grokify/mogo

package main

import (
    "fmt"
    "log"

    "github.com/grokify/mogo/image/imageutil"
    "github.com/grokify/mogo/log/logutil"
    flags "github.com/jessevdk/go-flags"
)

type cliOptions struct {
    Input    string `short:"i" long:"input dir/file" description:"A dir or file" value-name:"FILE" required:"true"`
    Output   string `short:"o" long:"output dir/filefile" description:"A dir or file" required:"true"`
    Quality  int    `short:"q" long:"quality" description:"Quality"`
    WidthMin int    `short:"2" long:"width-minimum" description:"Resize to minimum width"`
}

func main() {
    opts := cliOptions{}
    _, err := flags.Parse(&opts)
    if err != nil {
        log.Fatal(err)
    }

    img, format, err := imageutil.ReadImageHTTP(opts.Input)
    logutil.FatalErr(err)
    fmt.Printf("GOT: [%s]\n", format)
    if opts.WidthMin > 0 {
        img = imageutil.ResizeMin(uint(opts.WidthMin), 0, img, imageutil.ScalerBest())
    }

    im := imageutil.Image{Image: img}
    err = im.WriteJPEGFileSimple(opts.Output, opts.Quality)
    logutil.FatalErr(err)
    fmt.Printf("Wrote [%s]\n", opts.Output)
    fmt.Println("DONE")
}