Install the "express" node module via npm

[obsolete/notmuch-web] / node_modules / express / node_modules / connect / lib / middleware / compiler.js

diff --git a/node_modules/express/node_modules/connect/lib/middleware/compiler.js b/node_modules/express/node_modules/connect/lib/middleware/compiler.js
new file mode 100644 (file)
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+++ b/node_modules/express/node_modules/connect/lib/middleware/compiler.js
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+
+/*!
+ * Connect - compiler
+ * Copyright(c) 2010 Sencha Inc.
+ * Copyright(c) 2011 TJ Holowaychuk
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var fs = require('fs')
+  , path = require('path')
+  , parse = require('url').parse;
+
+/**
+ * Require cache.
+ */
+
+var cache = {};
+
+/**
+ * Setup compiler.
+ *
+ * Options:
+ *
+ *   - `src`     Source directory, defaults to **CWD**.
+ *   - `dest`    Destination directory, defaults `src`.
+ *   - `enable`  Array of enabled compilers.
+ *
+ * Compilers:
+ *
+ *   - `sass`   Compiles cass to css
+ *   - `less`   Compiles less to css
+ *   - `coffeescript`   Compiles coffee to js
+ *
+ * @param {Object} options
+ * @api public
+ */
+
+exports = module.exports = function compiler(options){
+  options = options || {};
+
+  var srcDir = options.src || process.cwd()
+    , destDir = options.dest || srcDir
+    , enable = options.enable;
+
+  if (!enable || enable.length === 0) {
+    throw new Error('compiler\'s "enable" option is not set, nothing will be compiled.');
+  }
+
+  return function compiler(req, res, next){
+    if ('GET' != req.method) return next();
+    var pathname = parse(req.url).pathname;
+    for (var i = 0, len = enable.length; i < len; ++i) {
+      var name = enable[i]
+        , compiler = compilers[name];
+      if (compiler.match.test(pathname)) {
+        var src = (srcDir + pathname).replace(compiler.match, compiler.ext)
+          , dest = destDir + pathname;
+
+        // Compare mtimes
+        fs.stat(src, function(err, srcStats){
+          if (err) {
+            if ('ENOENT' == err.code) {
+              next();
+            } else {
+              next(err);
+            }
+          } else {
+            fs.stat(dest, function(err, destStats){
+              if (err) {
+                // Oh snap! it does not exist, compile it
+                if ('ENOENT' == err.code) {
+                  compile();
+                } else {
+                  next(err);
+                }
+              } else {
+                // Source has changed, compile it
+                if (srcStats.mtime > destStats.mtime) {
+                  compile();
+                } else {
+                  // Defer file serving
+                  next();
+                }
+              }
+            });
+          }
+        });
+
+        // Compile to the destination
+        function compile() {
+          fs.readFile(src, 'utf8', function(err, str){
+            if (err) {
+              next(err);
+            } else {
+              compiler.compile(str, function(err, str){
+                if (err) {
+                  next(err);
+                } else {
+                  fs.writeFile(dest, str, 'utf8', function(err){
+                    next(err);
+                  });
+                }
+              });
+            }
+          });
+        }
+        return;
+      }
+    }
+    next();
+  };
+};
+
+/**
+ * Bundled compilers:
+ *
+ *  - [sass](http://github.com/visionmedia/sass.js) to _css_
+ *  - [less](http://github.com/cloudhead/less.js) to _css_
+ *  - [coffee](http://github.com/jashkenas/coffee-script) to _js_
+ */
+
+var compilers = exports.compilers = {
+  sass: {
+    match: /\.css$/,
+    ext: '.sass',
+    compile: function(str, fn){
+      var sass = cache.sass || (cache.sass = require('sass'));
+      try {
+        fn(null, sass.render(str));
+      } catch (err) {
+        fn(err);
+      }
+    }
+  },
+  less: {
+    match: /\.css$/,
+    ext: '.less',
+    compile: function(str, fn){
+      var less = cache.less || (cache.less = require('less'));
+      try {
+        less.render(str, fn);
+      } catch (err) {
+        fn(err);
+      }
+    }
+  },
+  coffeescript: {
+    match: /\.js$/,
+    ext: '.coffee',
+    compile: function(str, fn){
+      var coffee = cache.coffee || (cache.coffee = require('coffee-script'));
+      try {
+        fn(null, coffee.compile(str));
+      } catch (err) {
+        fn(err);
+      }
+    }
+  }
+};
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