Move the cli into it’s own library

lib/cli/src/common.rs

@@ -0,0 +1,53 @@
+//! Common module with common used structures across different
+//! commands.
+use crate::VERSION;
+use std::env;
+use std::path::PathBuf;
+use structopt::StructOpt;
+
+#[derive(Debug, StructOpt, Clone)]
+/// The WebAssembly features that can be passed through the
+/// Command Line args.
+pub struct WasmFeatures {
+    /// Enable support for the SIMD proposal.
+    #[structopt(long = "enable-simd")]
+    pub simd: bool,
+
+    /// Enable support for the threads proposal.
+    #[structopt(long = "enable-threads")]
+    pub threads: bool,
+
+    /// Enable support for the reference types proposal.
+    #[structopt(long = "enable-reference-types")]
+    pub reference_types: bool,
+
+    /// Enable support for the multi value proposal.
+    #[structopt(long = "enable-multi-value")]
+    pub multi_value: bool,
+
+    /// Enable support for the bulk memory proposal.
+    #[structopt(long = "enable-bulk-memory")]
+    pub bulk_memory: bool,
+
+    /// Enable support for all pre-standard proposals.
+    #[structopt(long = "enable-all")]
+    pub all: bool,
+}
+
+/// Get the cache dir
+pub fn get_cache_dir() -> PathBuf {
+    match env::var("WASMER_CACHE_DIR") {
+        Ok(dir) => {
+            let mut path = PathBuf::from(dir);
+            path.push(VERSION);
+            path
+        }
+        Err(_) => {
+            // We use a temporal directory for saving cache files
+            let mut temp_dir = env::temp_dir();
+            temp_dir.push("wasmer");
+            temp_dir.push(VERSION);
+            temp_dir
+        }
+    }
+}