Open source the Codegen!

Summary:
This is very much a work in progress. Moving it into the open source repo to be able to hook it up to generate some Fabric files.

Will continue to iterate on it in the open.

Reviewed By: hramos, mdvacca

Differential Revision: D13500969

fbshipit-source-id: 79082447dc52b5834f24eb72bc6e07200b324238

codegen/BUCK

@@ -0,0 +1,120 @@
+load("@fbsource//tools/build_defs/oss:rn_defs.bzl", "rn_xplat_cxx_library")
+load("@fbsource//tools/build_defs:default_platform_defs.bzl", "ANDROID", "APPLE")
+load("@fbsource//tools/build_defs:fb_native_wrapper.bzl", "fb_native")
+load("@fbsource//tools/build_defs:fb_xplat_cxx_binary.bzl", "fb_xplat_cxx_binary")
+load("@fbsource//xplat/js/react-native-github/codegen:DEFS.bzl", "rn_codegen_test")
+
+fb_native.sh_binary(
+    name = "rn_codegen",
+    main = "buck_tests/generate_tests.sh",
+    resources = glob(
+        [
+            "**/*.js",
+            "buck_tests/generate-tests.js",
+        ],
+    ) + [
+        "xplat//js:setup_env",
+    ],
+    visibility = ["PUBLIC"],
+)
+
+rn_codegen_test(
+    fixture_name = "SINGLE_COMPONENT_WITH_BOOLEAN_PROP",
+)
+
+rn_codegen_test(
+    fixture_name = "SINGLE_COMPONENT_WITH_STRING_PROP",
+)
+
+rn_codegen_test(
+    fixture_name = "SINGLE_COMPONENT_WITH_INTEGER_PROPS",
+)
+
+rn_codegen_test(
+    fixture_name = "SINGLE_COMPONENT_WITH_FLOAT_PROPS",
+)
+
+rn_codegen_test(
+    fixture_name = "SINGLE_COMPONENT_WITH_COLOR_PROP",
+)
+
+rn_codegen_test(
+    fixture_name = "SINGLE_COMPONENT_WITH_ENUM_PROP",
+)
+
+rn_codegen_test(
+    fixture_name = "SINGLE_COMPONENT_WITH_EVENT_PROPS",
+)
+
+rn_codegen_test(
+    fixture_name = "SINGLE_COMPONENT_WITH_EVENT_NESTED_OBJECT_PROPS",
+)
+
+rn_codegen_test(
+    fixture_name = "TWO_COMPONENTS_SAME_FILE",
+)
+
+rn_codegen_test(
+    fixture_name = "TWO_COMPONENTS_DIFFERENT_FILES",
+)
+
+fb_xplat_cxx_binary(
+    name = "rn_codegen_binary",
+    srcs = ["buck_tests/emptyFile.cpp"],
+    compiler_flags = [
+        "-fexceptions",
+        "-frtti",
+        "-std=c++14",
+        "-Wall",
+    ],
+    platforms = (ANDROID, APPLE),
+    preprocessor_flags = [
+        "-DLOG_TAG=\"ReactNative\"",
+        "-DWITH_FBSYSTRACE=1",
+    ],
+    visibility = ["PUBLIC"],
+    deps = [
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_BOOLEAN_PROP",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_COLOR_PROP",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_ENUM_PROP",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_EVENT_NESTED_OBJECT_PROPS",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_EVENT_PROPS",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_FLOAT_PROPS",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_INTEGER_PROPS",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_STRING_PROP",
+        ":generated_fixture_library-TWO_COMPONENTS_DIFFERENT_FILES",
+        ":generated_fixture_library-TWO_COMPONENTS_SAME_FILE",
+    ],
+)
+
+rn_xplat_cxx_library(
+    name = "rn_codegen_library",
+    srcs = ["buck_tests/emptyFile.cpp"],
+    headers = [],
+    compiler_flags = [
+        "-fexceptions",
+        "-frtti",
+        "-std=c++14",
+        "-Wall",
+    ],
+    platforms = (ANDROID, APPLE),
+    preprocessor_flags = [
+        "-DLOG_TAG=\"ReactNative\"",
+        "-DWITH_FBSYSTRACE=1",
+    ],
+    visibility = [
+        "PUBLIC",
+    ],
+    deps = [
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_BOOLEAN_PROP",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_COLOR_PROP",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_ENUM_PROP",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_EVENT_NESTED_OBJECT_PROPS",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_EVENT_PROPS",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_FLOAT_PROPS",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_INTEGER_PROPS",
+        ":generated_fixture_library-SINGLE_COMPONENT_WITH_STRING_PROP",
+        ":generated_fixture_library-TWO_COMPONENTS_DIFFERENT_FILES",
+        ":generated_fixture_library-TWO_COMPONENTS_SAME_FILE",
+    ],
+)

