Added support for saving the generated source maps in separate files.

README.md

@@ -33,7 +33,8 @@ Install globally via npm:
       -h, --help           output usage information
       -V, --version        output the version number
       -b, --bare           compile without a top-level function wrapper
-      -M, --map            create source maps
+      -M, --map            create source maps, appended to the JS file
+      -x, --extmap         create source maps, shipped in a separate file
       -m, --minify         minify output files
       -o, --output <path>  output path
       -s, --silent         suppress console output
@@ -69,7 +70,8 @@ Compiles all .coffee files found in `inputPaths`, which can be a single string o
 * `minify` - Minify output files. Defaults to false.
 * `output` - The path to the output file. If the path has a file extension, all files will be joined at that location. Otherwise, the path is assumed to be a directory.
 * `silent` - Suppress all console output. Defaults to true.
-* `sourceMap` - Generate source maps for output files. Not currentl compatible with minification. Defaults to false.
+* `sourceMap` - Generate source maps for output files, and append them to the JS. Not currentl compatible with minification. Defaults to false.
+* `extSourceMap` - Generate source maps for output files, and save them in saparate files. Not currentl compatible with minification. Defaults to false.
 * `watch` - (boolean) Watch all files and directories for changes and recompile automatically. Defaults to false.
 
 ##### Example:

src/coffeebar.coffee

@@ -40,8 +40,11 @@ class Coffeebar
     @options.watch ?= false
     @options.silent ?= true
     @options.minify ?= false
+    @options.extSourceMap ?= false
+    @options.extSourceMap = false if @options.minify
     @options.sourceMap ?= false
     @options.sourceMap = false if @options.minify
+    @options.sourceMap = @options.sourceMap or @options.extSourceMap
     @options.join = true if @options.output and path.extname(@options.output)
 
     @options.bare ?= false
@@ -59,6 +62,7 @@ class Coffeebar
     unless Array.isArray(@inputPaths) then @inputPaths = [@inputPaths]
 
     for inputPath, i in @inputPaths
+      @inputPaths[i] = inputPath = path.normalize inputPath
       unless path.extname(inputPath)
         @inputPaths[i] = "#{inputPath}/**/*.{#{exts}}"
 
@@ -115,15 +119,21 @@ class Coffeebar
   # src file that we sent to the compiler.
   mapSources: ->
     unless @options.join
-      source.writeMapComment() for source in @sources 
+      unless @options.extSourceMap
+        source.writeMapComment() for source in @sources
+      else
+        source.writeMapCommentExt() for source in @sources
       return
 
     return unless @outputs[0].sourceMap
     smOld = new sourcemap.SourceMapConsumer @outputs[0].sourceMap
-    smNew = new sourcemap.SourceMapGenerator {file: smOld.file, sourceRoot: "#{path.basename(@options.output, '.js')}_mapsrc"}
+    smNew = new sourcemap.SourceMapGenerator {file: (path.basename smOld.file), sourceRoot: "#{path.basename(@options.output, '.js')}_mapsrc"}
     smOld.eachMapping (map) => smNew.addMapping(@offsetMapping map)
 
-    @outputs[0].writeMapComment smNew.toString()
+    unless @options.extSourceMap
+      @outputs[0].writeMapComment smNew.toString()
+    else
+      @outputs[0].writeMapCommentExt smNew.toString()
 
   # After compilation, report each error that was logged. In the event
   # that this is a joined output file, use the line number offset to

src/command.coffee

@@ -15,7 +15,8 @@ module.exports.run =  ->
     .usage('[options] [path ...]')
     .option('-b, --bare', 'compile without a top-level function wrapper')
     .option('-m, --minify', 'minify output files')
-    .option('-M, --map', 'create source maps')
+    .option('-M, --map', 'create source maps, appended to the JS file')
+    .option('-x, --extmap', 'create source maps, shipped in a separate file')
     .option('-o, --output <path>', 'output path')
     .option('-s, --silent', 'suppress console output')
     .option('-w, --watch', 'watch files for changes')
@@ -28,6 +29,7 @@ module.exports.run =  ->
       silent    : program.silent || false
       minify    : program.minify
       sourceMap : program.map
+      extSourceMap : program.extmap
       bare      : program.bare
 
     console.log '' unless options.silent

src/source.coffee

@@ -96,6 +96,16 @@ class Source
     commentMap = "//@ sourceMappingURL=data:application/json;base64,#{commentMap}"
     @compiled = "#{@compiled}\n#{commentMap}"
 
+  # Save the source map to an external file.
+  writeMapCommentExt: (map) ->
+    mkdirp.sync path.dirname @outputPath
+    mapOutput = @outputPath.replace '.js', '.map'
+    map or= JSON.stringify @sourceMap
+    fs.writeFileSync mapOutput, map, 'utf8'
+    mapName = path.basename mapOutput
+    commentMap = "//@ sourceMappingURL=#{mapName}"
+    @compiled = "#{@compiled}\n#{commentMap}"
+
   # Utilities
   # ---------