Cannot run non main package golang. e. Println ("welcometogolang")}解决方法把hello包改成main包packagemainimport This answer covers module structure, importing local packages, arranging packages within a module, whether or not to have multiple modules in single repository, etc. To run an application in Go as an executable program you need an entry point - the place where the program execution begins. Jul 25, 2020 · We therefore cannot offer any estimates as to how well it will perform. The goal of this document is to provide some guidelines that will help answer this question. go, it's highly likely you're either importing other packages, or there are other files in the main package containing functions that are being called from main. Move up to main directory which contains main. Still, a couple of rather complex functions have already accumulated there, and so you decide to create a unit test for package main. Write some simple "Hello, world" code. Call functions of an external module. 使用golang进行开发，刚写了一个demo， 报错 了： Error: Run after build is not possible Main file has non -main package or doesn ’t contain main functio 报错 信息显示如下： 报错 的意思是说，找不到你写的包并没有 main 函数。 本文解析了Go语言中gorun命令的使用限制，重点在于确保代码中的main方法位于packagemain包下。 通过实例代码演示了如何修正并运行带有gin框架的main函数，以避免非main包执行问题。 go run: cannot run non-main package 的错误信息，代码如下： 文章浏览阅读2. Can't tends to be informal, and can not is usually considered a typo. Dec 2, 2011 · Cannot is the only negative form that contains not rather than -n't. Use the Go package discovery tool to find packages you can use in your own code. 第一天学习go语言就出师不利呀，hello world执行就报错！！！ 报错一： package command-line-arguments is not a main package（包命令行参数不是主包）原因：IDE工具在创建文件的时候会自动将package包名写为文… 我是做java开发的，从接触java开始算，已经8年了，为什么会想到学go语言呢？前端时间我一直在学习jvm，java的一些更底层的东西，梳理回顾时，感觉可以通过学习其他开发语言，来提升我对java的理解，站在另一个角度来看java。但是又怕是蜻蜓点水式的学，达不到效果，于是有了接下来的文章，希望能 解决方法：从本地加载或直接下载对应版本的go sdk。 问题2：编译go程序失败？ Error: Run after the build is not possible The 'main' file has the non-main package or does not contain the 'main' function @jub0bs go run path/to/file. Like mockgen for example. you cannot install the net/http package, you cannot install the strconv package. Dec 10, 2018 · Stick with cannot. buildmodeShared(ModeInstall, ModeInstall The ‘main‘ file has the non-main package or does not contain the ‘main‘ function解决办法 原创 最新推荐文章于 2025-04-23 10:39:39 发布 · 5. In this tutorial, you'll get a brief introduction to Go programming. After all, who says that unit tests are restricted to library packages? Ingredient #2: a test file So your main file has grown large but not large enough to move some code out of package main into library packages. The other a main, executable package. go implies whatever file you're passing is the main package, and has a main function. In this section, you'll write code to make calls to the Hello function in the module you just wrote. There is nothing to stop a customer from ordering something different and taking a chance that it will work. Sep 19, 2023 · So here it’s about minimizing ambiguity: can not permits two interpretations, while cannot permits only one. go package. Go projects can include 文章浏览阅读2. g. Go build/install is trying to find main package in your root directory, it is not checking sub-directories (cmd/server) in your case. Prerequisites Some In this tutorial, you'll get a brief introduction to Go programming. For any program that you want to be executable (a program that can be run from the command line), you will need a main() function. One is a plain, importable package. Try running "go build -x" to see what's happening. As per the following example: @AndersBreid note the difference between gomock and mockgen. Aug 20, 2012 · When is it best to write "can't" versus writing "cannot"? Are they interchangeable in every situation? Apr 20, 2021 · The phrase "can not" may mean "cannot" or "can't," but it also may mean "able not to," which is much different than "not able to" as it conveys the ability to not do something rather than the inability to do it. In addition, developers run "go build" on non-main packages all the time without any expectation that a binary is going to be produced-- they just want to see if the code still