[NTG-context] hash for buffer contents

[Max Chernoff]

Hi Pablo,

> Is there any way to get "utilities.sha2.hash512" with the contents of
> the "abc" buffer?

You can use "buffers.getcontent" or "buffers.raw":

   \startbuffer[test]
       One
       Two
       Three
   \stopbuffer[test]
   
   \starttext
   \startluacode
       require("util-sha")
   
       local content = buffers.getcontent("test")
       -- local content = buffers.raw("test") -- same result
       local sha512 = utilities.sha2.hash512(content)
       context(sha512)
   \stopluacode
   \stoptext

Depending on what you're trying to do, the "filter" module may be
helpful here.

-- Max