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I want to install https://github.com/syohex/emacs-helm-gtags, and here is the installation instruction:

helm-gtags is available on MELPA and MELPA stable

You can install helm-gtags with the following command.

M-x package-install [RET] helm-gtags [RET]

But after M-x package-install [RET] helm-gtags [RET], I got "no match".

How shall I solve this problem? Thanks.

update:

1) Running M-x package-refresh-contents [RET] will stay at "Contacting host: elpa.gnu.org:80" forever, so doesn't seem to solve the problem. Why doesn't finish running?

2) Even without waiting for "Contacting host: elpa.gnu.org:80" to go away, running package-install on helm-gtags still results in "no match".

3) Do I need to add the repository of helm-gtags somewhere, and what is its repository?

Tim
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2 Answers2

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helm-gtags is not available in elpa repository. You should add melpa repository to your packages archives to install helm-gtags. Add the following code in your emacs init file,

(setq package-archives '(("gnu" . "https://elpa.gnu.org/packages/")
                     ("melpa" . "https://melpa.org/packages/")))

Then press C-x C-s to save and M-x eval-buffer for the changes to apply. Then try to refresh packages and search for helm-gtags package. More information about emacs packages repository can be found in Emacs Wiki.

clozach
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Hariharan
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  • I get certificate warnings when naively copy/pasting this solution. ("The TLS connection to marmalade-repo.org:443 is insecure for the following reason: certificate has expired") The Marmalade project seems to be defunct. https://www.emacswiki.org/emacs/MarmaladeRepo – clozach Jan 17 '19 at 18:36
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M-x package-refresh-contents [RET] M-x package-install [RET] helm-gtags [RET]

Or

M-x package-list-packages [RET] C-s helm-gtags [RET] i x

Steven
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  • You might want to elaborate a bit. Explain what the no match error means and what your answer does that takes care of it. – Drew Jul 08 '16 at 23:28
  • Running -x package-refresh-contents [RET] will stay at "Contacting host: elpa.gnu.org:80" forever, so doesn't seem to solve the problem. Why doesn't finish running? 2) Even without waiting for "Contacting host: elpa.gnu.org:80" to go away, running package-install on helm-gtags still results in "no match". 3) Do I need to add the repository of helm-gtags somewhere, and what is its repository?
    • – Tim Jul 09 '16 at 00:45
  • If refresh doesn't help, one workaround is to exchange the https repository URL for http, as seen in this comment: https://emacs.stackexchange.com/questions/2490/package-install-reports-no-match?rq=1#comment52676_33083 – Graham Aug 14 '17 at 12:44