ignore", category=RuntimeWarning, message=msg, append=True)
178 for modulename in warning_imports:
180 __import__(modulename)
184 # Leave suppressions for UserWarnings and global_deprecation_messages active.
185 for ign in runtime_warning_messages + deprecation_messages:
186 warnings.filters.pop()
190 def get_version(module, attr):
191 return str(getattr(module, attr, 'unknown'))
193 for pkgname, modulename in [(__appname__, 'allmydata')] + package_imports:
196 __import__(modulename)
197 module = sys.modules[modulename]
199 etype, emsg, etrace = sys.exc_info()
200 trace_info = (etype, str(emsg), ([None] + traceback.extract_tb(etrace))[-1])
201 packages.append( (pkgname, (None, None, trace_info)) )
204 if pkgname == __appname__:
205 comment = "%s: %s" % (branch, full_version)
206 elif pkgname == 'setuptools' and hasattr(module, '_distribute'):
207 # distribute does not report its version in any module variables
208 comment = 'distribute'
209 packages.append( (pkgname, (get_version(module, '__version__'), package_dir(module.__file__), comment)) )
210 elif pkgname == 'python':
211 packages.append( (pkgname, (platform.python_version(), sys.executable, None)) )
212 elif pkgname == 'platform':
213 packages.append( (pkgname, (get_platform(), None, None)) )
218 def check_requirement(req, vers_and_locs):
219 # TODO: check [] options
220 # We support only disjunctions of <=, >=, and ==
222 reqlist = req.split(',')
223 name = reqlist[0].split('<=')[0].split('>=')[0].split('==')[0].strip(' ').split('[')[0]
224 if name not in vers_and_locs:
225 raise PackagingError("no version info for %s" % (name,))
226 if req.strip(' ') == name:
228 (actual, location, comment) = vers_and_locs[name]
230 # comment is (type, message, (filename, line number, function name, text)) for the original ImportError
231 raise ImportError("for requirement %r: %s" % (req, comment))
232 if actual == 'unknown':
234 actualver = normalized_version(actual, what="actual version %r of %s from %r" % (actual, name, location))
239 required = s[1].strip(' ')
240 if actualver <= normalized_version(required, what="required maximum version %r in %r" % (required, req)):
241 return # maximum requirement met
245 required = s[1].strip(' ')
246 if actualver >= normalized_version(required, what="required minimum version %r in %r" % (required, req)):
247 return # minimum requirement met
251 required = s[1].strip(' ')
252 if actualver == normalized_version(required, what="required exact version %r in %r" % (required, req)):
253 return # exact requirement met
255 raise PackagingError("no version info or could not understand requirement %r" % (req,))
257 msg = ("We require %s, but could only find version %s.\n" % (req, actual))
258 if location and location != 'unknown':
259 msg += "The version we found is from %r.\n" % (location,)
260 msg += ("To resolve this problem, uninstall that version, either using your\n"
261 "operating system's package manager or by moving aside the directory.")
262 raise PackagingError(msg)
265 _vers_and_locs_list = get_package_versions_and_locations()
268 def cross_check_pkg_resources_versus_import():
269 """This function returns a list of errors due to any failed cross-checks."""
272 from _auto_deps import install_requires
274 pkg_resources_vers_and_locs = dict([(p.project_name.lower(), (str(p.version), p.location))
275 for p in pkg_resources.require(install_requires)])
277 return cross_check(pkg_resources_vers_and_locs, _vers_and_locs_list)
280 def cross_check(pkg_resources_vers_and_locs, imported_vers_and_locs_list):
281 """This function returns a list of errors due to any failed cross-checks."""
284 not_pkg_resourceable = set(['python', 'platform', __appname__.lower()])
285 not_import_versionable = set(['zope.interface', 'mock', 'pyasn1'])
286 ignorable = set(['argparse', 'pyutil', 'zbase32', 'distribute', 'twisted-web', 'twisted-core', 'twisted-conch'])
288 for name, (imp_ver, imp_loc, imp_comment) in imported_vers_and_locs_list:
290 if name not in not_pkg_resourceable:
291 if name not in pkg_resources_vers_and_locs:
292 if name == "setuptools" and "distribute" in pkg_resources_vers_and_locs:
293 pr_ver, pr_loc = pkg_resources_vers_and_locs["distribute"]
294 if not (os.path.normpath(os.path.realpath(pr_loc)) == os.path.normpath(os.path.realpath(imp_loc))
295 and imp_comment == "distribute"):
296 errors.append("Warning: dependency 'setuptools' found to be version %r of 'distribute' from %r "
297 "by pkg_resources, but 'import setuptools' gave version %r [%s] from %r. "
298 "A version mismatch is expected, but a location mismatch is not."
