使用 dune 将生成的可执行文件复制到我的根目录中

问题描述

假设我有一个具有以下结构的简单项目:

.├── 沙丘项目└── src└── 斌├── 沙丘└── main.ml

沙丘项目

(lang dune 2.7)(命名我的项目)(包裹(命名我的项目)(剧情简介我的项目")(描述基本项目"))

沙丘

(可执行(姓名主要)(public_name myproject))

当使用 dune build 编译时，我有一个新目录 _build，其结构如下:

_build├── 默认│ ├── 沙丘项目│ ├── META.myproject│ ├── myproject.dune-package│ ├── myproject.install│ └── src│ └── 斌│ ├──沙丘│ ├── main.exe│ └── main.ml├── 安装│ └── 默认│ ├── bin│ │ └── myproject ->../../../default/src/bin/main.exe│ └── lib│ └── 我的项目│ ├── dune-package ->../../../../default/myproject.dune-package│ └── META ->../../../../default/META.myproject└── 日志

所以沙丘能够创建从 main.exe 到 myproject 的符号链接，但我实际上希望 myproject 在 中. 而不是在 _build/install/default/bin

我尝试了三件事:

• 在我的 dune 文件中添加规则 (promote (into ../../)).它实际上复制源目录中的 main.exe 而不是 myproject 并且 dune clean 不会删除 main.exe> 在根目录中

• 在我的 dune 文件中添加以下规则:

  (规则(目标我的项目)(deps ../../myproject)(动作(复制 %{target} %{deps})))

  这给了我以下错误:

  ❯ 沙丘建造文件src/bin/dune"，第 6 行，字符 0-88:6 |(规则7 |(目标我的项目)8 |(deps ../../myproject)9 |(动作(复制 %{target} %{deps}))10 |)错误:未找到适用于 myproject 的规则错误:以下文件之间的依赖循环:_build/default/src/bin/myproject完成:0/0(工作:0)%

• 在我的 dune 文件中添加以下规则:

  (规则(目标 main.exe)(deps ../../myproject)(动作(复制 %{target} %{deps})))

  这给了我以下错误:

  ❯ 沙丘建造错误:为 _build/default/src/bin/main.exe 生成了多个规则:- src/bin/沙丘:6- src/bin/沙丘:2完成:0/0(工作:0)%

老实说，我不知道我还能做什么.我阅读了手册，但找不到解决方案.我不介意我是否可以只输入 dune run 但由于 dune 允许构建多个可执行文件，我知道这不是一个选项.我希望能够编写 dune run myproject，因为我使用的是可执行文件的公共名称，但 dune 找不到它.所以我只想在我的根目录中有 myproject 这样我就可以输入 ./myproject 并且很高兴.

解决方案

你知道 dune exec 吗?这就是你所说的 dune run 我相信.

从你的项目根目录，你可以执行dune exec ./bin/main.exe.

Let's say I have a simple project with the following structure:

.
├── dune-project
└── src
└── bin
    ├── dune
    └── main.ml

dune-project

(lang dune 2.7)
(name myproject)

(package
 (name myproject)
 (synopsis "myproject")
 (description "Basic project")
)

dune

(executable
 (name main)
 (public_name myproject)
)

When compiling with dune build I have a new directory _build with the following structure:

_build
├── default
│   ├── dune-project
│   ├── META.myproject
│   ├── myproject.dune-package
│   ├── myproject.install
│   └── src
│       └── bin
│           ├── dune
│           ├── main.exe
│           └── main.ml
├── install
│   └── default
│       ├── bin
│       │   └── myproject -> ../../../default/src/bin/main.exe
│       └── lib
│           └── myproject
│               ├── dune-package -> ../../../../default/myproject.dune-package
│               └── META -> ../../../../default/META.myproject
└── log

So dune is able to create a symlink from main.exe to myproject but I actually want myproject to be in . and not in _build/install/default/bin

I tried three things:

• Add the rule (promote (into ../../)) in my dune file. It actually copies main.exe and not myproject in the source directory and dune clean doesn't delete main.exe in the root dir

• Add the following rule in my dune file:

  (rule
   (target myproject)
   (deps   ../../myproject)
   (action (copy %{target} %{deps}))
  )
  

  which gives me the following error:

  ❯ dune build
  File "src/bin/dune", line 6, characters 0-88:
   6 | (rule
   7 |  (target myproject)
   8 |  (deps   ../../myproject)
   9 |  (action (copy %{target} %{deps}))
  10 | )
  Error: No rule found for myproject
  Error: Dependency cycle between the following files:
     _build/default/src/bin/myproject
  Done: 0/0 (jobs: 0)%          
  

• Add the following rule in my dune file:

  (rule
   (target main.exe)
   (deps   ../../myproject)
   (action (copy %{target} %{deps}))
  )
  

  which gives me the following error:

  ❯ dune build
  Error: Multiple rules generated for _build/default/src/bin/main.exe:
  - src/bin/dune:6
  - src/bin/dune:2
  Done: 0/0 (jobs: 0)%      
  

And honestly I don't know what else I can do. I read the manual and can't find a solution. I wouldn't mind if I could just type dune run but since dune allows to build multiple executables, I understand it's not an option. I'd like to be able to write dune run myproject since I'm using the public name of my executables but dune can't find it. So I just want to have myproject in my root directory so I can just type ./myproject and be happy.

解决方案

Do you know about dune exec? It is what you call dune run I believe.

From the root of your project, you can do dune exec ./bin/main.exe.

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