Add isNinjaAvailable function

Author: kraenhansen

packages/react-native-node-api-cmake/src/ninja.ts

@@ -0,0 +1,39 @@
+import chalk from "chalk";
+import cp from "node:child_process";
+
+export function getNinjaVersion(): string | undefined {
+  try {
+    const ninjaVersion = cp
+      .execSync("ninja --version", {
+        encoding: "utf-8",
+        stdio: "pipe",
+      })
+      .trim();
+    return ninjaVersion;
+  } catch {
+    return undefined;
+  }
+}
+
+let ninjaAvailable: boolean | undefined;
+
+export function isNinjaAvailable(log = true): boolean {
+  if (typeof ninjaAvailable === "boolean") {
+    return ninjaAvailable;
+  }
+
+  const ninjaVersion = getNinjaVersion();
+  ninjaAvailable = typeof ninjaVersion === "string";
+
+  if (log && ninjaAvailable) {
+    console.log(chalk.dim(`Using Ninja ${ninjaVersion} for Android builds`));
+  } else if (log && !ninjaAvailable) {
+    console.log(
+      `Using Unix Makefiles as fallback, as Ninja was not found.\n${chalk.dim(
+        "Install Ninja for faster builds."
+      )}`
+    );
+  }
+
+  return ninjaAvailable;
+}