# HG changeset patch
# User Matt Harbison <matt_harbison@yahoo.com>
# Date 1547871776 18000
# Node ID b5d7413e40099d71d29d2343624e4344ad8f2b07
# Parent  86f6b441adea972b2a297ca1944745b0287a7979
help: document the minimumhgversion variable for extensions

diff -r 86f6b441adea -r b5d7413e4009 mercurial/help/internals/extensions.txt
--- a/mercurial/help/internals/extensions.txt	Fri Jan 18 23:13:04 2019 -0500
+++ b/mercurial/help/internals/extensions.txt	Fri Jan 18 23:22:56 2019 -0500
@@ -313,6 +313,14 @@
 
     buglink = 'https://bitbucket.org/USER/REPO/issues'
 
+If an extension requires a minimum version of Mercurial, it can be declared
+with the ``minimumhgversion`` variable::
+
+    minimumhgversion = '4.6'
+
+Older clients will print a warning that the extension requires a new version,
+instead of attempting to load it.
+
 Wrap up: what belongs where?
 ============================