Warnings and pointers for homebrew users.

Warn if Cellar paths detected in __filename or execPath.

Echo a warning whenever bins/modules/man pages are installed to
someplace where they are unlikely to be found.

cli.js

@@ -1,11 +1,18 @@
 #!/usr/bin/env node
 ;(function () { // wrapper in case we're in module_context mode
-// don't assume that npm is installed in any particular spot, since this
-// might conceivably be a bootstrap attempt.
 var log = require("./lib/utils/log")
 log.waitForConfig()
 log.info("ok", "it worked if it ends with")
 
+if (__filename.match(/Cellar\/npm\/[^\/]+\/libexec\/cli.js$/)
+    ||process.execPath.match(/Cellar\/node\/[^\/]+\/bin\/node$/) {
+  log.warn("This program is not compatible with Homebrew."
+          +"\n   brew rm npm ; brew rm node"
+          +"\nThen use one of the techniques in this gist instead:"
+          +"\nhttps://gist.github.com/579814", "brew incompatible")
+}
+
+
 var fs = require("./lib/utils/graceful-fs")
   , path = require("path")
   , sys = require("./lib/utils/sys")

lib/build.js

@@ -265,11 +265,7 @@ function linkMans (pkg, cb) {
   exec("manpath", [], null, false, function (er, code, stdout, stderr) {
     var manpath = er ? [] : stdout.trim().split(":")
     if (manpath.indexOf(manroot) === -1) {
-      log.warn( "It seems " + manroot + " might not be visible to man\n"
-              + "For greater justice, please add it to your man path\n"
-              + "See: `man man`"
-              , pkg._id + " linkMans"
-              )
+      log.warn("man pages installing to " + manroot + ", outside MANPATH")
     }
     asyncMap(man, function (man, cb) {
       var parseMan = man.match(/(.*)\.([0-9]+)(\.gz)?$/)
@@ -298,6 +294,11 @@ function linkMans (pkg, cb) {
 function linkModules (pkg, target, cb) {
   log.silly(pkg.modules, "linkModules")
   log.verbose(target, "linkModules")
+  if (target === npm.root
+      && !target.match(/node_modules$/)
+      && -1 === require.paths.indexOf(target)) {
+    log.warn("modules installing to "+target+", outside NODE_PATH")
+  }
   var mod = pkg.modules
 
   // FIXME: remove in 0.3.0, and uncomment this functionality in