Merge pull request #190 from RobertPaul01/sort

Adds :sort feature

lib/ex.coffee

@@ -442,4 +442,24 @@ class Ex
             throw new CommandError("No such option: #{option}")
           optionProcessor()
 
+  sort: ({ range }) =>
+    editor = atom.workspace.getActiveTextEditor()
+    sortingRange = [[]]
+
+    # If no range is provided, the entire file should be sorted.
+    isMultiLine = range[1] - range[0] > 1
+    if isMultiLine
+      sortingRange = [[range[0], 0], [range[1] + 1, 0]]
+    else
+      sortingRange = [[0, 0], [editor.getLastBufferRow(), 0]]
+
+    # Store every bufferedRow string in an array.
+    textLines = []
+    for lineIndex in [sortingRange[0][0]..sortingRange[1][0] - 1]
+      textLines.push(editor.lineTextForBufferRow(lineIndex))
+
+    # Sort the array and join them together with newlines for writing back to the file.
+    sortedText = _.sortBy(textLines).join('\n') + '\n'
+    editor.buffer.setTextInRange(sortingRange, sortedText)
+
 module.exports = Ex