我正在使用 Visual Studio Code 1.33.1 版作为我们的 Go 应用程序的 IDE。我们想为我们的应用程序使用 Go 版本 1.11。但是看起来我们正在使用的一个或多个依赖项已经为 Go 1.12 下载了一个包。现在，VS Code 无法构建应用程序并出现以下错误:

go build golang.org/x/sys/unix: module requires Go 1.12 go build github.com/pelletier/go-toml: module requires Go 1.12 go [1,1]

我尝试重新安装 Go 1.11，删除有问题的软件包并让它重新安装。无论我何时尝试构建 VS Code，下载 1.12 版本都无法构建。 我希望 VS Code 不要下载 1.12 版本的包并将其限制为 1.11。

最佳答案

Go 1.12 Release Notes (February 2019)

Modules

The go directive in a go.mod file now indicates the version of the language used by the files within that module. It will be set to the current release (go 1.12) if no existing version is present. If the go directive for a module specifies a version newer than the toolchain in use, the go command will attempt to build the packages regardless, and will note the mismatch only if that build fails.

This changed use of the go directive means that if you use Go 1.12 to build a module, thus recording go 1.12 in the go.mod file, you will get an error when attempting to build the same module with Go 1.11 through Go 1.11.3. Go 1.11.4 or later will work fine, as will releases older than Go 1.11. If you must use Go 1.11 through 1.11.3, you can avoid the problem by setting the language version to 1.11, using the Go 1.12 go tool, via go mod edit -go=1.11.

$ go help go.mod

The go.mod file itself is line-oriented, with // comments but
no /* */ comments. Each line holds a single directive, made up of a
verb followed by arguments. For example:

  module my/thing
  go 1.12
  require other/thing v1.0.2
  require new/thing/v2 v2.3.4
  exclude old/thing v1.2.3
  replace bad/thing v1.4.5 => good/thing v1.4.5

The verbs are
  module, to define the module path;
  go, to set the expected language version;
  require, to require a particular module at a given version or later;
  exclude, to exclude a particular module version from use; and
  replace, to replace a module version with a different module version.

Go1.12 中首次引入了一个可能的解决方案:go.mod 动词 go，用于设置预期的语言版本。

更新:

Comment: I tried using the suggested command: go mod edit -go=1.11 I got an error: flag provided but not defined: -go I manually edited to add go 1.11 right under my module declaration in all go.mod files, it did not work. – user2995358

您的结果在意料之中。正如我之前所解释的和文档所述，go.mod 动词 go 是在 Go1.12 中首次引入的。

比如预期的结果，

$ go version
go version go1.11.10 linux/amd64
$ go mod edit -go=1.11
flag provided but not defined: -go
usage: go mod edit [editing flags] [go.mod]
Run 'go help mod edit' for details.
$ 

$ go version
go version go1.12.5 linux/amd64
$ go mod edit -go=1.11
$ 

阅读文档:

$ go version
go version go1.11.10 linux/amd64
$ go1.11 help modules

Preliminary module support

Go 1.11 includes preliminary support for Go modules,
including a new module-aware 'go get' command.
We intend to keep revising this support, while preserving compatibility,
until it can be declared official (no longer preliminary),
and then at a later point we may remove support for work
in GOPATH and the old 'go get' command.
$ 


$ go version
go version devel +004fb5cb8d Fri May 3 03:49:11 2019 +0000 linux/amd64
$ go help modules

Module support

Go 1.13 includes official support for Go modules,
including a module-aware 'go get' command.
Module-aware mode is active by default.
$

Go 1.11 仅包括对 Go 模块的初步支持。 Go 1.13 包含对 Go 模块的完整官方支持。

为什么您期望 Go1.11 中的一切都可以在仅初步支持的情况下完美运行？

关于go - 限制 VS Code for Go 仅下载 v 1.11 的包，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55998703/