首先，请知道我是 Ocaml 的 Dune 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，它处理 camlimages 库、图形等。当我照常进行时，项目编译和执行效果很好：
- opam exec 沙丘构建
- opam exec 沙丘 exec ./myexecutable.exe
但是，我不能在 emacs 中使用 Tuareg 模式，因为后者似乎无法很好地找到/理解 dune-project 配置文件代表沙丘 v2.8 之前的前者“.merlin”（根据文档：https： //dune.readthedocs.io/en/latest/usage.html?highlight=merlin )。当我尝试将当前的 .ml 启动到 Tuareg repl 时，这意味着很多“未绑定模块”错误。
我试图手动添加包
- Merlin > 选择套餐
但是 Merlin 似乎并不关心这个，即使它出现在 merlin 配置文件中。
一些假设：
每次我想从 dune 访问外部“安装 opam”的库/包时，我需要从 Opam 启动 Dune 以便访问它们，而不是在 shell 中启动一个简单的“Dune”命令。我觉得“shell环境”无法访问“Opam环境”。这对我的问题有影响吗？
您可以在下面找到一些相关信息，这可能有助于理解我的问题：
- Merlin > 检查配置而不手动添加包
加载的 .merlin 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 自定义 merlin 设置：((env " PATH=/home/erwan/.opam/default/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））
- 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 内容
;; 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 Emacs 26.3（build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.14），由 Debian 修改
欧帕姆：2.0.5
奥卡姆：4.08.1
提前致谢