Implement wasmer run {url}

lib/cli/src/commands/run.rs

@@ -11,6 +11,8 @@ use std::collections::HashMap;
 use std::ops::Deref;
 use std::path::PathBuf;
 use std::str::FromStr;
+use std::sync::Arc;
+use url::Url;
 use wasmer::FunctionEnv;
 use wasmer::*;
 #[cfg(feature = "cache")]
@@ -827,6 +829,10 @@ pub(crate) fn try_run_package_or_file(
 ) -> Result<(), anyhow::Error> {
     let debug_msgs_allowed = isatty::stdout_isatty();
 
+    if let Ok(url) = url::Url::parse(&format!("{}", r.path.display())) {
+        return try_run_url(&url, args, r, debug);
+    }
+
     // Check "r.path" is a file or a package / command name
     if r.path.exists() {
         if r.path.is_dir() && r.path.join("wapm.toml").exists() {
@@ -908,3 +914,30 @@ pub(crate) fn try_run_package_or_file(
     // else: local package not found - try to download and install package
     try_autoinstall_package(args, &sv, package_download_info, r.force_install)
 }
+
+fn try_run_url(url: &Url, _args: &[String], r: &Run, _debug: bool) -> Result<(), anyhow::Error> {
+    let checksum = wasmer_registry::get_remote_webc_checksum(&url)
+        .map_err(|e| anyhow::anyhow!("error fetching {url}: {e}"))?;
+
+    if !wasmer_registry::get_all_installed_webc_packages()
+        .iter()
+        .any(|p| p.checksum == checksum)
+    {
+        let sp = start_spinner(format!("Installing {}", url));
+
+        wasmer_registry::install_webc_package(&url, &checksum)
+            .map_err(|e| anyhow::anyhow!("error fetching {url}: {e}"))?;
+
+        if let Some(sp) = sp {
+            sp.close();
+        }
+    }
+
+    let webc_install_path = wasmer_registry::get_webc_dir()
+        .ok_or_else(|| anyhow::anyhow!("Error installing package: webc download failed"))?
+        .join(checksum);
+
+    let mut r = r.clone();
+    r.path = webc_install_path;
+    r.execute()
+}