diff -r 16b48ebf656e -r 33c0c25d0b0f mercurial/error.py
--- a/mercurial/error.py	Wed May 19 15:10:49 2021 +0200
+++ b/mercurial/error.py	Tue May 18 17:15:49 2021 -0700
@@ -185,10 +185,11 @@
 class Abort(Hint, Exception):
     """Raised if a command needs to print an error and exit."""
 
-    def __init__(self, message, hint=None):
+    def __init__(self, message, hint=None, detailed_exit_code=None):
         # type: (bytes, Optional[bytes]) -> None
         self.message = message
         self.hint = hint
+        self.detailed_exit_code = detailed_exit_code
         # Pass the message into the Exception constructor to help extensions
         # that look for exc.args[0].
         Exception.__init__(self, message)
@@ -220,6 +221,11 @@
     Examples: Invalid command, invalid flags, invalid revision.
     """
 
+    def __init__(self, message, hint=None):
+        super(InputError, self).__init__(
+            message, hint=hint, detailed_exit_code=10
+        )
+
 
 class StateError(Abort):
     """Indicates that the operation might work if retried in a different state.
@@ -227,6 +233,11 @@
     Examples: Unresolved merge conflicts, unfinished operations.
     """
 
+    def __init__(self, message, hint=None):
+        super(StateError, self).__init__(
+            message, hint=hint, detailed_exit_code=20
+        )
+
 
 class CanceledError(Abort):
     """Indicates that the user canceled the operation.
@@ -234,6 +245,11 @@
     Examples: Close commit editor with error status, quit chistedit.
     """
 
+    def __init__(self, message, hint=None):
+        super(CanceledError, self).__init__(
+            message, hint=hint, detailed_exit_code=250
+        )
+
 
 class SecurityError(Abort):
     """Indicates that some aspect of security failed.
@@ -242,6 +258,11 @@
     filesystem, mismatched GPG signature, DoS protection.
     """
 
+    def __init__(self, message, hint=None):
+        super(SecurityError, self).__init__(
+            message, hint=hint, detailed_exit_code=150
+        )
+
 
 class HookLoadError(Abort):
     """raised when loading a hook fails, aborting an operation
@@ -254,13 +275,20 @@
 
     Exists to allow more specialized catching."""
 
+    def __init__(self, message, hint=None):
+        super(HookAbort, self).__init__(
+            message, hint=hint, detailed_exit_code=40
+        )
+
 
 class ConfigError(Abort):
     """Exception raised when parsing config files"""
 
     def __init__(self, message, location=None, hint=None):
         # type: (bytes, Optional[bytes], Optional[bytes]) -> None
-        super(ConfigError, self).__init__(message, hint=hint)
+        super(ConfigError, self).__init__(
+            message, hint=hint, detailed_exit_code=30
+        )
         self.location = location
 
     def format(self):
@@ -307,6 +335,11 @@
 class RemoteError(Abort):
     """Exception raised when interacting with a remote repo fails"""
 
+    def __init__(self, message, hint=None):
+        super(RemoteError, self).__init__(
+            message, hint=hint, detailed_exit_code=100
+        )
+
 
 class OutOfBandError(RemoteError):
     """Exception raised when a remote repo reports failure"""
@@ -327,7 +360,9 @@
 
     def __init__(self, message, location=None, hint=None):
         # type: (bytes, Optional[Union[bytes, int]], Optional[bytes]) -> None
-        super(ParseError, self).__init__(message, hint=hint)
+        super(ParseError, self).__init__(
+            message, hint=hint, detailed_exit_code=10
+        )
         self.location = location
 
     def format(self):