Support .wat files in the explore command (#8314)

* Support `.wat` files in the `explore` command

Many on the `wasmtime` subcommands work with either `.wasm` or `.wat`
files, but `explore` only works with `.wasm`. This change accepts `.wat`
as well.

* use wat feature

src/commands/explore.rs

@@ -2,7 +2,7 @@
 
 use anyhow::{Context, Result};
 use clap::Parser;
-use std::path::PathBuf;
+use std::{borrow::Cow, path::PathBuf};
 use wasmtime_cli_flags::CommonOptions;
 
 /// Explore the compilation of a WebAssembly module to native code.
@@ -32,8 +32,15 @@ impl ExploreCommand {
 
  let config = self.common.config(self.target.as_deref())?;
 
- let wasm = std::fs::read(&self.module)
- .with_context(|| format!("failed to read Wasm module: {}", self.module.display()))?;
+ let bytes =
+ Cow::Owned(std::fs::read(&self.module).with_context(|| {
+ format!("failed to read Wasm module: {}", self.module.display())
+ })?);
+ #[cfg(feature = "wat")]
+ let bytes = wat::parse_bytes(&bytes).map_err(|mut e| {
+ e.set_path(&self.module);
+ e
+ })?;
 
  let output = self
  .output
@@ -43,7 +50,7 @@ impl ExploreCommand {
  .with_context(|| format!("failed to create file: {}", output.display()))?;
  let mut output_file = std::io::BufWriter::new(output_file);
 
- wasmtime_explorer::generate(&config, self.target.as_deref(), &wasm, &mut output_file)?;
+ wasmtime_explorer::generate(&config, self.target.as_deref(), &bytes, &mut output_file)?;
  println!("Exploration written to {}", output.display());
  Ok(())
  }