/
node.go
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/
node.go
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// Copyright 2020 Coinbase, Inc.
// Copyright 2021 Rosetta Dogecoin Developers
//
// 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 dogecoin
import (
"bufio"
"context"
"fmt"
"io"
"os"
"os/exec"
"strings"
"github.com/rosetta-dogecoin/rosetta-dogecoin/utils"
"golang.org/x/sync/errgroup"
)
const (
bitcoindLogger = "dogecoind"
bitcoindStdErrLogger = "dogecoind stderr"
)
func logPipe(ctx context.Context, pipe io.ReadCloser, identifier string) error {
logger := utils.ExtractLogger(ctx, identifier)
reader := bufio.NewReader(pipe)
for {
str, err := reader.ReadString('\n')
if err != nil {
logger.Warnw("closing logger", "error", err)
return err
}
message := strings.ReplaceAll(str, "\n", "")
messages := strings.SplitAfterN(message, " ", 2)
// Trim the timestamp from the log if it exists
if len(messages) > 1 {
message = messages[1]
}
// Print debug log if from bitcoindLogger
if identifier == bitcoindLogger {
logger.Debugw(message)
continue
}
logger.Warnw(message)
}
}
// StartDogecoind starts a dogecoin daemon in another goroutine
// and logs the results to the console.
func StartDogecoind(ctx context.Context, configPath string, g *errgroup.Group) error {
logger := utils.ExtractLogger(ctx, "dogecoind")
cmd := exec.Command(
"/app/dogecoind",
fmt.Sprintf("--conf=%s", configPath),
) // #nosec G204
stdout, err := cmd.StdoutPipe()
if err != nil {
return err
}
stderr, err := cmd.StderrPipe()
if err != nil {
return err
}
g.Go(func() error {
return logPipe(ctx, stdout, bitcoindLogger)
})
g.Go(func() error {
return logPipe(ctx, stderr, bitcoindStdErrLogger)
})
if err := cmd.Start(); err != nil {
return fmt.Errorf("%w: unable to start dogecoind", err)
}
g.Go(func() error {
<-ctx.Done()
logger.Warnw("sending interrupt to dogecoind")
return cmd.Process.Signal(os.Interrupt)
})
return cmd.Wait()
}