Add BUILD file for zerocopy-derive kleaf build

Test:
touch external/rust/crates/unicode-ident/WORKSPACE && \
touch external/rust/crates/proc-macro2/WORKSPACE && \
touch external/rust/crates/quote/WORKSPACE && \
touch external/rust/crates/syn/WORKSPACE && \
touch external/rust/crates/zerocopy-derive/WORKSPACE && \
b build @zerocopy-derive \
  --override_repository=unicode-ident=external/rust/crates/unicode-ident/ \
  --override_repository=proc-macro2=external/rust/crates/proc-macro2/ \
  --override_repository=quote=external/rust/crates/quote/ \
  --override_repository=syn=external/rust/crates/syn/ \
  --override_repository=zerocopy-derive=external/rust/crates/zerocopy-derive/
Bug: 304282799

Change-Id: I84385d5131b1e516626141587675b95167e7042e

1 files changed, 46 insertions, 0 deletions

diff --git a/BUILD b/BUILD
new file mode 100644
index 0000000..b05c589
--- /dev/null
+++ b/BUILD
@@ -0,0 +1,46 @@
+load("@rules_license//rules:license.bzl", "license")
+load("@rules_license//rules:license_kind.bzl", "license_kind")
+load("@rules_rust//rust:defs.bzl", "rust_proc_macro")
+
+package(
+    default_applicable_licenses = [":license"],
+    default_visibility = ["//visibility:public"],
+)
+
+license(
+    name = "license",
+    license_kinds = [
+        ":SPDX-license-identifier-Apache-2.0",
+        ":SPDX-license-identifier-MIT",
+    ],
+    license_text = "LICENSE-APACHE",
+    visibility = [":__subpackages__"],
+)
+
+license_kind(
+    name = "SPDX-license-identifier-Apache-2.0",
+    conditions = ["notice"],
+    url = "https://spdx.org/licenses/Apache-2.0.html",
+)
+
+license_kind(
+    name = "SPDX-license-identifier-MIT",
+    conditions = ["notice"],
+    url = "",
+)
+
+rust_proc_macro(
+    name = "zerocopy-derive",
+    srcs = glob(["**/*.rs"]),
+    edition = "2018",
+    deps = [
+        # This should map to repo checked out from Android third party project
+        # "platform/external/rust/crates/proc-macro2". Similar for the rest of the dependencies
+        # below.
+        "@proc-macro2",
+        # Map to project repo "platform/external/rust/crates/quote".
+        "@quote",
+        # Map to project repo "platform/external/rust/crates/syn".
+        "@syn",
+    ],
+)