程序包code.google.com/p/go.example/hello:exec:"hg":在％PATH％中找不到可执行文件.如何获得远程golang软件包? [英] package code.google.com/p/go.example/hello: exec: "hg": executable file not found in %PATH%. How to get remote golang packages?

问题描述

我是按照Golang教程 http://golang.org/doc/code编写的.html#remote

I do as written an the Golang tutorial http://golang.org/doc/code.html#remote

我的环境设置:

C:\sbox\go\example>set go
    GOPATH=C:\sbox\go\example
    GOROOT=C:\Go

example/文件夹仅具有 src/文件夹:

The example/ folder has only src/ folder:

C:\sbox\go\example\
             |
             --src\

现在，我按照所述致电 go get 并收到错误消息:

Now I call go get as described and get an error:

C:\sbox\go\example>go get code.google.com/p/go.example/hello
# cd .; hg clone -U https://code.google.com/p/go.example C:\sbox\go\example\src\code.google.com\p\go.example
package code.google.com/p/go.example/hello: exec: "hg": executable file not found in %PATH%

在调用 go 之后，我的 example/文件夹变成了这样:

After calling go get, though, my example/ folder becomes like this:

C:\sbox\go\example\
             |
             --src\
                |
                code.google.com\
                       |
                       --p\

仅此而已.无需再安装了.

And that's all. Nothing more installed.

然后，我将代码添加到目录结构中，如下所示:

Then I add a code to my directory structure and it becomes like this:

C:\sbox\go\example\
             |
             --src\
                |
                ---code.google.com\
                |        |
                |        --p\
                |
                ---github.com\
                       |
                       --user\
                           |
                           --hello\
                           |   |
                           |   --hello.go
                           |
                           --newmath\
                                |
                                --sqrt.go

hello.go 是这样的:

package main

import (
    "fmt"
    "github.com/user/newmath"
    //"code.google.com/p/go.example/newmath"
)

func main() {
    fmt.Printf("Hello, world.  Sqrt(2) = %v\n", newmath.Sqrt(2))
}

sqrt.go 像这样:

// Package newmath is a trivial example package.
package newmath

// Sqrt returns an approximation to the square root of x.
func Sqrt(x float64) float64 {
    z := 0.0
    for i := 0; i < 1000; i++ {
        z -= (z*z - x) / (2 * x)
    }
    return z
}

我只是应付/粘贴它们.全部如本教程中所写.然后，我开始安装并运行该项目.一切正常:

I just cope/paste them. All as written in the tutorial. Then I do go install and run the project. All works fine:

C:\sbox\go\example\src\github.com\user\hello>go install

C:\sbox\go\example\bin>hello
Hello, world.  Sqrt(2) = 1.414213562373095

现在，我再次运行 go get 并得到相同的错误:

Now I again run go get and get the same error:

C:\sbox\go\example>go get code.google.com/p/go.example/hello
# cd .; hg clone -U https://code.google.com/p/go.example C:\sbox\go\example\src\code.google.com\p\go.example
package code.google.com/p/go.example/hello: exec: "hg": executable file not found in %PATH%

好吧，我将 bin/目录添加到PATH并再次运行 go get ，但得到相同的错误:

Ok, I add bin/ directory to the PATH and run go get again but get the same error:

C:\sbox\go\example>set PATH=%PATH%;C:\sbox\go\example\bin

C:\sbox\go\example>go get code.google.com/p/go.example/hello
# cd .; hg clone -U https://code.google.com/p/go.example C:\sbox\go\example\src\code.google.com\p\go.example
package code.google.com/p/go.example/hello: exec: "hg": executable file not found in %PATH%

我需要如何获得本教程中所述的结果-已安装远程软件包并且可以使用它们?

What do I need to do get the result as described in the tutorial - remote packages are installed and I can use them?

推荐答案

您要安装的软件包在Mercurial( hg )源代码管理系统下.您需要安装 Mercurial 才能克隆该软件包.

The package you are trying to install is under the Mercurial (hg) source control system. You need to install Mercurial to be able to clone the package.

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