Consider adding support for other DNS/DDNS providers such as Route53, DuckDNS, etc.

Acceptance Criteria

• Project is renamed (new name TBD)
• Support for Route53
• Support for DuckDNS
• Support Azure
• Support Namecheap

Acceptance Criteria

• An actual CloudFlare account with a real domain has its DNS records updated
• Can be run through GitHub Actions, retrieving the CloudFlare domain name, record name, and API token with GitHub secrets, which allows anyone to run the tests in their own fork
• Covers case of changing IP as well as no-op when IP is already up to date

Acceptance Criteria

• The deb file currently built by fpm gets uploaded to an Ubuntu PPA automatically upon each new tagged release
• PPA PGP key is stored in GitHub secrets

Add a daemon mode that keeps the program running and periodically updating DNS. A new flag, --daemon, will specify how often DNS should refresh. It will take a required argument of a Go-style duration, e.g. 10m, 1hr, etc, as defined here. The env var DAEMON can be set to achieve the same effect, with its value set to the duration, e.g. DAEMON=15m.

Please add an option to specify a script that returns the IP address, rather than querying DNS or other external URLs.

The E2E tests run cloudflare-ddns as an actual compiled program, performing a full end-to-end test against CloudFlare. This creates a problem where coverage data cannot be easily captured. Use the Go test binary coverage hack method (see https://blog.cloudflare.com/go-coverage-with-external-tests for one example) and merge coverage data with unit test coverage data before publishing coverage results.

rac@r2d2:~$ bin/updateCF
cloudflare-ddns --domain anttirytsola.fi --record r2d2 --token ...  --verbose
12:15PM INF Found public IP '34.75.222.'
12:15PM DBG Examining DNS record ID '9512c5261a71d4334357bf4c4dd58390' with name 'anttirytsola.fi'
12:15PM DBG Examining DNS record ID '0b2c47be8026ccead6ea06ab7197c5d1' with name 'horizon.anttirytsola.fi'
12:15PM DBG Examining DNS record ID '86588276cf8bce7116a0915aeafa8cd6' with name 'r2d2.anttirytsola.fi'
12:15PM DBG Examining DNS record ID '1e7f2a3a91b9d4dce5e10ba776b1f3a6' with name 'rytsolafi.anttirytsola.fi'
12:15PM DBG Examining DNS record ID 'c746198fe7c0bd772f02cb1018fab1ab' with name 'www.anttirytsola.fi'
12:15PM INF No DNS record 'r2d2' found for domain 'anttirytsola.fi', creating now
Error: failed to create DNS record 'r2d2' on domain 'anttirytsola.fi': HTTP status 400: Record already exists. (81057)
12:15PM ERR HTTP status 400: Record already exists. (81057)
cloudflare/cloudflare.go:75: failed to create DNS record 'r2d2' on domain 'anttirytsola.fi'

Seems to be cloudflare.go 58.. 85

in this case record is hostname r2d2 and when checking r.Name is with domain, r2d2.anttirytsola.fi

    }
    // Find the specific record
    var recordID string
    for _, r := range records {
        log.Debug().Msgf("Examining DNS record ID '%s' with name '%s'", r.ID, r.Name)
        if r.Name == record {         <-  This check fails. 
            recordID = r.ID
            if r.Content == ip {
                log.Info().Msgf("DNS record '%s' is already set to IP '%s'", record, ip)
                return nil
            }
            break
        }
    }
    // Create the record if it's not already there
    if recordID == "" {
        log.Info().Msgf("No DNS record '%s' found for domain '%s', creating now", record, domain)
        resp, err := p.client.CreateDNSRecord(p.ctx, zoneID, cloudflare.DNSRecord{
            Content: ip,
            Type:    "A",
            Name:    record,
        })
        if err != nil {
            return errors.Annotatef(err, "failed to create DNS record '%s' on domain '%s'", record, domain)
        }
        recordID = resp.Result.ID
    }

I have a host that has a static IPv6 address but its IPv4 address is dynamic. I'd like to update the IPv4 when it changes, but cloudflare-ddns-client obtains the IPv6 and tries to set it for the A record which of course fails:

10:37PM INF Found public IP '2600:1900:...
...
Error: failed to update DNS record '<redacted>' to IP address '2600:1900:...': HTTP status 400: Content for A record must be a valid IPv4 address. (9005)

The DNS and URL queries need to force an IPv4 connection, the equivalent of:
dig -4 myip.opendns.com A @resolver1.opendns.com

The IP lookup code is useful on its own, factor it into a new Go library and consume that library from this project.

Acceptance Criteria

• There exists a new GitHub repo for the new public IP package
• The new package also has a very simple command-line interface (no flags needed other than -version and -help)
• The command outputs the public IP to stdout and any errors or warnings to stderr

The help says:

--config string Path to config file. If not specified will look for cloudflare-ddns.toml in the program dir (), $HOME/.config, or /etc, in that order

But running it without --config it does not find the file in /etc/cloudflare-ddns.toml even though it exists and it's readable. Invoking with an explicit --config /etc/cloudflare-ddns.toml works.