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I have a working compilation error matcher, that contains the path to a file. The compilation buffer correctly adds a hyperlink to that file and I can open it in emacs. However, the file in question is an html report which I would like to open using an external browser. I already know how to modify the file element, so I could change it to give emacs a hint to open it with system tools. I think of something similar to a trump prefix for find-file, but in this case for overlay hyperlinks. Does such a prefix exist?

As a bonus question: I would like to not use the system default browser but a specific one, say firefox. How could that be done?

Note: I think as a last resort to try something like openwith, but this would smell more like a hack, because in general I want to open end edit html file in emacs.

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You could redefine next-error-function in the compilation buffer and make it do something else, while using compilation-next-error-function as a fall-back. It's probably going to be some work.

  • In that case I would rather not let compilation-mode search for those errors and go for a (add-to-list 'compilation-finish-functions #'my-highlight-and-make-external-tool-buttons) or a hook like compilation-filter-hook. In my use case the files with external link are all at the buffer bottom, so I do not need compilation-next-error. I have to explore that in more detail, maybe someone can give me a hint which hook could be appropriate for this? Anyway, for completenes: how could I weave my findings into a compilation-next-error in custom filter functions? – theldoria Jul 6 '17 at 5:29

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