asteris-llc/converge

// Copyright © 2016 Asteris, LLC
//
// 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 (
    "os"

    log "github.com/Sirupsen/logrus"
    "github.com/pkg/errors"
    "github.com/spf13/cobra"
    "github.com/spf13/viper"
    "golang.org/x/net/context"
    "google.golang.org/grpc/grpclog"
)

// serverCmd represents the server command
var serverCmd = &cobra.Command{
    Use:     "server",
    Short:   "serve content over HTTP(S)",
    Aliases: []string{"serve"},
    PreRunE: func(cmd *cobra.Command, args []string) error {
        // check HTTPS
        if err := validateSSL(); err != nil {
            return err
        }

        // check module serving
        stat, err := os.Stat(viper.GetString("root"))
        if err != nil {
            return err
        }
        if !stat.IsDir() {
            return errors.New("root should be a directory")
        }

        return nil
    },
    Run: func(cmd *cobra.Command, args []string) {
        ctx, cancel := context.WithCancel(context.Background())
        defer cancel()
        GracefulExit(cancel)

        setLocal(true)  // so we generate a token
        maybeSetToken() // set the token, if it's not set
        setLocal(false) // unset local so we get the right flag addresses

        // start RPC server
        if err := startRPC(ctx); err != nil {
            log.WithError(err).Fatal("serving failed")
        }
    },
}

func init() {
    RootCmd.AddCommand(serverCmd)

    // common
    registerSSLFlags(serverCmd.Flags())
    registerRPCFlags(serverCmd.Flags())

    // API
    serverCmd.Flags().String("root", ".", "location of modules to serve")
    serverCmd.Flags().Bool("self-serve", false, "serve own binary for bootstrapping")

    // set RPC logging to use logrus
    grpclog.SetLogger(log.WithField("component", "grpc"))
}