# HG changeset patch
# User Yuya Nishihara <yuya@tcha.org>
# Date 1427206249 -32400
# Node ID 3c32a3fdfd16a43fceb5ab4c79658cd2b03b0232
# Parent  ec5b56b50e1946245728f4e27fec5523a9a26913
fileset: extract function that builds initial subset from ctx or status

This function will be used to recalculate subset when mctx.ctx is switched.

diff -r ec5b56b50e19 -r 3c32a3fdfd16 mercurial/fileset.py
--- a/mercurial/fileset.py	Sat Jan 24 19:55:14 2015 +0900
+++ b/mercurial/fileset.py	Tue Mar 24 23:10:49 2015 +0900
@@ -514,6 +514,15 @@
                 return True
     return False
 
+def _buildsubset(ctx, status):
+    if status:
+        subset = []
+        for c in status:
+            subset.extend(c)
+        return subset
+    else:
+        return list(ctx.walk(ctx.match([])))
+
 def getfileset(ctx, expr):
     tree = parse(expr)
 
@@ -528,13 +537,10 @@
         r = ctx.repo()
         status = r.status(ctx.p1(), ctx,
                           unknown=unknown, ignored=ignored, clean=True)
-        subset = []
-        for c in status:
-            subset.extend(c)
     else:
         status = None
-        subset = list(ctx.walk(ctx.match([])))
 
+    subset = _buildsubset(ctx, status)
     return getset(fullmatchctx(ctx, subset, status), tree)
 
 def prettyformat(tree):