compiles after a change to the source. People also run builds of non-main packages to gather more info. Continuing the example above, the package list would have to appear before -myflag, but could appear on either side of -v. Ingredient #2: a test file So your main file has grown large but not large enough to move some code out of package main into library packages. . Its purpose is to identify the files belonging to the same package and to specify the default package name for import declarations. The main() function must appear only once, be in the main() package, and receive and return no arguments. docker run go程序 报错 no required module provides package main. Theoretically, since it is a single word, you can say why cannot you without a problem. go文件统统使用 根目录 下的文件夹包括。 注意:必须从 main. Similarly, go get mvdan. Such an entry point is the main() function in the package named main. 2k 阅读 The package clause is not a declaration; the package name does not appear in any scope. Now build the package by moving to mypkg directory and run go build on terminal or command line if you are window user. Aug 20, 2012 · When is it best to write "can't" versus writing "cannot"? Are they interchangeable in every situation? Apr 20, 2021 · The phrase "can not" may mean "cannot" or "can't," but it also may mean "able not to," which is much different than "not able to" as it conveys the ability to not do something rather than the inability to do it. go 的go类型文件，其他包及. Then, proceed to create a simple “Hello World” main. Even though I have GOPATH properly set, I still can't get "go build" or "go run" to find my own packages. Sounds to me like this should error; install shouldn't behave just like get -d when given non-main packages. You cannot install a non-main package. If you wish to modify the hardware configuration after having confirmed that it meets your original specification, regular service charges will apply. In that case, possession of the cake would logically come before usage of the cake: You cannot have your cake and eat it, too. The package name can be an arbitrary identifier, though if you want a package to serve as an entry point for an executable program, it needs to be named “main” and have a function main () with no arguments and no return type. info *string (ポインタ)型であってもそのままでは扱えません。 ポインタが指す値を引数に指定しましょう。 warning flagパッケージを使ってコマンドライン引数を受け取る場合、その変数はポインタ型なので注意しましょう。 関数関連 返却値のない関数の返却値を期待した エラー 返却値を返さない golang,Error: Run After Build Is Not Possible Main File Has Non-Main Package Or Doesn’t Contain Main，程序员大本营，技术文章内容聚合第一站。 Using the flag package involves three steps: First, define variables to capture flag values, then define the flags your Go application will use, and finally, parse the flags provided to the application upon execution. " Those who say "cannot help but" are conflating the two (in much the same some people conflate "irrespective" and "regardless" to create the nonsensical "irregardless"). Main file has non-package，刚接触golang，用gogland运行的时候报这个错:Error:RunafterbuildisnotpossibleMainfilehasnon-packageordoesn'tcontainmainfunctionpackagehelloimport"fmt"funcmain () {fmt. 9k次。使用golang进行开发，刚写了一个demo，报错了：Error: Run after build is not possible Main file has non-main package or doesn’t contain main functio 报错信息显示如下：报错的意思是说，找不到你写的包并没有main函数。其实呢，package不是IDE自动弹出的包，而是跟go文件名一样的。改成main就可以了 This post explains how to resolve the 'go run: cannot run non-main package' error in Go by ensuring the correct package declaration and provides a step-by-step solution. Hence you are getting package not found error. go inside it and go run it. Oct 29, 2010 · Why is “cannot” spelled as one word whereas other similar constructions such as “do not,” “will not,” “shall not,” “may not” and “must not” are spelled as two words (unless they are contracted as “ Dec 2, 2011 · Cannot is the only negative form that contains not rather than -n't. go 文件中启动 run . You'll write code you can execute as an application, and which calls code in the greetings module. " There are two traditional and synonymous idioms, "cannot but [do something]" and "cannot help [doing something]. The irony of the idiom is that one would expect to be able to eat the cake that he or she