Add options flag for avoiding full rebuilds

Add an options.conf flag for allowing builds to use mock's
--short-circuit for reducing rebuild time.

This change moves the feature from default enabling with no way to
turn off to default disable with a configure to turn on.

Signed-off-by: William Douglas <william.douglas@intel.com>

autospec/build.py

@@ -285,7 +285,7 @@ class Build(object):
             mockopts,
         ]
 
-        if not cleanup and self.must_restart == 0 and self.file_restart > 0 and set(filemanager.excludes) == set(filemanager.manual_excludes):
+        if config.config_opts.get('avoid_rebuild') and not cleanup and self.must_restart == 0 and self.file_restart > 0 and set(filemanager.excludes) == set(filemanager.manual_excludes):
             cmd_args.append("--no-clean")
             cmd_args.append("--short-circuit=binary")
 

autospec/config.py

@@ -157,6 +157,7 @@ class Config(object):
         }
         self.config_opts = {}
         self.config_options = {
+            "avoid_rebuild": "Try to use mock short circuit to avoid full rebuilds",
             "broken_c++": "extend flags with '-std=gnu++98",
             "cargo_vendor": "create vendor archive with cargo",
             "use_lto": "configure build for lto",