Patrick Shanahan wrote:

Hello Patrick,

[..duplicate and export versioning..]
> 
> Not completely following your logic but I frequently crop images
> differently using "duplicate" and get:
> 
> 140927_101652_dsf_3691_dt.jpg
> 140927_101652_dsf_3691_dt_01.jpg
> 140927_101652_dsf_3691.nef
> 140927_101652_dsf_3691.nef.xmp
> 140927_101652_dsf_3691_01.nef.xmp
> 
> the jpgs exported are related by filename to the xmp files and to the
> original nef.

first of all: back your existing output while playing with dup/exp

you selected all in lighttable and 
exported in a clean destination without overwrite.
this is the only way to get pseude-synchron filenames.


try another full export (unchecked overwrite) into existing destination
what is your output? _02 _03

try select one clone and export (unchecked overwrite) into existing destination
what is your output? _04

make a new clone and export only this picture ... _05

now select all and check overwrite. expected:update all existing jpeg
what output file(s)?  ..the basic version is written 3 times. 


_03 doesnt look good, you want more exposure. change. export. Filename?
if you look in jpg with exiftool for Derived.. you see the nef. NOT the xmp for 
the recipe.
scripting? no. 


into empty desination:
export single picture one after the other starting from last clone back to 
orig. 
output reversed (look at he content) 



thus: atm it is not advisable to use duplicate.
 

proposal:
implement *different* counter naming convention for dup and exp.
make any tag in jpg pointing to the corresponding recipe (xmp) file.

dup-cnt is stable, existing dup-xmps should work, always counting up. 
_XX.nef.xmp XX=01..999. no change 
exp-cnt overwrite protection by aa..zz like the default in split from coreutils?
export should use the xmp basename as FILE_NAME, not the nef.
 
darktable-cli nef xmp jpg  .. uses any xmp to produce jpg from nef. no change 
needed.

automatism: darktable-cli nef jpg   ...searches for the xmp with same basename. 
nef->xmp 
wish:       darktable-cli xmp jpg   ...searches for the nef referenced in xmp.  
_XYxmp->nef






have a nice weekend!
greets
Wolfgang




> 
> fwiw: the functionality is as "I expect" it to be.
> 
> It really appears to me that you have not properly configured the
> export feature.  Or, I completely do not understand.
> 


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