bugfix: some jenkins builds not honoring virtualenv setup.

makefile

@@ -1,5 +1,5 @@
 test:
-	./uranium/scripts/uranium_standalone --uranium-dir=. test ${ARGS} -v -sx
+	./uranium/scripts/uranium_standalone --uranium-dir=. test ${ARGS} -v -x
 
 build:
 	./uranium/scripts/uranium_standalone --uranium-dir=.

tests/test_packages_full.py

@@ -122,3 +122,33 @@ def main(build):
     print("stdout:\n" + str(out))
     print("stderr:\n" + str(err))
     assert code == 0
+
+
+def test_executable_relocatable_after_install(tmpdir):
+    """
+    an executable installed from a package should be
+    using the virtualenv relocatable version.
+    """
+
+    UBUILD = """
+import os
+
+def main(build):
+
+    build.packages.install("tox")
+    nose_path = os.path.join(build.root, "bin", "tox")
+    with open(nose_path) as fh:
+        contents = fh.read()
+    print(contents)
+    assert build.root not in contents
+""".strip()
+
+    # we need to create a virtualenv
+    tmpdir.join("ubuild.py").write(UBUILD)
+    code, out, err = execute_script(
+        "uranium_standalone", "--uranium-dir", URANIUM_SOURCE_ROOT,
+        cwd=tmpdir.strpath
+    )
+    print("stdout:\n" + str(out))
+    print("stderr:\n" + str(err))
+    assert code == 0

uranium/build.py

@@ -49,7 +49,8 @@ def __init__(self, root, config=None, with_sandbox=True):
         self._root = root
         self._executables = Executables(root)
         self._hooks = Hooks()
-        self._packages = Packages()
+        virtualenv_dir = root if with_sandbox else None
+        self._packages = Packages(virtualenv_dir=virtualenv_dir)
         self._tasks = Tasks()
         self._envvars = EnvironmentVariables()
         self._options = None

uranium/packages/__init__.py

@@ -2,6 +2,7 @@
 from ..exceptions import PackageException
 from .install_command import install, uninstall
 from .versions import Versions
+import virtualenv
 
 p_assert = get_assert_function(PackageException)
 
@@ -16,7 +17,8 @@ class Packages(object):
     mutable: updating them will take immediate effect.
     """
 
-    def __init__(self):
+    def __init__(self, virtualenv_dir=None):
+        self._virtualenv_dir = virtualenv_dir
         self._versions = Versions()
         self._index_urls = list(DEFAULT_INDEX_URLS)
 
@@ -90,6 +92,13 @@ def install(self, name, version=None, develop=False, upgrade=False, install_opti
             for req in req_set.requirements.values():
                 if req.installed_version:
                     self.versions[req.name] = ("==" + req.installed_version)
+        # if virtualenv dir is set, we should make the environment relocatable.
+        # this will fix issues with commands not being usable by the
+        # uranium via build.executables.run
+        if self._virtualenv_dir:
+            return
+            virtualenv.make_environment_relocatable(self._virtualenv_dir)
+
 
     def uninstall(self, package_name):
         """