Strip markers from test requirements.

Setuptools doesn't [yet] support markeres in tests_require parameters
to setup(). While we need to get that fixed, we also need to support
syncing marker constrained requirements from global-requirements.

Since version constraints are needed to successfully port to Python3
this won't be a long term viable solution: but few of our test-only
dependencies require version constraints, so we can do this in the
interim. The ones that do - such as python-mysql - we're either
moving away from, or centralising them into optional dependencies
on other packages where the tests_require limitation shouldn't apply.

Change-Id: I31adaf35c8d7b72fe3f8c9242cc356fe34d537e8

pbr/hooks/backwards.py

@@ -29,4 +29,5 @@ class BackwardsCompatConfig(base.BaseConfig):
         packaging.append_text_list(
             self.config, 'tests_require',
             packaging.parse_requirements(
-                packaging.TEST_REQUIREMENTS_FILES))
+                packaging.TEST_REQUIREMENTS_FILES,
+                strip_markers=True))

pbr/packaging.py

@@ -81,7 +81,7 @@ def get_reqs_from_files(requirements_files):
     return []
 
 
-def parse_requirements(requirements_files=None):
+def parse_requirements(requirements_files=None, strip_markers=False):
 
     if requirements_files is None:
         requirements_files = get_requirements_files()
@@ -104,7 +104,8 @@ def parse_requirements(requirements_files=None):
         # -r other-requirements.txt
         if line.startswith('-r'):
             req_file = line.partition(' ')[2]
-            requirements += parse_requirements([req_file])
+            requirements += parse_requirements(
+                [req_file], strip_markers=strip_markers)
             continue
 
         try:
@@ -130,6 +131,11 @@ def parse_requirements(requirements_files=None):
             reason = 'Index Location'
 
         if line is not None:
+            if strip_markers:
+                semi_pos = line.find(';')
+                if semi_pos < 0:
+                    semi_pos = None
+                line = line[:semi_pos]
             requirements.append(line)
         else:
             log.info(

pbr/tests/testpackage/test-requirements.txt

@@ -0,0 +1 @@
+ordereddict;python_version=='2.6'