For some reason, on Mac setup_tools won't create the installation directory if
it doesn't exist, while it appears to do so on Linux and Windows.
BUG=
TEST=
Review URL: http://codereview.chromium.org/9323030
git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@120331 0039d316-1c4b-4281-b951-d872f2087c98
This CL introduces package_management.py, a module for managing third-party Python packages in a site directory within depot_tools. A future CL will integrate this with depot_tools, causing the packages to be downloaded and installed on first run after that CL lands. Once in place presubmit_canned_checks will be extended to make use of the locally installed version of pylint.
BUG=
TEST=
Review URL: http://codereview.chromium.org/8965033
git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@120225 0039d316-1c4b-4281-b951-d872f2087c98
chrisha@chromium.org