From 8b98a6b3fae40487ac529a7118865df6a71159ee Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Sat, 22 Jul 2017 17:43:09 +0200
Subject: Implement detection of ignorable changes (whitespaces, comments)

---
 build2/filesystem.cxx | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'build2/filesystem.cxx')

diff --git a/build2/filesystem.cxx b/build2/filesystem.cxx
index 9d9b3b6..eefaf99 100644
--- a/build2/filesystem.cxx
+++ b/build2/filesystem.cxx
@@ -11,6 +11,22 @@ using namespace butl;
 
 namespace build2
 {
+  bool
+  touch (const path& p, bool create, uint16_t v)
+  {
+    if (verb >= v)
+      text << "touch " << p;
+
+    try
+    {
+      return touch_file (p, create);
+    }
+    catch (const system_error& e)
+    {
+      fail << "unable to touch file " << p << ": " << e << endf;
+    }
+  }
+
   fs_status<mkdir_status>
   mkdir (const dir_path& d, uint16_t v)
   {
-- 
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