Add a Soong build module for the host library am: b1bfb99b28 am: de8ffc19e9 am: 68a8d91c8b am: d209e641db

Original change: https://android-review.googlesource.com/c/platform/external/jimfs/+/1362018

Change-Id: I480481cb82cd5547aa148b86abb83f569d5d8b10
diff --git a/jimfs/Android.bp b/jimfs/Android.bp
new file mode 100644
index 0000000..4236720
--- /dev/null
+++ b/jimfs/Android.bp
@@ -0,0 +1,45 @@
+// Copyright (C) 2020 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+java_library_host {
+    name: "jimfs",
+    srcs: [
+        "src/main/java/**/*.java",
+        ":jimfs-annotation-stubs-srcjar",
+    ],
+    libs: [
+        "auto_service_annotations",
+        "guava",
+        "icu4j",
+    ],
+    plugins: [
+        "auto_service_plugin",
+    ],
+}
+
+java_genrule_host {
+    name: "jimfs-annotation-stubs-srcjar",
+    tool_files: [
+        "gen_annotations.py",
+    ],
+    tools: [
+        "soong_zip",
+    ],
+    cmd: "$(location gen_annotations.py) $(genDir)/java && " +
+         "$(location soong_zip) -jar -o $(out) -C $(genDir)/java -D $(genDir)/java",
+    out: [
+        "jimfs-annotation-stubs.srcjar"
+    ],
+}
diff --git a/jimfs/gen_annotations.py b/jimfs/gen_annotations.py
new file mode 100755
index 0000000..15938e4
--- /dev/null
+++ b/jimfs/gen_annotations.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+
+# Copyright (C) 2020 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Generates stubs for annotations that aren't in the Android source tree."""
+
+import pathlib
+import string
+import sys
+
+_ANNOTATIONS_CLASSES = ['org.checkerframework.checker.nullness.compatqual.NullableDecl']
+
+_CLASS_TEMPLATE = string.Template("""
+package ${package_name};
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target({
+    ElementType.ANNOTATION_TYPE,
+    ElementType.CONSTRUCTOR,
+    ElementType.FIELD,
+    ElementType.LOCAL_VARIABLE,
+    ElementType.METHOD,
+    ElementType.PACKAGE,
+    ElementType.PARAMETER,
+    ElementType.TYPE,
+    ElementType.TYPE_PARAMETER,
+    ElementType.TYPE_USE})
+@Retention(RetentionPolicy.SOURCE)
+public @interface ${class_name} {}
+""")
+
+if __name__ == '__main__':
+  out_dir = pathlib.Path(sys.argv[1])
+
+  for c in _ANNOTATIONS_CLASSES:
+    parts = c.split('.')
+    src_path = out_dir.joinpath(*parts).with_suffix('.java')
+    src_path.parent.mkdir(parents=True)
+    src_path.write_text(
+        _CLASS_TEMPLATE.substitute(
+            package_name='.'.join(parts[:-1]), class_name=parts[-1]))