feat: log skipped modules

Closes #2

README.md

@@ -3,8 +3,8 @@
 In `package.json`:
 ```
   "allowScripts": {
-    "fsevents": "*",
-    "node-sass": "*"
+    "fsevents": "*", # allow install scripts in all versions
+    "node-sass": false # ignore install scripts
   }
 ```
 

lib/index.js

@@ -11,10 +11,10 @@ const internals = {};
 
 internals.scan = (tree, parent, map = new Map(), scanned = new Set()) => {
 
-    for (const [k, v] of tree.dependencies) {
+    for (const [, v] of tree.dependencies) {
 
         if (v.hasCycle()) {
-            console.warn(`Cycle in ${k} - skipping`);
+            console.warn(`==========> skip ${v.path()} (because it has a cycle in dependencies)`);
             continue;
         }
 
@@ -69,13 +69,18 @@ exports.run = (cmd = 'install') => {
 
             return childPkg.scripts && (childPkg.scripts[cmd] || childPkg.scripts[`pre${cmd}`] || childPkg.scripts[`post${childPkg}`]);
         })
-        .filter(([,childPkg]) => {
+        .filter(([path, childPkg]) => {
 
             const name = childPkg.name;
+
             if (allowed[name] === undefined) {
                 throw new Error(`No entry for ${name}`);
             }
 
+            if (!allowed[name]) {
+                console.warn(`==========> skip ${path} (because it is not allowed in package.json)`);
+            }
+
             return allowed[name];
         })
         .forEach(([path, childPkg]) => {