WIP: Support List[List[byte, N], N]

README.md

@@ -65,12 +65,15 @@ spectest subcommand
 ===================
 
 The `generated` directory is a good place to stick generated tests as it is already in the .gitignore for the project. Assuming the tarball in the example above has been downloaded to the repo directory, running the following command there will generate spectests for all prysm types described in the test fixture yaml config:
-```
-go run ./cmd/ssz spectest --release-uri=file://$PWD/mainnet-v1.3.0-rc.2.tar.gz --config=$PWD/specs/testdata/prysm.yaml --output=$PWD/generated
+```bash
+go run ./cmd/ssz spectest --release-uri=file://$PWD/mainnet-v1.3.0-rc.2.tar.gz --config=$PWD/specs/testdata/prysm.yaml --output=$PWD/spectests/v1alpha1
+
+go run ./cmd/ssz spectest --release-uri=file://$PWD/mainnet-v1.3.0-rc.2.tar.gz --config=$PWD/specs/testdata/engine-prysm.yaml --output=$PWD/spectests/engine
 ```
 
 Run the spectest like normal go tests:
 ```
-go test ./generated
-ok  	github.com/OffchainLabs/methodical-ssz/generated	1.003s
+go test ./spectests/...
+ok  	github.com/OffchainLabs/methodical-ssz/spectests/engine	0.110s
+ok  	github.com/OffchainLabs/methodical-ssz/spectests/v1alpha1	1.112s
 ```

cmd/ssz/generate.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/OffchainLabs/methodical-ssz/sszgen"
 	"github.com/OffchainLabs/methodical-ssz/sszgen/backend"
+	"github.com/pkg/errors"
 	"github.com/urfave/cli/v2"
 )
 
@@ -41,8 +42,11 @@ var generate = &cli.Command{
 	Action: func(c *cli.Context) error {
 		sourcePackage = c.Args().Get(0)
 		if sourcePackage == "" {
-			cli.ShowCommandHelp(c, "generate")
-			return fmt.Errorf("error: mising required <input package> argument")
+			missingErr := fmt.Errorf("error: missing required <input package> argument")
+			if err := cli.ShowCommandHelp(c, "generate"); err != nil {
+				return errors.Wrapf(missingErr, "unable to show help text, ShowCommandHelp error=%s", err.Error())
+			}
+			return missingErr
 		}
 		var err error
 		var fields []string

go.mod

@@ -30,18 +30,19 @@ require (
 	github.com/klauspost/cpuid/v2 v2.2.1 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
 	github.com/minio/sha256-simd v1.0.0 // indirect
-	github.com/mitchellh/mapstructure v1.4.1 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/prometheus/client_golang v1.14.0 // indirect
 	github.com/prometheus/client_model v0.3.0 // indirect
 	github.com/prometheus/common v0.39.0 // indirect
 	github.com/prometheus/procfs v0.9.0 // indirect
 	github.com/prysmaticlabs/gohashtree v0.0.2-alpha // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/stretchr/testify v1.8.2 // indirect
 	github.com/thomaso-mirodin/intmath v0.0.0-20160323211736-5dc6d854e46e // indirect
 	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
 	golang.org/x/crypto v0.5.0 // indirect
 	golang.org/x/mod v0.8.0 // indirect
-	golang.org/x/sys v0.5.0 // indirect
+	golang.org/x/sys v0.6.0 // indirect
 	golang.org/x/text v0.7.0 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 )

go.sum

@@ -52,8 +52,8 @@ github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zk
 github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
 github.com/minio/sha256-simd v1.0.0 h1:v1ta+49hkWZyvaKwrQB8elexRqm6Y0aMLjCNsrYxo6g=
 github.com/minio/sha256-simd v1.0.0/go.mod h1:OuYzVNI5vcoYIAmbIvHPl3N3jUzVedXbKy5RFepssQM=
-github.com/mitchellh/mapstructure v1.4.1 h1:CpVNEelQCZBooIPDn+AR3NpivK/TIKU8bDxdASFVQag=
-github.com/mitchellh/mapstructure v1.4.1/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
+github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
+github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 h1:RWengNIwukTxcDr9M+97sNutRR1RKhG96O6jWumTTnw=
 github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
@@ -88,8 +88,13 @@ github.com/sirupsen/logrus v1.9.0/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVs
 github.com/spf13/afero v1.2.2 h1:5jhuqJyZCZf2JRofRvN/nIFgIWNzPa3/Vz8mYylgbWc=
 github.com/spf13/afero v1.2.2/go.mod h1:9ZxEEn6pIJ8Rxe320qSDBk6AsU0r9pR7Q4OcevTdifk=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
+github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/syndtr/goleveldb v1.0.1-0.20220721030215-126854af5e6d h1:vfofYNRScrDdvS342BElfbETmL1Aiz3i2t0zfRj16Hs=
 github.com/thomaso-mirodin/intmath v0.0.0-20160323211736-5dc6d854e46e h1:cR8/SYRgyQCt5cNCMniB/ZScMkhI9nk8U5C7SbISXjo=
 github.com/thomaso-mirodin/intmath v0.0.0-20160323211736-5dc6d854e46e/go.mod h1:Tu4lItkATkonrYuvtVjG0/rhy15qrNGNTjPdaphtZ/8=
@@ -110,8 +115,8 @@ golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
 golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.5.0 h1:MUK/U/4lj1t1oPg0HfuXDN/Z1wv31ZJ/YcPiGccS4DU=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.7.0 h1:4BRB4x83lYWy72KwLD/qYDuTu7q9PjSagHvijDw7cLo=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=

specs/testdata/engine-prysm.yaml

@@ -0,0 +1,14 @@
+package: github.com/prysmaticlabs/prysm/v3/proto/engine/v1
+preset: mainnet
+defs:
+  - fork: bellatrix
+    types:
+      - name: ExecutionPayload
+      - name: ExecutionPayloadHeader
+  - fork: capella
+    types:
+      - name: ExecutionPayload
+        type_name: ExecutionPayloadCapella
+      - name: ExecutionPayloadHeader
+        type_name: ExecutionPayloadHeaderCapella
+      - name: Withdrawal