pypa · dstufft · Aug 4, 2014 · Aug 1, 2014
diff --git a/CHANGES.txt b/CHANGES.txt
@@ -14,10 +14,6 @@
   until their removal in pip v1.8. For more information please see
   https://pip.pypa.io/en/latest/reference/pip_install.html#caching
 
-* Removed the deprecated support for dependency links and the
-  ``--process-dependency-links`` flag that turned them on. For alternatives to
-  dependency links please see http://www.pip-installer.org/en/latest/dependency_links.html
-
 * `wsgiref` and `argparse` (for >py26) are now excluded from `pip list` and `pip
   freeze` (:pull:`1606`, :pull:`1369`)
 
@@ -167,9 +163,6 @@
 * **BACKWARD INCOMPATIBLE** pip no longer respects dependency links by default.
   Users may opt into respecting them again using ``--process-dependency-links``.
 
-* **DEPRECATION** ``pip install --process-dependency-links`` and the ability to
-  use dependency links at all has been deprecated and will be removed in 1.6.
-
 * **DEPRECATION** ``pip install --no-install`` and ``pip install
   --no-download`` are now formally deprecated.  See :issue:`906` for discussion on
   possible alternatives, or lack thereof, in future releases.

diff --git a/docs/dependency_links.rst b/docs/dependency_links.rst
diff --git a/pip/__init__.py b/pip/__init__.py
@@ -199,7 +199,7 @@ def __init__(self, name, req, editable, comments=()):
     _date_re = re.compile(r'-(20\d\d\d\d\d\d)$')
 
     @classmethod
-    def from_dist(cls, dist, find_tags=False):
+    def from_dist(cls, dist, dependency_links, find_tags=False):
         location = os.path.normcase(os.path.abspath(dist.location))
         comments = []
         from pip.vcs import vcs, get_src_requirement
@@ -227,7 +227,38 @@ def from_dist(cls, dist, find_tags=False):
             req = dist.as_requirement()
             specs = req.specs
             assert len(specs) == 1 and specs[0][0] == '=='
-
+            version = specs[0][1]
+            ver_match = cls._rev_re.search(version)
+            date_match = cls._date_re.search(version)
+            if ver_match or date_match:
+                svn_backend = vcs.get_backend('svn')
+                if svn_backend:
+                    svn_location = svn_backend().get_location(
+                        dist,
+                        dependency_links,
+                    )
+                if not svn_location:
+                    logger.warn(
+                        'Warning: cannot find svn location for %s' % req)
+                    comments.append(
+                        '## FIXME: could not find svn URL in dependency_links '
+                        'for this package:'
+                    )
+                else:
+                    comments.append(
+                        '# Installing as editable to satisfy requirement %s:' %
+                        req
+                    )
+                    if ver_match:
+                        rev = ver_match.group(1)
+                    else:
+                        rev = '{%s}' % date_match.group(1)
+                    editable = True
+                    req = '%s@%s#egg=%s' % (
+                        svn_location,
+                        rev,
+                        cls.egg_name(dist)
+                    )
         return cls(dist.project_name, req, editable, comments)
 
     @staticmethod

diff --git a/pip/cmdoptions.py b/pip/cmdoptions.py
@@ -279,6 +279,15 @@ def make(self):
     help=SUPPRESS_HELP
 )
 
+# Remove after 1.5
+process_dependency_links = OptionMaker(
+    "--process-dependency-links",
+    dest="process_dependency_links",
+    action="store_true",
+    default=False,
+    help="Enable the processing of dependency links.",
+)
+
 requirements = OptionMaker(
     '-r', '--requirement',
     dest='requirements',
@@ -431,5 +440,6 @@ def make(self):
         no_allow_external,
         allow_unsafe,
         no_allow_unsafe,
+        process_dependency_links,
     ]
 }
diff --git a/pip/commands/freeze.py b/pip/commands/freeze.py
@@ -7,6 +7,7 @@
 from pip.log import logger
 from pip.basecommand import Command
 from pip.util import get_installed_distributions
+from pip._vendor import pkg_resources
 
 # packages to exclude from freeze output
 freeze_excludes = stdlib_pkgs + ['setuptools', 'pip', 'distribute']
@@ -67,14 +68,28 @@ def run(self, options, args):
         if skip_regex:
             skip_match = re.compile(skip_regex)
 
