Re: Handling custom link types for html export in v 9.0 - Replacement for deprecated `org-add-link-type`?

[John Kitchin <jkitchin@andrew.cmu.edu>]

You can find a many examples of the new link syntax here:
http://kitchingroup.cheme.cmu.edu/blog/2016/11/04/New-link-features-in-org-9/

You will probably be able to reuse much of your old code  and this:

(org-link-set-parameters
   "img"
   :follow (your-old-follow-code)
   :export (your-old-export-code))

Milan Zimmermann writes:

> Hi:
>
> I have a question about how to define custom link type, which before
> 9.0 used the (9.0) deprecated  `org-add-link-type`.
>
> 1. Let me first provide the context:
>
> There is often a need to generate, for org links export/publish to
> Html, elements where img src URL starts with a slash, like this
>
> <img src="/images/a.jpg" >
>
> The only way that was possible before v9, for this to be exported from
> a link such as
>
> [[/images/a.jgp]]
>
> was to use a method described in
>
> http://stackoverflow.com/questions/14684263/how-to-org-mode-image-absolute-path-of-export-html
>
> - Basically, the solution described there is
>
> a) define a custom link type such as "img"
> b) in org,  use [[img:images/a.jpg]]
> c) define two functions handling the img link in org and on
> export/publish, and call (org-add-link-type "img"
> 'org-custom-link-img-follow 'org-custom-link-img-export)
>
> 2. The problem and question
>
> In org 9.0, we get `org-add-link-type ... This function is obsolete
> since Org 9.0 use `org-link-set-parameters' instead.
>
> My problem is I have no idea how to, in a practical sense, use
> `org-link-set-parameters` to define a custom link type "img" and
> handle it's image handling in both org buffer and Html publish.
>
> My question is, are there any links and examples how one would do the
> above in 9.0?
>
> Thanks
> Milan


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Professor John Kitchin
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