Fix AttributeError in log-errors check (#85)

ch_tools/common/cli/parameters.py

@@ -52,6 +52,20 @@ def convert(self, value, param, ctx):
         return _preprocess_value(value)
 
 
+class RegexpParamType(click.ParamType):
+    """
+    Command-line parameter type for regular expressions.
+    """
+
+    name = "regexp"
+
+    def convert(self, value, param, ctx):
+        try:
+            return re.compile(value)
+        except re.error:
+            raise click.BadParameter("Value should be a valid regular expression.")
+
+
 class TimeSpanParamType(click.ParamType):
     """
     Command-line parameter type for times span values.

ch_tools/monrun_checks/ch_log_errors.py

@@ -4,6 +4,7 @@
 import click
 from file_read_backwards import FileReadBackwards
 
+from ch_tools.common.cli.parameters import RegexpParamType
 from ch_tools.common.result import Result
 
 REGEXP = re.compile(
@@ -12,13 +13,6 @@
 DEFAULT_EXCLUDE = r"e\.displayText\(\) = No message received"
 
 
-def validate_exclude(ctx, param, value):  # pylint: disable=unused-argument
-    try:
-        return re.compile(value if value is not None else DEFAULT_EXCLUDE)
-    except re.error:
-        raise click.BadParameter("Value should be a valid regular expression.")
-
-
 @click.command("log-errors")
 @click.option(
     "-c", "--critical", "crit", type=int, default=60, help="Critical threshold."
@@ -36,8 +30,8 @@ def validate_exclude(ctx, param, value):  # pylint: disable=unused-argument
     "-e",
     "--exclude",
     "exclude",
+    type=RegexpParamType(),
     default=DEFAULT_EXCLUDE,
-    callback=validate_exclude,
     help="Excluded error.",
 )
 @click.option(