add: option to set cacheDir

README.md

@@ -62,6 +62,10 @@ Standard Options:
     If you're running multiple persistify instances from the same directory, use this to
     differentiate them.
 
+  --cache-dir                      [default: node_modules/flat-cache/.cache]
+
+    By default, the cache is saved to the default directory that flat-cache sets. This sets a custom directory for the cache files.
+
 ```
 
 ## Examples

bin/cmd.js

@@ -11,17 +11,20 @@ function run() {
   var _argv = process.argv.slice( 2 );
   var persistifyArgs = subarg( _argv, {
     alias: {
-      'n': 'never-cache'
+      'n': 'never-cache',
+      'd': 'cache-dir'
     }
   } );
 
   var watch = persistifyArgs.watch;
   var recreate = persistifyArgs.recreate;
   var neverCache = persistifyArgs[ 'never-cache' ];
   var cacheId = persistifyArgs[ 'cache-id' ];
+  var cacheDir = persistifyArgs[ 'cache-dir' ];
 
   var w = require( '../' )( null, {
     cacheId: cacheId,
+    cacheDir: cacheDir,
     command: _argv.join( ' ' ),
     neverCache: neverCache,
     watch: watch,

index.js

@@ -18,20 +18,21 @@ module.exports = function ( browserifyOpts, opts, argv ) {
 
   var id = 'persistify_' + hash( process.cwd() + trim( opts.cacheId ) );
   var depsCacheId = 'deps-cx-' + id;
+  var cacheDir = opts.cacheDir;
 
   var flatCache = require( 'flat-cache' );
   var fileEntryCache = require( 'file-entry-cache' );
 
   if ( opts.recreate ) {
-    flatCache.clearCacheById( id );
-    flatCache.clearCacheById( depsCacheId );
+    flatCache.clearCacheById( id, cacheDir );
+    flatCache.clearCacheById( depsCacheId, cacheDir );
   }
   // load the cache with id
-  var cache = flatCache.load( id );
+  var cache = flatCache.load( id, cacheDir );
 
   // load the file entry cache with id, or create a new
   // one if the previous one doesn't exist
-  var depsCacheFile = fileEntryCache.create( depsCacheId );
+  var depsCacheFile = fileEntryCache.create( depsCacheId, cacheDir );
 
   var ignoreCache = false;