How do you create a new Go module?
Aug 02, 2025 am 09:29 AM
To create a new Go module, first use the go mod init command to initialize the module, then write the code and add the dependencies, and finally run go mod tidy to sort out the dependencies. 1. Run go mod init <module-name> (such as go mod init github.com/yourusername/myproject) in the project directory to generate go.mod file; 2. Write code and import external packages. When running go build or go run, Go will automatically download dependencies and update go.mod and go.sum; 3. Run go mod tidy to clean up unused dependencies and synchronize dependencies. After completing these steps, the module is correctly created and configured.
To create a new Go module, you use the go mod init command followed by the module's name (usually the import path). Here's how:
1. Initialize the Module
Open your terminal, navigate to your project directory, and run:
go mod init <module-name>
Replace <module-name> with the desired name, typically your project's import path. For example:
go mod init github.com/yourusername/myproject
This creates a go.mod file in the current directory, which tracks your module's properties, including its name and Go version.
? If you're not planning to publish the module, you can use any name (eg,
go mod init myapp), but using a unique path helps avoid import conflicts.
2. Add Code and Dependencies
Once initialized, you can start writing Go code. When you import external packages and run commands like go build , go run , or go test , Go automatically adds required dependencies to a go.sum file and updates go.mod with the correct versions.
Example:
package main
import "rsc.io/quote"
func main() {
println(quote.Hello())
}Run:
go run main.go
Go will automatically download the dependency and add it to go.mod .
3. Tidy Up (Optional but Recommended)
To clean up unused dependencies or ensure everything is in sync:
go mod tidy
This removes unused entries and adds missing ones.
That's it — you've created a new Go module. The key steps are go mod init and letting Go management dependencies as you build. Basically just start with go mod init and go from there.
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