make-app.sh

#!/bin/sh
# Inspired by https://gist.github.com/demonbane/1065791

function pure_version() {
  echo '0.1'
}

function version() {
  echo "make-app $(pure_version)"
}

function usage() {
  version
  echo "Create a Fluid-style app launcher for single-window Chrome instances on OSX"
  echo "Usage: $(basename $0) AppName http://url icon.png"
  echo "Options:"
  echo "  --app-root"
  echo "      Path to where you would like the app installed"
  echo "      Defaults to '/Applications'"
  echo "  --chrome-path"
  echo "      Path to Chrome binary"
  echo "      Defaults to '/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome'"
  echo "  -h, --help        display this help"
  echo "  --version         show tool version number"
  exit 0
}

APP_ROOT="/Applications"
CHROME_PATH="/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome"

while test "${1:0:1}" = "-"; do
  case $1 in
    --app-root)
      APP_ROOT="$2"
      shift; shift;;
    --chrome-path)
      CHROME_PATH="$2"
      shift; shift;;
    -h | --help)
      usage;;
    --version)
      version; exit 0;;
    -*)
      echo "Unknown option $1. Run with --help for help."
      exit 1;;
  esac
done

test -z "$3" && {
  echo "Not enough arguments. Invoke with --help for help."
  exit 1
}

NAME="$1" # e.g. GCal
URL="$2"  # e.g. https://www.google.com/calendar/render
ICON="$3" # e.g. /Users/username/Desktop/icon.png

# various paths used when creating the app
RESOURCE_PATH="$APP_ROOT/$NAME.app/Contents/Resources"
EXEC_PATH="$APP_ROOT/$NAME.app/Contents/MacOS"
PROFILE_PATH="$APP_ROOT/$NAME.app/Contents/Profile"
PLIST_PATH="$APP_ROOT/$NAME.app/Contents/Info.plist"

# make the directories
mkdir -p ${RESOURCE_PATH} ${EXEC_PATH} ${PROFILE_PATH}

# convert the icon and copy into Resources
if [ -f ${ICON} ] ; then
    sips -s format tiff ${ICON} --out ${RESOURCE_PATH}/icon.tiff --resampleWidth 128 >& /dev/null
    tiff2icns -noLarge ${RESOURCE_PATH}/icon.tiff >& /dev/null
fi

# create the executable
cat >${EXEC_PATH}/${NAME} <<EOF
#!/bin/sh
exec ${CHROME_PATH} --app="${URL}" --user-data-dir="${PROFILE_PATH}" --no-default-browser-check --always-authorize-plugins "\$@"
EOF
chmod +x ${EXEC_PATH}/${NAME}

# create the Info.plist
cat > ${PLIST_PATH} <<EOF
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" “http://www.apple.com/DTDs/PropertyList-1.0.dtd”>
<plist version=”1.0″>
<dict>
<key>CFBundleExecutable</key>
<string>${NAME}</string>
<key>CFBundleIconFile</key>
<string>icon</string>
</dict>
</plist>
EOF