codegen/DEFS.bzl

@@ -0,0 +1,96 @@
+load("@fbsource//tools/build_defs:default_platform_defs.bzl", "ANDROID", "APPLE")
+load("@fbsource//tools/build_defs:fb_native_wrapper.bzl", "fb_native")
+load(
+    "//tools/build_defs/oss:rn_defs.bzl",
+    "react_native_xplat_target",
+    "rn_xplat_cxx_library",
+)
+
+def rn_codegen_test(
+        fixture_name = ""):
+    generate_fixtures_rule_name = "generate_fixtures-{}".format(fixture_name)
+    generate_component_descriptor_h_name = "generate_component_descriptor_h-{}".format(fixture_name)
+    generate_event_emitter_cpp_name = "generate_event_emitter_cpp-{}".format(fixture_name)
+    generate_event_emitter_h_name = "generate_event_emitter_h-{}".format(fixture_name)
+    generate_props_cpp_name = "generate_props_cpp-{}".format(fixture_name)
+    generate_props_h_name = "generated_props_h-{}".format(fixture_name)
+    generate_shadow_node_h_name = "generated_shadow_node_h-{}".format(fixture_name)
+
+    fb_native.genrule(
+        name = generate_fixtures_rule_name,
+        srcs = [],
+        cmd = "$(exe :rn_codegen) {} $OUT".format(fixture_name),
+        out = "codegenfiles-{}".format(fixture_name),
+    )
+
+    fb_native.genrule(
+        name = generate_component_descriptor_h_name,
+        cmd = "cp $(location :{})/ComponentDescriptors.h $OUT".format(generate_fixtures_rule_name),
+        out = "ComponentDescriptors.h",
+    )
+
+    fb_native.genrule(
+        name = generate_event_emitter_cpp_name,
+        cmd = "cp $(location :{})/EventEmitters.cpp $OUT".format(generate_fixtures_rule_name),
+        out = "EventEmitters.cpp",
+    )
+
+    fb_native.genrule(
+        name = generate_event_emitter_h_name,
+        cmd = "cp $(location :{})/EventEmitters.h $OUT".format(generate_fixtures_rule_name),
+        out = "EventEmitters.h",
+    )
+
+    fb_native.genrule(
+        name = generate_props_cpp_name,
+        cmd = "cp $(location :{})/Props.cpp $OUT".format(generate_fixtures_rule_name),
+        out = "Props.cpp",
+    )
+
+    fb_native.genrule(
+        name = generate_props_h_name,
+        cmd = "cp $(location :{})/Props.h $OUT".format(generate_fixtures_rule_name),
+        out = "Props.h",
+    )
+
+    fb_native.genrule(
+        name = generate_shadow_node_h_name,
+        cmd = "cp $(location :{})/ShadowNodes.h $OUT".format(generate_fixtures_rule_name),
+        out = "ShadowNodes.h",
+    )
+
+    # libs
+    rn_xplat_cxx_library(
+        name = "generated_fixture_library-{}".format(fixture_name),
+        srcs = [
+            ":{}".format(generate_event_emitter_cpp_name),
+            ":{}".format(generate_props_cpp_name),
+        ],
+        headers = [
+            ":{}".format(generate_component_descriptor_h_name),
+            ":{}".format(generate_event_emitter_h_name),
+            ":{}".format(generate_props_h_name),
+            ":{}".format(generate_shadow_node_h_name),
+        ],
+        exported_headers = {
+            "ComponentDescriptors.h": ":{}".format(generate_component_descriptor_h_name),
+            "EventEmitters.h": ":{}".format(generate_event_emitter_h_name),
+            "Props.h": ":{}".format(generate_props_h_name),
+            "ShadowNodes.h": ":{}".format(generate_shadow_node_h_name),
+        },
+        header_namespace = "react/components/{}".format(fixture_name),
+        compiler_flags = [
+            "-fexceptions",
+            "-frtti",
+            "-std=c++14",
+            "-Wall",
+        ],
+        platforms = (ANDROID, APPLE),
+        preprocessor_flags = [
+            "-DLOG_TAG=\"ReactNative\"",
+            "-DWITH_FBSYSTRACE=1",
+        ],
+        deps = [
+            react_native_xplat_target("fabric/components/view:view"),
+        ],
+    )

