mirror of
https://github.com/axllent/goptimize.git
synced 2024-10-06 17:33:40 -04:00
184 lines
4.8 KiB
Go
184 lines
4.8 KiB
Go
package main
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import (
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"fmt"
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"os"
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"os/exec"
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"regexp"
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"runtime"
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"strconv"
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"sync"
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"github.com/axllent/ghru"
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"github.com/spf13/pflag"
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)
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var (
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quality int
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maxWidth int
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maxHeight int
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outputDir string
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preserveModTimes bool
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jpegoptim string
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jpegtran string
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optipng string
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pngquant string
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gifsicle string
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threads = 1
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version = "dev"
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)
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func main() {
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// set up new flag instance
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flag := pflag.NewFlagSet(os.Args[0], pflag.ExitOnError)
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// set the default help
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flag.Usage = func() {
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fmt.Println("Goptimize - downscales and optimizes images")
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fmt.Printf("\nUsage: %s [options] <images>\n", os.Args[0])
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fmt.Println("\nOptions:")
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flag.SortFlags = false
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flag.PrintDefaults()
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fmt.Println("\nExamples:")
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fmt.Printf(" %s image.png\n", os.Args[0])
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fmt.Printf(" %s -m 800x800 *.jpg\n", os.Args[0])
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fmt.Printf(" %s -o out/ -q 90 -m 1600x1600 *.jpg\n", os.Args[0])
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fmt.Println("\nDetected optimizers:")
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if err := displayDelectedOptimizer("jpegtran ", jpegtran); err != nil {
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displayDelectedOptimizer("jpegoptim", jpegoptim)
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}
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displayDelectedOptimizer("optipng ", optipng)
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displayDelectedOptimizer("pngquant ", pngquant)
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displayDelectedOptimizer("gifsicle ", gifsicle)
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}
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var maxSizes string
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var multiThreaded, update, showversion, showhelp bool
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flag.IntVarP(&quality, "quality", "q", 75, "quality, JPEG only")
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flag.StringVarP(&maxSizes, "max", "m", "", "downscale to a maximum width & height in pixels (<width>x<height>)")
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flag.StringVarP(&outputDir, "out", "o", "", "output directory (default overwrites original)")
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flag.BoolVarP(&preserveModTimes, "preserve", "p", true, "preserve file modification times")
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flag.BoolVarP(&update, "update", "u", false, "update to latest release")
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flag.BoolVarP(&multiThreaded, "threaded", "t", false, "run multi-threaded (use all CPU cores)")
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flag.BoolVarP(&showversion, "version", "v", false, "show version number")
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flag.BoolVarP(&showhelp, "help", "h", false, "show help")
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// third-party optimizers
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flag.StringVar(&jpegtran, "jpegtran", "jpegtran", "jpegtran binary")
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flag.StringVar(&jpegoptim, "jpegoptim", "jpegoptim", "jpegoptim binary")
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flag.StringVar(&gifsicle, "gifsicle", "gifsicle", "gifsicle binary")
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flag.StringVar(&pngquant, "pngquant", "pngquant", "pngquant binary")
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flag.StringVar(&optipng, "optipng", "optipng", "optipng binary")
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flag.SortFlags = false
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// parse args excluding os.Args[0]
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flag.Parse(os.Args[1:])
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// detect optimizer paths
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gifsicle, _ = exec.LookPath(gifsicle)
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jpegoptim, _ = exec.LookPath(jpegoptim)
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jpegtran, _ = exec.LookPath(jpegtran)
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optipng, _ = exec.LookPath(optipng)
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pngquant, _ = exec.LookPath(pngquant)
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if showhelp {
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flag.Usage()
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os.Exit(1)
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}
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if showversion {
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fmt.Println(fmt.Sprintf("Version: %s", version))
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latest, _, _, err := ghru.Latest("axllent/goptimize", "goptimize")
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if err == nil && ghru.GreaterThan(latest, version) {
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fmt.Printf("Update available: %s\nRun `%s -u` to update.\n", latest, os.Args[0])
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}
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return
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}
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if update {
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rel, err := ghru.Update("axllent/goptimize", "goptimize", version)
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if err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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fmt.Printf("Updated %s to version %s\n", os.Args[0], rel)
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return
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}
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if len(flag.Args()) < 1 {
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flag.Usage()
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os.Exit(1)
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}
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if maxSizes != "" {
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// calculate max sizes from arg[0]
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r := regexp.MustCompile(`^(\d+)(x|X|\*|:)(\d+)$`)
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matches := r.FindStringSubmatch(maxSizes)
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if len(matches) != 4 {
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flag.Usage()
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os.Exit(1)
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}
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maxWidth, _ = strconv.Atoi(matches[1])
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maxHeight, _ = strconv.Atoi(matches[3])
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}
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// parse arguments
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args := flag.Args()
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if outputDir != "" {
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// ensure the output directory exists
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if _, err := os.Stat(outputDir); os.IsNotExist(err) {
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err := os.MkdirAll(outputDir, os.ModePerm)
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if err != nil {
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fmt.Printf("Cannot create output directory: %s\n", outputDir)
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os.Exit(1)
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}
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}
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}
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if multiThreaded {
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threads = runtime.NumCPU()
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}
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processChan := make(chan string)
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wg := &sync.WaitGroup{} // Signal to main goroutine that worker goroutines are working/done working
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wg.Add(threads)
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for i := 0; i < threads; i++ {
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go func() {
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for nextFile := range processChan {
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Goptimize(nextFile)
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}
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// Channel was closed, so we finished this goroutine.
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wg.Done() // Let main goroutine know we are done.
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}()
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}
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for _, img := range args {
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processChan <- img
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}
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// Close the channel. This tells the worker goroutines that they can be done.
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close(processChan)
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// Wait for all worker goroutines to finish processing the IPs
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wg.Wait()
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}
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// displayDelectedOptimizer prints whether the optimizer was found
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func displayDelectedOptimizer(name, bin string) error {
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exe, err := exec.LookPath(bin)
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if err != nil {
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return err
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}
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fmt.Printf(" - %s: %s\n", name, exe)
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return nil
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}
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