Add NUM_CONSECUTIVE_BUILDS configuration option

config.py

@@ -28,6 +28,10 @@ class BaseConfiguration(object):
     # Set to zero to disable polling
     POLLING_INTERVAL = 600
 
+    # Determines how many builds that can be submitted to the builder
+    # and be in the build state at a time. Set this to 0 for no restrictions
+    NUM_CONSECUTIVE_BUILDS = 5
+
     RPMS_DEFAULT_REPOSITORY = 'git://pkgs.fedoraproject.org/rpms/'
     RPMS_ALLOW_REPOSITORY = False
     RPMS_DEFAULT_CACHE = 'http://pkgs.fedoraproject.org/repo/pkgs/'

module_build_service/config.py

@@ -200,6 +200,10 @@ class Config(object):
             'type': list,
             'default': [],
             'desc': 'Allowed SCM URLs.'},
+        'num_consecutive_builds': {
+            'type': int,
+            'default': 0,
+            'desc': 'Number of consecutive component builds.'},
     }
 
     def __init__(self):
@@ -301,3 +305,10 @@ class Config(object):
         if not isinstance(l, list):
             raise TypeError("scmurls needs to be a list.")
         self.scmurls = [str(x) for x in l]
+
+    def _setifok_num_consecutive_builds(self, i):
+        if not isinstance(i, int):
+            raise TypeError('NUM_CONSECUTIVE_BUILDS needs to be an int')
+        if i < 0:
+            raise ValueError('NUM_CONSECUTIVE_BUILDS must be >= 0')
+        self.num_consecutive_builds = i