+        dependency_links = []
+
         f = sys.stdout
 
+        for dist in pkg_resources.working_set:
+            if dist.has_metadata('dependency_links.txt'):
+                dependency_links.extend(
+                    dist.get_metadata_lines('dependency_links.txt')
+                )
+        for link in find_links:
+            if '#egg=' in link:
+                dependency_links.append(link)
         for link in find_links:
             f.write('-f %s\n' % link)
         installations = {}
         for dist in get_installed_distributions(local_only=local_only,
                                                 skip=freeze_excludes):
-            req = pip.FrozenRequirement.from_dist(dist, find_tags=find_tags)
+            req = pip.FrozenRequirement.from_dist(
+                dist,
+                dependency_links,
+                find_tags=find_tags,
+            )
             installations[req.name] = req
         if requirement:
             req_f = open(requirement)

diff --git a/pip/commands/install.py b/pip/commands/install.py
@@ -180,6 +180,7 @@ def _build_package_finder(self, options, index_urls, session):
             allow_unverified=options.allow_unverified,
             allow_all_external=options.allow_all_external,
             allow_all_prereleases=options.pre,
+            process_dependency_links=options.process_dependency_links,
             session=session,
         )
 

diff --git a/pip/commands/list.py b/pip/commands/list.py
@@ -70,6 +70,7 @@ def _build_package_finder(self, options, index_urls, session):
             allow_unverified=options.allow_unverified,
             allow_all_external=options.allow_all_external,
             allow_all_prereleases=options.pre,
+            process_dependency_links=options.process_dependency_links,
             session=session,
         )
 
@@ -115,8 +116,16 @@ def find_packages_latests_versions(self, options):
             )
             index_urls += options.mirrors
 
+        dependency_links = []
+        for dist in get_installed_distributions(local_only=options.local):
+            if dist.has_metadata('dependency_links.txt'):
+                dependency_links.extend(
+                    dist.get_metadata_lines('dependency_links.txt'),
+                )
+
         with self._build_session(options) as session:
             finder = self._build_package_finder(options, index_urls, session)
+            finder.add_dependency_links(dependency_links)
 
             installed_packages = get_installed_distributions(
                 local_only=options.local,

diff --git a/pip/commands/wheel.py b/pip/commands/wheel.py
@@ -162,6 +162,7 @@ def run(self, options, args):
                 allow_unverified=options.allow_unverified,
                 allow_all_external=options.allow_all_external,
                 allow_all_prereleases=options.pre,
+                process_dependency_links=options.process_dependency_links,
                 session=session,
             )
 

diff --git a/pip/index.py b/pip/index.py
@@ -38,7 +38,7 @@ class PackageFinder(object):
     def __init__(self, find_links, index_urls,
                  use_wheel=True, allow_external=[], allow_unverified=[],
                  allow_all_external=False, allow_all_prereleases=False,
-                 session=None):
+                 process_dependency_links=False, session=None):
         if session is None:
             raise TypeError(
                 "PackageFinder() missing 1 required keyword argument: "
@@ -47,6 +47,7 @@ def __init__(self, find_links, index_urls,
 
         self.find_links = find_links
         self.index_urls = index_urls
+        self.dependency_links = []
 
         # These are boring links that have already been logged somehow:
         self.logged_links = set()
@@ -78,9 +79,28 @@ def __init__(self, find_links, index_urls,
         # Do we want to allow _all_ pre-releases?
         self.allow_all_prereleases = allow_all_prereleases
 
+        # Do we process dependency links?
+        self.process_dependency_links = process_dependency_links
+        self._have_warned_dependency_links = False
+
         # The Session we'll use to make requests
         self.session = session
 
+    def add_dependency_links(self, links):
+        # # FIXME: this shouldn't be global list this, it should only
+        # # apply to requirements of the package that specifies the
+        # # dependency_links value
+        # # FIXME: also, we should track comes_from (i.e., use Link)
+        if self.process_dependency_links:
+            if not self._have_warned_dependency_links:
+                logger.deprecated(
+                    "1.6",
+                    "Dependency Links processing has been deprecated with an "
+                    "accelerated time schedule and will be removed in pip 1.6",
+                )
+                self._have_warned_dependency_links = True
+            self.dependency_links.extend(links)
+
     def _sort_locations(self, locations):
         """
         Sort locations into "files" (archives) and "urls", and return
@@ -207,11 +227,16 @@ def mkurl_pypi_url(url):
                     posixpath.join(main_index_url.url, version)] + locations
 
         file_locations, url_locations = self._sort_locations(locations)
+        _flocations, _ulocations = self._sort_locations(self.dependency_links)
+        file_locations.extend(_flocations)
 
