From 3fb8d718695f013ecc48c63706207a4004daa390 Mon Sep 17 00:00:00 2001
From: Georg Baum <baum@lyx.org>
Date: Sun, 3 Jul 2016 19:48:15 +0200
Subject: [PATCH] Fix CAS input on windows (bug 10262)

This is the well known file locking problem: The TempFile class keeps the
created file locked for the own process, and this prevents the CAS to read it.
---
 src/mathed/MathExtern.cpp | 10 ++++++++--
 status.22x                |  2 ++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/mathed/MathExtern.cpp b/src/mathed/MathExtern.cpp
index 7fbb4af732..c6ba26fc61 100644
--- a/src/mathed/MathExtern.cpp
+++ b/src/mathed/MathExtern.cpp
@@ -1000,8 +1000,13 @@ namespace {
 	{
 		// In order to avoid parsing problems with command interpreters
 		// we pass input data through a file
-		TempFile tempfile("casinput");
-		FileName const cas_tmpfile = tempfile.name();
+		// Since the CAS is supposed to read the temp file we need
+		// to unlock it on windows (bug 10262).
+		auto_ptr<TempFile> tempfile(new TempFile("casinput"));
+		tempfile->setAutoRemove(false);
+		FileName const cas_tmpfile = tempfile->name();
+		tempfile.reset();
+
 		if (cas_tmpfile.empty()) {
 			lyxerr << "Warning: cannot create temporary file."
 			       << endl;
@@ -1015,6 +1020,7 @@ namespace {
 		lyxerr << "calling: " << cmd
 		       << "\ninput: '" << data << "'" << endl;
 		cmd_ret const ret = runCommand(command);
+		cas_tmpfile.removeFile();
 		return ret.second;
 	}
 
diff --git a/status.22x b/status.22x
index f4d5840c25..e384377c64 100644
--- a/status.22x
+++ b/status.22x
@@ -81,6 +81,8 @@ What's new
 
 - Load math packages automatically with JSS template (bug 9242).
 
+- Calling a Computer Algebra System from LyX works again (windows only bug 10262).
+
 
 * LYX2LYX