Fix flow build

Author: devongovett

build-flow.js

@@ -0,0 +1,12 @@
+const fs = require('fs');
+
+let index = fs.readFileSync(__dirname + '/node/index.d.ts', 'utf8');
+index = '// @flow\n' + index;
+index = index.replace(/export interface (.*?) \{((?:.|\n)*?)\}/g, 'export type $1 = {|$2|};');
+index = index.replace(/export declare function/g, 'declare export function');
+
+let targets = fs.readFileSync(__dirname + '/node/targets.d.ts', 'utf8');
+targets = targets.replace(/export interface (.*?) \{((?:.|\n)*?)\}/g, 'export type $1 = {|$2|};');
+index = index.replace("import type {Targets} from './targets';", targets);
+
+fs.writeFileSync(__dirname + '/node/index.js.flow', index);

build.js

@@ -1,5 +1,4 @@
 const { spawn, execSync } = require('child_process');
-const fs = require('fs');
 
 let release = process.argv.includes('--release');
 build().catch((err) => {
@@ -31,8 +30,6 @@ async function build() {
     yarn.on('error', reject);
     yarn.on('close', resolve);
   });
-
-  buildFlowTypes();
 }
 
 // This forces Clang/LLVM to be used as a C compiler instead of GCC.
@@ -47,16 +44,3 @@ function setupMacBuild() {
   process.env.CFLAGS = `-isysroot ${sysRoot} -isystem ${sysRoot}`;
   process.env.MACOSX_DEPLOYMENT_TARGET = '10.9';
 }
-
-function buildFlowTypes() {
-  let index = fs.readFileSync(__dirname + '/node/index.d.ts', 'utf8');
-  index = '// @flow\n' + index;
-  index = index.replace(/export interface (.*?) \{((?:.|\n)*?)\}/g, 'export type $1 = {|$2|};');
-  index = index.replace(/export declare function/g, 'declare export function');
-
-  let targets = fs.readFileSync(__dirname + '/node/targets.d.ts', 'utf8');
-  targets = targets.replace(/export interface (.*?) \{((?:.|\n)*?)\}/g, 'export type $1 = {|$2|};');
-  index = index.replace("import type {Targets} from './targets';", targets);
-
-  fs.writeFileSync(__dirname + '/node/index.js.flow', index);
-}

package.json

@@ -50,8 +50,9 @@
     "puppeteer": "^12.0.1"
   },
   "scripts": {
-    "build": "node build.js",
-    "build-release": "node build.js --release",
+    "build": "node build.js && node build-flow.js",
+    "build-release": "node build.js --release && node build-flow.js",
+    "prepublishOnly": "node build-flow.js",
     "wasm:build": "wasm-pack build node --target nodejs",
     "wasm:build-release": "wasm-pack build node --target nodejs --release",
     "wasm-browser:build": "wasm-pack build node --target web",