fix(transitioner): catch whitespaces properly

Author: wzrdtales

lib/transitions/try-require.js

@@ -7,9 +7,15 @@ var installed = false;
 var removedGlobals = {
   'dbm is not defined': globalHandler,
   'async is not defined': globalHandler,
+  'Cannot find module \'db-migrate\'': missingDBMigrate,
   'Cannot find module \'async\'': installAsync
 };
 
+function missingDBMigrate(migration, retry) {
+
+  return globalHandler(migration.path, retry);
+}
+
 function installAsync(migration, retry) {
 
   var cmd = [ 'install', '--save', 'async' ];
@@ -29,18 +35,22 @@ function installAsync(migration, retry) {
 }
 
 function globalHandler(migration, retry) {
-
   var data = fs.readFileSync(migration, 'utf8');
   data = data.replace(
-    /^dbm = dbm \|\| require\(\s+'db-migrate'\s+\)/m,
+    /^dbm = dbm \|\| require\((?!\s)?'db-migrate'(?!\s)?\)/m,
+    'var dbm'
+  );
+
+  data = data.replace(
+    /^var dbm = global\.dbm \|\| require\((?!\s)?'db-migrate'(?!\s)?\)/m,
     'var dbm'
   );
 
   if(data.indexOf('async = async || require') !== -1) {
 
     handled = true;
     data = data.replace(
-      /^async = async \|\| require\(\s+'async'\s+\)/m,
+      /^async = async \|\| require\((?!\s)?'async'(?!\s)?\)/m,
       'var async = require( \'async\' )'
     );
   }