How to build lego with only Cloudflare and Google Domains DNS providers?

[abdeldjalil-fellah]

How to build lego with only Cloudflare and Google Domains DNS providers (to reduce the binary size)?

[ldez]

This is not possible.

The binary size is about 100MiB, I think it's already small.

[abdeldjalil-fellah]

but it keeps increasing.
I suggest a solution similar to what rclone does, its binary size can be reduced by commenting unused providers in backends/all/all.go and cmd/all/all.go:

In some situations, rclone executable size might be too big for deployment in very restricted environments when all backends with large SDKs are included. To limit binary size unused backends can be commented out in backends/all/all.go and unused commands in cmd/all/all.go before building with go build or make. [link]

[ldez]

but it keeps increasing.

Yes, but by only a few MiB.

I don't plan to change the way to build for now.

[abdeldjalil-fellah]

this solution works for me (keep only cloudflare and rfc2136):

• delete all unused DNS providers directories in providers/dns/* except cloudflare and rfc2136
• update providers/dns/zz_gen_dns_providers.go

// Code generated by 'make generate-dns'; DO NOT EDIT.

package dns

import (
	"fmt"

	"github.com/go-acme/lego/v4/challenge"
	"github.com/go-acme/lego/v4/challenge/dns01"
	"github.com/go-acme/lego/v4/providers/dns/cloudflare"
	"github.com/go-acme/lego/v4/providers/dns/rfc2136"
)

// NewDNSChallengeProviderByName Factory for DNS providers.
func NewDNSChallengeProviderByName(name string) (challenge.Provider, error) {
	switch name {
	case "manual":
		return dns01.NewDNSProviderManual()
	case "cloudflare":
		return cloudflare.NewDNSProvider()
	case "rfc2136":
		return rfc2136.NewDNSProvider()
	default:
		return nil, fmt.Errorf("unrecognized DNS provider: %s", name)
	}
}

• build:
  • cd /d "cmd\lego"
  • go build -trimpath -ldflags "-s -w" -o "lego.exe"

the binary size has been decreased from 110MB to 22MB