tachyon fails with .ac in hostname

[wjp]

When your hostname contains the string .ac, the name of a temporary file will also contain this string, and then tachyon's automatic file format detection will assume the input file is an ac3d file rather than the default tachyon scene file.

This causes tachyon to fail entirely on my machine in the domain .ua.ac.be and is likely also the cause of ​http://www.mail-archive.com/sage-support@googlegroups.com/msg11743.html .

The error message shown is "Unknown version of AC3D Model File Format".

The relevant lines in tachyon's main.c are

    else if (strstr(filename, ".ac") || strstr(filename, ".AC")) {
      rc = ParseAC3D(filename, scene); /* Must be an AC3D file */
    }

[wjp]

Updated SPKG, based on the one in #5281, at:

​http://www.math.leidenuniv.nl/~wpalenst/sage/tachyon-0.98.9.p1.spkg

For convenience, the applied patch is attached to this ticket too.

[fbissey]

Looks good to me. I would have done something similar. Did you forward that upstream?

[wjp]

Yes, I did.

[vbraun]

Awesome!#@#@