testbed.command

#!/bin/bash
# Launches an isolated Chrome with ModHeader loaded, so you can build test configs
# by hand and then export them.
#
#   ./testbed.command            open the testbed browser
#   ./testbed.command --export   export whatever is currently in it
#
# The browser profile persists at .work/testbed-profile, so configs you create
# survive between runs.
set -e
cd "$(dirname "$0")"

EXTENSION="$PWD/.work/ModHeader-Clean"
PROFILE="$PWD/.work/testbed-profile"
BROWSERS="$PWD/.work/browsers"

if [ "$1" = "--export" ]; then
  # --browser restricts the scan to the testbed profile, which findModHeaderStores
  # labels by its directory name, so real browser profiles are left out.
  exec node src/cli.mjs \
    --user-data-dir "$PROFILE" \
    --browser "$(basename "$PROFILE")" \
    --out-dir "$PWD/testbed-export"
fi

# Chrome 137+ ignores --load-extension, so this needs a Chrome for Testing build.
if [ ! -d "$BROWSERS/chrome" ]; then
  echo "Downloading Chrome for Testing (one time, ~150MB)..."
  npx -y @puppeteer/browsers install chrome@stable --path "$BROWSERS"
fi
CHROME=$(find "$BROWSERS/chrome" -type f \
  \( -name "Google Chrome for Testing" -o -name "chrome" \) -perm -u+x | head -1)
if [ -z "$CHROME" ]; then
  echo "Could not find a Chrome for Testing binary under $BROWSERS/chrome"
  exit 1
fi

if [ ! -f "$EXTENSION/manifest.json" ]; then
  echo "Fetching ModHeader (community build with the tracking SDK removed)..."
  git clone --depth 1 https://github.com/T1sts/ModHeader-Clean.git "$EXTENSION"
fi

# The extension id is derived from the extension's absolute path.
EXT_ID=$(node -e "
  const {createHash}=require('crypto');
  const d=createHash('sha256').update(process.argv[1],'utf8').digest('hex').slice(0,32);
  console.log([...d].map(c=>String.fromCharCode(parseInt(c,16)+97)).join(''));
" "$EXTENSION")

mkdir -p "$PROFILE"
echo "Profile:   $PROFILE"
echo "ModHeader: chrome-extension://$EXT_ID/src/app_v1.html"
echo
echo "Build whatever profiles you want, then quit the browser and run:"
echo "  ./testbed.command --export"
echo

"$CHROME" \
  --user-data-dir="$PROFILE" \
  --load-extension="$EXTENSION" \
  --disable-extensions-except="$EXTENSION" \
  --no-first-run \
  --no-default-browser-check \
  --disable-background-networking \
  --disable-sync \
  "chrome-extension://$EXT_ID/src/app_v1.html"