fix: compatability with pip v10.0.0

.travis.yml

@@ -8,6 +8,9 @@ node_js:
   - "6"
   - "4"
   - "0.12"
+env:
+  - PIP_VER=9.0.3
+  - PIP_VER=10.0.0
 cache:
   directories:
     - node_modules
@@ -16,6 +19,7 @@ before_script:
   - pip install virtualenv --user `whoami`
   - virtualenv ./env
   - source ./env/bin/activate
+  - pip install pip==$PIP_VER
 script: npm test
 jobs:
   include:

plug/pip_resolve.py

@@ -3,10 +3,16 @@
 import json
 import re
 import argparse
-import pip
 import utils
 import requirements
 
+# pip >= 10.0.0 moved all APIs to the _internal package reflecting the fact
+# that pip does not currently have any public APIs. This is a temporary fix.
+# TODO: We need a workaround to using the get_installed_distributions method.
+try:
+    from pip import get_installed_distributions
+except ImportError:
+    from pip._internal import get_installed_distributions
 
 def create_tree_of_packages_dependencies(dist_tree, packages_names, req_file_path, allow_missing=False):
     """Create packages dependencies tree
@@ -119,7 +125,7 @@ def get_requirements_list(requirements_file):
 
 def create_dependencies_tree_by_req_file_path(requirements_file_path, allow_missing=False):
     # get all installed packages
-    pkgs = pip.get_installed_distributions(local_only=False, skip=[])
+    pkgs = get_installed_distributions(local_only=False, skip=[])
 
     # get all installed packages's distribution object
     dist_index = utils.build_dist_index(pkgs)

test/workspaces/pip-app-with-options/requirements.txt

@@ -1,4 +1,4 @@
---allow-external=nose
+--require-hashes
 MarkupSafe==1.0 --hash=sha256:a6be69091dac236ea9c6bc7d012beab42010fa914c459791d627dad4910eb665 \
     --hash=sha256:abcd \
     --hash=sha256:0123 # a comment