Add export-embedded-runtime subcommand (#505)

crates/humanode-peer/src/cli/run.rs

@@ -177,6 +177,7 @@ pub async fn run() -> sc_cli::Result<()> {
                 cmd.run(partial.client, frontier_backend)
             })
         }
+        Some(Subcommand::ExportEmbeddedRuntime(cmd)) => cmd.run().await,
         #[cfg(feature = "try-runtime")]
         Some(Subcommand::TryRuntime(cmd)) => {
             let runner = root.create_humanode_runner(cmd)?;

crates/humanode-peer/src/cli/subcommand/export_embedded_runtime.rs

@@ -0,0 +1,30 @@
+//! The command to export embedded runtime WASM.
+
+use std::path::PathBuf;
+
+use tokio::io::AsyncWriteExt;
+
+/// The command.
+#[derive(Debug, clap::Parser)]
+pub struct ExportEmbeddedRuntimeCmd {
+    /// Specify the output path.
+    #[clap(long, short = 'o')]
+    out: Option<PathBuf>,
+}
+
+impl ExportEmbeddedRuntimeCmd {
+    /// Run the export embedded runtime command.
+    pub async fn run(&self) -> sc_cli::Result<()> {
+        let data = humanode_runtime::WASM_BINARY.ok_or_else(|| {
+            sc_cli::Error::Application("WASM binary is not embedded in this build".into())
+        })?;
+
+        match self.out {
+            Some(ref path) => tokio::fs::write(path, data).await,
+            None => tokio::io::stdout().write_all(data).await,
+        }
+        .map_err(sc_cli::Error::Io)?;
+
+        Ok(())
+    }
+}

crates/humanode-peer/src/cli/subcommand/mod.rs

@@ -6,6 +6,7 @@ use super::CliConfigurationExt;
 
 pub mod bioauth;
 pub mod ethereum;
+pub mod export_embedded_runtime;
 
 /// Humanode peer subcommands.
 #[derive(Debug, clap::Subcommand)]
@@ -51,6 +52,9 @@ pub enum Subcommand {
     /// Db meta columns information.
     FrontierDb(fc_cli::FrontierDbCmd),
 
+    /// Export the runtime WASM code embedded in this binary.
+    ExportEmbeddedRuntime(export_embedded_runtime::ExportEmbeddedRuntimeCmd),
+
     /// Try some command against runtime state.
     #[cfg(feature = "try-runtime")]
     TryRuntime(try_runtime_cli::TryRuntimeCmd),