[feat]: add --outfile arg for wasm cli

Signed-off-by: Dmitry Balashov <[email protected]>

wasm_builder/src/lib.rs

@@ -384,6 +384,11 @@ impl Output {
 
         Ok(wasm_data)
     }
+
+    /// Get the file path of the underlying WASM
+    pub fn wasm_file_path(&self) -> &PathBuf {
+        &self.wasm_file
+    }
 }
 
 // TODO: Remove cargo invocation (#2152)

wasm_builder_cli/Cargo.toml

@@ -13,3 +13,4 @@ iroha_wasm_builder.workspace = true
 clap = { workspace = true, features = ["derive"] }
 color-eyre.workspace = true
 spinoff = { workspace = true, features = ["binary", "dots12"] }
+owo-colors = { workspace = true, features = ["supports-colors"] }

wasm_builder_cli/README.md

@@ -13,11 +13,11 @@ iroha_wasm_builder_cli check path/to/project
 **Build the smartcontract:**
 
 ```bash
-iroha_wasm_builder_cli build path/to/project
+iroha_wasm_builder_cli build path/to/project --outfile ./smartcontract.wasm
 ```
 
 **Build with options:**
 
 ```bash
-iroha_wasm_builder_cli build path/to/project --optimize --format
+iroha_wasm_builder_cli build path/to/project --optimize --format --outfile ./smartcontract.wasm
 ```

wasm_builder_cli/src/main.rs

@@ -4,8 +4,9 @@ use std::{
 };
 
 use clap::{Args, Parser};
-use color_eyre::eyre::Context;
+use color_eyre::eyre::{eyre, Context};
 use iroha_wasm_builder::Builder;
+use owo_colors::OwoColorize;
 
 #[derive(Parser, Debug)]
 #[command(name = "iroha_wasm_builder_cli", version, author)]
@@ -26,6 +27,9 @@ enum Cli {
         /// Optimize WASM output.
         #[arg(long)]
         optimize: bool,
+        /// Where to store the output WASM. If the file exists, it will be overwritten.
+        #[arg(long)]
+        outfile: PathBuf,
     },
 }
 
@@ -47,6 +51,7 @@ fn main() -> color_eyre::Result<()> {
             common: CommonArgs { path },
             format,
             optimize,
+            outfile,
         } => {
             let builder = Builder::new(&path);
             let builder = if format { builder.format() } else { builder };
@@ -93,14 +98,17 @@ fn main() -> color_eyre::Result<()> {
                 output
             };
 
-            let bytes = output
-                .into_bytes()
-                .wrap_err("Failed to fetch the bytes of the output smartcontract")?;
+            std::fs::copy(output.wasm_file_path(), &outfile).wrap_err_with(|| {
+                eyre!(
+                    "Failed to write the resulting file into {}",
+                    outfile.display()
+                )
+            })?;
 
-            let mut writer = BufWriter::new(stdout());
-            writer
-                .write_all(&bytes)
-                .wrap_err("Failed to output the bytes")?;
+            eprintln!(
+                "✓ File is written into {}",
+                outfile.display().green().bold()
+            );
         }
     }