chore: add build script

Signed-off-by: Aron Carroll <[email protected]>

Author: aron

build.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+# Generates browser compatible versions of the package with dependencies
+# bundled as well as the type declaration.
+set -euo pipefail
+
+entrypoint=./src/opa.js
+outdir=./dist
+package=$(node -pe 'require("./package.json").name.split("/").pop()')
+
+if [[ ! -x $(npm bin)/esbuild || ! -x $(npm bin)/tsc ]]; then
+  echo "Installing dependencies…"
+  npm install
+fi
+
+echo "Generating default browser build…"
+$(npm bin)/esbuild $entrypoint \
+  --outfile=$outdir/$package-browser.js \
+  --bundle \
+  --sourcemap \
+  --minify \
+  --format=iife \
+  --platform=browser \
+  --define:global=window \
+  --global-name=opa
+
+echo "Generating esm browser build…"
+$(npm bin)/esbuild $entrypoint \
+  --outfile=$outdir/$package-browser.esm.js \
+  --bundle \
+  --sourcemap \
+  --minify \
+  --format=esm \
+  --platform=browser \
+  --define:global=window
+
+echo "Generating TypeScript declaration file…"
+$(npm bin)/tsc ./src/index.mjs \
+  --declaration \
+  --allowJs \
+  --emitDeclarationOnly \
+  --outDir $outdir