Add win-arm64 migrator

conda_forge_tick/make_migrators.py

@@ -74,7 +74,7 @@
     make_from_lazy_json_data,
     skip_migrator_due_to_schema,
 )
-from conda_forge_tick.migrators.arch import OSXArm
+from conda_forge_tick.migrators.arch import OSXArm, WinArm64
 from conda_forge_tick.migrators.migration_yaml import (
     MigrationYamlCreator,
     create_rebuild_graph,
@@ -232,6 +232,15 @@
             ),
         )
 
+    with fold_log_lines("making win-arm64 migrator"):
+        migrators.append(
+            WinArm64(
+                graph=total_graph,
+                pr_limit=PR_LIMIT,
+                name="arm64 win addition",
+            ),
+        )
+
 
 def add_rebuild_migration_yaml(
     migrators: MutableSequence[Migrator],

conda_forge_tick/migrators/__init__.py

@@ -1,5 +1,5 @@
 # flake8: noqa
-from .arch import ArchRebuild, OSXArm
+from .arch import ArchRebuild, OSXArm, WinArm64
 from .broken_rebuild import RebuildBroken
 from .conda_forge_yaml_cleanup import CondaForgeYAMLCleanup
 from .core import (

conda_forge_tick/migrators/arch.py

@@ -413,3 +413,150 @@
 
     def remote_branch(self, feedstock_ctx: FeedstockContext) -> str:
         return super().remote_branch(feedstock_ctx) + "_arm_osx"
+
+
+class WinArm64(GraphMigrator):
+    """
+    A Migrator that add win-arm64 builds to feedstocks
+    """
+
+    migrator_version = 1
+    rerender = True
+    # We purposefully don't want to bump build number for this migrator
+    bump_number = 0
+    ignored_packages = {}
+    arches = {"win_arm64": "win_64"}
+
+    def __init__(
+        self,
+        graph: nx.DiGraph = None,
+        name: Optional[str] = None,
+        pr_limit: int = 0,
+        piggy_back_migrations: Optional[Sequence[MiniMigrator]] = None,
+        target_packages: Optional[Sequence[str]] = None,
+        effective_graph: nx.DiGraph = None,
+        _do_init: bool = True,
+    ):
+        if _do_init:
+            if target_packages is None:
+                # We are constraining the scope of this migrator
+                with open(
+                    os.path.join(
+                        os.environ["CONDA_PREFIX"],
+                        "share",
+                        "conda-forge",
+                        "migrations",
+                        "win_arm64.txt",
+                    )
+                ) as f:
+                    target_packages = set(f.read().split())
+
+            if "outputs_lut" not in graph.graph:
+                graph.graph["outputs_lut"] = make_outputs_lut_from_graph(graph)
+
+            # rebuild the graph to only use edges from the arm and power requirements
+            graph2 = nx.create_empty_copy(graph)
+            for node, attrs in graph.nodes(data="payload"):
+                for plat_arch in self.arches:
+                    deps = set().union(
+                        *attrs.get(
+                            f"{plat_arch}_requirements",
+                            attrs.get("requirements", {}),
+                        ).values()
+                    )
+                    for dep in get_deps_from_outputs_lut(
+                        deps, graph.graph["outputs_lut"]
+                    ):
+                        graph2.add_edge(dep, node)
+                pass
+
+            graph = graph2
+            target_packages = set(target_packages)
+            if target_packages:
+                target_packages.add("python")  # hack that is ~harmless?
+                _cut_to_target_packages(graph, target_packages)
+
+            # filter out stub packages and ignored packages
+            _filter_stubby_and_ignored_nodes(graph, self.ignored_packages)
+
+        if not hasattr(self, "_init_args"):
+            self._init_args = []
+
+        if not hasattr(self, "_init_kwargs"):
+            self._init_kwargs = {
+                "graph": graph,
+                "name": name,
+                "pr_limit": pr_limit,
+                "piggy_back_migrations": piggy_back_migrations,
+                "target_packages": target_packages,
+                "effective_graph": effective_graph,
+                "_do_init": False,
+            }
+
+        super().__init__(
+            graph=graph,
+            pr_limit=pr_limit,
+            check_solvable=False,
+            piggy_back_migrations=piggy_back_migrations,
+            effective_graph=effective_graph,
+        )
+
+        assert not self.check_solvable, "We don't want to check solvability for aarch!"
+        self.target_packages = target_packages
+        self.name = name
+
+        if _do_init:
+            self._reset_effective_graph()
+
+    def filter(self, attrs: "AttrsTypedDict", not_bad_str_start: str = "") -> bool:
+        if super().filter(attrs):
+            return True
+        muid = frozen_to_json_friendly(self.migrator_uid(attrs))
+        for arch in self.arches:
+            configured_arch = (
+                attrs.get("conda-forge.yml", {}).get("provider", {}).get(arch)
+            )
+            if configured_arch:
+                return muid in _sanitized_muids(
+                    attrs.get("pr_info", {}).get("PRed", []),
+                )
+        else:
+            return False
+
+    def migrate(
+        self, recipe_dir: str, attrs: "AttrsTypedDict", **kwargs: Any
+    ) -> "MigrationUidTypedDict":
+        with pushd(recipe_dir + "/.."):
+            self.set_build_number("recipe/meta.yaml")
+            with open("conda-forge.yml") as f:
+                y = yaml_safe_load(f)
+            if "provider" not in y:
+                y["provider"] = {}
+            for k, v in self.arches.items():
+                if k not in y["provider"]:
+                    y["provider"][k] = v
+
+            with open("conda-forge.yml", "w") as f:
+                yaml_safe_dump(y, f)
+
+        return super().migrate(recipe_dir, attrs, **kwargs)
+
+    def pr_title(self, feedstock_ctx: FeedstockContext) -> str:
+        return "Windows ARM Migrator"
+
+    def pr_body(self, feedstock_ctx: ClonedFeedstockContext) -> str:
+        body = super().pr_body(feedstock_ctx)
+        body = body.format(
+            dedent(
+                """\
+        This feedstock is being rebuilt as part of the windows arm migration.
+
+        **Feel free to merge the PR if CI is all green, but please don't close it
+        without reaching out the the ARM Windows team first at <code>@</code>conda-forge/help-win-arm64.**
+        """,
+            ),
+        )
+        return body
+
+    def remote_branch(self, feedstock_ctx: FeedstockContext) -> str:
+        return super().remote_branch(feedstock_ctx) + "_arm_win"

