build: add npx to installers

PR-URL: https://github.com/nodejs/node/pull/14235
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

tools/install.py

@@ -98,6 +98,15 @@ def npm_files(action):
   else:
     assert(0) # unhandled action type
 
+  # create/remove symlink
+  link_path = abspath(install_path, 'bin/npx')
+  if action == uninstall:
+    action([link_path], 'bin/npx')
+  elif action == install:
+    try_symlink('../lib/node_modules/npm/bin/npx-cli.js', link_path)
+  else:
+    assert(0) # unhandled action type
+
 def subdir_files(path, dest, action):
   ret = {}
   for dirpath, dirnames, filenames in os.walk(path):

tools/msvs/msi/product.wxs

@@ -95,6 +95,8 @@
              Description="!(loc.npm_Description)">
       <ComponentRef Id="NpmCmdScript"/>
       <ComponentRef Id="NpmBashScript"/>
+      <ComponentRef Id="NpxCmdScript"/>
+      <ComponentRef Id="NpxBashScript"/>
       <ComponentRef Id="NpmConfigurationFile"/>
       <ComponentRef Id="AppData" />
       <ComponentGroupRef Id="NpmSourceFiles"/>
@@ -215,6 +217,14 @@
         <File Id="npm.sh" KeyPath="yes" Source="$(var.NpmSourceDir)\bin\npm"/>
       </Component>
 
+      <Component Id="NpxCmdScript">
+        <File Id="npx.cmd" KeyPath="yes" Source="$(var.NpmSourceDir)\bin\npx.cmd"/>
+      </Component>
+
+      <Component Id="NpxBashScript">
+        <File Id="npx.sh" KeyPath="yes" Source="$(var.NpmSourceDir)\bin\npx"/>
+      </Component>
+
       <Directory Id="NodeModulesFolder" Name="node_modules">
         <Directory Id="NpmFolder" Name="npm">
           <Component Id="NpmConfigurationFile">

tools/osx-pkg-postinstall.sh

@@ -3,3 +3,4 @@
 # TODO Can we extract $PREFIX from the installer?
 cd /usr/local/bin
 ln -sf ../lib/node_modules/npm/bin/npm-cli.js npm
+ln -sf ../lib/node_modules/npm/bin/npx-cli.js npx