goimport is a tool to add, remove, or replace imports in Go files.

Install it with go install zgo.at/goimport@latest.

Example usage:

# Add errors package.
$ goimport -add errors foo.go
# Remove errors package.
$ goimport -rm errors foo.go
# Add errors package aliased as "errs"
$ goimport -add errors:errs foo.go
# Either add an import or replace existing errors with
# github.com/pkg/errors.
$ goimport -replace github.com/pkg/errors foo.go
# Try to "go get" package if it's not found.
$ goimport -get -add github.com/pkg/errors foo.go
# Print out only the import block as JSON (useful for editor integrations).
$ goimport -json -add github.com/pkg/errors foo.go

See goimport -h for the full help.