Remove python-daemon dependency

remove python-daemon since it uses unsupported dependency 'lockfile'

Fixes: #379

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>

Author: Akasurde

pyproject.toml

@@ -7,7 +7,7 @@ build-backend = "setuptools.build_meta"
 [[tool.mypy.overrides]]
 module = [
     "ansible.*",
-    "daemon.*",
+    "fasteners.*",
     "pexpect",
 ]
 ignore_missing_imports = true

src/ansible_runner/__main__.py

@@ -34,8 +34,6 @@
 from contextlib import contextmanager
 from uuid import uuid4
 
-import daemon
-from daemon.pidfile import TimeoutPIDLockFile
 from yaml import safe_dump, safe_load
 
 from ansible_runner import run
@@ -44,6 +42,7 @@
 from ansible_runner.utils import dump_artifact, Bunch, register_for_cleanup
 from ansible_runner.utils.capacity import get_cpu_count, get_mem_in_bytes, ensure_uuid
 from ansible_runner.utils.importlib_compat import importlib_metadata
+from ansible_runner.utils.locks import TimeoutProcessLock
 from ansible_runner.runner import Runner
 from ansible_runner.exceptions import AnsibleRunnerException
 
@@ -824,7 +823,7 @@ def main(sys_args=None):
     if vargs.get('command') in ('start', 'run', 'transmit', 'worker', 'process'):
 
         if vargs.get('command') == 'start':
-            context = daemon.DaemonContext(pidfile=TimeoutPIDLockFile(pidfile))
+            context = TimeoutProcessLock(pidfile).locked(5)
         else:
             context = threading.Lock()
 

src/ansible_runner/exceptions.py

@@ -1,11 +1,14 @@
-
 class AnsibleRunnerException(Exception):
-    """ Generic Runner Error """
+    """Generic Runner Error"""
 
 
 class ConfigurationError(AnsibleRunnerException):
-    """ Misconfiguration of Runner """
+    """Misconfiguration of Runner"""
 
 
 class CallbackError(AnsibleRunnerException):
-    """ Exception occurred in Callback """
+    """Exception occurred in Callback"""
+
+
+class ProcessLockException(Exception):
+    """Exception occurred in Locking process using fasteners"""

src/ansible_runner/utils/locks.py

@@ -0,0 +1,16 @@
+from contextlib import contextmanager
+from fasteners import InterProcessLock
+from ansible_runner.exceptions import ProcessLockException
+
+
+class TimeoutProcessLock(InterProcessLock):
+
+    @contextmanager
+    def locked(self, timeout):
+        ok = self.acquire(timeout=timeout)
+        if not ok:
+            raise ProcessLockException()
+        try:
+            yield
+        finally:
+            self.release()