git.diff

--- git.js	2015-05-11 16:19:29.114852900 -0400
+++ git-patched.js	2015-05-11 16:19:35.788234600 -0400
@@ -12,14 +12,23 @@
   , git = npm.config.get("git")
   , assert = require("assert")
   , log = require("npmlog")
+  , win32 = process.platform === "win32"
+  , cygwin = win32 && (process.env.ORIGINAL_PATH || '').indexOf('/cygdrive/') != -1
 
 function prefixGitArgs () {
-  return process.platform === "win32" ? ["-c", "core.longpaths=true"] : []
+  return win32 ? ["-c", "core.longpaths=true"] : []
 }
 
 function execGit (args, options, cb) {
-  log.info('git', args)
+  if(cygwin && args) {
+      for(var i=0; i<args.length; i++) {
+          if(':\\'.indexOf(args[i]) != 1) {
+              args[i] = args[i].replace(/\\/g, '/').replace(/^([A-Za-z])\:\//, '/cygdrive/$1/');
+          }
+      }
+  }
   var fullArgs = prefixGitArgs().concat(args || [])
+  log.info('git', fullArgs)
   return exec(git, fullArgs, options, cb)
 }