Merlin on Emacs (GUI)没有得到沙丘提供的merlin配置

Question

首先，请知道我是一个在奥卡姆沙丘和项目管理的初学者。尽管如此，我已经安装了沙丘，并创建了一个新的沙丘项目，该项目处理凸轮库、图形等。项目编译和执行在我通常做的工作中工作得很好：

• opam exec沙丘建造
• opam exec沙丘主管./myexecutable.exe

然而，无法在emacs中使用Tuareg模式，因为后者似乎没有很好地找到/理解沙丘项目配置文件，该文件代表沙丘v2.8之前的".merlin“(根据doc：https://dune.readthedocs.io/en/latest/usage.html?highlight=merlin)。当我尝试将当前的启动到Tuareg中时，这个就意味着大量的“未绑定模块”错误。

我尝试手动添加包

• Merlin >选择软件包

但是Merlin似乎并不关心这一点，即使它出现在merlin配置文件中。

某些假设

每次我想从沙丘访问外部“Opam安装的”库/包时，我都需要从Opam启动沙丘，以访问它们，而不是在shell中启动一个简单的“沙丘”命令。我觉得"Opam环境“是无法从”外壳环境“访问的。这在我的问题中起了作用吗？

您可以在下面找到一些相关信息，这些信息可能有助于理解我的问题：

• 不手动添加包的情况下检查configuration

加载的自定义文件: /home/erwan/Bureau/Nextcloud/GIT/Projet_integrateur_L3OPTIM/dev/importimg/dune-project自定义缓冲区设置：-packages: none -flags：“-extensions: none Custom安装程序：((env”PATH=/home/erwan/..opam/ .merlin /bin“)”(命令)。“/home/erwan/..opam/default/bin/ocamlmerlin”)

• 沙丘文件

(可执行文件(名称importimg) (库camlimages.core camlimages.png图形camlimages.graphics))

• 代码片段+从REPL获得的典型错误
• 我的项目的树结构(由沙丘生成)

.
├── _build
│   ├── default
│   │   ├── dune
│   │   ├── dune-project
│   │   ├── image.png
│   │   ├── importimg.exe
│   │   └── importimg.ml
│   └── log
├── dune
├── dune-project
├── image.png
├── #importimg.ml#
└── importimg.ml

• .emacs content

;; Basic .emacs with a good set of defaults, to be used as template for usage
;; with OCaml and OPAM
;;
;; Author: Louis Gesbert <louis.gesbert@ocamlpro.com>
;; Released under CC0

;; Generic, recommended configuration options

(custom-set-variables
 ;; custom-set-variables was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 '(ac-use-fuzzy nil)
 '(backup-directory-alist (quote (("." . "~/.local/share/emacs/backups"))))
 '(compilation-context-lines 2)
 '(compilation-error-screen-columns nil)
 '(compilation-scroll-output t)
 '(compilation-search-path (quote (nil "src")))
 '(custom-enabled-themes (quote (tango-dark)))
 '(electric-indent-mode nil)
 '(indent-tabs-mode nil)
 '(line-move-visual t)
 '(next-error-highlight t)
 '(next-error-highlight-no-select t)
 '(next-line-add-newlines nil)
 '(require-final-newline t)
 '(sentence-end-double-space nil)
 '(show-paren-mode t)
 '(show-trailing-whitespace t)
 '(visible-bell t))

;; ANSI color in compilation buffer
(require 'ansi-color)
(defun colorize-compilation-buffer ()
  (toggle-read-only)
  (ansi-color-apply-on-region (point-min) (point-max))
  (toggle-read-only))
(add-hook 'compilation-filter-hook 'colorize-compilation-buffer)

;; Some key bindings

(global-set-key [f3] 'next-match)
(defun prev-match () (interactive nil) (next-match -1))
(global-set-key [(shift f3)] 'prev-match)
(global-set-key [backtab] 'auto-complete)
;; OCaml configuration
;;  - better error and backtrace matching

(defun set-ocaml-error-regexp ()
  (set
   'compilation-error-regexp-alist
   (list '("[Ff]ile \\(\"\\(.*?\\)\", line \\(-?[0-9]+\\)\\(, characters \\(-?[0-9]+\\)-\\([0-9]+\\)\\)?\\)\\(:\n\\(\\(Warning .*?\\)\\|\\(Error\\)\\):\\)?"
    2 3 (5 . 6) (9 . 11) 1 (8 compilation-message-face)))))

(add-hook 'tuareg-mode-hook 'set-ocaml-error-regexp)
(add-hook 'caml-mode-hook 'set-ocaml-error-regexp)
;; ## added by OPAM user-setup for emacs / base ## 56ab50dc8996d2bb95e7856a6eddb17b ## you can edit, but keep this line
(require 'opam-user-setup "~/.emacs.d/opam-user-setup.el")
;; ## end of OPAM user-setup addition for emacs / base ## keep this line
(custom-set-faces
 ;; custom-set-faces was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 )

• 版本

梅林: 3.7.0

沙丘: 2.1.3

Emacs: 2020-03-26的GNU 26.3 (build 2，x86_64-pc-linux-gnu，GTK+版本3.24.14)，由Debian修改

Opam: 2.0.5

Ocaml: 4.08.1

提前感谢

Answer 1

我终于解决了我的问题，建立一个"opam开关“到我的工作目录(WD)。一旦进入WD，就必须启动以下命令：

opam switch create . ocaml-base-compiler

然后，我重新安装了所有所需的软件包。Utop意外地取代了emacs ^^‘中的ocaml REPL (但我不太介意.)。现在，沙丘和梅林“看”这些包裹。

尽管如此，本教程帮助我为您提供了这个答案；dune.html

(请注意，opam、emacs和utop已经安装在我的工作环境中)。