[NTG-context] Upgrade to 2015.11.19 breaks OTF reader?

[talazem at fastmail.fm]

In case this helps anyone else:

In my case, the LuaTeX error resulted from what appears to be a corrupt font cache. I was getting the error: 

> !LuaTeX error: cannot find OpenType font file for reading ()
> ==> Fatal error occurred, no output PDF file produced!
 
The solution was to clean the LuaTeX font cache in my ConTeXt standalone directory. Mine was in:
` ~/context/tex/texmf-cache/luatex-cache/context/<...>/fonts/otf/ `

(The <…> represents a long string of numbers.)

I deleted the .tma and .tmc files in that OTF directory. Upon running ConTeXt again, everything worked fine. [The source of this discovery was http://tex.stackexchange.com/questions/65038/luatex-cannot-find-existing-font <http://tex.stackexchange.com/questions/65038/luatex-cannot-find-existing-font> ]

Talal

> On 10 Dec 2015, at 23:10, talazem at fastmail.fm wrote:
> 
> I am having the same problem as the OP. I have manually edited the font-otr.lua file as per the patch below, and I deleted the font cache. But all to no avail. I still get:
> 
> !LuaTeX error: cannot find OpenType font file for reading ()
>  ==> Fatal error occurred, no output PDF file produced!
> 
> Is there a solution to this?
> 
> Many thanks,
> Talal
> 
>> On 8 Dec 2015, at 00:22, Philipp Gesang <phg at phi-gamma.net <mailto:phg at phi-gamma.net>> wrote:
>> 
>> ···<date: 2015-12-06, Sunday>···<from: Hans Hagen>···
>> 
>>> On 12/6/2015 10:14 PM, Philipp Gesang wrote:
>>>> ···<date: 2015-12-03, Thursday>···<from: Thangalin>···
>>>> 
>>>>> The problem persisted with Courier New, not only Source Sans Pro (SSP).
>>>>> 
>>>>> The font file for Source Sans Pro came directly from the Google's font service.
>>>>> 
>>>>> The SSP (on my machine) works fine in Inkscape.
>>>>> 
>>>>> The exact same font was also working before the ConTeXt upgrade.
>>>> 
>>>> Confirmed, it appears to work if you revert to the old loader in
>>>> font-lib.mkvi.
>>> 
>>> i need a better example of what fails then as it works here
>> 
>> 
>> The problem seems to be the “filename” field being written to the
>> cache from the wrong source. Between the old and the new
>> fontloader, you get the following picture in the “resources”
>> record:
>> 
>>    +  ["filename"]="Everson_Mono_Bold.ttf",
>>    -  ["filename"]="/tmp/here-be-fonts/Everson_Mono_Bold.ttf",
>> 
>> The attached patch fixes it for me.
>> 
>> Philipp
>> 
>> <font-otr.lua-fix-resources.filename.patch>___________________________________________________________________________________
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>> 
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> 
> ___________________________________________________________________________________
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> 
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