[metapost] mptopdf corrupts source file

[Nicola]

In article <2B7067F2-9ED0-4924-B513-588034F425E6 at mac.com>,
 Franck Pastor <franck.pastor at mac.com> wrote:

> Le 15 janv. 10 à 10:08, Oliver Buerschaper a écrit :
> 
> > Dear all,
> >
> > I'm experiencing some issues with mptopdf in different scenarios...
> >
> > Suppose there are no errors in the MetaPost source file. Then the  
> > mptopdf program included in (a fresh) TeXLive 2009 seems to rename  
> > "file.mp" to "file" and then create "file.mp" again during  
> > compilation. The result: front ends like TeXShop track the original  
> > file and one ends up with the source "file" rather than "file.mp"  
> > opened in the editor window. After editing you can only typeset  
> > again if you "Save as" before. Quite annoying. In TeXLive 2008 the  
> > problem doesn't occur.
> >
> > Now assume that the MetaPost source file does contain an error. Then  
> > it's copied to "file.mp.copy" by mptopdf. This file is what the  
> > front end keeps opened. Hence correcting the error in the editor  
> > window and recompiling again needs a "Save as" beforehand which is  
> > rather time-consuming. This bug occurs both in TeXLive 2008 and 2009.
> >
> > Also in some cases mptopdf appears to append empty lines to the  
> > source file. Still investigating though.

I have written the scripts to typeset MetaPost files from TeXShop (when 
you choose 'mptopdf' in the Preferences). I cannot reproduce the 
problems you mention. Maybe you could send me a source file that 
exhibits the bug?

Nicola