codegen/buck_tests/emptyFile.cpp

@@ -0,0 +1,14 @@
+#import <react/components/SINGLE_COMPONENT_WITH_BOOLEAN_PROP/ComponentDescriptors.h>
+#import <react/components/SINGLE_COMPONENT_WITH_STRING_PROP/ComponentDescriptors.h>
+#import <react/components/SINGLE_COMPONENT_WITH_INTEGER_PROPS/ComponentDescriptors.h>
+#import <react/components/SINGLE_COMPONENT_WITH_FLOAT_PROPS/ComponentDescriptors.h>
+#import <react/components/SINGLE_COMPONENT_WITH_COLOR_PROP/ComponentDescriptors.h>
+#import <react/components/SINGLE_COMPONENT_WITH_ENUM_PROP/ComponentDescriptors.h>
+#import <react/components/SINGLE_COMPONENT_WITH_EVENT_NESTED_OBJECT_PROPS/ComponentDescriptors.h>
+#import <react/components/SINGLE_COMPONENT_WITH_EVENT_PROPS/ComponentDescriptors.h>
+#import <react/components/TWO_COMPONENTS_SAME_FILE/ComponentDescriptors.h>
+#import <react/components/TWO_COMPONENTS_DIFFERENT_FILES/ComponentDescriptors.h>
+
+int main(){
+    return 0;
+}

codegen/buck_tests/generate-tests.js

@@ -0,0 +1,39 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ * @format
+ */
+
+'use strict';
+
+const RNCodegen = require('../src/generators/RNCodegen.js');
+
+const fixtures = require('../src/generators/__test_fixtures__/fixtures.js');
+const mkdirp = require('mkdirp');
+
+const args = process.argv.slice(2);
+if (args.length !== 2) {
+  throw new Error(
+    'Expected to receive the fixture name and output directory as the only arg',
+  );
+}
+
+const fixtureName = args[0];
+const outputDirectory = args[1];
+
+mkdirp.sync(outputDirectory);
+const fixture = fixtures[fixtureName];
+
+if (fixture == null) {
+  throw new Error(`Can't find fixture with name ${fixtureName}`);
+}
+
+RNCodegen.generate({
+  libraryName: fixtureName,
+  schema: fixture,
+  outputDirectory,
+});

codegen/buck_tests/generate_tests.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -e
+set -u
+
+THIS_DIR=$(cd -P "$(dirname "$(readlink "${BASH_SOURCE[0]}" || echo "${BASH_SOURCE[0]}")")" && pwd)
+
+# shellcheck source=xplat/js/env-utils/setup_env_vars.sh
+source "$THIS_DIR/../../../env-utils/setup_env_vars.sh"
+
+pushd "$THIS_DIR/.." >/dev/null
+  "$INSTALL_NODE_MODULES"
+popd >/dev/null
+
+exec "$FLOW_NODE_BINARY" "$THIS_DIR/generate-tests.js" "$@"

codegen/package.json

@@ -0,0 +1,7 @@
+{
+  "dependencies": {
+    "jscodeshift": "^0.6.2",
+    "nullthrows": "^1.1.0"
+  },
+  "private": true
+}