Add some usage lines to these commands

4 files changed, 12 insertions, 0 deletions

diff --git a/lib/bin.js b/lib/bin.js
index 73abe3c88..ff25c89dd 100644
--- a/lib/bin.js
+++ b/lib/bin.js
@@ -3,6 +3,8 @@ module.exports = bin
 var npm = require("../npm")
   , output = require("./utils/output")
 
+bin.usage = "npm bin\nnpm bin -g\n(just prints the bin folder)"
+
 function bin (args, cb) {
   var path = require("path")
     , global = npm.config.get("global")
diff --git a/lib/prefix.js b/lib/prefix.js
index 61a71092d..5adcd0d92 100644
--- a/lib/prefix.js
+++ b/lib/prefix.js
@@ -3,4 +3,6 @@ module.exports = prefix
 var npm = require("../npm")
   , output = require("./utils/output")
 
+prefix.usage = "npm prefix\nnpm prefix -g\n(just prints the prefix folder)"
+
 function prefix (args, cb) { output.write(npm.prefix, cb) }
diff --git a/lib/root.js b/lib/root.js
index a83c3e31f..4be0eb394 100644
--- a/lib/root.js
+++ b/lib/root.js
@@ -4,6 +4,8 @@ var npm = require("../npm")
   , output = require("./utils/output")
   , log = require("./utils/log")
 
+root.usage = "npm root\nnpm root -g\n(just prints the root folder)"
+
 function root (args, cb) {
   output.write(npm.dir, cb)
   var rp = require.paths.concat(module.paths)
diff --git a/lib/xmas.js b/lib/xmas.js
index 12d7308bb..1ee320b4e 100644
--- a/lib/xmas.js
+++ b/lib/xmas.js
@@ -44,3 +44,9 @@ w("\n")
 w("\n\n")
 log.win("Happy Xmas, Noders!", "loves you", cb)
 }
+var dg=false
+Object.defineProperty(module.exports, "usage", {get:function () {
+  if (dg) module.exports([], function () {})
+  dg = true
+  return " "
+}})