os.run 为什么只能在 target 域中使用

[osenberg-x]

你在什么场景下需要该功能？

想要在构建之前使用 os.run 执行一些命令，比如在构建之前 git clone 一个源码子项目
os.run("git clone -b url ${projectdir}/src/name")

描述可能的解决方案

可以在全局使用 os.run

描述你认为的候选方案

No response

其他信息

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

---

Title: os.run can only be used in the target domain

In what scenario do you need this function?

Want to use os.run to execute some commands before building, such as git clone a source code subproject before building
os.run("git clone -b url ${projectdir}/src/name")

describe possible solutions

Can be used globally with os.run

Describe what you think is a candidate

No response

other information

Why

[waruqi]

先看下 描述域和脚本域的区别。。https://xmake.io/#/zh-cn/guide/syntax_description

os.run 只能在脚本域调用，全局定义 before_run 里面执行就行了。或者定义个 phony target 。其他 targets 都依赖它

[osenberg-x]

先看下 描述域和脚本域的区别。。https://xmake.io/#/zh-cn/guide/syntax_description

os.run 只能在脚本域调用，全局定义 before_run 里面执行就行了。或者定义个 phony target 。其他 targets 都依赖它

@waruqi 好的，明白了，但是还有一个疑问，文档里说在描述域里面一般不建议执行耗时高的操作，但是 os.run 应该很有可能做出耗时的操作啊?

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

---

First look at the difference between the description field and the script field. . https://xmake.io/#/zh-cn/guide/syntax_description

os.run can only be called in the script domain, and it can be executed in the global definition before_run. Or define a phony target. All other targets depend on it

@waruqi Okay, I understand, but there is still a question. The document says that it is generally not recommended to perform time-consuming operations in the description field, but os.run should be likely to perform time-consuming operations?

[waruqi]

先看下 描述域和脚本域的区别。。https://xmake.io/#/zh-cn/guide/syntax_description
os.run 只能在脚本域调用，全局定义 before_run 里面执行就行了。或者定义个 phony target 。其他 targets 都依赖它

@waruqi 好的，明白了，但是还有一个疑问，文档里说在描述域里面一般不建议执行耗时高的操作，但是 os.run 应该很有可能做出耗时的操作啊?

所以 os.run 不是在描述域禁用的么，原本就不能用。感觉你还是没看明白什么是描述域。

[osenberg-x]

嗷，我描述的不够清楚，比如说在这个情况下
target("test")
on_build(function (target)
os.run("git clone -b master url $(projectdir)/src/name")
end)

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

---

First look at the difference between the description field and the script field. . https://xmake.io/#/zh-cn/guide/syntax_description
os.run can only be called in the script domain, and it can be executed in the global definition before_run. Or define a phony target. All other targets depend on it

@waruqi Ok, I understand, but there is still a question. The document says that it is generally not recommended to perform time-consuming operations in the description field, but os.run should be likely to perform time-consuming operations?

So isn't os.run disabled in the description domain? It can't be used in the first place.