Kaden
76 lines
1.9 KiB
Go
76 lines
1.9 KiB
Go
package cli
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import (
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"context"
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"fmt"
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"net"
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"net/http"
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"os"
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"path/filepath"
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"time"
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"github.com/spf13/cobra"
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)
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func newServeCmd() *cobra.Command {
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var addr string
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cmd := &cobra.Command{
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Use: "serve [dir]",
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Short: "Preview a cloned folder in your browser",
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Long: "serve runs a local static file server over a cloned folder so you can click\n" +
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"through the mirror exactly as a visitor would. With no dir it serves the\n" +
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"current directory.",
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Args: cobra.MaximumNArgs(1),
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RunE: func(cmd *cobra.Command, args []string) error {
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dir := "."
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if len(args) == 1 {
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dir = args[0]
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}
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return runServe(cmd.Context(), dir, addr)
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},
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}
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cmd.Flags().StringVarP(&addr, "addr", "a", "127.0.0.1:8800", "address to listen on")
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return cmd
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}
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func runServe(ctx context.Context, dir, addr string) error {
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info, err := os.Stat(dir)
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if err != nil {
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return fmt.Errorf("cannot serve %q: %w", dir, err)
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}
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if !info.IsDir() {
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return fmt.Errorf("%q is not a directory", dir)
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}
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abs, _ := filepath.Abs(dir)
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ln, err := net.Listen("tcp", addr)
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if err != nil {
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return fmt.Errorf("cannot listen on %s: %w", addr, err)
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}
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srv := &http.Server{Handler: http.FileServer(http.Dir(abs))}
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fmt.Fprintln(os.Stderr, styleTitle.Render("kage serve")+" "+styleDim.Render(abs))
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fmt.Fprintln(os.Stderr, " open "+styleAccent.Render("http://"+ln.Addr().String()))
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fmt.Fprintln(os.Stderr, styleDim.Render(" press Ctrl-C to stop"))
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srvErr := make(chan error, 1)
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go func() { srvErr <- srv.Serve(ln) }()
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select {
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case err := <-srvErr:
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if err != nil && err != http.ErrServerClosed {
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return err
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}
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case <-ctx.Done():
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shutdownCtx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
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defer cancel()
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if err := srv.Shutdown(shutdownCtx); err != nil {
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_ = srv.Close()
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}
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if err := <-srvErr; err != nil && err != http.ErrServerClosed {
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return err
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}
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}
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return nil
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}
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