Watch Mode refactor

Author: lavrton

CoffeeScript.py

@@ -0,0 +1,43 @@
+"""
+sourcemap
+~~~~~~~~~
+
+:copyright: (c) 2013 by Matt Robenolt
+:license: BSD, see LICENSE for more details.
+"""
+from .exceptions import SourceMapDecodeError  #NOQA
+from .decoder import SourceMapDecoder
+
+__version__ = '0.1.7'
+
+
+def load(fp, cls=None):
+    "Parse a sourcemap from a file-like object"
+    return loads(fp.read(), cls)
+
+
+def loads(source, cls=None):
+    "Parse a sourcemap from a string"
+    cls = cls or SourceMapDecoder
+    return cls().decode(source)
+
+
+def discover(source):
+    "Given a JavaScript file, find the sourceMappingURL line"
+    source = source.splitlines()
+    # Source maps are only going to exist at either the top or bottom of the document.
+    # Technically, there isn't anything indicating *where* it should exist, so we
+    # are generous and assume it's somewhere either in the first or last 5 lines.
+    # If it's somewhere else in the document, you're probably doing it wrong.
+    if len(source) > 10:
+        possibilities = source[:5] + source[-5:]
+    else:
+        possibilities = source
+
+    for line in set(possibilities):
+        pragma = line[:21]
+        if pragma == '//# sourceMappingURL=' or pragma == '//@ sourceMappingURL=':
+            # We want everything AFTER the pragma, which is 21 chars long
+            return line[21:].rstrip()
+    # XXX: Return None or raise an exception?
+    return None