calibre-web/cps/dep_check.py

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import os
import re
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import sys
import json
from .constants import BASE_DIR
try:
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from importlib.metadata import version
importlib = True
ImportNotFound = BaseException
except ImportError:
importlib = False
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version = None
if not importlib:
try:
import pkg_resources
from pkg_resources import DistributionNotFound as ImportNotFound
pkgresources = True
except ImportError as e:
pkgresources = False
def load_dependencies(optional=False):
deps = list()
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if getattr(sys, 'frozen', False):
pip_installed = os.path.join(BASE_DIR, ".pip_installed")
if os.path.exists(pip_installed):
with open(pip_installed) as f:
exe_deps = json.loads("".join(f.readlines()))
else:
return deps
if importlib or pkgresources:
if optional:
req_path = os.path.join(BASE_DIR, "optional-requirements.txt")
else:
req_path = os.path.join(BASE_DIR, "requirements.txt")
if os.path.exists(req_path):
with open(req_path, 'r') as f:
for line in f:
if not line.startswith('#') and not line == '\n' and not line.startswith('git'):
res = re.match(r'(.*?)([<=>\s]+)([\d\.]+),?\s?([<=>\s]+)?([\d\.]+)?', line.strip())
try:
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if getattr(sys, 'frozen', False):
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dep_version = exe_deps[res.group(1).lower().replace('_', '-')]
else:
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if importlib:
dep_version = version(res.group(1))
else:
dep_version = pkg_resources.get_distribution(res.group(1)).version
except (ImportNotFound, KeyError):
if optional:
continue
dep_version = "not installed"
deps.append([dep_version, res.group(1), res.group(2), res.group(3), res.group(4), res.group(5)])
return deps
def dependency_check(optional=False):
d = list()
deps = load_dependencies(optional)
for dep in deps:
try:
dep_version_int = [int(x) for x in dep[0].split('.')]
low_check = [int(x) for x in dep[3].split('.')]
high_check = [int(x) for x in dep[5].split('.')]
except AttributeError:
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high_check = []
except ValueError:
d.append({'name': dep[1],
'target': "available",
'found': "Not available"
})
continue
if dep[2].strip() == "==":
if dep_version_int != low_check:
d.append({'name': dep[1],
'found': dep[0],
"target": dep[2] + dep[3]})
continue
elif dep[2].strip() == ">=":
if dep_version_int < low_check:
d.append({'name': dep[1],
'found': dep[0],
"target": dep[2] + dep[3]})
continue
elif dep[2].strip() == ">":
if dep_version_int <= low_check:
d.append({'name': dep[1],
'found': dep[0],
"target": dep[2] + dep[3]})
continue
if dep[4] and dep[5]:
if dep[4].strip() == "<":
if dep_version_int >= high_check:
d.append(
{'name': dep[1],
'found': dep[0],
"target": dep[4] + dep[5]})
continue
elif dep[4].strip() == "<=":
if dep_version_int > high_check:
d.append(
{'name': dep[1],
'found': dep[0],
"target": dep[4] + dep[5]})
continue
return d