Nice and useful idea.

thanks

On 5 March 2017 at 09:46, Kaushal Modi <kaushal.modi@gmail.com> wrote:

> I have this in my config which works very well. I use this just for org :)
> I build org from its master branch, so I do not want the dependency check
> to auto-install older versions from Elpa.
>
> ;; http://emacs.stackexchange.com/a/26513/115
> (defun modi/package-dependency-check-ignore (orig-ret)
>   "Remove the `black listed packages' from ORIG-RET.
> Packages listed in the let-bound `pkg-black-list' will not be
> auto-installed
> even if they are found as dependencies.
> It is known that this advice is not effective when installed packages
> asynchronously using `paradox'. Below is effective on synchronous
> package installations."
>   (let ((pkg-black-list '(org))
>         new-ret
>         pkg-name)
>     (dolist (pkg-struct orig-ret)
>       (setq pkg-name (package-desc-name pkg-struct))
>       (if (member pkg-name pkg-black-list)
>           (message (concat "Package `%s' will not be installed. "
>                            "See `modi/package-dependency-check-ignore'.")
>                    pkg-name)
>         ;; (message "Package to be installed: %s" pkg-name)
>         (push pkg-struct new-ret)))
>     new-ret))
> (advice-add 'package-compute-transaction :filter-return
> #'modi/package-dependency-check-ignore)
>
> https://github.com/kaushalmodi/.emacs.d/blob/master/setup-packages.el
>
> On Thu, Mar 2, 2017 at 7:41 PM Tim Cross <theophilusx@gmail.com> wrote:
>
>> Is there a way to specify alternative dependencies in a package?
>>
>> Situation: installing a package is resulting in an additional package
>> being installed even though the dependencies for the package have already
>> been satisfied by another package. This results in two packages being
>> installed which provide overlapping functionality.
>>
>> Example. I have installed org-plus-contrib. I then install elfeed-org,
>> which has a dependency on org. This results in the org package being
>> installed, but org is already installed as part of the org-plus-contrib
>> package.
>>
>> I'm trying to work out if this is a problem with how dependencies are
>> defined in the elfeed-org package or is it a problem with how
>> org-plus-conrib is specifying what dependency it satisfies? Need to know in
>> order to determine where this issue needs to be logged.
>>
> --
>
> Kaushal Modi
>



-- 
regards,

Tim

--
Tim Cross