initialize geth via the standard json

Signed-off-by: xermicus <bigcyrill@hotmail.com>

crates/config/src/lib.rs

@@ -0,0 +1,39 @@
+//! The global configuration used accross all revive differential testing crates.
+
+use std::{path::PathBuf, sync::OnceLock};
+
+use clap::Parser;
+
+static ARGUMENTS: OnceLock<Arguments> = OnceLock::new();
+
+/// Get the command line arguments.
+pub fn get_args() -> &'static Arguments {
+    ARGUMENTS.get_or_init(Arguments::parse)
+}
+
+#[derive(Debug, Parser, Clone)]
+#[command(
+    name = "revive compiler differential tester utility",
+    arg_required_else_help = true
+)]
+pub struct Arguments {
+    /// The path to the `resolc` executable to be tested.
+    ///
+    /// By default it uses the `resolc` binary found in `$PATH`.
+    #[arg(long = "resolc", short, default_value = "resolc")]
+    pub resolc: PathBuf,
+
+    /// A list of test corpus JSON files to be tested.
+    #[arg(long = "corpus", short)]
+    pub corpus: Vec<PathBuf>,
+
+    /// A place to store temporary artifacts during test execution.
+    #[arg(long = "workdir", short)]
+    pub working_directory: PathBuf,
+
+    /// The path to the `geth` executable.
+    ///
+    /// By default it uses `geth` binary found in `$PATH`.
+    #[arg(short, long = "geth", default_value = "geth")]
+    pub geth: PathBuf,
+}