From 9c03a7696d3602d405d5176c3bf53b9aef8a3d6c Mon Sep 17 00:00:00 2001
From: Gregory Szorc <gregory.szorc@gmail.com>
Date: Wed, 18 Jan 2017 22:45:07 -0800
Subject: [PATCH] statprof: require input file

statprof has a __main__ handler that allows viewing of previously
written data files. As Yuya pointed out during review, 82ee01726a77
broke this. This patch fixes that.
---
 mercurial/statprof.py | 4 ++++
 tests/test-profile.t  | 6 ++++++
 2 files changed, 10 insertions(+)

diff --git a/mercurial/statprof.py b/mercurial/statprof.py
index 8f5da57390..71aa1de17f 100755
--- a/mercurial/statprof.py
+++ b/mercurial/statprof.py
@@ -800,6 +800,10 @@ def main(argv=None):
         else:
             assert False, "unhandled option %s" % o
 
+    if not path:
+        print('must specify --file to load')
+        return 1
+
     load_data(path=path)
 
     display(**displayargs)
diff --git a/tests/test-profile.t b/tests/test-profile.t
index dbcb595179..8d59cb9fa6 100644
--- a/tests/test-profile.t
+++ b/tests/test-profile.t
@@ -92,4 +92,10 @@ Various statprof formatters work
   $ cat ../out
   \[\[\d+.* (re)
 
+statprof can be used as a standalone module
+
+  $ $PYTHON -m mercurial.statprof hotpath
+  must specify --file to load
+  [1]
+
   $ cd ..