// Parses command line flags
func parseFlags() (cbconvert.Options, []string) {
opts := cbconvert.Options{}
var args []string
kingpin.Version("CBconvert 0.5.0")
kingpin.CommandLine.Help = "Comic Book convert tool."
kingpin.UsageTemplate(kingpin.CompactUsageTemplate)
kingpin.Flag("outdir", "Output directory").Default(".").StringVar(&opts.Outdir)
kingpin.Flag("size", "Process only files larger then size (in MB)").Default(strconv.Itoa(0)).Int64Var(&opts.Size)
kingpin.Flag("recursive", "Process subdirectories recursively").BoolVar(&opts.Recursive)
kingpin.Flag("quiet", "Hide console output").BoolVar(&opts.Quiet)
convert := kingpin.Command("convert", "Convert archive or document (default command)").Default()
convert.Arg("args", "filename or directory").Required().ExistingFilesOrDirsVar(&args)
convert.Flag("width", "Image width").Default(strconv.Itoa(0)).IntVar(&opts.Width)
convert.Flag("height", "Image height").Default(strconv.Itoa(0)).IntVar(&opts.Height)
convert.Flag("fit", "Best fit for required width and height").BoolVar(&opts.Fit)
convert.Flag("format", "Image format, valid values are jpeg, png, gif, tiff, bmp").Default("jpeg").StringVar(&opts.Format)
convert.Flag("quality", "JPEG image quality").Default(strconv.Itoa(jpeg.DefaultQuality)).IntVar(&opts.Quality)
convert.Flag("filter", "0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos").Default(strconv.Itoa(cbconvert.Linear)).IntVar(&opts.Filter)
convert.Flag("cover", "Convert cover image (use --no-cover if you want to exclude cover)").Default("true").BoolVar(&opts.ConvertCover)
convert.Flag("rgb", "Convert images that have RGB colorspace (use --no-rgb if you only want to convert grayscaled images)").Default("true").BoolVar(&opts.RGB)
convert.Flag("nonimage", "Leave non image files in archive (use --no-nonimage to remove non image files from archive)").Default("true").BoolVar(&opts.NonImage)
convert.Flag("grayscale", "Convert images to grayscale (monochromatic)").BoolVar(&opts.Grayscale)
convert.Flag("rotate", "Rotate images, valid values are 0, 90, 180, 270").Default(strconv.Itoa(0)).IntVar(&opts.Rotate)
convert.Flag("flip", "Flip images, valid values are none, horizontal, vertical").Default("none").StringVar(&opts.Flip)
convert.Flag("brightness", "Adjust brightness of the images, must be in range (-100, 100)").Default(strconv.Itoa(0)).Float64Var(&opts.Brightness)
convert.Flag("contrast", "Adjust contrast of the images, must be in range (-100, 100)").Default(strconv.Itoa(0)).Float64Var(&opts.Contrast)
convert.Flag("suffix", "Add suffix to file basename").StringVar(&opts.Suffix)
convert.Flag("levels-inmin", "Shadow input value").Default(strconv.Itoa(0)).Float64Var(&opts.LevelsInMin)
convert.Flag("levels-gamma", "Midpoint/Gamma").Default(strconv.Itoa(1.00)).Float64Var(&opts.LevelsGamma)
convert.Flag("levels-inmax", "Highlight input value").Default(strconv.Itoa(255)).Float64Var(&opts.LevelsInMax)
convert.Flag("levels-outmin", "Shadow output value").Default(strconv.Itoa(0)).Float64Var(&opts.LevelsOutMin)
convert.Flag("levels-outmax", "Highlight output value").Default(strconv.Itoa(255)).Float64Var(&opts.LevelsOutMax)
cover := kingpin.Command("cover", "Extract cover")
cover.Arg("args", "filename or directory").Required().ExistingFilesOrDirsVar(&args)
cover.Flag("width", "Image width").Default(strconv.Itoa(0)).IntVar(&opts.Width)
cover.Flag("height", "Image height").Default(strconv.Itoa(0)).IntVar(&opts.Height)
cover.Flag("fit", "Best fit for required width and height").BoolVar(&opts.Fit)
cover.Flag("quality", "JPEG image quality").Default(strconv.Itoa(jpeg.DefaultQuality)).IntVar(&opts.Quality)
cover.Flag("filter", "0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos").Default(strconv.Itoa(cbconvert.Linear)).IntVar(&opts.Filter)
thumbnail := kingpin.Command("thumbnail", "Extract cover thumbnail (freedesktop spec.)")
thumbnail.Arg("args", "filename or directory").Required().ExistingFilesOrDirsVar(&args)
thumbnail.Flag("outfile", "Output file").Default("").StringVar(&opts.Outfile)
thumbnail.Flag("width", "Image width").Default(strconv.Itoa(0)).IntVar(&opts.Width)
thumbnail.Flag("height", "Image height").Default(strconv.Itoa(0)).IntVar(&opts.Height)
thumbnail.Flag("fit", "Best fit for required width and height").BoolVar(&opts.Fit)
thumbnail.Flag("filter", "0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos").Default(strconv.Itoa(cbconvert.Linear)).IntVar(&opts.Filter)
switch kingpin.Parse() {
case "cover":
opts.Cover = true
case "thumbnail":
opts.Thumbnail = true
}
return opts, args
}
