[PATCH 1 of 5] obsolete: add isenabled function for option checking

Durham Goode durham at fb.com
Tue Oct 14 16:51:48 CDT 2014

# HG changeset patch
# User Durham Goode <durham at fb.com>
# Date 1413317855 25200
#      Tue Oct 14 13:17:35 2014 -0700
# Node ID a22ff14b5ff64123d37e1fc42cad86cf76a4c3b1
# Parent  75d0edb68b417964110e3fcd69187c867f31a119
obsolete: add isenabled function for option checking

Previously, obsolete used the module level _enabled flag to determine whether it
was on or off. We need a bit more granular control, so we'll be introducing
toggle options. The isenabled() function is how you check if a particular option
is enabled for the given repository.

Future patches will add options such as 'createmarkers', 'allowunstable', and
'exchange' to enable various features of obsolete markers.

diff --git a/mercurial/obsolete.py b/mercurial/obsolete.py
--- a/mercurial/obsolete.py
+++ b/mercurial/obsolete.py
@@ -1144,3 +1144,18 @@ def createmarkers(repo, relations, flag=
+def isenabled(repo, option):
+    """Returns True if the given repository has the given obsolete option
+    enabled.
+    """
+    result = set(repo.ui.configlist('experimental', 'obsoleteoptions'))
+    if 'all' in result:
+        return True
+    # For migration purposes, temporarily return true if the config hasn't been
+    # set but _enabled is true.
+    if len(result) == 0 and _enabled:
+        return True
+    return option in result

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