Move cxx-api scripts under scripts/, add README (#52467)

Summary:
Pull Request resolved: #52467

Moves the WIP `cxx-public-api` project under `scripts/cxx-api/`, add minimal README docs.

Changelog: [Internal]

Reviewed By: christophpurrer

Differential Revision: D77865490

fbshipit-source-id: ce49845386c468ee7422b864c49f2a8c9eed5a70

Author: huntie

package.json

@@ -11,6 +11,7 @@
     "build-types": "node ./scripts/build-types",
     "clang-format": "clang-format -i --glob=*/**/*.{h,cpp,m,mm}",
     "clean": "node ./scripts/build/clean.js",
+    "cxx-api-build": "node ./scripts/cxx-api/public-api.js",
     "flow-check": "flow check",
     "flow": "flow",
     "format-check": "prettier --list-different \"./**/*.{js,md,yml,ts,tsx}\"",
@@ -82,6 +83,7 @@
     "glob": "^7.1.1",
     "hermes-eslint": "0.29.1",
     "hermes-transform": "0.29.1",
+    "ini": "^5.0.0",
     "inquirer": "^7.1.0",
     "jest": "^29.7.0",
     "jest-config": "^29.7.0",

private/cxx-public-api/package.json

@@ -0,0 +1,21 @@
+# scripts/cxx-api
+
+[Experimental] Build scripts for React Native's C++ / Objective-C / Objective-C++ API.
+
+## Usage
+
+#### Build API snapshot
+
+Builds a `ReactNativeCPP.api` file to the `output` location configured in `public-api.conf`.
+
+```sh
+yarn cxx-api-build
+```
+
+#### Check API snapshot
+
+Prints a warning message with the API snapshot diff since the previous commit.
+
+```sh
+./scripts/cxx-api/check-api.sh
+```

scripts/cxx-api/README.md

@@ -73,8 +73,8 @@ pushd "$FBSOURCE_ROOT/xplat/js/react-native-github" || exit $ERR_CODE_CANT_FIND_
 trap cleanup EXIT
 
 # TODO: This operates in the sandbox and can't modify files in the repository, which we need for change detection
-# buck2 run //xplat/js/react-native-github/private/cxx-public-api:public-api
-REPO_RELATIVE_DIR="private/cxx-public-api"
+# buck2 run //xplat/js/react-native-github/scripts/cxx-api:public-api
+REPO_RELATIVE_DIR="scripts/cxx-api"
 (cd "$REPO_RELATIVE_DIR" && $YARN_BINARY install)
 $NODE_BINARY "$REPO_RELATIVE_DIR/public-api.js"
 echo

private/cxx-public-api/ReactNativeCPP.api scripts/cxx-api/ReactNativeCPP.apiprivate/cxx-public-api/ReactNativeCPP.api renamed to scripts/cxx-api/ReactNativeCPP.api

@@ -22,6 +22,6 @@ packages/react-native/Libraries/WebSocket/*
 packages/react-native/Libraries/Wrapper/Example/*
 
 [settings]
-output=private/cxx-public-api/ReactNativeCPP.api
+output=scripts/cxx-api/ReactNativeCPP.api
 ; clang=$HOME/some/path/to/clang
 ; clang-format=$HOME/some/path/to/clang-format

private/cxx-public-api/check-api.sh scripts/cxx-api/check-api.shprivate/cxx-public-api/check-api.sh renamed to scripts/cxx-api/check-api.sh

@@ -34,13 +34,13 @@ const isTTY = process.stdout.isTTY;
 
 /*::
 type Config = {
-    include: string[],
-    exclude: string[],
-    settings: {
-        output: string,
-        clang?: string,
-        'clang-format'?: string,
-    }
+  include: string[],
+  exclude: string[],
+  settings: {
+    output: string,
+    clang?: string,
+    'clang-format'?: string,
+  },
 };
 
 type ParsedConfig = {