Can't install Plantuml-mode -- MELPA Package list Incomplete (Mac)

Question

I'm trying to install plantuml-mode based on the instructions here:

I'm told to try the following:

M-x package-install<RET>
plantuml-mode<RET>

But the package isn't found:

Contacting host: elpa.gnu.org:80
Failed to download ‘gnu’ archive.

However, it is listed here on MELPA:

I don't have much experience installing things in Emacs. Is there some fool-proof way to get this installed on my mac, possibly with a 'recipe'?

I do have plantuml installed.

The error you are getting has nothing to do with MELPA or plantuml-mode: it has to do with ELPA and the gnu archive. Have you tried eliminating that from package-archives? — NickD, Commented Jan 26, 2018 at 21:08

בנימן הגלילי · Accepted Answer · 2017-08-15 11:35:42Z

0

Sometimes the secure https connection doesn't work. Restart emacs and launch with

emacs --insecure

answered Aug 15, 2017 at 11:35

8679 silver badges16 bronze badges

1

I doubt that's a good idea. Would you do that in your browser?
– NickD
Commented Jan 26, 2018 at 21:08
To make https connection always work, add this to your config.el file: ``` '(gnutls-algorithm-priority "NORMAL:-VERS-TLS1.3")```
– Ian
Commented Dec 19, 2019 at 15:31

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palash kulshreshtha · Accepted Answer · 2017-10-28 14:08:09Z

Just in case anyone faces the same problem, my problem was resolved after

I found in Messages that emacs melpa was
- trying to download from http://melpa.milkbox.net/packages/plantuml-mode-20161225.1142.el where as
- the the el file I found on melpa site was http://melpa.milkbox.net/packages/plantuml-mode-20170819.1033.el .
Hence I refreshed the contents of packages by running M-x package-refresh-contents .
then download the jar file from plantuml site. voila problem solved

2 Answers 2