From 58d2fac91d0da7312e3ef147b6b290ea16031da8 Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Mon, 16 Nov 2015 05:53:10 -0500
Subject: [PATCH] AutoDelete: Add default constructor with deletion disabled

---
 src/libstore/build.cc | 2 +-
 src/libutil/util.cc   | 8 ++++++++
 src/libutil/util.hh   | 2 ++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 6f662f81d..6112d528c 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -2534,7 +2534,7 @@ void DerivationGoal::runChild()
 
             Path sandboxFile = drvPath + ".sb";
             if (pathExists(sandboxFile)) deletePath(sandboxFile);
-            autoDelSandbox = AutoDelete(sandboxFile);
+            autoDelSandbox.reset(sandboxFile, false);
 
             writeFile(sandboxFile, sandboxProfile);
 
diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index 27116fd18..84f578eec 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -599,6 +599,8 @@ string drainFD(int fd)
 //////////////////////////////////////////////////////////////////////
 
 
+AutoDelete::AutoDelete() : del{false} {}
+
 AutoDelete::AutoDelete(const string & p, bool recursive) : path(p)
 {
     del = true;
@@ -626,6 +628,12 @@ void AutoDelete::cancel()
     del = false;
 }
 
+void AutoDelete::reset(const Path & p, bool recursive = true) {
+    this-> p = p;
+    this->recursive = recursive;
+    del = true;
+}
+
 
 
 //////////////////////////////////////////////////////////////////////
diff --git a/src/libutil/util.hh b/src/libutil/util.hh
index 23d01e9a6..f4026a0a8 100644
--- a/src/libutil/util.hh
+++ b/src/libutil/util.hh
@@ -199,9 +199,11 @@ class AutoDelete
     bool del;
     bool recursive;
 public:
+    AutoDelete();
     AutoDelete(const Path & p, bool recursive = true);
     ~AutoDelete();
     void cancel();
+    void reset(const Path & p, bool recursive = true);
     operator Path() const { return path; }
 };