299 % (pr_ver, pr_loc, imp_ver, imp_comment or 'probably *not* distribute', imp_loc))
301 errors.append("Warning: dependency %r (version %r imported from %r) was not found by pkg_resources."
302 % (name, imp_ver, imp_loc))
305 pr_ver, pr_loc = pkg_resources_vers_and_locs[name]
306 if imp_ver is None and imp_loc is None:
307 errors.append("Warning: dependency %r could not be imported. pkg_resources thought it should be possible "
308 "to import version %r from %r.\nThe exception trace was %r."
309 % (name, pr_ver, pr_loc, imp_comment))
313 pr_normver = normalized_version(pr_ver)
315 errors.append("Warning: version number %r found for dependency %r by pkg_resources could not be parsed. "
316 "The version found by import was %r from %r. "
317 "pkg_resources thought it should be found at %r. "
318 "The exception was %s: %s"
319 % (pr_ver, name, imp_ver, imp_loc, pr_loc, e.__class__.__name__, e))
321 if imp_ver == 'unknown':
322 if name not in not_import_versionable:
323 errors.append("Warning: unexpectedly could not find a version number for dependency %r imported from %r. "
324 "pkg_resources thought it should be version %r at %r."
325 % (name, imp_loc, pr_ver, pr_loc))
328 imp_normver = normalized_version(imp_ver)
330 errors.append("Warning: version number %r found for dependency %r (imported from %r) could not be parsed. "
331 "pkg_resources thought it should be version %r at %r. "
332 "The exception was %s: %s"
333 % (imp_ver, name, imp_loc, pr_ver, pr_loc, e.__class__.__name__, e))
335 if pr_ver == 'unknown' or (pr_normver != imp_normver):
336 if not os.path.normpath(os.path.realpath(pr_loc)) == os.path.normpath(os.path.realpath(imp_loc)):
337 errors.append("Warning: dependency %r found to have version number %r (normalized to %r, from %r) "
338 "by pkg_resources, but version %r (normalized to %r, from %r) by import."
339 % (name, pr_ver, str(pr_normver), pr_loc, imp_ver, str(imp_normver), imp_loc))
341 imported_packages = set([p.lower() for (p, _) in imported_vers_and_locs_list])
342 for pr_name, (pr_ver, pr_loc) in pkg_resources_vers_and_locs.iteritems():
343 if pr_name not in imported_packages and pr_name not in ignorable:
344 errors.append("Warning: dependency %r (version %r) found by pkg_resources not found by import."
350 def get_error_string(errors, debug=False):
351 from allmydata._auto_deps import install_requires
353 msg = "\n%s\n" % ("\n".join(errors),)
356 "For debugging purposes, the PYTHONPATH was\n"
358 "install_requires was\n"
360 "sys.path after importing pkg_resources was\n"
362 % (os.environ.get('PYTHONPATH'), install_requires, (os.pathsep+"\n ").join(sys.path)) )
365 def check_all_requirements():
366 """This function returns a list of errors due to any failed checks."""
368 from allmydata._auto_deps import install_requires
372 # We require at least 2.6 on all platforms.
373 # (On Python 3, we'll have failed long before this point.)
374 if sys.version_info < (2, 6):
376 version_string = ".".join(map(str, sys.version_info))
378 version_string = repr(sys.version_info)
379 errors.append("Tahoe-LAFS currently requires Python v2.6 or greater (but less than v3), not %s"
382 vers_and_locs = dict(_vers_and_locs_list)
383 for requirement in install_requires:
385 check_requirement(requirement, vers_and_locs)
386 except (ImportError, PackagingError), e:
387 errors.append("%s: %s" % (e.__class__.__name__, e))
390 raise PackagingError(get_error_string(errors, debug=True))
392 check_all_requirements()
395 def get_package_versions():
396 return dict([(k, v) for k, (v, l, c) in _vers_and_locs_list])
398 def get_package_locations():
399 return dict([(k, l) for k, (v, l, c) in _vers_and_locs_list])
401 def get_package_versions_string(show_paths=False, debug=False):
403 for p, (v, loc, comment) in _vers_and_locs_list:
404 info = str(p) + ": " + str(v)
406 info = info + " [%s]" % str(comment)
408 info = info + " (%s)" % str(loc)
411 output = "\n".join(res) + "\n"
413 if not hasattr(sys, 'frozen'):
414 errors = cross_check_pkg_resources_versus_import()
416 output += get_error_string(errors, debug=debug)