         # We trust every url that the user has given us whether it was given
         #   via --index-url or --find-links
         locations = [Link(url, trusted=True) for url in url_locations]
 
+        # We explicitly do not trust links that came from dependency_links
+        locations.extend([Link(url) for url in _ulocations])
+
         logger.debug('URLs to search for versions for %s:' % req)
         for location in locations:
             logger.debug('* %s' % location)
@@ -260,6 +285,15 @@ def mkurl_pypi_url(url):
                 )
             finally:
                 logger.indent -= 2
+        dependency_versions = list(self._package_versions(
+            [Link(url) for url in self.dependency_links], req.name.lower()))
+        if dependency_versions:
+            logger.info(
+                'dependency_links found: %s' %
+                ', '.join([
+                    link.url for p, link, version in dependency_versions
+                ])
+            )
         file_versions = list(
             self._package_versions(
                 [Link(url) for url in file_locations],
@@ -268,6 +302,7 @@ def mkurl_pypi_url(url):
         )
         if (not found_versions
                 and not page_versions
+                and not dependency_versions
                 and not file_versions):
             logger.fatal(
                 'Could not find any downloads that satisfy the requirement'
@@ -307,7 +342,7 @@ def mkurl_pypi_url(url):
             )
         # this is an intentional priority ordering
         all_versions = installed_version + file_versions + found_versions \
-            + page_versions
+            + page_versions + dependency_versions
         applicable_versions = []
         for (parsed_version, link, version) in all_versions:
             if version not in req.req:

diff --git a/pip/req/req_install.py b/pip/req/req_install.py
@@ -448,6 +448,10 @@ def pkg_info(self):
         p.feed(data or '')
         return p.close()
 
+    @property
+    def dependency_links(self):
+        return self.egg_info_lines('dependency_links.txt')
+
     _requirements_section_re = re.compile(r'\[(.*?)\]')
 
     def requirements(self, extras=()):

diff --git a/pip/req/req_set.py b/pip/req/req_set.py
@@ -425,6 +425,10 @@ def prepare_files(self, finder):
 
                 # sdists
                 else:
+                    # FIXME: shouldn't be globally added:
+                    finder.add_dependency_links(
+                        req_to_install.dependency_links
+                    )
                     if (req_to_install.extras):
                         logger.notify(
                             "Installing extra requirements: %r" %

diff --git a/pip/vcs/subversion.py b/pip/vcs/subversion.py
@@ -1,6 +1,8 @@
 import os
 import re
+
 from pip.compat import urlparse
+from pip.index import Link
 from pip.util import rmtree, display_path, call_subprocess
 from pip.log import logger
 from pip.vcs import vcs, VersionControl
@@ -34,6 +36,7 @@ def get_info(self, location):
                 'Cannot determine URL of svn checkout %s' %
                 display_path(location)
             )
+            logger.info('Output that cannot be parsed: \n%s' % output)
             return None, None
         url = match.group(1).strip()
         match = _svn_revision_re.search(output)
@@ -84,6 +87,20 @@ def obtain(self, dest):
             call_subprocess(
                 [self.cmd, 'checkout', '-q'] + rev_options + [url, dest])
 
+    def get_location(self, dist, dependency_links):
+        for url in dependency_links:
+            egg_fragment = Link(url).egg_fragment
+            if not egg_fragment:
+                continue
+            if '-' in egg_fragment:
+                # FIXME: will this work when a package has - in the name?
+                key = '-'.join(egg_fragment.split('-')[:-1]).lower()
+            else:
+                key = egg_fragment
+            if key == dist.key:
+                return url.split('#', 1)[0]
+        return None
+
     def get_revision(self, location):
         """
         Return the maximum revision for all files under a given location

diff --git a/tests/data/packages/LocalExtras/.gitignore b/tests/data/packages/LocalExtras/.gitignore
@@ -0,0 +1 @@
+/LocalExtras.egg-info
diff --git a/tests/data/packages/LocalExtras/localextras/__init__.py b/tests/data/packages/LocalExtras/localextras/__init__.py