package: build system

.gitignore

@@ -1,2 +1,3 @@
 node_modules
+dist
 package-lock.json

index.ts

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+import s2 from './s2/_index'
+
+export default { s2 }

package.json

@@ -1,14 +1,19 @@
 {
   "name": "s2",
   "version": "1.0.0",
+  "main": "dist/index.js",
+  "typings": "dist/index.d.ts",
+  "module": "dist/s2.esm.js",
   "scripts": {
+    "build": "tsdx build --entry index.ts",
     "test": "node --import tsx --test **/*_test.ts"
   },
   "author": "Peter Johnson",
   "license": "MIT",
   "description": "javascript port of s2 geometry",
   "devDependencies": {
     "@types/node": "^20.14.11",
+    "tsdx": "^0.14.1",
     "tsx": "^4.16.2"
   }
 }

s2/_index.ts

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+import * as cellid from './cellid'
+
+export default { cellid }

tsconfig.json

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+{
+  "exclude": ["**/*_test.ts"],
+  "compilerOptions": {
+    "module": "esnext",
+    "lib": ["dom", "esnext"],
+    "importHelpers": true,
+    // output .d.ts declaration files for consumers
+    "declaration": true,
+    // output .js.map sourcemap files for consumers
+    "sourceMap": true,
+    // match output dir to input dir. e.g. dist/index instead of dist/src/index
+    "rootDir": ".",
+    // stricter type-checking for stronger correctness. Recommended by TS
+    "strict": true,
+    // linter checks for common issues
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    // noUnused* overlap with @typescript-eslint/no-unused-vars, can disable if duplicative
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    // use Node's module resolution algorithm, instead of the legacy TS one
+    "moduleResolution": "node",
+    // interop between ESM and CJS modules. Recommended by TS
+    "esModuleInterop": true,
+    // significant perf increase by skipping checking .d.ts files, particularly those in node_modules. Recommended by TS
+    "skipLibCheck": true,
+    // error out if import and file system have a casing mismatch. Recommended by TS
+    "forceConsistentCasingInFileNames": true,
+    // `tsdx build` ignores this option, but it is commonly used when type-checking separately with `tsc`
+    "noEmit": true
+  }
+}