port python gen utility to rust

Cargo.toml

@@ -1,5 +1,8 @@
 [workspace]
+resolver = "2"
+
 members = [
     "ssz-rs",
     "ssz-rs-derive",
+    "ssz-rs-test-gen"
 ]

ssz-rs-test-gen/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "ssz-rs-test-gen"
+version = "0.1.0"
+edition = "2021"
+license = "MIT OR Apache-2.0"
+readme = "./README.md"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+serde = "1.0"
+serde_yaml = "0.9"
+num-bigint = "0.4.3"
+hex = "0.4.3"
+convert_case = "0.6.0"

ssz-rs-test-gen/README.md

@@ -0,0 +1,11 @@
+# ssz-rs-test-gen
+
+Utility for generating the integration tests for `ssz_rs`.
+
+## How to use
+
+```bash
+just clean
+just download-integration-tests
+just generate-all
+```

ssz-rs-test-gen/justfile

@@ -0,0 +1,33 @@
+default-fmt := "true"
+
+generate-all:
+    #!/usr/bin/env sh
+    for TYP in basic_vector bitlist bitvector boolean containers uints; do
+        just generate $TYP false
+    done;
+    just fmt
+
+generate TYPE FMT=default-fmt:
+    cargo run -p ssz-rs-test-gen {{TYPE}}
+    if {{FMT}} == true; then just fmt; fi
+
+fmt:
+    cargo +nightly fmt --all
+
+generate-clean:
+    rm -rf ../ssz-rs/tests/data
+
+download-integration-tests: integration-tests-clean
+    #!/usr/bin/env sh
+    TESTS_TAG=$(cat spec-test-version)
+    REPO_NAME=consensus-spec-tests
+    CONFIG="general"
+    mkdir ${REPO_NAME}
+    wget https://github.com/ethereum/${REPO_NAME}/releases/download/${TESTS_TAG}/${CONFIG}.tar.gz
+    tar -xzf ${CONFIG}.tar.gz -C ${REPO_NAME}
+    rm -f *tar.gz
+
+integration-tests-clean:
+    rm -rf consensus-spec-tests
+
+clean: generate-clean integration-tests-clean

ssz-rs-test-gen/spec-test-version

@@ -0,0 +1 @@
+v1.3.0