Current File : //lib/python3/dist-packages/reportlab/rl_config.py
'''module that aggregates config information'''
__all__=('_reset','register_reset')
def _defaults_init():
'''
create & return defaults for all reportlab settings from
reportlab.rl_settings.py
reportlab.local_rl_settings.py
reportlab_settings.py or ~/.reportlab_settings
latter values override earlier
'''
from reportlab.lib.utils import rl_exec
import os
_DEFAULTS={}
rl_exec('from reportlab.rl_settings import *',_DEFAULTS)
_overrides=_DEFAULTS.copy()
try:
rl_exec('from reportlab.local_rl_settings import *',_overrides)
_DEFAULTS.update(_overrides)
except ImportError:
pass
_overrides=_DEFAULTS.copy()
try:
rl_exec('from reportlab_settings import *',_overrides)
_DEFAULTS.update(_overrides)
except ImportError:
_overrides=_DEFAULTS.copy()
try:
try:
fn = os.path.expanduser(os.path.join('~','.reportlab_settings')) #appengine fails with KeyError/ImportError (dev/live)
except (KeyError, ImportError):
fn = None
if fn:
with open(fn,'rb') as f:
rl_exec(f.read(),_overrides)
_DEFAULTS.update(_overrides)
except:
pass
return _DEFAULTS
_DEFAULTS=_defaults_init()
_SAVED = {}
sys_version=None
def _enumChk(name,value,allowed=()):
if value not in allowed:
raise ValueError(f'invalid value {value!r} for rl_config.{name}\nneed one of {allowed}')
from functools import partial
_rlChecks=dict(
renderPMBackend = partial(_enumChk,allowed=('rlPyCairo','_renderPM')),
xmlParser = partial(_enumChk,allowed=('lxml','pyrxp')),
textPaths = partial(_enumChk,allowed=('freetype','_renderPM','backend')),
)
#this is used to set the options from
def _setOpt(name, value, conv=None, chk=None):
'''set a module level value from environ/default'''
from os import environ
ename = 'RL_'+name
if ename in environ:
value = environ[ename]
if conv: value = conv(value)
chk = _rlChecks.get(name,None)
if chk: chk(name,value)
globals()[name] = value
def _startUp():
'''This function allows easy resetting to the global defaults
If the environment contains 'RL_xxx' then we use the value
else we use the given default'''
import os, sys
global sys_version, _unset_
sys_version = sys.version.split()[0] #strip off the other garbage
from reportlab.lib import pagesizes
from reportlab.lib.utils import rl_isdir
if _SAVED=={}:
_unset_ = getattr(sys,'_rl_config__unset_',None)
if _unset_ is None:
class _unset_: pass
sys._rl_config__unset_ = _unset_ = _unset_()
global __all__
A = list(__all__)
for k,v in _DEFAULTS.items():
_SAVED[k] = globals()[k] = v
if k not in __all__:
A.append(k)
__all__ = tuple(A)
#places to search for Type 1 Font files
import reportlab
D = {'REPORTLAB_DIR': os.path.abspath(os.path.dirname(reportlab.__file__)),
'CWD': os.getcwd(),
'disk': os.getcwd().split(':')[0],
'sys_version': sys_version,
'XDG_DATA_HOME': os.environ.get('XDG_DATA_HOME','~/.local/share'),
}
for k in _SAVED:
if k.endswith('SearchPath'):
P=[]
for p in _SAVED[k]:
d = (p % D).replace('/',os.sep)
if '~' in d:
try:
d = os.path.expanduser(d) #appengine fails with KeyError/ImportError (dev/live)
except (KeyError, ImportError):
continue
if rl_isdir(d): P.append(d)
_setOpt(k,os.pathsep.join(P),lambda x:x.split(os.pathsep))
globals()[k] = list(filter(rl_isdir,globals()[k]))
else:
v = _SAVED[k]
if isinstance(v,(int,float)):
conv = type(v)
elif k=='defaultPageSize':
conv = lambda v,M=pagesizes: getattr(M,v)
elif k in ('trustedHosts','trustedSchemes'):
conv = lambda v: None if v is None else [y for y in [x.strip() for x in v.split(',')] if y] if isinstance(v,str) else v
else: conv = None
_setOpt(k,v,conv)
_registered_resets=[]
def register_reset(func):
'''register a function to be called by rl_config._reset'''
_registered_resets[:] = [x for x in _registered_resets if x()]
L = [x for x in _registered_resets if x() is func]
if L: return
from weakref import ref
_registered_resets.append(ref(func))
def _reset():
'''attempt to reset reportlab and friends'''
_startUp() #our reset
for f in _registered_resets[:]:
c = f()
if c:
c()
else:
_registered_resets.remove(f)
_startUp()
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