Improve ls command

src/puter-shell/coreutils/ls.js

@@ -1,3 +1,6 @@
+// INCONST: called 'path' instead of 'path_' elsewhere
+import path_ from "path-browserify";
+
 export default {
     name: 'ls',
     args: {
@@ -18,8 +21,25 @@ export default {
 
         const paths = positionals.length < 1
             ? [pwd] : positionals ;
+
+
+        // DRY: also done in mkdir, cat, and mv
+        const resolve = relPath => {
+            if ( relPath.startsWith('/') ) {
+                return relPath;
+            }
+            return path_.resolve(ctx.vars.pwd, relPath);
+        }
+
+        const showHeadings = paths.length > 1 ? async ({ i, path }) => {
+            if ( i !== 0 ) ctx.externs.out.write('\n');
+            await ctx.externs.out.write(path + ':\n');
+        } : () => {};
 
-        for ( const path of paths ) {
+        for ( let i=0 ; i < paths.length ; i++ ) {
+            let path = paths[i];
+            await showHeadings({ i, path });
+            path = resolve(path);
             const result = await puterShell.command('list', { path });
             for ( const item of result ) {
                 await ctx.externs.out.write(item.name + '\n');