inital commit, which is clearly not initial

Signed-off-by: Uncle Stretch <uncle.stretch@ghostchain.io>

utils/generate-bags/src/main.rs

@@ -0,0 +1,55 @@
+//! Make the set of voting bag thresholds to be used in `voter_bags.rs`.
+//!
+//! Generally speaking this script can be run once per runtime never touched
+//! again. It can be resued to generate a wholly different quantity of bags,
+//! or if the existential deposit changes, etc.
+
+use clap::{Parser, ValueEnum};
+use generate_bags::generate_thresholds;
+use std::path::{Path, PathBuf};
+use casper_runtime::Runtime as CasperRuntime;
+
+#[derive(Clone, Debug, ValueEnum)]
+#[value(rename_all = "kebab-case")]
+enum Runtime {
+    Casper,
+}
+
+impl Runtime {
+    fn generate_thresholds_fn(
+        &self,
+    ) -> Box<dyn FnOnce(usize, &Path, u128, u128) -> Result<(), std::io::Error>> {
+        match self {
+            Runtime::Casper => Box::new(generate_thresholds::<CasperRuntime>),
+        }
+    }
+}
+
+#[derive(Debug, Parser)]
+struct Opt {
+    /// How many bags to generate.
+    #[arg(long, default_value_t = 200)]
+    n_bags: usize,
+
+    /// Which runtime to generate.
+    #[arg(long, ignore_case = true, value_enum, default_value_t = Runtime::Casper)]
+    runtime: Runtime,
+
+    /// Where to write the output.
+    #[arg(short, long, value_name="FILE")]
+    output: PathBuf,
+
+    /// The total issuance of the native currency (`value` * 10^18).
+    #[arg(short, long)]
+    total_issuance: u128,
+
+    /// The minimum account balance (i.e. existential deposit) for the native
+    /// currency. (`value` * 10^18)
+    #[arg(short, long)]
+    minimum_balance: u128,
+}
+
+fn main() -> Result<(), std::io::Error> {
+    let Opt { n_bags, output, runtime, total_issuance, minimum_balance } = Opt::parse();
+    runtime.generate_thresholds_fn()(n_bags, &output, total_issuance, minimum_balance)
+}