$ go get github.com/readpe/volu-img

The volu-img is a command line tool with two flags, these can be viewed using the --help flag as detailed below.

$ volu-img --help

Usage of ./volu-img:
  -i string
        json input file path
  -p string
        path to images (default ".")

The required -i flag requests the path to the JSON input file, whos format is detailed below. The -p flag request the path to the directory containing the source images, this option will default to the current working directory if no path is provided.

The details for each product image are provided in a JSON file for input using the -i command flag, this is required. The *.jpg files specified should be located withing the provided -p file path.

• sku: Represents the product code
• img: Is the "main" product image
• img_alts: List of product alternative images
• large, medium, small, tiny, thumb image sizes
  • If height or width is zero, the non-zero value will scale, maintaining aspect ratio. Equivalent to 'max height' or 'max width' option
  • If both height and width are non-zero, the maximum image dimension will scale. Equivalent to 'both' option

[
    {
        "sku":"PRODUCT-1",
        "img":"PRODUCT-1.jpg",
        "img_alts":[
            "PRODUCT-1-ALT.jpg"
        ],
        "large": { "width": 0, "height": 700},
        "medium": { "width": 400, "height": 400},
        "small": { "width": 500, "height": 500},
        "tiny": { "width": 100, "height": 100},
        "thumb": { "width": 0, "height": 50}
    },
    {
        "sku":"PRODUCT-2",
        "img":"PRODUCT-2.jpg",
        "img_alts":[
            "PRODUCT-2-ALT.jpg"
        ],
        "large": { "width": 0, "height": 700},
        "medium": { "width": 400, "height": 400},
        "small": { "width": 500, "height": 500},
        "tiny": { "width": 100, "height": 100},
        "thumb": { "width": 0, "height": 50}
    }
]

A new directory 'volu' will be created within the -p path provided, this directory will hold the resized images.

Image nameing convention is based on the following post:

https://helpcenter.volusion.com/en/articles/1773795-product-image-file-names

This program uses the github.com/nfnt/resize module for resizing.