Bug 1341214 - Define GECKO in a single location. r=dustin

Instead of every file trying to get the top source directory having an
ad-hoc definition that gets wrong if the files gets moved around for
some reason, define it in a more central location.

taskcluster/taskgraph/__init__.py

@@ -0,0 +1,7 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import os
+
+GECKO = os.path.realpath(os.path.join(__file__, '..', '..', '..'))

taskcluster/taskgraph/cron/__init__.py

@@ -21,6 +21,7 @@ from .util import (
     calculate_head_rev
 )
 from ..create import create_task
+from .. import GECKO
 from taskgraph.util.attributes import match_run_on_projects
 from taskgraph.util.schema import resolve_keyed_by
 
@@ -32,7 +33,6 @@ JOB_TYPES = {
     'decision-task': decision.run_decision_task,
 }
 
-GECKO = os.path.realpath(os.path.join(__file__, '..', '..', '..', '..'))
 logger = logging.getLogger(__name__)
 _session = None
 

taskcluster/taskgraph/decision.py

@@ -18,6 +18,7 @@ from .create import create_tasks
 from .parameters import Parameters
 from .taskgraph import TaskGraph
 from actions import render_actions_json
+from . import GECKO
 
 from taskgraph.util.templates import Templates
 from taskgraph.util.time import (
@@ -28,7 +29,6 @@ from taskgraph.util.time import (
 logger = logging.getLogger(__name__)
 
 ARTIFACTS_DIR = 'artifacts'
-GECKO = os.path.realpath(os.path.join(__file__, '..', '..', '..'))
 
 # For each project, this gives a set of parameters specific to the project.
 # See `taskcluster/docs/parameters.rst` for information on parameters.

taskcluster/taskgraph/docker.py

@@ -18,8 +18,8 @@ from subprocess import Popen, PIPE
 from io import BytesIO
 
 from taskgraph.util import docker
+from . import GECKO
 
-GECKO = os.path.realpath(os.path.join(__file__, '..', '..', '..'))
 INDEX_URL = 'https://index.taskcluster.net/v1/task/' + docker.INDEX_PREFIX + '.{}.{}.hash.{}'
 ARTIFACT_URL = 'https://queue.taskcluster.net/v1/task/{}/artifacts/{}'
 

taskcluster/taskgraph/filter_tasks.py

@@ -5,7 +5,6 @@
 from __future__ import absolute_import, unicode_literals
 
 import logging
-import os
 
 from . import (
     target_tasks,
@@ -13,8 +12,6 @@ from . import (
 
 logger = logging.getLogger(__name__)
 
-GECKO = os.path.realpath(os.path.join(os.path.dirname(__file__), '..', '..'))
-
 filter_task_functions = {}
 
 

taskcluster/taskgraph/task/docker_image.py

@@ -9,6 +9,7 @@ import os
 import urllib2
 
 from . import base
+from .. import GECKO
 from taskgraph.util.docker import (
     docker_image,
     generate_context_hash,
@@ -17,7 +18,6 @@ from taskgraph.util.docker import (
 from taskgraph.util.templates import Templates
 
 logger = logging.getLogger(__name__)
-GECKO = os.path.realpath(os.path.join(__file__, '..', '..', '..', '..'))
 
 # if running in a task, prefer to use the taskcluster proxy (http://taskcluster/),
 # otherwise hit the services directly

taskcluster/taskgraph/taskgraph.py

@@ -4,13 +4,10 @@
 
 from __future__ import absolute_import, print_function, unicode_literals
 
-import os
-
 from .graph import Graph
 from .util.python_path import find_object
 
 TASKCLUSTER_QUEUE_URL = "https://queue.taskcluster.net/v1/task/"
-GECKO = os.path.realpath(os.path.join(__file__, '..', '..', '..'))
 
 
 class TaskGraph(object):

taskcluster/taskgraph/transforms/job/toolchain.py

@@ -7,8 +7,6 @@ Support for running toolchain-building jobs via dedicated scripts
 
 from __future__ import absolute_import, print_function, unicode_literals
 
-import os
-
 from voluptuous import Schema, Optional, Required, Any
 
 from taskgraph.transforms.job import run_job_using
@@ -18,9 +16,9 @@ from taskgraph.transforms.job.common import (
     docker_worker_support_vcs_checkout,
 )
 from taskgraph.util.hash import hash_paths
+from taskgraph import GECKO
 
 
-GECKO = os.path.realpath(os.path.join(__file__, '..', '..', '..', '..', '..'))
 TOOLCHAIN_INDEX = 'gecko.cache.level-{level}.toolchains.v1.{name}.{digest}'
 
 toolchain_run_schema = Schema({

taskcluster/taskgraph/util/docker.py

@@ -14,9 +14,9 @@ import tempfile
 from mozpack.archive import (
     create_tar_gz_from_files,
 )
+from .. import GECKO
 
 
-GECKO = os.path.realpath(os.path.join(__file__, '..', '..', '..', '..'))
 IMAGE_DIR = os.path.join(GECKO, 'taskcluster', 'docker')
 INDEX_PREFIX = 'docker.images.v2'
 ARTIFACT_URL = 'https://queue.taskcluster.net/v1/task/{}/artifacts/{}'