--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/venv/lib/python2.7/site-packages/pip/req/req_file.py	Mon Oct 12 17:43:33 2015 -0400
@@ -0,0 +1,137 @@
+from __future__ import absolute_import
+
+import os
+import re
+
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip.download import get_file_content
+from pip.req.req_install import InstallRequirement
+from pip.utils import normalize_name
+
+_scheme_re = re.compile(r'^(http|https|file):', re.I)
+
+
+def _remove_prefixes(line, short_prefix, long_prefix):
+    if line.startswith(short_prefix):
+        return line[len(short_prefix):].lstrip()
+    else:
+        return _remove_prefix(line, long_prefix)
+
+
+def _remove_prefix(line, prefix):
+    """Remove the prefix and eventually one '=' or spaces"""
+    return re.sub(r'\s*=?\s*', '', line[len(prefix):])
+
+
+def parse_requirements(filename, finder=None, comes_from=None, options=None,
+                       session=None):
+    if session is None:
+        raise TypeError(
+            "parse_requirements() missing 1 required keyword argument: "
+            "'session'"
+        )
+
+    skip_match = None
+    skip_regex = options.skip_requirements_regex if options else None
+    if skip_regex:
+        skip_match = re.compile(skip_regex)
+    reqs_file_dir = os.path.dirname(os.path.abspath(filename))
+    filename, content = get_file_content(
+        filename,
+        comes_from=comes_from,
+        session=session,
+    )
+    for line_number, line in enumerate(content.splitlines(), 1):
+        line = line.strip()
+
+        # Remove comments from file and all spaces before it
+        line = re.sub(r"(^|\s)+#.*$", "", line)
+
+        if not line:
+            continue
+        if skip_match and skip_match.search(line):
+            continue
+        if line.startswith(('-r', '--requirement')):
+            req_url = _remove_prefixes(line, '-r', '--requirement')
+            if _scheme_re.search(filename):
+                # Relative to a URL
+                req_url = urllib_parse.urljoin(filename, req_url)
+            elif not _scheme_re.search(req_url):
+                req_url = os.path.join(os.path.dirname(filename), req_url)
+            for item in parse_requirements(
+                    req_url, finder,
+                    comes_from=filename,
+                    options=options,
+                    session=session):
+                yield item
+        elif line.startswith(('-Z', '--always-unzip')):
+            # No longer used, but previously these were used in
+            # requirement files, so we'll ignore.
+            pass
+        elif line.startswith(('-f', '--find-links')):
+            find_links = _remove_prefixes(line, '-f', '--find-links')
+            # FIXME: it would be nice to keep track of the source of
+            # the find_links:
+            # support a find-links local path relative to a requirements file
+            relative_to_reqs_file = os.path.join(reqs_file_dir, find_links)
+            if os.path.exists(relative_to_reqs_file):
+                find_links = relative_to_reqs_file
+            if finder:
+                finder.find_links.append(find_links)
+        elif line.startswith(('-i', '--index-url')):
+            index_url = _remove_prefixes(line, '-i', '--index-url')
+            if finder:
+                finder.index_urls = [index_url]
+        elif line.startswith('--extra-index-url'):
+            line = _remove_prefix(line, '--extra-index-url')
+            if finder:
+                finder.index_urls.append(line)
+        elif line.startswith('--use-wheel'):
+            # Default in 1.5
+            pass
+        elif line.startswith('--no-use-wheel'):
+            if finder:
+                finder.use_wheel = False
+        elif line.startswith('--no-index'):
+            if finder:
+                finder.index_urls = []
+        elif line.startswith("--allow-external"):
+            line = _remove_prefix(line, '--allow-external')
+            if finder:
+                finder.allow_external |= set([normalize_name(line).lower()])
+        elif line.startswith("--allow-all-external"):
+            if finder:
+                finder.allow_all_external = True
+        # Remove in 7.0
+        elif line.startswith("--no-allow-external"):
+            pass
+        # Remove in 7.0
+        elif line.startswith("--no-allow-insecure"):
+            pass
+        # Remove after 7.0
+        elif line.startswith("--allow-insecure"):
+            line = _remove_prefix(line, '--allow-insecure')
+            if finder:
+                finder.allow_unverified |= set([normalize_name(line).lower()])
+        elif line.startswith("--allow-unverified"):
+            line = _remove_prefix(line, '--allow-unverified')
+            if finder:
+                finder.allow_unverified |= set([normalize_name(line).lower()])
+        else:
+            comes_from = '-r %s (line %s)' % (filename, line_number)
+            if line.startswith(('-e', '--editable')):
+                editable = _remove_prefixes(line, '-e', '--editable')
+                req = InstallRequirement.from_editable(
+                    editable,
+                    comes_from=comes_from,
+                    default_vcs=options.default_vcs if options else None,
+                    isolated=options.isolated_mode if options else False,
+                )
+            else:
+                req = InstallRequirement.from_line(
+                    line,
+                    comes_from,
+                    isolated=options.isolated_mode if options else False,
+                )
+            yield req