goveal/internal/app/cmd/serve.go

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// Copyright © 2019 Peter Kurfer peter.kurfer@googlemail.com
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"errors"
"fmt"
"net/http"
"os/exec"
"runtime"
"github.com/baez90/go-reveal-slides/internal/app/server"
"github.com/spf13/cobra"
log "github.com/sirupsen/logrus"
)
var (
host string
port uint16
openBrowser bool
serveCmd = &cobra.Command{
Use: "serve",
Args: cobra.ExactArgs(1),
Short: "",
Long: ``,
RunE: func(cmd *cobra.Command, args []string) (err error) {
var srv *server.HTTPServer
srv, err = server.NewHTTPServer(server.Config{
Host: host,
Port: port,
MarkdownPath: args[0],
RevealParams: &params,
})
if err != nil {
log.Errorf("Error while setting up server: %v", err)
return
}
listenUrl := fmt.Sprintf("http://%s/", srv.ListenAddress())
log.Infof("Going to listen on %s", listenUrl)
if openBrowser {
log.Info("Opening browser...")
openBrowserInBackground(listenUrl)
}
if err = srv.Serve(); err != nil && !errors.Is(err, http.ErrServerClosed) {
log.Errorf("Error while running serve command: %v", err)
}
return nil
},
}
)
func init() {
rootCmd.AddCommand(serveCmd)
serveCmd.Flags().StringVar(&host, "host", "localhost", "host the CLI should listen on")
serveCmd.Flags().Uint16Var(&port, "port", 2233, "port the CLI should listen on")
serveCmd.Flags().BoolVar(&openBrowser, "open-browser", true, "if the browser should be opened at the URL")
}
func openBrowserInBackground(url string) {
var err error
switch runtime.GOOS {
case "linux":
err = exec.Command("xdg-open", url).Start()
case "windows":
err = exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
case "darwin":
err = exec.Command("open", url).Start()
default:
err = fmt.Errorf("unsupported platform")
}
if err != nil {
log.Warn(err)
}
}