crx/buildcrx.sh

   1 #!/bin/bash
   2 #
   3 # Build extension crx file automatically
   4 #
   5 # Version: 0.0.1
   6 # Author: kodango <dangoakachan@foxmail.com>
   7 # Homepage: http://kodango.com/buildcrx
   8 #
   9
  10 function usage()
  11 {
  12     cat << EOF
  13 Usage: `basename $0` [OPTIONS]
  14
  15 Options:
  16   -d     specify the extension directory, required
  17   -p     specify the pem file, optional
  18   -o     specify the output directory, optional
  19   -n     specify the build extension name, optional
  20   -e     specify the exclude pattern like grep, optional
  21   -h     show this help message
  22 EOF
  23 }
  24
  25 if [ $# -eq 0 ]; then
  26     usage
  27     exit
  28 fi
  29
  30 while getopts ":d:p:o:n:e:h" opt; do
  31     case $opt in
  32         d)
  33             ext_dir=$OPTARG;;
  34         p)
  35             pem_file=$OPTARG;;
  36         o)
  37             output_dir=$OPTARG;;
  38         n)
  39             ext_name=$OPTARG;;
  40         e)
  41             exclude_pattern=$OPTARG;;
  42         h)
  43             usage;;
  44         \?)
  45             echo "[ERROR] Invalid option: -$OPTARG" >&2
  46             exit 1;;
  47         :)
  48             echo "[ERROR] Option -$OPTARG requires an argument." >&2
  49             exit 1;;
  50     esac
  51 done
  52
  53 if [ ! -d "$ext_dir" ]; then
  54     echo "[ERROR] Extension directory '$ext_dir' doesn't exist!" >&2
  55     exit 1
  56 fi
  57
  58 if [ ! -f "$pem_file" ]; then
  59     echo "[WARNING] Pem file doesn't exist, do you miss it?"
  60 fi
  61
  62 if [ -z "$output_dir" ]; then
  63     output_dir="./output"
  64 fi
  65
  66 if [ ! -d "$output_dir" ]; then
  67     mkdir -p $output_dir
  68 fi
  69
  70 if [ -z "$ext_name" ]; then
  71     ext_name=`basename $ext_dir`
  72 fi
  73
  74 cwd=`pwd`
  75 build="$cwd/build"
  76 build_ext="$build/$ext_name"
  77
  78 echo "[INFO] Crete build directory"
  79 rm -rf $build
  80 mkdir -p $build_ext
  81
  82 echo "[INFO] Copy extension files to build directory" && (
  83     cd $ext_dir
  84
  85     if [ -n "$exclude_pattern" ]; then
  86         find . | grep -vE "$exclude_pattern" | cpio -pdm $build_ext 2>/dev/null
  87     else
  88         find . | cpio -pdm $build_ext
  89     fi
  90 )
  91
  92 echo -n "[INFO] Search the current build version in manifest.json: "
  93 version=`awk -F'"' '/"version"/{print $4}' $build_ext/manifest.json`
  94 echo $version
  95
  96 echo -n "[INFO] Search the update url in manifest.json: "
  97 update_url=`awk -F'"' '/"update_url"/{print $4}' $build_ext/manifest.json`
  98 echo $update_url
  99
 100 if [ -n "$update_url" ]; then
 101     update_file="$output_dir/${update_url##*/}"
 102     curl --silent $update_url -o $update_file
 103
 104     sed -i -r "s/(<updatecheck.*version=)[^ /]+/\1'$version'/" $update_file
 105     echo "[INFO] Update the version number in $update_file to $version"
 106 fi
 107
 108 echo "[DEBUG] Package crx file with crxmake.sh script"
 109
 110 # Codes below are taken from crxmake.sh
 111 # http://code.google.com/p/chromium/issues/attachmentText?id=15059&aid=-2305436989939443553&name=crxmake.sh
 112
 113 crx="$output_dir/$ext_name.crx"
 114 pub="$build/$ext_name.pub"
 115 sig="$build/$ext_name.sig"
 116 zip="$build/$ext_name.zip"
 117
 118 # zip up the crx dir
 119 (cd "$build_ext" && zip -qr -9 -X "$zip" .)
 120
 121 # signature
 122 openssl sha1 -sha1 -binary -sign "$pem_file" < "$zip" > "$sig"
 123
 124 # public key
 125 openssl rsa -pubout -outform DER < "$pem_file" > "$pub" 2>/dev/null
 126
 127 # Take "abcdefgh" and return it as "ghefcdab"
 128 function byte_swap ()
 129 {
 130     echo "${1:6:2}${1:4:2}${1:2:2}${1:0:2}"
 131 }
 132
 133 crmagic_hex="4372 3234" # Cr24
 134 version_hex="0200 0000" # 2
 135 pub_len_hex=$(byte_swap $(printf '%08x\n' $(ls -l "$pub" | awk '{print $5}')))
 136 sig_len_hex=$(byte_swap $(printf '%08x\n' $(ls -l "$sig" | awk '{print $5}')))
 137
 138 (
 139     echo "$crmagic_hex $version_hex $pub_len_hex $sig_len_hex" | xxd -r -p
 140     cat "$pub" "$sig" "$zip"
 141 ) > "$crx"
 142
 143 echo "[INFO] $crx is packaged successfully"