Fix subcommand in windows

lib/utils.js

@@ -1,6 +1,7 @@
 'use strict';
 
 const spawn = require('child_process').spawn;
+const path = require('path');
 const pkginfo = require('pkginfo');
 const camelcase = require('camelcase');
 const stringSimilarity = require('string-similarity');
@@ -216,9 +217,10 @@ module.exports = {
             initial = items[item].init;
           }
 
-          usage += initial && isVersion === -1
-            ? ' ' + this.handleType(initial)[0]
-            : '';
+          usage +=
+            initial && isVersion === -1
+              ? ' ' + this.handleType(initial)[0]
+              : '';
         }
       }
 
@@ -244,7 +246,9 @@ module.exports = {
       // Add some space around it as well
       if (typeof defaultValue !== 'undefined') {
         if (typeof defaultValue === 'boolean') {
-          description += ` (${defaultValue ? 'enabled' : 'disabled'} by default)`;
+          description += ` (${defaultValue
+            ? 'enabled'
+            : 'disabled'} by default)`;
         } else {
           description += ` (defaults to ${JSON.stringify(defaultValue)})`;
         }
@@ -275,10 +279,10 @@ module.exports = {
     }
 
     // Generate full name of binary
-    const full =
-      this.binary +
-      '-' +
-      (Array.isArray(details.usage) ? details.usage[0] : details.usage);
+    const subCommand = Array.isArray(details.usage)
+      ? details.usage[0]
+      : details.usage;
+    let full = this.binary + '-' + subCommand;
 
     const args = process.argv;
     let i = 0;
@@ -288,10 +292,26 @@ module.exports = {
       i++;
     }
 
-    // Run binary of sub command
-    this.child = spawn(full, args, {
-      stdio: 'inherit'
-    });
+    if (process.platform === 'win32') {
+      const binaryExt = path.extname(this.binary);
+      const mainModule = process.mainModule.filename;
+
+      full = `${mainModule}-${subCommand}`;
+
+      if (path.extname(this.binary)) {
+        full = `${mainModule.replace(binaryExt, '')}-${subCommand}${binaryExt}`;
+      }
+      // Run binary of sub command on windows
+      args.unshift(full);
+      this.child = spawn(process.execPath, args, {
+        stdio: 'inherit'
+      });
+    } else {
+      // Run binary of sub command
+      this.child = spawn(full, args, {
+        stdio: 'inherit'
+      });
+    }
 
     // Throw an error if something fails within that binary
     this.child.on('error', err => {