fbshipit-source-id: 4e3cfdee46b216ce5ea85d0955be6804976a8a8b

shim/.gitignore

@@ -0,0 +1,5 @@
+# We currently expect end users to run reindeer vendor themselves
+# so mark these things as to ignore
+/third-party/rust/.cargo/
+/third-party/rust/BUCK
+/third-party/rust/vendor/

shim/BUCK

@@ -1,36 +1,5 @@
-load("@prelude//toolchains:cxx.bzl", "system_cxx_toolchain")
-load("@prelude//toolchains:genrule.bzl", "system_genrule_toolchain")
-load("@prelude//toolchains:ocaml.bzl", "system_ocaml_toolchain")
-load("@prelude//toolchains:python.bzl", "system_python_bootstrap_toolchain", "system_python_toolchain")
-load("@prelude//toolchains:rust.bzl", "system_rust_toolchain")
+load("@prelude//toolchains:demo.bzl", "system_demo_toolchains")
 
-system_cxx_toolchain(
-    name = "cxx",
-    visibility = ["PUBLIC"],
-)
-
-system_genrule_toolchain(
-    name = "genrule",
-    visibility = ["PUBLIC"],
-)
-
-system_ocaml_toolchain(
-    name = "ocaml",
-    visibility = ["PUBLIC"],
-)
-
-system_python_toolchain(
-    name = "python",
-    visibility = ["PUBLIC"],
-)
-
-system_python_bootstrap_toolchain(
-    name = "python_bootstrap",
-    visibility = ["PUBLIC"],
-)
-
-system_rust_toolchain(
-    name = "rust",
-    default_edition = "2021",
-    visibility = ["PUBLIC"],
-)
+# All the default toolchains, suitable for a quick demo or early prototyping.
+# Most real projects should copy/paste the implementation to configure them.
+system_demo_toolchains()

shim/README.md

@@ -0,0 +1,4 @@
+# Open Source Shim
+
+These files are a shim that allow us to build Buck2 with Buck2 outside Meta in
+the open source world.

shim/buck2/buck_rust_binary.bzl

@@ -0,0 +1,13 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+
+load(
+    "//:shims.bzl",
+    _rust_binary = "rust_binary",
+)
+
+buck_rust_binary = _rust_binary

shim/buck2/proto_defs.bzl

@@ -0,0 +1,13 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+
+load(
+    "//:shims.bzl",
+    _rust_protobuf_library = "rust_protobuf_library",
+)
+
+rust_protobuf_library = _rust_protobuf_library

shim/build_defs/lib/python_common.bzl

@@ -0,0 +1,14 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+
+def get_ldflags(*args):
+    _unused = args  # @unused
+    return []
+
+def get_strip_mode(*args):
+    _unused = args  # @unused
+    return ""

shim/build_defs/native_rules.bzl

@@ -5,12 +5,18 @@
 # License, Version 2.0 found in the LICENSE-APACHE file in the root directory
 # of this source tree.
 
+def buck_genrule(visibility = ["PUBLIC"], **kwargs):
+    # @lint-ignore BUCKLINT: avoid "native is forbidden in fbcode"
+    native.genrule(visibility = visibility, **kwargs)
+
 def buck_command_alias(**_):
     pass
 
 def buck_filegroup(visibility = ["PUBLIC"], **kwargs):
     # @lint-ignore BUCKLINT: avoid "native is forbidden in fbcode"
-    native.filegroup(
-        visibility = visibility,
-        **kwargs
-    )
+    native.filegroup(visibility = visibility, **kwargs)
+
+def alias(actual, visibility = ["PUBLIC"], **kwargs):
+    if actual.startswith("//buck2/"):
+        actual = "root//" + actual.removeprefix("//buck2/")
+    native.alias(actual = actual, visibility = visibility, **kwargs)

shim/build_defs/package_local_utils.bzl

@@ -0,0 +1,13 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+
+def _set_clang_version(_version, _overwrite = False):
+    pass
+
+package_local_utils = struct(
+    set_clang_version = _set_clang_version,
+)

shim/build_defs/platform_utils.bzl

@@ -0,0 +1,11 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+
+def _get_cxx_platform_for_base_path(_base_path):
+    return struct(target_platform = None)
+
+platform_utils = struct(get_cxx_platform_for_base_path = _get_cxx_platform_for_base_path)

shim/build_defs/python_binary.bzl

@@ -0,0 +1,12 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+
+def python_binary(srcs = [], **kwargs):
+    _unused = srcs  # @unused
+
+    # @lint-ignore BUCKLINT: avoid "Direct usage of native rules is not allowed."
+    native.python_binary(**kwargs)

shim/build_defs/rust_unittest.bzl

@@ -0,0 +1,10 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+
+load("//:shims.bzl", _rust_unittest = "rust_unittest")
+
+rust_unittest = _rust_unittest

shim/grpc_fb/codegen/buck_macros.bzl

@@ -0,0 +1,10 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+
+def grpc_library(**kwargs):
+    _unused = kwargs  # @unused
+    pass