feat(cli): override static files datadir (#7212)

Co-authored-by: Oliver Nordbjerg <onbjerg@users.noreply.github.com>
Co-authored-by: Alexey Shekhirin <a.shekhirin@gmail.com>
Co-authored-by: Oliver Nordbjerg <hi@notbjerg.me>

crates/node-core/src/args/datadir_args.rs

@@ -0,0 +1,53 @@
+//! clap [Args](clap::Args) for datadir config
+
+use crate::dirs::{ChainPath, DataDirPath, MaybePlatformPath};
+use clap::Args;
+use reth_primitives::Chain;
+use std::path::PathBuf;
+
+/// Parameters for datadir configuration
+#[derive(Debug, Args, PartialEq, Eq, Default, Clone)]
+#[command(next_help_heading = "Datadir")]
+pub struct DatadirArgs {
+    /// The path to the data dir for all reth files and subdirectories.
+    ///
+    /// Defaults to the OS-specific data directory:
+    ///
+    /// - Linux: `$XDG_DATA_HOME/reth/` or `$HOME/.local/share/reth/`
+    /// - Windows: `{FOLDERID_RoamingAppData}/reth/`
+    /// - macOS: `$HOME/Library/Application Support/reth/`
+    #[arg(long, value_name = "DATA_DIR", verbatim_doc_comment, default_value_t)]
+    pub datadir: MaybePlatformPath<DataDirPath>,
+
+    /// The absolute path to store static files in.
+    #[arg(long = "datadir.static_files", verbatim_doc_comment, value_name = "PATH")]
+    pub static_files_path: Option<PathBuf>,
+}
+
+impl DatadirArgs {
+    /// Resolves the final datadir path.
+    pub fn resolve_datadir(self, chain: Chain) -> ChainPath<DataDirPath> {
+        let datadir = self.datadir.clone();
+        datadir.unwrap_or_chain_default(chain, self)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use clap::Parser;
+
+    /// A helper type to parse Args more easily
+    #[derive(Parser)]
+    struct CommandParser<T: Args> {
+        #[command(flatten)]
+        args: T,
+    }
+
+    #[test]
+    fn test_parse_datadir_args() {
+        let default_args = DatadirArgs::default();
+        let args = CommandParser::<DatadirArgs>::parse_from(["reth"]).args;
+        assert_eq!(args, default_args);
+    }
+}

crates/node-core/src/args/mod.rs

@@ -51,6 +51,10 @@ pub use dev::DevArgs;
 mod pruning;
 pub use pruning::PruningArgs;
 
+/// DatadirArgs for configuring data storage paths
+mod datadir_args;
+pub use datadir_args::DatadirArgs;
+
 pub mod utils;
 
 pub mod types;