From 047a5e4d6656f362151b855b34c259708b8419ba Mon Sep 17 00:00:00 2001
From: Ben Boeckel <ben.boeckel@kitware.com>
Date: Wed, 1 Mar 2017 13:40:22 -0500
Subject: cmWorkingDirectory: add class for changing the workdir

---
 Source/CMakeLists.txt         |  2 ++
 Source/cmWorkingDirectory.cxx | 24 ++++++++++++++++++++++++
 Source/cmWorkingDirectory.h   | 25 +++++++++++++++++++++++++
 bootstrap                     |  1 +
 4 files changed, 52 insertions(+)
 create mode 100644 Source/cmWorkingDirectory.cxx
 create mode 100644 Source/cmWorkingDirectory.h

diff --git a/Source/CMakeLists.txt b/Source/CMakeLists.txt
index 76b98fc..e47a2eb 100644
--- a/Source/CMakeLists.txt
+++ b/Source/CMakeLists.txt
@@ -381,6 +381,8 @@ set(SRCS
   cmVariableWatch.h
   cmVersion.cxx
   cmVersion.h
+  cmWorkingDirectory.cxx
+  cmWorkingDirectory.h
   cmXMLParser.cxx
   cmXMLParser.h
   cmXMLSafe.cxx
diff --git a/Source/cmWorkingDirectory.cxx b/Source/cmWorkingDirectory.cxx
new file mode 100644
index 0000000..99c9ba8
--- /dev/null
+++ b/Source/cmWorkingDirectory.cxx
@@ -0,0 +1,24 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmWorkingDirectory.h"
+
+#include "cmSystemTools.h"
+
+cmWorkingDirectory::cmWorkingDirectory(std::string const& newdir)
+{
+  this->OldDir = cmSystemTools::GetCurrentWorkingDirectory();
+  cmSystemTools::ChangeDirectory(newdir);
+}
+
+cmWorkingDirectory::~cmWorkingDirectory()
+{
+  this->Pop();
+}
+
+void cmWorkingDirectory::Pop()
+{
+  if (!this->OldDir.empty()) {
+    cmSystemTools::ChangeDirectory(this->OldDir);
+    this->OldDir.clear();
+  }
+}
diff --git a/Source/cmWorkingDirectory.h b/Source/cmWorkingDirectory.h
new file mode 100644
index 0000000..af0fd44
--- /dev/null
+++ b/Source/cmWorkingDirectory.h
@@ -0,0 +1,25 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#ifndef cmWorkingDirectory_h
+#define cmWorkingDirectory_h
+
+#include <cmConfigure.h> // IWYU pragma: keep
+
+#include <string>
+
+/** \class cmWorkingDirectory
+ * \brief An RAII class to manipulate the working directory.
+ */
+class cmWorkingDirectory
+{
+public:
+  cmWorkingDirectory(std::string const& newdir);
+  ~cmWorkingDirectory();
+
+  void Pop();
+
+private:
+  std::string OldDir;
+};
+
+#endif
diff --git a/bootstrap b/bootstrap
index 8063edb..4f58365 100755
--- a/bootstrap
+++ b/bootstrap
@@ -404,6 +404,7 @@ CMAKE_CXX_SOURCES="\
   cmUnsetCommand \
   cmVersion \
   cmWhileCommand \
+  cmWorkingDirectory \
   cmake  \
   cmakemain \
   cmcmd  \
-- 
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