a script for generating the right size images for the appStore assets

AppStoreImagesGenerator.sh

#!/bin/bash

set -e

SRC_FILE="$1"
DST_PATH="$2"

VERSION=1.0.0

info() {
     local green="\033[1;32m"
     local normal="\033[0m"
     echo -e "[${green}INFO${normal}] $1"
}

error() {
     local red="\033[1;31m"
     local normal="\033[0m"
     echo -e "[${red}ERROR${normal}] $1"
}

usage() {
cat << EOF
VERSION: $VERSION
USAGE:
    $0 srcfile dstpath

DESCRIPTION:
    This script aim to generate iOS assets for the appstore easier and simply.

    srcfile - The source png image.
    dstpath - The destination path where the images generate to.

    This script is depend on ImageMagick. So you must install ImageMagick first
    You can use 'sudo brew install ImageMagick' to install it

EXAMPLE:
    $0 1024.png ~/123
EOF
}

# Check ImageMagick
command -v convert >/dev/null 2>&1 || { error >&2 "The ImageMagick is not installed. Please use brew to install it first."; exit -1; }

# Check param
if [ $# != 2 ];then
    usage
    exit -1
fi

# Check dst path whether exist.
if [ ! -d "$DST_PATH" ];then
    mkdir -p "$DST_PATH"
fi


info "Generate ${SRC_FILE%.*}_ipad.png.."
convert "$SRC_FILE" -resize 1536x2048! "$DST_PATH/${SRC_FILE%.*}_ipad.png"
info "Generate ${SRC_FILE%.*}_ipadPro.png.."
convert "$SRC_FILE" -resize 2048x2732! "$DST_PATH/${SRC_FILE%.*}_ipadPro.png"

info "Generate ${SRC_FILE%.*}_iPhone4.png.."
convert "$SRC_FILE" -resize 640x960! "$DST_PATH/${SRC_FILE%.*}_iPhone4.png"

info "Generate ${SRC_FILE%.*}_iPhone5.png.."
convert "$SRC_FILE" -resize 640x1036! "$DST_PATH/${SRC_FILE%.*}_iPhone5.png"

info "Generate ${SRC_FILE%.*}_iPhone6.png.."
convert "$SRC_FILE" -resize 750x1334! "$DST_PATH/${SRC_FILE%.*}_iPhone6.png"

info "Generate ${SRC_FILE%.*}_iPhone6Plus.png.."
convert "$SRC_FILE" -resize 1242x2208! "$DST_PATH/${SRC_FILE%.*}_iPhone6Plus.png"

info 'Generate Done.'