Deploy to Cloudflare Workers: content-addressed assets, staged preview tests, rollback notes

web/build.sh

@@ -1,13 +1,24 @@
 #!/bin/sh
-# Builds web/dist: the gallery as wasm plus the page shell.
+# Builds web/dist; files under a/ are named by content.
 set -eu
 cd "$(dirname "$0")/.."
-build=$(git rev-parse --short HEAD)-$(date +%s)
-rm -rf web/dist
-mkdir -p web/dist
-GOOS=js GOARCH=wasm go build -trimpath -ldflags="-s -w" -o web/dist/app.wasm ./cmd/web
-cp "$(go env GOROOT)/lib/wasm/wasm_exec.js" web/dist/
-for f in index.html main.js; do
-  sed "s/__BUILD__/$build/g" "web/$f" > "web/dist/$f"
-done
-echo "web/dist built: $build, app.wasm $(wc -c < web/dist/app.wasm) bytes"
+d=web/dist
+rm -rf $d
+mkdir -p $d/a
+GOOS=js GOARCH=wasm go build -trimpath -ldflags="-s -w" -o $d/app.wasm ./cmd/web
+cp "$(go env GOROOT)/lib/wasm/wasm_exec.js" $d/
+size=$(wc -c < $d/app.wasm | tr -d ' ')
+sed "s/__SIZE__/$size/g" web/main.js > $d/main.js
+# name moves a file into a/ by its content hash.
+name() {
+  to=a/$1.$(git hash-object "$d/$2" | cut -c1-12).$3
+  mv "$d/$2" "$d/$to"
+  echo "$to"
+}
+wasm=$(name app app.wasm wasm)
+sed -i.bak "s#__WASM__#$wasm#g" $d/main.js && rm $d/main.js.bak
+exec=$(name wasm_exec wasm_exec.js js)
+main=$(name main main.js js)
+sed "s#__EXEC__#$exec#g; s#__MAIN__#$main#g" web/index.html > $d/index.html
+cp web/_headers $d/
+echo "web/dist built: $main $wasm ($size bytes)"