#!/bin/bash

echo About to create a chrome extension
rm -rf pnacl_${BUILD_NUMBER}.zip

mkdir -p pnacl_${BUILD_NUMBER}/pnacl/Release/

#copying required folders
cp -rf iguana/css pnacl_${BUILD_NUMBER}/
cp -rf iguana/js pnacl_${BUILD_NUMBER}/
cp -rf iguana/app pnacl_${BUILD_NUMBER}/
cp -rf iguana/confs pnacl_${BUILD_NUMBER}/
cp -rf iguana/fonts pnacl_${BUILD_NUMBER}/
cp -rf iguana/images pnacl_${BUILD_NUMBER}/
cp -rf iguana/help pnacl_${BUILD_NUMBER}/

cp -rf iguana/pnacl/Release/{iguana.nmf,iguana.pexe} pnacl_${BUILD_NUMBER}/pnacl/Release/

cd iguana
find . -maxdepth 1 \( -iname \*.js -o -iname \*.html -o -iname \*.ico -o -iname \*.json -o -iname \*.png \) -exec cp -r {} ../pnacl_${BUILD_NUMBER} \;
cd -

echo Listing the contents of pnacl_${BUILD_NUMBER}
ls -al pnacl_${BUILD_NUMBER}/

#echo Zipping now
#zip -r pnacl_${BUILD_NUMBER}.zip pnacl_${BUILD_NUMBER}/


# Purpose: Pack a Chromium extension directory into crx format
cp pnacl.pem pnacl_${BUILD_NUMBER}.pem

dir=pnacl_${BUILD_NUMBER}
key=pnacl_${BUILD_NUMBER}.pem

name=$(basename "$dir")
crx="$name.crx"
pub="$name.pub"
sig="$name.sig"
zip="$name.zip"
trap 'rm -f "$pub" "$sig" "$zip"' EXIT

# zip up the crx dir
cwd=$(pwd -P)
(cd "$dir" && zip -qr -9 -X "$cwd/$zip" .)

# signature
openssl sha1 -sha1 -binary -sign "$key" < "$zip" > "$sig"

# public key
openssl rsa -pubout -outform DER < "$key" > "$pub" 2>/dev/null

byte_swap () {
  # Take "abcdefgh" and return it as "ghefcdab"
  echo "${1:6:2}${1:4:2}${1:2:2}${1:0:2}"
}

crmagic_hex="4372 3234" # Cr24
version_hex="0200 0000" # 2
pub_len_hex=$(byte_swap $(printf '%08x\n' $(ls -l "$pub" | awk '{print $5}')))
sig_len_hex=$(byte_swap $(printf '%08x\n' $(ls -l "$sig" | awk '{print $5}')))
(
  echo "$crmagic_hex $version_hex $pub_len_hex $sig_len_hex" | xxd -r -p
  cat "$pub" "$sig" "$zip"
) > "$crx"
echo "Wrote $crx"