merlin 1.7 install fails to install vim plugin

[nilsbecker]

i do opam reinstall merlin. it reports

rm -rf /Users/<user>/.opam/4.01.0/share/ocamlmerlin
  make
  make merlin.install

and further reports success. but after installation, ~/.opam/4.01.0/share/merlin/ is an empty directory, and no ocamlmerlin directory exists. looking at the Makefile and Makefile.config (but not understanding much) there seems to be a confusion between /share/ocamlmerlin and /share/merlin. also in the documentation sometimes one sometimes the other is mentioned. os x 10.9.

[let-def]

The installation should be handled by opam. What is your version of opam?

[let-def]

More details.

The normal installation process is handled by the install rule of the Makefile. Since the first version of merlin, it used share/ocamlmerlin as directory to store various files.

Opam now provides a declarative system for installation: make rule produces files, and the merlin.install file list all files to install.
opam takes care of putting those files in the appropriate directory (which should be share/merlin/vim for vim mode).
The first command rm -rf /Users/<user>/.opam/4.01.0/share/ocamlmerlin is here to remove leftovers from previous installations.
It's worth checking the content of merlin.install.

[nilsbecker]

opam version is 1.1.1. the contents of merlin.install are

bin: [
  "ocamlmerlin.native" {"ocamlmerlin"}
  "omake-merlin"
  "jenga-merlin"
]

share: [
  "emacs/merlin.el" {"../emacs/site-lisp/merlin.el"}
  "?emacs/merlin.elc" {"../emacs/site-lisp/merlin.elc"}
]

about the ocamlmerlin directory: yes, this was used and worked previously on my system. but in the post-install message i get from opam, it says

Quick setup for VIM
-------------------
Append this to your .vimrc to add merlin to vim's runtime-path:
  let g:opamshare = substitute(system('opam config var share'),'\n$','','''')
  execute "set rtp+=" . g:opamshare . "/merlin/vim"

and opam config var share gives /Users/<user>/.opam/4.01.0/share

[nilsbecker]

wait, has this changed? in commit 7c44a25 is now says ocamlmerlin in the message?! maybe a stale version is still on the opam repository?

[let-def]

This has been changed after this commit, when switching everything to opam-managed install.
The bug comes from relying on the GNU implementation of find, whereas OSX provides a BSD implementation. I thought this bug was already fixed, but I made a mistake when committing.

[let-def]

I'll push the update on opam master server. In the meantime, could you try

opam pin merlin https://github.com/the-lambda-church/merlin
opam reinstall merlin

The vim files should be installed now.

[let-def]

(and you will want to do an opam pin merlin none to get back to the opam repository version later)

[nilsbecker]

ok, thanks. i did that and indeed it installs the files under share/merlin/vim. ocamlmerlin no longer exists. after changing my .vimrc according to the post-install message, it's working again. i think in the docs there were some places that still referred to the ocamlmerlin directory though. for example the README contradicts the post-install message.

[let-def]

Yep, thanks, we should update that.

The problem is that manual installation is still allowed, and manual installation uses "ocamlmerlin" (I choose that name because in a system-wide installation there might be conflicts with merlin name).

[nilsbecker]

On 22/08/14 11:14, def-lkb wrote:

Yep, thanks, we should update that.

The problem is that manual installation is still allowed, and manual installation uses "ocamlmerlin" (I choose that name because in a system-wide installation there might be conflicts with merlin name).

---

Reply to this email directly or view it on GitHub:
#245 (comment)

what about ocaml/merlin for the system wide install? or is directory
nesting not desirable?

[samoht]

You can use opam-installer merlin.install for manual installation.

[let-def]

@Samoth: yes but the Makefile install rule is used when outside of opam, so we can't assume that opam-installer is available, and using share/ocamlmerlin instead of share/merlin is a deliberate choice