Move the cli into it’s own library

lib/cli/src/commands/validate.rs

@@ -0,0 +1,31 @@
+use crate::store::StoreOptions;
+use anyhow::{Context, Result};
+use std::path::PathBuf;
+use structopt::StructOpt;
+use wasmer::*;
+
+#[derive(Debug, StructOpt)]
+/// The options for the `wasmer validate` subcommand
+pub struct Validate {
+    /// File to validate as WebAssembly
+    #[structopt(name = "FILE", parse(from_os_str))]
+    path: PathBuf,
+
+    #[structopt(flatten)]
+    store: StoreOptions,
+}
+
+impl Validate {
+    /// Runs logic for the `validate` subcommand
+    pub fn execute(&self) -> Result<()> {
+        self.inner_execute()
+            .context(format!("failed to validate `{}`", self.path.display()))
+    }
+    fn inner_execute(&self) -> Result<()> {
+        let (store, _engine_type, _compiler_type) = self.store.get_store()?;
+        let module_contents = std::fs::read(&self.path)?;
+        Module::validate(&store, &module_contents)?;
+        eprintln!("Validation passed for `{}`.", self.path.display());
+        Ok(())
+    }
+}