Fix bug in the civo provider to avoid infinite record creation

docs/tutorials/civo.md

@@ -2,7 +2,7 @@
 
 This tutorial describes how to setup ExternalDNS for usage within a Kubernetes cluster using Civo DNS Manager.
 
-Make sure to use **>0.12.2** version of ExternalDNS for this tutorial.
+Make sure to use **>0.13.5** version of ExternalDNS for this tutorial.
 
 ## Managing DNS with Civo
 
@@ -12,8 +12,7 @@ If you want to learn about how to use Civo DNS Manager read the following tutori
 
 ## Get Civo Token
 
-Copy the token in the settings fo your account
-
+Copy the token in the settings for your account
 The environment variable `CIVO_TOKEN` will be needed to run ExternalDNS with Civo.
 
 ## Deploy ExternalDNS

provider/civo/civo.go

@@ -46,6 +46,11 @@ type CivoChanges struct {
 	Updates []*CivoChangeUpdate
 }
 
+// Empty returns true if there are no changes
+func (c *CivoChanges) Empty() bool {
+	return len(c.Creates) == 0 && len(c.Updates) == 0 && len(c.Deletes) == 0
+}
+
 // CivoChangeCreate Civo Domain Record Creates
 type CivoChangeCreate struct {
 	Domain  civogo.DNSDomain
@@ -169,6 +174,11 @@ func (p *CivoProvider) fetchZones(ctx context.Context) ([]civogo.DNSDomain, erro
 
 // submitChanges takes a zone and a collection of Changes and sends them as a single transaction.
 func (p *CivoProvider) submitChanges(ctx context.Context, changes CivoChanges) error {
+	if changes.Empty() {
+		log.Info("All records are already up to date")
+		return nil
+	}
+
 	for _, change := range changes.Creates {
 		logFields := log.Fields{
 			"Type":     change.Options.Type,

provider/civo/civo_test.go

@@ -809,6 +809,154 @@ func TestCivo_submitChangesDelete(t *testing.T) {
 	assert.NoError(t, err)
 }
 
+func TestCivoChangesEmpty(t *testing.T) {
+	// Test empty CivoChanges
+	c := &CivoChanges{}
+	assert.True(t, c.Empty())
+
+	// Test CivoChanges with Creates
+	c = &CivoChanges{
+		Creates: []*CivoChangeCreate{
+			{
+				Domain: civogo.DNSDomain{
+					ID:        "12345",
+					AccountID: "1",
+					Name:      "example.com",
+				},
+				Options: &civogo.DNSRecordConfig{
+					Type:     civogo.DNSRecordTypeA,
+					Name:     "www",
+					Value:    "192.1.1.1",
+					Priority: 0,
+					TTL:      600,
+				},
+			},
+		},
+	}
+	assert.False(t, c.Empty())
+
+	// Test CivoChanges with Updates
+	c = &CivoChanges{
+		Updates: []*CivoChangeUpdate{
+			{
+				Domain: civogo.DNSDomain{
+					ID:        "12345",
+					AccountID: "1",
+					Name:      "example.com",
+				},
+				DomainRecord: civogo.DNSRecord{
+					ID:          "76cc107f-fbef-4e2b-b97f-f5d34f4075d3",
+					AccountID:   "1",
+					DNSDomainID: "12345",
+					Name:        "mail",
+					Value:       "192.168.1.2",
+					Type:        "MX",
+					Priority:    10,
+					TTL:         600,
+				},
+				Options: civogo.DNSRecordConfig{
+					Type:     "MX",
+					Name:     "mail",
+					Value:    "192.168.1.3",
+					Priority: 10,
+					TTL:      600,
+				},
+			},
+		},
+	}
+	assert.False(t, c.Empty())
+
+	// Test CivoChanges with Deletes
+	c = &CivoChanges{
+		Deletes: []*CivoChangeDelete{
+			{
+				Domain: civogo.DNSDomain{
+					ID:        "12345",
+					AccountID: "1",
+					Name:      "example.com",
+				},
+				DomainRecord: civogo.DNSRecord{
+					ID:          "76cc107f-fbef-4e2b-b97f-f5d34f4075d3",
+					AccountID:   "1",
+					DNSDomainID: "12345",
+					Name:        "mail",
+					Value:       "192.168.1.3",
+					Type:        "MX",
+					Priority:    10,
+					TTL:         600,
+				},
+			},
+		},
+	}
+	assert.False(t, c.Empty())
+
+	// Test CivoChanges with Creates, Updates, and Deletes
+	c = &CivoChanges{
+		Creates: []*CivoChangeCreate{
+			{
+				Domain: civogo.DNSDomain{
+					ID:        "12345",
+					AccountID: "1",
+					Name:      "example.com",
+				},
+				Options: &civogo.DNSRecordConfig{
+					Type:     civogo.DNSRecordTypeA,
+					Name:     "www",
+					Value:    "192.1.1.1",
+					Priority: 0,
+					TTL:      600,
+				},
+			},
+		},
+		Updates: []*CivoChangeUpdate{
+			{
+				Domain: civogo.DNSDomain{
+					ID:        "12345",
+					AccountID: "1",
+					Name:      "example.com",
+				},
+				DomainRecord: civogo.DNSRecord{
+					ID:          "76cc107f-fbef-4e2b-b97f-f5d34f4075d3",
+					AccountID:   "1",
+					DNSDomainID: "12345",
+					Name:        "mail",
+					Value:       "192.168.1.2",
+					Type:        "MX",
+					Priority:    10,
+					TTL:         600,
+				},
+				Options: civogo.DNSRecordConfig{
+					Type:     "MX",
+					Name:     "mail",
+					Value:    "192.168.1.3",
+					Priority: 10,
+					TTL:      600,
+				},
+			},
+		},
+		Deletes: []*CivoChangeDelete{
+			{
+				Domain: civogo.DNSDomain{
+					ID:        "12345",
+					AccountID: "1",
+					Name:      "example.com",
+				},
+				DomainRecord: civogo.DNSRecord{
+					ID:          "76cc107f-fbef-4e2b-b97f-f5d34f4075d3",
+					AccountID:   "1",
+					DNSDomainID: "12345",
+					Name:        "mail",
+					Value:       "192.168.1.3",
+					Type:        "MX",
+					Priority:    10,
+					TTL:         600,
+				},
+			},
+		},
+	}
+	assert.False(t, c.Empty())
+}
+
 // This function is an adapted copy of the testify package's ElementsMatch function with the
 // call to ObjectsAreEqual replaced with cmp.Equal which better handles struct's with pointers to
 // other structs. It also ignores ordering when comparing unlike cmp.Equal.