1 files changed, 84 insertions, 0 deletions
diff --git a/taskcluster/taskgraph/transforms/job/mach.py b/taskcluster/taskgraph/transforms/job/mach.py
new file mode 100644
index 0000000000..5a771a743c
--- /dev/null
+++ b/taskcluster/taskgraph/transforms/job/mach.py
@@ -0,0 +1,84 @@
+# 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/.
+"""
+Support for running mach tasks (via run-task)
+"""
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+from six import text_type
+from taskgraph.transforms.job import run_job_using, configure_taskdesc_for_run
+from taskgraph.util.schema import (
+    Schema,
+    taskref_or_string,
+)
+from voluptuous import Required, Optional, Any
+
+mach_schema = Schema(
+    {
+        Required("using"): "mach",
+        # The mach command (omitting `./mach`) to run
+        Required("mach"): taskref_or_string,
+        # The version of Python to run with. Either an absolute path to the binary
+        # on the worker, a version identifier (e.g python2.7 or 3.8). There is no
+        # validation performed to ensure the specified binaries actually exist.
+        Optional("python-version"): Any(text_type, int, float),
+        # The sparse checkout profile to use. Value is the filename relative to the
+        # directory where sparse profiles are defined (build/sparse-profiles/).
+        Optional("sparse-profile"): Any(text_type, None),
+        # if true, perform a checkout of a comm-central based branch inside the
+        # gecko checkout
+        Required("comm-checkout"): bool,
+        # Base work directory used to set up the task.
+        Optional("workdir"): text_type,
+    }
+)
+
+
+defaults = {
+    "comm-checkout": False,
+}
+
+
+@run_job_using("docker-worker", "mach", schema=mach_schema, defaults=defaults)
+@run_job_using("generic-worker", "mach", schema=mach_schema, defaults=defaults)
+def configure_mach(config, job, taskdesc):
+    run = job["run"]
+    worker = job["worker"]
+
+    additional_prefix = []
+    if worker["os"] == "macosx":
+        additional_prefix = ["LC_ALL=en_US.UTF-8", "LANG=en_US.UTF-8"]
+
+    python = run.get("python-version")
+    if python:
+        del run["python-version"]
+
+        if worker["os"] == "macosx" and python == 3:
+            python = "/usr/local/bin/python3"
+
+        python = str(python)
+        try:
+            float(python)
+            python = "python" + python
+        except ValueError:
+            pass
+
+        additional_prefix.append(python)
+
+    command_prefix = " ".join(additional_prefix + ["./mach "])
+
+    mach = run["mach"]
+    if isinstance(mach, dict):
+        ref, pattern = next(iter(mach.items()))
+        command = {ref: command_prefix + pattern}
+    else:
+        command = command_prefix + mach
+
+    # defer to the run_task implementation
+    run["command"] = command
+    run["cwd"] = "{checkout}"
+    run["using"] = "run-task"
+    del run["mach"]
+    configure_taskdesc_for_run(config, job, taskdesc, job["worker"]["implementation"])