Initial browser builder

Rakefile

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+require 'json'
+
+LIBRARY = [ "api.js", "feed.js", "lib.js", "cli.js" ]
+BROWSER_TOOLS = Dir.glob("browser/*").select{|x| x != "browser/export.js" }
+
+task :default => :export
+
+desc 'Export Follow for use in web browsers'
+task :export => ([:clean, "cli.js"] + LIBRARY + BROWSER_TOOLS) do |task|
+  build = "./build"
+  target = "#{build}/follow"
+
+  sh "mkdir", "-p", target
+  LIBRARY.each do |js|
+    sh "node", "browser/export.js", js, "#{target}/#{js}"
+  end
+
+  BROWSER_TOOLS.each do |file|
+    sh "cp", file, build
+  end
+
+  File.open("#{build}/boot.js", 'w') do |boot|
+    requirejs_paths = { 'request' => '../request.jquery',
+                        # 'foo' => 'bar', etc.
+                      }
+
+    opts = { # 'baseUrl' => "follow",
+             'paths'   => requirejs_paths,
+           }
+
+    main_js = "follow/cli.js"
+
+    boot.write([ 'require(',
+                   '// Options',
+                   opts.to_json() + ',',
+                   '',
+                   '// Modules',
+                   [main_js].to_json() + ',',
+                   '',
+                   '// Code to run when ready',
+                   'function(main) { return main(); }',
+                 ');'
+               ].join("\n"));
+  end
+end
+
+desc 'Clean up build files'
+task :clean do
+  sh "rm", "-rf", "./build"
+end

browser/export.js

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+#!/usr/bin/env node
+// Export Follow in browser-friendly format.
+//
+// Copyright 2011 Iris Couch
+//
+//    Licensed under the Apache License, Version 2.0 (the "License");
+//    you may not use this file except in compliance with the License.
+//    You may obtain a copy of the License at
+//
+//        http://www.apache.org/licenses/LICENSE-2.0
+//
+//    Unless required by applicable law or agreed to in writing, software
+//    distributed under the License is distributed on an "AS IS" BASIS,
+//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//    See the License for the specific language governing permissions and
+//    limitations under the License.
+
+var fs = require('fs')
+  , path = require('path')
+  ;
+
+if(process.argv[1] === module.filename) {
+  var source = process.argv[2]
+    , dest   = process.argv[3]
+    ;
+
+  if(!source || !dest)
+    throw new Error("usage: browser-export.js <source> <target>");
+
+  install(source, dest, function(er) {
+    if(er) throw er;
+  });
+}
+
+function install(filename, target, callback) {
+  //console.log('Exporting: ' + filename);
+  fs.readFile(filename, null, function(er, content) {
+    if(er && er.errno) er = new Error(er.stack); // Make a better stack trace.
+    if(er) return callback(er);
+
+    // Strip the shebang.
+    content = content.toString('utf8');
+    var content_lines = content.split(/\n/);
+    content_lines[0] = content_lines[0].replace(/^(#!.*)$/, '// $1');
+
+    // TODO
+    // content_lines.join('\n'), maybe new Buffer of that
+
+    //Convert the Node module (CommonJS) to RequireJS.
+    var require_re = /\brequire\(['"]([\w\d\-_\/\.]+?)['"]\)/g;
+
+    // No idea why I'm doing this but it's cool.
+    var match, dependencies = {};
+    while(match = require_re.exec(content))
+      dependencies[ match[1] ] = true;
+    dependencies = Object.keys(dependencies);
+    dependencies.forEach(function(dep) {
+      //console.log('  depends: ' + dep);
+    })
+
+    // In order to keep the error message line numbers correct, this makes an ugly final file.
+    content = [ 'require.def(function(require, exports, module) {'
+              //, 'var module = {};'
+              //, 'var exports = {};'
+              //, 'module.exports = exports;'
+              , ''
+              , content_lines.join('\n')
+              , '; return(module.exports);'
+              , '}); // define'
+              ].join('');
+    //content = new Buffer(content);
+
+    fs.writeFile(target, content, 'utf8', function(er) {
+      if(er) return callback(er);
+      return callback();
+    })
+  })
+}

browser/index.html

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+<!DOCTYPE html>
+<html>
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+    <title>Follow</title>
+  </head>
+  <body>
+    <div id="boot">Booting...</div>
+    <div id="results"></div>
+    <div><pre><code id="con"></code></pre></div>
+    <script src="jquery-1.6.1.min.js"></script>
+    <script data-main="boot.js" src="require.js"></script>
+  </body>
+</html>