# HG changeset patch
# User Sean Farley <sean.michael.farley@gmail.com>
# Date 1365640069 18000
# Node ID d8d548d868d3ad6eb0d43ed48c9762dde1fe2657
# Parent  3d265e0822d36332b0c995b22f58a90d841241ab
template: call runtemplate on the src argument to sub

This allows using a template keyword on calls to the sub function and brings
the function inline with most other semantics of the other template functions.

diff -r 3d265e0822d3 -r d8d548d868d3 mercurial/templater.py
--- a/mercurial/templater.py	Wed Apr 17 03:41:34 2013 +0200
+++ b/mercurial/templater.py	Wed Apr 10 19:27:49 2013 -0500
@@ -251,6 +251,8 @@
     pat = stringify(args[0][0](context, mapping, args[0][1]))
     rpl = stringify(args[1][0](context, mapping, args[1][1]))
     src = stringify(args[2][0](context, mapping, args[2][1]))
+    src = stringify(runtemplate(context, mapping,
+                                compiletemplate(src, context)))
     yield re.sub(pat, rpl, src)
 
 def if_(context, mapping, args):
diff -r 3d265e0822d3 -r d8d548d868d3 tests/test-command-template.t
--- a/tests/test-command-template.t	Wed Apr 17 03:41:34 2013 +0200
+++ b/tests/test-command-template.t	Wed Apr 10 19:27:49 2013 -0500
@@ -1531,3 +1531,7 @@
   $ hg log -R latesttag -r tip --template 'modified files: {file_mods % " {file}\n"}\n'
   modified files:  .hgtags
   
+Test the sub function of templating for expansion:
+
+  $ hg log -R latesttag -r 10 --template '{sub("[0-9]", "x", "{rev}")}\n'
+  xx