From 116021cba89aa955869fec102a4d50d728501f22 Mon Sep 17 00:00:00 2001
From: "Jason R. Coombs" <jaraco@jaraco.com>
Date: Tue, 26 Jan 2016 22:32:46 -0500
Subject: Experimental re-write using rwt

---
 ptr.py | 103 +++++++++++++++++++++++++----------------------------------------
 1 file changed, 39 insertions(+), 64 deletions(-)

diff --git a/ptr.py b/ptr.py
index 5c5287e..b0bfe85 100644
--- a/ptr.py
+++ b/ptr.py
@@ -2,13 +2,13 @@
 Implementation
 """
 
-import os as _os
 import shlex as _shlex
 import contextlib as _contextlib
 import sys as _sys
+import itertools as _itertools
+import distutils.cmd as _cmd
 
-import pkg_resources
-import setuptools.command.test as orig
+import rwt.deps
 
 
 @_contextlib.contextmanager
@@ -22,7 +22,26 @@ def _save_argv(repl=None):
 		_sys.argv[:] = saved
 
 
-class PyTest(orig.test):
+class Extra(list):
+	def __init__(self, item):
+		spec, reqs = item
+		self.name, sep, self.marker = spec.partition(':')
+		super(Extra, self).__init__(reqs)
+
+	def __bool__(self):
+		return bool(self.name)
+
+	def __iter__(self):
+		"""
+		Move markers onto each of the requirements.
+		"""
+		for req in super(Extra, self).__iter__():
+			if self.marker:
+				req += ';' + self.marker
+			yield req
+
+
+class PyTest(_cmd.Command):
 	user_options = [
 		('extras', None, "Install (all) setuptools extras when running tests"),
 		('index-url=', None, "Specify an index url from which to retrieve "
@@ -43,79 +62,35 @@ class PyTest(orig.test):
 		if self.addopts:
 			self.addopts = _shlex.split(self.addopts)
 
-	@staticmethod
-	def marker_passes(marker):
-		"""
-		Given an environment marker, return True if the marker is valid
-		and matches this environment.
-		"""
-		return (
-			marker
-			and not pkg_resources.invalid_marker(marker)
-			and pkg_resources.evaluate_marker(marker)
-		)
+	def iter_extras(self):
+		return map(Extra, self.distribution.extras_require.items())
 
 	def run(self):
 		"""
 		Override run to ensure requirements are available in this session (but
 		don't install them anywhere).
 		"""
-		self._build_egg_fetcher()
-		if self.distribution.install_requires:
-			self.distribution.fetch_build_eggs(self.distribution.install_requires)
-		if self.distribution.tests_require:
-			self.distribution.fetch_build_eggs(self.distribution.tests_require)
-		extras_require = self.distribution.extras_require or {}
-		for spec, reqs in extras_require.items():
-			name, sep, marker = spec.partition(':')
-			if marker and not self.marker_passes(marker):
-				continue
-			# always include unnamed extras
-			if not name or self.extras:
-				self.distribution.fetch_build_eggs(reqs)
+		named_extras = (x for x in self.iter_extras() if x.name)
+		unnamed_extras = (x for x in self.iter_extras() if not x.name)
+		flatten = _itertools.chain.from_iterable
+		reqs = set(_itertools.chain(
+			self.distribution.install_requires,
+			self.distribution.tests_require,
+			flatten(unnamed_extras),
+			flatten(named_extras) if self.extras else (),
+		))
 		if self.dry_run:
 			self.announce('skipping tests (dry run)')
+			list(reqs)
 			return
-		self.with_project_on_sys_path(self.run_tests)
+
+		with rwt.deps.on_sys_path(*reqs):
+			self.run_tests()
+
 		if self.result_code:
 			raise SystemExit(self.result_code)
 		return self.result_code
 
-	def _build_egg_fetcher(self):
-		"""Build an egg fetcher that respects index_url and allow_hosts"""
-		# modified from setuptools.dist:Distribution.fetch_build_egg
-		from setuptools.command.easy_install import easy_install
-		main_dist = self.distribution
-		# construct a fake distribution to store the args for easy_install
-		dist = main_dist.__class__({'script_args': ['easy_install']})
-		dist.parse_config_files()
-		opts = dist.get_option_dict('easy_install')
-		keep = (
-			'find_links', 'site_dirs', 'index_url', 'optimize',
-			'site_dirs', 'allow_hosts'
-		)
-		for key in opts.keys():
-			if key not in keep:
-				del opts[key]   # don't use any other settings
-		if main_dist.dependency_links:
-			links = main_dist.dependency_links[:]
-			if 'find_links' in opts:
-				links = opts['find_links'][1].split() + links
-			opts['find_links'] = ('setup', links)
-		if self.allow_hosts:
-			opts['allow_hosts'] = ('test', self.allow_hosts)
-		if self.index_url:
-			opts['index_url'] = ('test', self.index_url)
-		install_dir_func = getattr(dist, 'get_egg_cache_dir', _os.getcwd)
-		install_dir = install_dir_func()
-		cmd = easy_install(
-			dist, args=["x"], install_dir=install_dir, exclude_scripts=True,
-			always_copy=False, build_directory=None, editable=False,
-			upgrade=False, multi_version=True, no_report = True
-		)
-		cmd.ensure_finalized()
-		main_dist._egg_fetcher = cmd
-
 	def run_tests(self):
 		"""
 		Invoke pytest, replacing argv.
-- 
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