🎨 - Postinstall Script

Author: Roland Peelen

postinstall.js

@@ -0,0 +1,51 @@
+const path = require("path");
+const fs = require("fs");
+
+const installMacLinuxBinary = (binary) => {
+  const source = path.join(__dirname, binary);
+  if (fs.existsSync(source)) {
+    // mac and linux support extension-less executables
+    // so just overwrite the shell script
+    const target = path.join(__dirname, "rewatch");
+    fs.renameSync(source, target);
+
+    // The ppx should be executable in the bundle, but just in case
+    fs.chmodSync(target, 0777);
+  } else {
+    // assume we're in dev mode - nothing will break if the script
+    // isn't overwritten, it will just be slower
+  }
+};
+
+const installWindowsBinary = () => {
+  const source = path.join(__dirname, "ppx-windows.exe");
+  if (fs.existsSync(source)) {
+    const target = path.join(__dirname, "rewatch.exe");
+    fs.renameSync(source, target);
+
+    // windows scripts use a different file extension to executables
+    // so we delete the script to make sure windows uses the exe now
+    const windowsScript = path.join(__dirname, "ppx.cmd");
+    fs.unlinkSync(windowsScript);
+  } else {
+    // assume we're in dev mode - nothing will break if the script
+    // isn't overwritten, it will just be slower
+  }
+};
+
+switch (process.platform) {
+  case "linux":
+    installMacLinuxBinary("rewatch-linux");
+    break;
+  case "darwin":
+    installMacLinuxBinary("rewatch-macos");
+    break;
+  case "win32":
+    installWindowsBinary();
+    break;
+  default:
+    // This won't break the installation because the `ppx` shell script remains
+    // but that script will throw an error in this case anyway
+    console.warn(`No release available for "${process.platform}"`);
+    process.exit(1);
+}