chore: use derive for eq checks

go.mod

@@ -111,6 +111,7 @@ require (
 	github.com/apparentlymart/go-textseg/v15 v15.0.0 // indirect
 	github.com/authzed/authzed-go v1.4.1 // indirect
 	github.com/authzed/grpcutil v0.0.0-20250221190651-1985b19b35b8 // indirect
+	github.com/awalterschulze/goderive v0.5.1 // indirect
 	github.com/bhmj/xpression v0.9.4 // indirect
 	github.com/bitfield/gotestdox v0.2.2 // indirect
 	github.com/bmatcuk/doublestar v1.3.4 // indirect
@@ -150,6 +151,7 @@ require (
 	github.com/jonboulle/clockwork v0.5.0 // indirect
 	github.com/jzelinskie/stringz v0.0.3 // indirect
 	github.com/kevinburke/ssh_config v1.2.0 // indirect
+	github.com/kisielk/gotool v1.0.0 // indirect
 	github.com/klauspost/asmfmt v1.3.2 // indirect
 	github.com/minio/asm2plan9s v0.0.0-20200509001527-cdd76441f9d8 // indirect
 	github.com/minio/c2goasm v0.0.0-20190812172519-36a3d3bbc4f3 // indirect
@@ -532,6 +534,7 @@ require (
 )
 
 tool (
+	github.com/awalterschulze/goderive
 	github.com/google/wire/cmd/wire
 	github.com/jmattheis/goverter/cmd/goverter
 	github.com/oapi-codegen/oapi-codegen/v2/cmd/oapi-codegen

go.sum

@@ -864,6 +864,8 @@ github.com/authzed/grpcutil v0.0.0-20250221190651-1985b19b35b8 h1:y17oq4U8n+k1Oc
 github.com/authzed/grpcutil v0.0.0-20250221190651-1985b19b35b8/go.mod h1:Pf1ZSi41EePvx1GC1DeEJw5dn35iUcxZHqpHuG1Rpic=
 github.com/avast/retry-go/v4 v4.7.0 h1:yjDs35SlGvKwRNSykujfjdMxMhMQQM0TnIjJaHB+Zio=
 github.com/avast/retry-go/v4 v4.7.0/go.mod h1:ZMPDa3sY2bKgpLtap9JRUgk2yTAba7cgiFhqxY2Sg6Q=
+github.com/awalterschulze/goderive v0.5.1 h1:H2XNRDw0Ordwj/pgLAVqQgDC1LQWP7L99ofOs72bjqg=
+github.com/awalterschulze/goderive v0.5.1/go.mod h1:DLlff0SRVo846CBrp8nXuXJ4mdWA92ai5CYTr+LV/II=
 github.com/aws/aws-lambda-go v1.49.0 h1:z4VhTqkFZPM3xpEtTqWqRqsRH4TZBMJqTkRiBPYLqIQ=
 github.com/aws/aws-lambda-go v1.49.0/go.mod h1:dpMpZgvWx5vuQJfBt0zqBha60q7Dd7RfgJv23DymV8A=
 github.com/aws/aws-sdk-go v1.15.27/go.mod h1:mFuSZ37Z9YOHbQEwBWztmVzqXrEkub65tZoCYDt7FT0=
@@ -1797,6 +1799,7 @@ github.com/kevinburke/ssh_config v1.2.0/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF
 github.com/keybase/go-keychain v0.0.1 h1:way+bWYa6lDppZoZcgMbYsvC7GxljxrskdNInRtuthU=
 github.com/keybase/go-keychain v0.0.1/go.mod h1:PdEILRW3i9D8JcdM+FmY6RwkHGnhHxXwkPPMeUgOK1k=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
+github.com/kisielk/gotool v1.0.0 h1:AV2c/EiW3KqPNT9ZKl07ehoAGi4C5/01Cfbblndcapg=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/asmfmt v1.3.2 h1:4Ri7ox3EwapiOjCki+hw14RyKk201CN4rzyCJRFLpK4=
 github.com/klauspost/asmfmt v1.3.2/go.mod h1:AG8TuvYojzulgDAMCnYn50l/5QV3Bs/tp6j0HLHbNSE=
@@ -2002,8 +2005,6 @@ github.com/oklog/ulid v1.3.1 h1:EGfNDEx6MqHz8B3uNV6QAib1UR2Lm97sHi3ocA6ESJ4=
 github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn4U=
 github.com/oklog/ulid/v2 v2.1.1 h1:suPZ4ARWLOJLegGFiZZ1dFAkqzhMjL3J1TzI+5wHz8s=
 github.com/oklog/ulid/v2 v2.1.1/go.mod h1:rcEKHmBBKfef9DhnvX7y1HZBYxjXb0cP5ExxNsTT1QQ=
-github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
-github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY=
 github.com/oliveagle/jsonpath v0.0.0-20180606110733-2e52cf6e6852 h1:Yl0tPBa8QPjGmesFh1D0rDy+q1Twx6FyU7VWHi8wZbI=
 github.com/oliveagle/jsonpath v0.0.0-20180606110733-2e52cf6e6852/go.mod h1:eqOVx5Vwu4gd2mmMZvVZsgIqNSaW3xxRThUJ0k/TPk4=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=

