[Open-graphics] Open Graphics dual-licensing clarifications

[Mark Baker]

--- Petter Urkedal <petter.urkedal at nordita.dk> wrote:
> Or we could provide a template to use when creating a new file, and
> to
> cut-and-paste from if there is a mismatch.  Subversion allows us to
> report an instructive error message with guidance of how to fix the
> problem.
> 
> Some light flexibility is easy to implement.  How about something
> like this:
> 
>   * Match the first "Copyright..." lines with regular expressions.
> 
>   * Parse the rest of the license text into a string, erasing the
> starting comment characters.  Then normalise spaces  (replace any
> sequence of white-spaces with a single white space) and compare the
> hash
> of the result with the corresponding hash of the right license.
> This does not catch hyphen-
> continuations, but I think we can ban those.  I think it's not good
> to
> strip punctuation.  (I recall a Norwegian sentence "Drep han ikke
> vent
> til jeg kommer." which translates into "Kill him not|don't wait till
> I
> arrive." where "ikke" can mean both "not" and "don't".  Depending on
> where you put the required comma, the outcome is fatal for the poor
> guy.  I'm sure you have similar examples in English.)
> 
> But, we need a reliable way to detect the end of the license text. 
> How
> about having an "End of license." phrase?  That would prevent anyone
> from adding exceptions below the official license.
> 
> Further, we may probably want to apply difference restrictions on
> different directories (and file types).  I guess 'rtl' is the most
> important to restrict.
> 
> > We'll look at the technical solution you mention below.
> >
> I made some tests.  We can do it if we want.

Your plan sounds excellent! Have you uploaded the tests to SVN? I'd
like to see if I can help improve them.

Thanks,
Mark