Bug 1534283 - use default parameters for mach try fuzzy r=tomprince

Differential Revision: https://phabricator.services.mozilla.com/D23225

--HG--
extra : moz-landing-system : lando

taskcluster/taskgraph/parameters.py

@@ -46,7 +46,7 @@ def get_app_version(product_dir='browser'):
 
 
 # Please keep this list sorted and in sync with taskcluster/docs/parameters.rst
-# Parameters are of the form: {name: default}
+# Parameters are of the form: {name: default} or {name: lambda: default}
 PARAMETERS = {
     'app_version': get_app_version(),
     'base_repository': 'https://hg.mozilla.org/mozilla-unified',

tools/tryselect/cli.py

@@ -68,7 +68,7 @@ COMMON_ARGUMENT_GROUPS = {
         [['-p', '--parameters'],
          {'default': None,
           'help': "Use the given parameters.yml to generate tasks, "
-                  "defaults to latest parameters.yml from mozilla-central",
+                  "defaults to a default set of parameters",
           }],
     ],
 }

tools/tryselect/tasks.py

@@ -55,8 +55,6 @@ def invalidate(cache, root):
 
 
 def generate_tasks(params, full, root):
-    params = params or "project=mozilla-central"
-
     # Try to delete the old taskgraph cache directory.
     old_cache_dir = os.path.join(get_state_dir(), 'cache', 'taskgraph')
     if os.path.isdir(old_cache_dir):