mirror of
https://github.com/revng/revng
synced 2026-06-21 14:07:57 +00:00
Giacomo Vercesi
2fc11ab055
Add the possibility of passing a list of FIFOs to `revng daemon`. These can be used to notify an external program when a non-reproducible change (binary, context) has occurred.
70 lines
2.1 KiB
Python
70 lines
2.1 KiB
Python
#
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# This file is distributed under the MIT License. See LICENSE.md for details.
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#
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import logging
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import os
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from abc import ABC, abstractmethod
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from pathlib import Path
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from tempfile import mkdtemp
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from revng.api.listenable_manager import EventType, ListenableManager
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from revng.api.manager import Manager
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class BaseListener(ABC):
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def __init__(self, fifo_path: Path):
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self.fifo = open(fifo_path, "w") # noqa: SIM115
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@abstractmethod
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def __call__(self, manager: Manager, type_: EventType):
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pass
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def write_fifo(self, content: str):
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try:
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self.fifo.write(content)
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self.fifo.flush()
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except (BrokenPipeError, FileNotFoundError, PermissionError, TimeoutError) as e:
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logging.warn(
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f"Encountered error when writing to notification pipe: {repr(e)}",
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)
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def __del__(self):
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self.fifo.close()
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class BeginListener(BaseListener):
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def __call__(self, manager: Manager, type_: EventType):
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assert type_ == EventType.BEGIN
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begin_step = manager.get_step("begin")
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assert begin_step is not None
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tmpdir = mkdtemp()
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begin_step.save(tmpdir)
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self.write_fifo(f"PUSH begin {tmpdir}\n")
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class ContextListener(BaseListener):
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def __call__(self, manager: Manager, type_: EventType):
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assert type_ == EventType.CONTEXT
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tmpdir = mkdtemp()
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manager.save_context(tmpdir)
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self.write_fifo(f"PUSH context {tmpdir}\n")
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def make_manager(workdir: Path):
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if "REVNG_NOTIFY_FIFOS" not in os.environ:
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return Manager(str(workdir.resolve()))
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manager = ListenableManager(str(workdir.resolve()))
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for fifo_definition in os.environ["REVNG_NOTIFY_FIFOS"].split(","):
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fifo_path, string_type = fifo_definition.split(":", 1)
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if string_type == "begin":
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manager.add_event_listener(EventType.BEGIN, BeginListener(Path(fifo_path)))
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elif string_type == "context":
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manager.add_event_listener(EventType.CONTEXT, ContextListener(Path(fifo_path)))
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else:
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logging.warn(f"Unknown event type specified for fifo: {string_type}")
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return manager
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