#!/bin/bash

SCR=$(basename $0)

unset IFS

function usage()
{
    echo "$SCR: usage $SCR -x executable "
    echo "                                 -i icon"
    echo "                                 -o app"
    echo "                                 -v version"
    echo "                                 -n bundle_identifier"
    echo "                                 -c creator_code (4 chars)"
}

function log()
{
    echo "$SCR: $*"
}

while getopts x:i:o:v:n:c: arg ; do
    case "$arg" in
        x)
            EXE="$OPTARG"
            ;;
        i)
            ICON="$OPTARG"
            ;;
        o)
            APP="$OPTARG".app
            ;;
        v)
            VERSION="$OPTARG"
            ;;
        n)
            BUNDLE_ID="$OPTARG"
            ;;
        c)
            CREATOR="$OPTARG"
            ;;
        *)
            usage
            exit 1
            ;;
    esac
done

if [ -z "$EXE" -o -z "$ICON" -o -z "$APP" \
        -o -z "$VERSION" -o -z "$BUNDLE_ID" -o -z "$CREATOR" ] ; then
    usage
    exit 1
fi

APPNAME=$(basename "$APP" .app)
EXENAME=$(basename "$EXE")

log Generating $APPNAME from $EXE

mkdir -p "$APP/Contents"
mkdir -p "$APP/Contents/MacOS"
mkdir -p "$APP/Contents/MacOS/lib"

# Copy executable
#
cp "$EXE" "$APP/Contents/MacOS"

# Create icons
#
convert $ICON -resize 512x512 "$APP/Contents/$APPNAME.png"

# Create the plist file
#
cat > "$APP/Contents/Info.plist" << EOF
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleName</key>
<string>$APPNAME</string>
<key>CFBundleDisplayName</key>
<string>$APPNAME</string>
<key>CFBundleIdentifier</key>
<string>$BUNDLE_ID</string>
<key>CFBundleVersion</key>
<string>$VERSION</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleSignature</key>
<string>$CREATOR</string>
<key>CFBundleExecutable</key>
<string>$EXENAME</string>
</dict>
</plist>
EOF