What is the role of the go.mod file in managing dependencies in a Go project?

The go.mod file is used for managing dependencies of a Go project. It records the modules used and their versions, ensuring reproducible builds and simplifying library updates.

Main functions of go.mod:

• Defines the module (package) name of the project.
• Specifies the versions of external dependencies.
• Allows the Go build system to automatically download the required library versions.

Example content of go.mod:

module example.com/myproject

go 1.20

require (
    github.com/some/dependency v1.2.3
)