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Print an example "pip install" line for a missing requirement

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This commit is contained in:
Mark Haines 2015-09-01 16:47:26 +01:00
parent 236245f7d8
commit 3cdfd37d95
2 changed files with 26 additions and 8 deletions
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15
synapse/app/homeserver.py
View File

@ -16,10 +16,23 @@
import sys
sys.dont_write_bytecode = True
from synapse.python_dependencies import check_requirements, DEPENDENCY_LINKS
from synapse.python_dependencies import (
check_requirements, DEPENDENCY_LINKS, MissingRequirementError
)
if __name__ == '__main__':
try:
check_requirements()
except MissingRequirementError as e:
message = "\n".join([
"Missing Requirement: %s" % (e.message,),
"To install run:",
" pip install --upgrade --force \"%s\"" % (e.dependency,),
"",
])
sys.stderr.writelines(message)
sys.exit(1)
from synapse.storage.engines import create_engine, IncorrectDatabaseSetup
from synapse.storage import (

17
synapse/python_dependencies.py
View File

@ -60,7 +60,10 @@ DEPENDENCY_LINKS = {
class MissingRequirementError(Exception):
pass
def __init__(self, message, module_name, dependency):
super(MissingRequirementError, self).__init__(message)
self.module_name = module_name
self.dependency = dependency
def check_requirements(config=None):
@ -88,7 +91,7 @@ def check_requirements(config=None):
)
raise MissingRequirementError(
"Can't import %r which is part of %r"
% (module_name, dependency)
% (module_name, dependency), module_name, dependency
)
version = getattr(module, "__version__", None)
file_path = getattr(module, "__file__", None)
@ -101,23 +104,25 @@ def check_requirements(config=None):
if version is None:
raise MissingRequirementError(
"Version of %r isn't set as __version__ of module %r"
% (dependency, module_name)
% (dependency, module_name), module_name, dependency
)
if LooseVersion(version) < LooseVersion(required_version):
raise MissingRequirementError(
"Version of %r in %r is too old. %r < %r"
% (dependency, file_path, version, required_version)
% (dependency, file_path, version, required_version),
module_name, dependency
)
elif version_test == "==":
if version is None:
raise MissingRequirementError(
"Version of %r isn't set as __version__ of module %r"
% (dependency, module_name)
% (dependency, module_name), module_name, dependency
)
if LooseVersion(version) != LooseVersion(required_version):
raise MissingRequirementError(
"Unexpected version of %r in %r. %r != %r"
% (dependency, file_path, version, required_version)
% (dependency, file_path, version, required_version),
module_name, dependency
)