From 5f9dcd5364993f32e6841ffdfefce1cc87017b22 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 22 Nov 2018 12:24:38 +0200
Subject: Make backwards modification time check permanent, add another
 experiment

---
 build2/cli/rule.cxx | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

(limited to 'build2/cli')

diff --git a/build2/cli/rule.cxx b/build2/cli/rule.cxx
index 6c87490..d07af15 100644
--- a/build2/cli/rule.cxx
+++ b/build2/cli/rule.cxx
@@ -234,9 +234,8 @@ namespace build2
       // We use depdb to track changes to the .cli file name, options,
       // compiler, etc.
       //
+      depdb dd (tp + ".d");
       {
-        depdb dd (tp + ".d");
-
         // First should come the rule name/version.
         //
         if (dd.expect ("cli.compile 1") != nullptr)
@@ -259,14 +258,14 @@ namespace build2
         //
         if (dd.expect (s.path ()) != nullptr)
           l4 ([&]{trace << "input file mismatch forcing update of " << t;});
+      }
 
-        // Update if depdb mismatch.
-        //
-        if (dd.writing () || dd.mtime > mt)
-          update = true;
+      // Update if depdb mismatch.
+      //
+      if (dd.writing () || dd.mtime > mt)
+        update = true;
 
-        dd.close ();
-      }
+      dd.close ();
 
       // If nothing changed, then we are done.
       //
@@ -325,6 +324,8 @@ namespace build2
 
       run (cli, args);
 
+      dd.verify (tp);
+
       t.mtime (system_clock::now ());
       return target_state::changed;
     }
-- 
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