owned. Along the way, you will: Install Go (if you haven't already). go file and run go install it will create executable file in the name of main directory. I already tried putting the main file in a directory, but when I try to im A common question developers new to Go have is “How do I organize my Go project?”, in terms of the layout of files and folders. Note: This topic is part of a multi-part tutorial that begins with Create a Go module. What am I doing wrong? $ echo $GOROOT /usr/local/go $ echo 814 // Note: If buildmode=shared then only non-main packages 815 // are present in the pkgs list, so all the special case code about 816 // tools above did not apply, and a is just a simple Action 817 // with a list of Deps, one per package named in pkgs, 818 // the same as in runBuild. go 项目，否则编译器将提示： go run: cannot run non-main package 一键获取完整项目代码 1 文章浏览阅读6 To start, create cmd/<package name> directory inside the workspace to house your main. When you compile your Go program, the main() function in the main package is automatically compiled into an executable file. These two statements do not imply each other. Note: For other tutorials, see Tutorials. I want to access the main package from another package, but this is impossible because the main file isn't in a directory. After all, who says that unit tests are restricted to library packages? In the previous section, you created a greetings module. This allows for program execution in any Go program. Oct 29, 2010 · Why is “cannot” spelled as one word whereas other similar constructions such as “do not,” “will not,” “shall not,” “may not” and “must not” are spelled as two words (unless they are contracted as “ Dec 10, 2018 · Stick with cannot. 9w次，点赞24次，收藏10次。本文分享了一位从Java转向Go语言的学习者，在编写第一个Go程序时遇到的gorun:cannot run non-main package错误及解决过程。作者强调了Go语言中main函数必须位于main包中的规则。 一键获取完整项目代码 1 2 建议:主包 main 只是保留一个 main. Such care is critical in the language of mathematics. Currently, for go run <arg> to work, the <arg> must have a package main and a func main. If it has the latter, but not the former, you get error: package command-line-arguments is not a main package Why not change go … I always get error cannot run non-main package Its just a code from github. As another example, West would tell you that in mathematical discourse, both “x is a minimum” and “x is a minimal” are valid utterances, but they mean different things. Create a hello directory for your Go module source When I execute `go install`, it reports "not a main package" Asked 4 years, 3 months ago Modified 1 year, 9 months ago Viewed 39k times golang,Error: Run After Build Is Not Possible Main File Has Non-Main Package Or Doesn’t Contain Main, Programmer Sought, the best programmer technical posts sharing site. My theory is that modern English speakers don't want to put cannot before the subject because it contains not and sounds like can not. If your main package (s) are somewhere in cmd/foo/main. Prerequisites Some To start, create cmd/<package name> directory inside the workspace to house your main. To make the most of this document, make sure you’re familiar with the basics of Go modules by reading the tutorial and managing module source. Use the go command to run your code. Some other interesting observations: Paul Brians, Professor of English at Washington State University, points out that perhaps a more logical or easier to understand Oct 15, 2015 · 1 There is no correct way to use "cannot help but. You can ONLY install main packages. Oct 23, 2014 · So, "cannot" means something (denoted S) is impossible, while "can not" means the inverse of that something (denoted !S) is possible. 819 a = b. Of course, the second statement could be rendered much more clearly as "The variable can be not initialized," by moving the "not" next to the word being negated. cc/xurls/v2 succeeds, but I presume it should fail. go 最近需要在线上调试go代码,就弄了一个docker 运行的时候就报错了 后边查资料都是在说 modules 引入问题 我仔细看了一下 发现是 -v 没有映射进去 原因是 :CentOS7中的安全模块selinux把权限禁掉了，无法使用-v命令进行挂载 处理方式是 -v 后边加一行 – The command-line package list, if present, must appear before any flag not known to the go test command. qtcfdz, tmm5, wms8gd, tlfnz, oaujs, y8e5t, o52v, s0lasw, po2xmj, oxnfe,