I played around for some time on this yesterday. I did get that strange loading everything in terminals effect and do not know why. More time spent today in a more methodical manner.
First of all, the monster that is the samj portable Gimp for Windows. Much the same as a regular Gimp except it includes the equivalent of the Gimp user profile, a folder Preferences. I only mention this because same as a regular Gimp it create & writes settings somethingrc files there.
One of those files is gimprc which holds the paths you write when adding folders using Edit -> Preferences -> Folders
Some grouped screenshots: https://i.imgur.com/ZIq8x0M.jpg
When the portable Gimp is launched the 'launcher' (1) queries Drive letters etc and sets the Gimp variables accordingly.
You can still add additional paths to folders, I am using a gimp-extras/plugins (/fonts / scripts) on the USB drive, obviously these take the Drive letter that is assigned (2) . If you inspect the gimprc file that is created then you see the extra path (3)
More grouped screenshots: https://i.imgur.com/WyvucIa.jpg
You can edit gimprc to include "possible" drive letters that might occur when using a different computer (4) Use a decent text editor such as notepad++
Running Gimp portable in another machine those paths are scanned, false ones are ignored but the folder on the USB is recognized. (5) A quick check for a plugin, a little one I use which was added to the gimp-extras/plugins folder. (6)
Is it worth the effort ? IMHO no. The Preferences folder structure included in the samj portable is the best place to add your resources.
First of all, the monster that is the samj portable Gimp for Windows. Much the same as a regular Gimp except it includes the equivalent of the Gimp user profile, a folder Preferences. I only mention this because same as a regular Gimp it create & writes settings somethingrc files there.
One of those files is gimprc which holds the paths you write when adding folders using Edit -> Preferences -> Folders
Some grouped screenshots: https://i.imgur.com/ZIq8x0M.jpg
When the portable Gimp is launched the 'launcher' (1) queries Drive letters etc and sets the Gimp variables accordingly.
You can still add additional paths to folders, I am using a gimp-extras/plugins (/fonts / scripts) on the USB drive, obviously these take the Drive letter that is assigned (2) . If you inspect the gimprc file that is created then you see the extra path (3)
More grouped screenshots: https://i.imgur.com/WyvucIa.jpg
You can edit gimprc to include "possible" drive letters that might occur when using a different computer (4) Use a decent text editor such as notepad++
Running Gimp portable in another machine those paths are scanned, false ones are ignored but the folder on the USB is recognized. (5) A quick check for a plugin, a little one I use which was added to the gimp-extras/plugins folder. (6)
Is it worth the effort ? IMHO no. The Preferences folder structure included in the samj portable is the best place to add your resources.