Where exactly is the Go Modules dependency library stored?

Detailed explanation of the storage location of Go Modules dependency library

When many Go developers use Go Modules to manage dependencies, they often wonder where the downloaded dependency library is stored. The go.mod file only records the module information (path and version number) that the project depends on, rather than the actual code of the dependent library. So, where is the storage location of the dependency library?

The go mod download command will download the dependency library to a specific location, which is directly related to your GOPATH environment variable settings. The dependency library will be organized in GOPATH/pkg/mod directory according to the module path. Therefore, the key to finding a dependency library is to view your GOPATH environment variable settings. If GOPATH is not set, Go uses the default path, but this path varies by operating system and Go version, and it is not recommended to rely on the default path. It is recommended that you set GOPATH explicitly to better manage project dependencies.

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