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a tiny pet with a GPT-2 brain, living in your browser
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667#!/bin/bash# Stage and serve a local preview of the site (site/build.sh) with the# cross-origin isolation headers, so WebAssembly threads work.## Usage: dev-site.sh DIR stage into DIR and serve on 127.0.0.1:$PORT# dev-site.sh DIR --rebuild rebuild the page and app only# (the server keeps running)## Required env:# MODEL an export directory from train/export.sh (symlinked, not copied)# RUNTIME the directory from train/vendor.sh# Optional env:# OLDER space-separated export directories staged as older brains the# app may keep running (to try the upgrade flow); newest first# PORT default 8765# BASE URL base path / directory for the site (default: pet)# MODEL_ID model directory name (default: basename of MODEL)# NEWS the upgrade dialog's "what's new" line (default: a test line)# FEATURES JSON list of features the current brain has (default: [])# TRAINED text for the page's "Trained" line (default: local build)# SOURCE URL for the page's source link (default: #)# ONNX_BYTES_PER_SECOND throttle model downloads (default: 0, unlimited)# The speed benchmark (test/bench.html) is served at /$BASE/bench.html.# Nothing is published anywhere; this is for local testing.set -euo pipefail[ $# -ge 1 ] || { sed -n '2,/^set -e/p' "$0" | sed '$d;s/^# \{0,1\}//' >&2; exit 2; }DIR=$(realpath -m "$1"): "${MODEL:?set MODEL to an export directory}" "${RUNTIME:?set RUNTIME to the vendored runtime directory}"HERE=$(cd "$(dirname "$0")" && pwd); REPO=$(dirname "$HERE")PORT=${PORT:-8765} BASE=${BASE:-pet}MODEL_ID=${MODEL_ID:-$(basename "$(realpath "$MODEL")")}ROOT=$DIR/$BASEmkdir -p "$ROOT"
# A release description for this preview (the real one is site/release.json).SIZE=$(wc -c < "$MODEL/onnx/model_q4.onnx" | tr -d ' ')python3 - "$DIR/release.json" "$MODEL_ID" "$SIZE" ${OLDER:-} <<'PY'import json, os, sysout, mid, size, *older = sys.argv[1:]json.dump({"modelId": mid, "size": int(size), "trained": os.environ.get("TRAINED", "local build"), "news": os.environ.get("NEWS", "A preview brain, for testing the upgrade."), "features": json.loads(os.environ.get("FEATURES", "[]")), "older": [{"id": os.path.basename(os.path.realpath(o)), "features": []} for o in older], "runtime": "runtime", "source": os.environ.get("SOURCE", "#")}, open(out, "w"))PYRELEASE=$DIR/release.json BASE=/$BASE/ "$REPO/site/build.sh" "$ROOT"[ "${2:-}" = "--rebuild" ] && exit 0
# Full previews refresh the local runtime exactly; published runtimes remain# immutable. Finish a fresh copy before removing the previous preview runtime.mkdir -p "$ROOT/runtime"RUNTIME_STAGE=$(mktemp -d "$ROOT/runtime/.runtime.partial.XXXXXX")trap 'rm -rf "$RUNTIME_STAGE"' EXITtrap 'exit 1' HUP INT TERMcp -a "$RUNTIME/." "$RUNTIME_STAGE/"rm -rf "$ROOT/runtime/runtime"mv "$RUNTIME_STAGE" "$ROOT/runtime/runtime"trap - EXIT HUP INT TERMfor m in "$MODEL" ${OLDER:-}; do id=$(basename "$(realpath "$m")"); [ "$m" = "$MODEL" ] && id=$MODEL_ID mkdir -p "$ROOT/models/$id/onnx" cp "$m"/*.json "$m"/SHA256SUMS "$ROOT/models/$id/" ln -sf "$(realpath "$m")"/onnx/*.onnx "$ROOT/models/$id/onnx/"doneecho "serving $DIR at http://127.0.0.1:$PORT/$BASE/"exec python3 "$HERE/serve.py" "$DIR" "$PORT"