openmeter/billing/generate.go

@@ -0,0 +1,3 @@
+package billing
+
+//go:generate go run github.com/awalterschulze/goderive

openmeter/billing/invoicedetailedline.go

@@ -3,7 +3,6 @@ package billing
 import (
 	"errors"
 	"fmt"
-	"reflect"
 	"slices"
 
 	"github.com/alpacahq/alpacadecimal"
@@ -115,7 +114,7 @@ func (l DetailedLineBase) Clone() DetailedLineBase {
 }
 
 func (l DetailedLineBase) Equal(other DetailedLineBase) bool {
-	return reflect.DeepEqual(l, other)
+	return deriveEqualDetailedLineBase(&l, &other)
 }
 
 type DetailedLine struct {

openmeter/billing/invoiceline.go

@@ -3,7 +3,6 @@ package billing
 import (
 	"errors"
 	"fmt"
-	"reflect"
 	"slices"
 	"sort"
 	"strings"
@@ -17,7 +16,6 @@ import (
 	"github.com/openmeterio/openmeter/openmeter/productcatalog"
 	"github.com/openmeterio/openmeter/openmeter/streaming"
 	"github.com/openmeterio/openmeter/pkg/currencyx"
-	"github.com/openmeterio/openmeter/pkg/equal"
 	"github.com/openmeterio/openmeter/pkg/models"
 	"github.com/openmeterio/openmeter/pkg/timeutil"
 )
@@ -125,7 +123,7 @@ type LineBase struct {
 }
 
 func (i LineBase) Equal(other LineBase) bool {
-	return reflect.DeepEqual(i, other)
+	return deriveEqualLineBase(&i, &other)
 }
 
 func (i LineBase) GetParentID() (string, bool) {
@@ -647,35 +645,7 @@ type UsageBasedLine struct {
 }
 
 func (i UsageBasedLine) Equal(other *UsageBasedLine) bool {
-	if other == nil {
-		return false
-	}
-
-	if !i.Price.Equal(other.Price) {
-		return false
-	}
-
-	if i.FeatureKey != other.FeatureKey {
-		return false
-	}
-
-	if !equal.PtrEqual(i.Quantity, other.Quantity) {
-		return false
-	}
-
-	if !equal.PtrEqual(i.MeteredQuantity, other.MeteredQuantity) {
-		return false
-	}
-
-	if !equal.PtrEqual(i.PreLinePeriodQuantity, other.PreLinePeriodQuantity) {
-		return false
-	}
-
-	if !equal.PtrEqual(i.MeteredPreLinePeriodQuantity, other.MeteredPreLinePeriodQuantity) {
-		return false
-	}
-
-	return true
+	return deriveEqualUsageBasedLine(&i, other)
 }
 
 func (i UsageBasedLine) Clone() *UsageBasedLine {