Remove write operations from virtual fs

lib/fs/index.js

@@ -1,13 +1,10 @@
 var _ = require('lodash');
 var path = require('path');
-var Buffer = require('buffer').Buffer;
-var destroy = require('destroy');
-var os = require('os');
 
 var Promise = require('../utils/promise');
 
 /*
-A filesystem is an interface to read/write files
+A filesystem is an interface to read files
 GitBook can works with a virtual filesystem, for example in the browser.
 */
 
@@ -36,11 +33,6 @@ FS.prototype.stat = function(filename) {
     // To implement for each fs
 };
 
-// Write a file and returns a promise
-FS.prototype.write = function(filename, buffer) {
-    // To implement for each fs
-};
-
 // List files/directories in a directory
 FS.prototype.readdir = function(folder) {
     // To implement for each fs
@@ -49,11 +41,6 @@ FS.prototype.readdir = function(folder) {
 // These methods don't require to be redefined, by default it uses .exists, .read, .write, .list
 // For optmization, it can be redefined:
 
-// Allocate a new temporary directory
-FS.prototype.tmpdir = function() {
-    return path.resolve(os.tmpdir(), 'gitbook_tmp_'+Date.now());
-};
-
 // List files in a directory
 FS.prototype.listFiles = function(folder) {
     return this.readdir(folder)
@@ -96,46 +83,6 @@ FS.prototype.readAsString = function(filename) {
     });
 };
 
-// Write a stream to a file and returns a promise
-FS.prototype.writeStream = function(filename, stream) {
-    var bufs = [];
-    var d = Promise.defer();
-
-    var cleanup = function() {
-        destroy(stream);
-        stream.removeAllListeners();
-    };
-
-    stream.on('data', function(d) {
-        bufs.push(d);
-    });
-
-    stream.on('error', function(err) {
-        cleanup();
-
-        d.reject(err);
-    });
-
-    stream.on('end', function(){
-        cleanup();
-
-        var buf = Buffer.concat(bufs);
-        d.resolve(buf);
-    });
-
-    return d.promise;
-};
-
-// Copy a file
-FS.prototype.copy = function(from, to) {
-    var that = this;
-
-    return this.read(from)
-    .then(function(buf) {
-        return that.write(to, buf);
-    });
-};
-
 // Find a file in a folder (case incensitive)
 // Return the real filename
 FS.prototype.findFile = function findFile(root, filename) {

lib/fs/node.js

@@ -26,19 +26,6 @@ NodeFS.prototype.stat = function(filename) {
     return fs.stat(filename);
 };
 
-// Write a file and returns a promise
-NodeFS.prototype.write = function(filename, buffer) {
-    var folder = path.dirname(filename);
-    return Promise()
-    .then(function() {
-        if (!folder) return;
-        return fs.mkdirp(folder);
-    })
-    .then(function() {
-        return fs.writeFile(filename, buffer);
-    });
-};
-
 // List files in a directory
 NodeFS.prototype.readdir = function(folder) {
     return fs.readdir(folder)