Move ca commands to its own package.

commands/app.go

@@ -0,0 +1,79 @@
+package commands
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"unicode"
+
+	"github.com/pkg/errors"
+	"github.com/smallstep/certificates/authority"
+	"github.com/smallstep/certificates/ca"
+	"github.com/smallstep/cli/errs"
+	"github.com/urfave/cli"
+)
+
+// AppCommand is the action used as the top action.
+var AppCommand = cli.Command{
+	Name:   "start",
+	Action: appAction,
+	Flags: []cli.Flag{
+		cli.StringFlag{
+			Name: "password-file",
+			Usage: `path to the <file> containing the password to decrypt the
+intermediate private key.`,
+		},
+	},
+}
+
+// AppAction is the action used when the top command runs.
+func appAction(ctx *cli.Context) error {
+	passFile := ctx.String("password-file")
+
+	// If zero cmd line args show help, if >1 cmd line args show error.
+	if ctx.NArg() == 0 {
+		return cli.ShowAppHelp(ctx)
+	}
+	if err := errs.NumberOfArguments(ctx, 1); err != nil {
+		return err
+	}
+
+	configFile := ctx.Args().Get(0)
+	config, err := authority.LoadConfiguration(configFile)
+	if err != nil {
+		fatal(err)
+	}
+
+	var password []byte
+	if passFile != "" {
+		if password, err = ioutil.ReadFile(passFile); err != nil {
+			fatal(errors.Wrapf(err, "error reading %s", passFile))
+		}
+		password = bytes.TrimRightFunc(password, unicode.IsSpace)
+	}
+
+	srv, err := ca.New(config, ca.WithConfigFile(configFile), ca.WithPassword(password))
+	if err != nil {
+		fatal(err)
+	}
+
+	go ca.StopReloaderHandler(srv)
+	if err = srv.Run(); err != nil && err != http.ErrServerClosed {
+		fatal(err)
+	}
+	return nil
+}
+
+// fatal writes the passed error on the standard error and exits with the exit
+// code 1. If the environment variable STEPDEBUG is set to 1 it shows the
+// stack trace of the error.
+func fatal(err error) {
+	if os.Getenv("STEPDEBUG") == "1" {
+		fmt.Fprintf(os.Stderr, "%+v\n", err)
+	} else {
+		fmt.Fprintln(os.Stderr, err)
+	}
+	os.Exit(2)
+}