Add hacky kind that can modify upstream parts of the graph

taskcluster/kinds/all-pr/kind.yml

@@ -17,6 +17,7 @@ kind-dependencies:
     - evaluate
     - evaluate-quantized
     - evaluate-teacher-ensemble
+    - modify-graph
 
 tasks:
     all:

taskcluster/kinds/all/kind.yml

@@ -16,6 +16,7 @@ kind-dependencies:
     - evaluate
     - evaluate-quantized
     - evaluate-teacher-ensemble
+    - modify-graph
 
 tasks:
     all:

taskcluster/kinds/modify-graph/kind.yml

@@ -0,0 +1,35 @@
+# 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/.
+---
+
+loader: taskgraph.loader.transform:loader
+
+transforms:
+    - translations_taskgraph.transforms.modify_graph
+    - taskgraph.transforms.task_context
+    - taskgraph.transforms.task:transforms
+
+kind-dependencies:
+    - clean-corpus
+    - bicleaner
+    - merge-corpus
+
+tasks:
+    all:
+        description: Modify upstream parts of the graph
+        attributes:
+            stage: all
+            src_locale: "{src_locale}"
+            trg_locale: "{trg_locale}"
+
+        task-context:
+            from-parameters:
+                src_locale: training_config.experiment.src
+                trg_locale: training_config.experiment.trg
+            substitution-fields:
+                - attributes
+
+        run-on-tasks-for: []
+        expires-after: "90 days"
+        worker-type: succeed

taskcluster/translations_taskgraph/actions/train.py

@@ -144,6 +144,9 @@ def validate_pretrained_models(params):
                     },
                     "bicleaner": {
                         "properties": {
+                            "disable": {
+                                "type": "string",
+                            },
                             "default-threshold": {
                                 "type": "number",
                                 "description": "bicleaner threshold",

taskcluster/translations_taskgraph/parameters.py

@@ -27,6 +27,7 @@ def get_defaults(_):
                 "best-model": "chrf",
                 "use-opuscleaner": "true",
                 "bicleaner": {
+                    "disable": "true",
                     "default-threshold": 0.5,
                     "dataset-thresholds": {
                         "opus_ada83/v1": 0.0,
@@ -126,6 +127,7 @@ def get_defaults(_):
                 Required("best-model"): str,
                 Required("use-opuscleaner"): str,
                 Required("bicleaner"): {
+                    Required("disable"): str,
                     Required("default-threshold"): float,
                     Optional("dataset-thresholds"): {
                         str: float,

taskcluster/translations_taskgraph/transforms/modify_graph.py

@@ -0,0 +1,49 @@
+# 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 json
+
+from taskgraph.transforms.base import TransformSequence
+
+transforms = TransformSequence()
+
+
+@transforms.add
+def enable_or_disable_bicleaner(config, jobs):
+    """Set the appropriate dependencies and fetches based on whether bicleaner
+    is enabled or disabled."""
+
+    merge_corpus_task = None
+    for name, task in config.kind_dependencies_tasks.items():
+        if name.startswith("merge-corpus"):
+            merge_corpus_task = task
+
+    if not merge_corpus_task:
+        raise Exception("Couldn't find merge corpus task!")
+
+    pull_from = "bicleaner"
+    if config.params["training_config"]["experiment"]["bicleaner"]["disable"]:
+        pull_from = "clean-corpus"
+
+    # If bicleaner is disabled, we pull upstream artifacts from `clean-corpus`
+    new_deps = {}
+    for name, task in config.kind_dependencies_tasks.items():
+        if name.startswith(pull_from):
+            new_deps[task.kind] = task.label
+
+    merge_corpus_task.dependencies.update(new_deps)
+    # Also need to set up fetches, which will involve setting the `MOZ_FETCHES` env var
+    # like the `run` transform does: https://github.com/taskcluster/taskgraph/blob/1a7dba0db709c84940fcf85a421c1dfc931f9747/src/taskgraph/transforms/run/__init__.py#L207
+    # this will have to get somehow combined with the existing `MOZ_FETCHES` present in merge_corpus_task.task["payload"]["env"]
+    fetches = json.loads(merge_corpus_task.task["payload"]["env"]["MOZ_FETCHES"]["task-reference"])
+    # Consult an existing task definition for the MOZ_FETCHES format
+    fetches.append([
+        {"artifact": "something", "extract": True, "task": f"<{pull_from}>"}
+    ])
+    merge_corpus_task.task["payload"]["env"]["MOZ_FETCHES"]["task-reference"] = json.dumps(fetches)
+
+    # We don't actually make any adjustements to the new jobs; this transform only exists
+    # to cause the side effects done above.
+    yield from jobs