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Python Config Generator: allow comments everywhere
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parent
49ac4bd161
commit
8496c4b469
@ -1,22 +1,34 @@
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from datetime import datetime
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from datetime import datetime
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from weakref import WeakKeyDictionary
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from weakref import WeakKeyDictionary
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import itertools
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class ConfigObject:
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class ConfigObject:
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def __init__(self):
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def __init__(self, comment=None):
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self.symbols = {}
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self.symbols = {}
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self.config = WeakKeyDictionary()
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self.config = WeakKeyDictionary()
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self.comment = None
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self.comment = comment
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def __str__(self):
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def isp(self, indent):
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return "" if self.comment is None else f"# {self.comment}\n"
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return " " * indent
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def append(self):
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return "" if self.comment is None else f" # {self.comment}"
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def lines(self, indent):
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return [] if self.comment is None else [ f"{self.isp(indent)}# {self.comment}" ]
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def writelines(self, f):
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f.writelines([ x + "\n" for x in self.lines(0) ])
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class Timestamp(ConfigObject):
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class Timestamp(ConfigObject):
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def __init__(self, comment):
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def __init__(self, comment):
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super().__init__()
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super().__init__(comment=f"{comment} at {datetime.now()}")
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self.comment = f"{comment} at {datetime.now()}"
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class BlockOption(ConfigObject):
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def __init__(self, config_text, _type, value, **kwargs):
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super().__init__(**kwargs)
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class BlockOption:
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def __init__(self, config_text, _type, value):
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if not isinstance(value, _type):
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if not isinstance(value, _type):
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raise Exception("BlockOption value doesn't match declared type")
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raise Exception("BlockOption value doesn't match declared type")
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@ -24,47 +36,59 @@ class BlockOption:
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self._type = _type
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self._type = _type
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self.value = value
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self.value = value
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def set(self, value):
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def set(self, value, **kwargs):
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if value == self.value:
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if value == self.value and len(kwargs) == 0:
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return self
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return self
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else:
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else:
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return type(self)(self.config_text, self._type, value)
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return type(self)(self.config_text, self._type, value, **kwargs)
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class ProtocolConfig(ConfigObject):
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def lines(self, indent):
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return [ f"{self.isp(indent)}{self.config_text} {self.value};{self.append()}" ]
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class ConfigBlock(ConfigObject):
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def __init__(self, **kwargs):
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super().__init__(**{ k:v for k,v in kwargs.items() if k not in self.options })
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self.options_set = {}
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for k,v in kwargs.items():
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if k in self.options:
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self.options_set[k] = self.options[k].set(v)
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def set(self, arg, val, **kwargs):
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if arg not in self.options:
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raise NotImplementedError
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self.options_set[arg] = self.options[arg].set(val, **kwargs)
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def lines(self, indent):
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inside = [
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(opt.lines(indent+1))
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for k,opt in self.options_set.items()
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if opt != self.options[k]
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]
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header = self.block_header()
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isp = " " * indent
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if len(inside) == 0:
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return [ header + " {}" + self.append() ]
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else:
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return [ *super().lines(indent), isp + header + " {", *itertools.chain(*inside), isp + "}" ]
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class ProtocolConfig(ConfigBlock):
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options = {
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options = {
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"disabled": BlockOption("disabled", bool, False),
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"disabled": BlockOption("disabled", bool, False),
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}
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}
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def __init__(self, name=None, template=None, **kwargs):
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def __init__(self, name=None, template=None, **kwargs):
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super().__init__()
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super().__init__(**kwargs)
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self.name = name
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self.name = name
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if template is not None:
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if template is not None:
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raise NotImplementedError()
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raise NotImplementedError()
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self.options_set = {}
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def block_header(self):
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for k in kwargs:
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return f"protocol {self.protocol_type}{'' if self.name is None else ' ' + self.name }"
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if k not in self.options:
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raise NotImplementedError()
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self.options_set[k] = self.options[k].set(kwargs[k])
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def block_inside(self, indent):
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if len(self.options_set) == 0:
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return None
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return ("\n" + " " * indent).join([""] + [
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f"{opt.config_text} {opt.value};" for k,opt in self.options_set.items() if opt != self.options[k]
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])
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def __str__(self):
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inside = self.block_inside(1)
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header = f"protocol {self.protocol_type}{'' if self.name is None else ' ' + self.name }"
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if inside is None:
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return header + " {}\n"
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else:
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return header + " {" + inside + "\n}\n"
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class DeviceProtocolConfig(ProtocolConfig):
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class DeviceProtocolConfig(ProtocolConfig):
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name_prefix = "device"
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name_prefix = "device"
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@ -23,7 +23,7 @@ class Config:
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def __enter__(self):
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def __enter__(self):
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if self.config.auto_device:
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if self.config.auto_device:
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self.auto_device = DeviceProtocolConfig()
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self.auto_device = DeviceProtocolConfig(comment="Default device protocol; set Config(auto_device=False) to remove")
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self.begin = Timestamp("Config dump started")
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self.begin = Timestamp("Config dump started")
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self.config.add(self.begin)
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self.config.add(self.begin)
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@ -37,12 +37,12 @@ class Config:
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if isinstance(i, DeviceProtocolConfig):
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if isinstance(i, DeviceProtocolConfig):
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self.auto_device = None
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self.auto_device = None
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_file.write(str(i))
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i.writelines(_file)
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if self.auto_device is not None:
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if self.auto_device is not None:
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_file.write(str(self.auto_device))
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self.auto_device.writelines(_file)
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_file.write(str(Timestamp("Config dump finished")))
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Timestamp("Config dump finished").writelines(_file)
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def __exit__(self, *args):
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def __exit__(self, *args):
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self.config.remove(self.begin)
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self.config.remove(self.begin)
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@ -2,6 +2,8 @@ from BIRD import Config
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from BIRD.Config import DeviceProtocolConfig
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from BIRD.Config import DeviceProtocolConfig
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cf = Config()
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cf = Config()
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cf.add(DeviceProtocolConfig(name="foo", scan_time=42))
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cf.add(dev := DeviceProtocolConfig(name="foo", comment="my own device protocol"))
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dev.set("scan_time", 86400, comment="once a day, my interfaces never change")
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#cf.add(DeviceProtocolConfig(name="foo", scan_time=42, comment="my own device protocol"))
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cf.write("test.conf")
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cf.write("test.conf")
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