Refactor esbuild options into a reusable function

build/esbuild/bundle.ts

@@ -2,6 +2,7 @@ import { BuildOptions, buildSync } from "esbuild";
 import { writeFileSync } from "fs";
 import { sync } from "glob";
 import { join } from "path";
+import { getEsbuildOptions } from "../../utils/esbuild";
 import { getRuntimeConfig, RuntimeConfig } from "../../utils/runtimeConfig";
 
 const bundle = (
@@ -24,16 +25,7 @@ const bundle = (
 
   writeFileSync(join(outDir, "functions.json"), JSON.stringify(runtimeConfigs, null, 2));
   runtimeConfigs.forEach(config => {
-    buildSync({
-      entryPoints: [config.file],
-      absWorkingDir: process.cwd(),
-      format: "cjs",
-      bundle: true,
-      platform: "node",
-      outfile: join(outDir, `functions/${config.name}/index.js`),
-      sourcemap: "both",
-      ...esbuildOptions,
-    });
+    buildSync(getEsbuildOptions(config, outDir, esbuildOptions));
   });
 };
 

utils/esbuild.ts

@@ -0,0 +1,20 @@
+import { BuildOptions } from "esbuild";
+import { join } from "node:path";
+import { RuntimeConfig } from "./runtimeConfig";
+
+export function getEsbuildOptions(
+  functionConfig: RuntimeConfig,
+  outputDirectory: string,
+  additionalOptions?: Partial<BuildOptions>,
+): Partial<BuildOptions> {
+  return {
+    entryPoints: [functionConfig.file],
+    absWorkingDir: process.cwd(), // We should probably infer the working directory from the cloudseed.json file
+    format: "cjs",
+    bundle: true,
+    platform: "node",
+    outfile: join(outputDirectory, `functions/${functionConfig.name}/index.js`),
+    sourcemap: "both",
+    ...additionalOptions,
+  };
+}