gather: Print specific Requires which pulls a package in

When dependencies are pulled in, it's useful to know not only the
package that requires them, but also the specific requires.

This patch only implement this for the YUM version.

Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>

pungi/gather.py

@@ -99,6 +99,31 @@ class MyConfigParser(ConfigParser.ConfigParser):
         return optionstr
 
 
+FLAGS = {
+    'EQ': '=',
+    'GE': '>=',
+    'LE': '<=',
+    'GT': '>',
+    'LT': '<',
+}
+
+
+class Req(object):
+    """A wrapper for a tuple representing a Requires tag.
+
+    Only useful for formatting the value into a human readable string.
+    """
+    def __init__(self, req):
+        self.r, self.f, self.v = req
+
+    def __str__(self):
+        if self.f and self.v:
+            flag = FLAGS.get(self.f, '??')
+            version = '%s:%s-%s' % self.v
+            return '%s %s %s' % (self.r, flag, version)
+        return self.r
+
+
 class PungiBase(object):
     """The base Pungi class.  Set up config items and logging here"""
 
@@ -636,7 +661,8 @@ class Pungi(PungiBase):
 
                 for dep in deps:
                     if dep not in added:
-                        msg = 'Added %s.%s (repo: %s) for %s.%s' % (dep.name, dep.arch, dep.repoid, po.name, po.arch)
+                        msg = 'Added %s.%s (repo: %s) for %s.%s (Requires: %s)' % (
+                            dep.name, dep.arch, dep.repoid, po.name, po.arch, Req(req))
                         self.add_package(dep, msg)
                         added.add(dep)