conda_forge_tick/models/pr_info.py

@@ -53,6 +53,7 @@ class MigratorName(StrEnum):
     VERSION = "Version"
     ARCH_REBUILD = "ArchRebuild"
     OSX_ARM = "OSXArm"
+    WIN_ARM64 = "WinArm64"
     MIGRATION_YAML = "MigrationYaml"
     REBUILD = "Rebuild"
     BLAS_REBUILD = "BlasRebuild"

conda_forge_tick/status_report.py

@@ -29,6 +29,7 @@
     OSXArm,
     Replacement,
     Version,
+    WinArm64,
 )
 from conda_forge_tick.os_utils import eval_cmd
 from conda_forge_tick.path_lengths import cyclic_topological_sort
@@ -437,6 +438,7 @@ def main() -> None:
                     mgconf.get("longterm", False)
                     or isinstance(migrator, ArchRebuild)
                     or isinstance(migrator, OSXArm)
+                    or isinstance(migrator, WinArm64)
                 ):
                     longterm_status[migrator_name] = f"{migrator.name} Migration Status"
                 else:

tests/test_migrator_to_json.py

@@ -267,3 +267,30 @@ def test_migrator_to_json_osx_arm():
     ]
     assert isinstance(migrator2, conda_forge_tick.migrators.OSXArm)
     assert dumps(migrator2.to_lazy_json_data()) == lzj_data
+
+
+def test_migrator_to_json_win_arm64():
+    gx = nx.DiGraph()
+    gx.add_node("conda", reqs=["python"], payload={}, blah="foo")
+
+    migrator = conda_forge_tick.migrators.WinArm64(
+        target_packages=["python"],
+        graph=gx,
+        pr_limit=5,
+        name="arm64 win addition",
+    )
+
+    data = migrator.to_lazy_json_data()
+    pprint.pprint(data)
+    lzj_data = dumps(data)
+    print("lazy json data:\n", lzj_data)
+    assert data["__migrator__"] is True
+    assert data["class"] == "WinArm64"
+    assert data["name"] == "arm64_win_addition"
+
+    migrator2 = make_from_lazy_json_data(loads(lzj_data))
+    assert [pgm.__class__.__name__ for pgm in migrator2.piggy_back_migrations] == [
+        pgm.__class__.__name__ for pgm in migrator.piggy_back_migrations
+    ]
+    assert isinstance(migrator2, conda_forge_tick.migrators.WinArm64)
+    assert dumps(migrator2.to_lazy_json_data()) == lzj_data