Revert "cache file access"

This reverts commit fde3538493.

Conflicts:

	lib/directoryindex.js

lib/directoryindex.js

@@ -1,66 +0,0 @@
-var _ = require('underscore');
-var fs = require('fs');
-var path = require('path');
-var util = require('util');
-var EventEmitter = require('events').EventEmitter;
-
-module.exports = DirectoryIndex;
-util.inherits(DirectoryIndex, EventEmitter)
-function DirectoryIndex(dir) {
-    this.filepath = dir;
-
-    // Initialize and continually update the directory index.
-    this.update = _(this.update).bind(this);
-    process.nextTick(this.update)
-    fs.watchFile(dir, this.update);
-}
-
-DirectoryIndex.prototype.getList = function(callback) {
-    if (!this.list) this.once('updated', done);
-    else done.call(this);
-
-    function done() {
-        if (this.err) callback(this.err);
-        else callback(null, this.list);
-    }
-};
-
-DirectoryIndex.prototype.getID = function(id, callback) {
-    if (!this.list) this.once('updated', done);
-    else done.call(this);
-
-    function done() {
-        if (this.err) callback(this.err);
-        else if (!this.list[id]) callback(new Error('Tileset not found'));
-        else callback(null, this.list[id]);
-    }
-}
-
-DirectoryIndex.prototype.update = function() {
-    var index = this;
-    fs.readdir(index.filepath, function(err, files) {
-        index.err = err;
-        index.list = {};
-        if (!err) for (var i = 0; i < files.length; i++) {
-            var name = files[i].match(/^([\w-]+)\.mbtiles$/);
-            if (name) {
-                index.list[name[1]] = 'mbtiles://' + path.join(index.filepath, name[0]);
-            }
-        }
-        index.emit('updated');
-    });
-};
-
-var cache = DirectoryIndex.cache = {};
-DirectoryIndex.create = function(filepath) {
-    if (!cache[filepath]) {
-        var oldpath = filepath;
-        filepath = path.resolve(filepath);
-        if (!cache[filepath]) {
-            cache[filepath] = new DirectoryIndex(filepath);
-        }
-        // Avoid path.resolve() calls.
-        cache[oldpath] = cache[filepath];
-    }
-    return cache[filepath];
-};

lib/mbtiles.js

@@ -10,9 +10,6 @@ var _ = require('underscore'),
     sm = new (require('sphericalmercator')),
     sqlite3 = require('sqlite3');
 
-var DirectoryIndex = require('./directoryindex');
-
-
 if (process.env.NODE_ENV === 'test') sqlite3.verbose();
 
 function noop(err) {
@@ -112,13 +109,26 @@ MBTiles.registerProtocols = function(tilelive) {
 
 // Finds all mbtiles file in the filepath and returns their tilesource URI.
 MBTiles.list = function(filepath, callback) {
-    DirectoryIndex.create(filepath).getList(callback);
+    filepath = path.resolve(filepath);
+    fs.readdir(filepath, function(err, files) {
+        if (err) return callback(err);
+        for (var result = {}, i = 0; i < files.length; i++) {
+            var name = files[i].match(/^([\w-]+)\.mbtiles$/);
+            if (name) result[name[1]] = 'mbtiles://' + path.join(filepath, name[0]);
+        }
+        return callback(null, result);
+    });
 };
 
 // Finds an mbtiles file with the given ID in the filepath and returns a
 // tilesource URI.
 MBTiles.findID = function(filepath, id, callback) {
-    DirectoryIndex.create(filepath).getID(id, callback);
+    filepath = path.resolve(filepath);
+    var file = path.join(filepath, id + '.mbtiles');
+    fs.stat(file, function(err, stats) {
+        if (err) return callback(err);
+        else return callback(null, 'mbtiles://' + file);
+    });
 };
 
 // Retrieve the schema of the current mbtiles database and inform the caller of