[pkg] separate leap requirements

this is part of a process to make the setup of the development mode less
troublesome. from now on, setting up a virtualenv in pure development
mode will be as easy as telling pip to just install the external
dependencies::

  pip install -r pkg/requirements.pip

and traversing all the leap repos for the needed leap dependencies doing::

  python setup.py develop

- Related: #7288

1 files changed, 16 insertions, 2 deletions

diff --git a/pkg/utils.py b/pkg/utils.py
index deace14b..2e316d45 100644
--- a/pkg/utils.py
+++ b/pkg/utils.py
@@ -14,16 +14,30 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
 """
 Utils to help in the setup process
 """
-
 import os
 import re
 import sys
 
 
+def is_develop_mode():
+    """
+    Returns True if we're calling the setup script using the argument for
+    setuptools development mode.
+
+    This avoids messing up with dependency pinning and order, the
+    responsibility of installing the leap dependencies is left to the
+    developer.
+    """
+    args = sys.argv
+    devflags = "setup.py", "develop"
+    if (args[0], args[1]) == devflags:
+        return True
+    return False
+
+
 def get_reqs_from_files(reqfiles):
     """
     Returns the contents of the top requirement file listed as a