test-utils: add chain-spec-builder cli (#1061)

* test-utils: add chain-spec-builder cli

* style changes, mostly indentation

* fix padding

* add issue to todo

* more style fixes

* share seed padding with keystore

* fix master rebase error

substrate/test-utils/chain-spec-builder/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "chain-spec-builder"
+version = "0.1.0"
+authors = ["haydn dufrene <haydn.dufrene@gmail.com>"]
+
+[dependencies]
+clap = { version = "~2.32", features = ["yaml"] }
+node-cli = { path = "../../node/cli" }
+substrate-primitives = { path = "../../core/primitives" }
+substrate-service = { path = "../../core/service" }

substrate/test-utils/chain-spec-builder/src/cli.yml

@@ -0,0 +1,24 @@
+name: chain-spec-builder
+author: "azban <me@azban.net>"
+about: Utility for creating chain specs primarily for testing
+args:
+- initial_authority_seed:
+    short: a
+    value_name: INITIAL_AUTHORITY_SEED
+    help: Initial authority seed
+    takes_value: true
+    multiple: true
+    required: true
+- endowed_account_seed:
+    short: e
+    value_name: ENDOWED_ACCOUNT_SEED
+    help: Endowed account seed
+    takes_value: true
+    multiple: true
+    required: true
+- upgrade_key_seed:
+    short: u
+    value_name: UPGRADE_KEY_SEED
+    help: Upgrade key seed
+    takes_value: true
+    required: true

substrate/test-utils/chain-spec-builder/src/main.rs

@@ -0,0 +1,51 @@
+#[macro_use]
+extern crate clap;
+
+use clap::App;
+
+extern crate node_cli;
+extern crate substrate_service;
+extern crate substrate_primitives;
+
+use node_cli::chain_spec;
+use substrate_service::chain_ops::build_spec;
+
+fn genesis_constructor() -> chain_spec::GenesisConfig {
+	let yaml = load_yaml!("./cli.yml");
+	let matches = App::from_yaml(yaml).get_matches();
+	let authorities = matches.values_of("initial_authority_seed")
+		.unwrap()
+		.map(chain_spec::get_authority_id_from_seed)
+		.collect();
+
+	let endowed_accounts = matches.values_of("endowed_account_seed")
+		.unwrap()
+		.map(chain_spec::get_authority_id_from_seed)
+		.collect();
+
+	let upgrade_key_seed = matches.value_of("upgrade_key_seed").unwrap();
+	let upgrade_key = chain_spec::get_authority_id_from_seed(upgrade_key_seed);
+	chain_spec::testnet_genesis(
+		authorities,
+		upgrade_key.into(),
+		Some(endowed_accounts),
+	)
+}
+
+fn generate_chain_spec() -> String {
+	let chain_spec = chain_spec::ChainSpec::from_genesis(
+		"Custom",
+		"custom",
+		genesis_constructor,
+		vec![],
+		None,
+		None,
+		None,
+	);
+	build_spec(chain_spec, false).unwrap()
+}
+
+fn main() {
+	let json = generate_chain_spec();
+	println!("{}", json);
+}