I have created a plug-in for darktable that provides easy access to HDRMerge capabilities right from the lighttable view. I did all my testing in Windows 10, but in theory it should be cross-platform compatible. Let me know if you run in to issues on Linux or MacOS though.
The plugin supports:
Single or Batch Mode
Ability to control all HDRMerge options (except masks):
Bits [16, 24, 32]
Preview Size [Half, Full, None]
Gap [1 - 60 seconds]
If not running in batch mode it will auto-import the newly generated DNG and apply the additional options upon import:
Copy Tag [copies tags from first file in the selection]
Additional tags [these are added regardless of your selection on “Copy Tags”]
All of these controls (aside from the two batch operators) can have their default values set via the “settings > lua options” dialog box. This way the module can load up with your most used settings by default.
I hope others find this useful! With the high FPS of cameras these days the vast majority of my bracketed shots are handheld, so the alignment provided by HDRMerge is very handy compared to dt’s built in HDR tool.