Reload a map when it changes on disk about tiled HOT 8 CLOSED

Right, it should probably only ask when you have unsaved modifications in Tiled.

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Many editors (Kate, Gimp, Inkscape) have a reload/revert action that re-reads the file from disk, which may be better than either spamming a yes/no dialog or reloading quietly. F5 is a common shortcut for this.
Kate has an indicator showing that the file was changed/deleted on disk.

Unfortunately, in most editors a reload destroys undo history. Being able to undo the reload would be awesome; “Execute Command” could then easily be used for custom automapping-like scripts.

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I have a custom python script that I use for automapping, and it is annoying having to manually close and reopen the file each time. This would definitely be helpful.

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I'd like to add a +1 to this as I've recently started using a custom command and need to reload the map to avoid issues. My game requires unique IDs per object to properly track state. Rather than making the IDs by hand, I mostly just randomly generate them from GUIDs in a separate app that can be run as an external command (so a simple F5 generates all the IDs I need and ensure's they are all unique). However if the map doesn't reload in the editor, saving again will remove the IDs again. This causes a workflow issue when level editing.

A potentially separate answer to what's proposed here is a slightly less ambitious fix which is to add functionality to the command system such that the command executed can return an exit code that indicates if the file needs to be reloaded. This would benefit scripts or programs that modify the files without having to do any major work to the infrastructure of Tiled. Another option would be to just add a checkbox to the commands panel to always reload after executing a command.

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any news about this ?
I use external tool to add some custom game properties to the map and need that Tiled remain up to date with modifications from external tool.

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Any idea on complexity of this feature @bjorn ? Would give it a crack myself but not great with C++ and having a quick look, seems it would be tricky keeping undo in sync.

Happy to throw a bit at bounty source to start things off if you think it's feasible to do / worth doing. Maybe worth working out how much it would cost to add so at least there is a target if others also want this feature?

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I think the best way to deal with external changes that have been detected is similiar to how Qt Creator detects when you have changed your source code from an external editor (or git for example) - show a popup to the user asking if he would like to update to what is currently in the file. Does anyone else agree?

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Reload and file-watching are finally there! Please give it some good testing.

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