woodpecker/server/services/log/file/file.go

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package file
import (
"bufio"
"encoding/json"
"fmt"
"os"
"path/filepath"
"strings"
logger "github.com/rs/zerolog/log"
"go.woodpecker-ci.org/woodpecker/v2/pipeline"
"go.woodpecker-ci.org/woodpecker/v2/server/model"
"go.woodpecker-ci.org/woodpecker/v2/server/services/log"
)
const (
// Add base64 overhead and space for other JSON fields (just to be safe).
maxLineLength int = (pipeline.MaxLogLineLength/3)*4 + (64 * 1024) //nolint:mnd
)
type logStore struct {
base string
}
func NewLogStore(base string) (log.Service, error) {
if base == "" {
return nil, fmt.Errorf("file storage base path is required")
}
if _, err := os.Stat(base); err != nil && os.IsNotExist(err) {
err = os.MkdirAll(base, 0o600)
if err != nil {
return nil, err
}
}
return logStore{base: base}, nil
}
func (l logStore) filePath(id int64) string {
return filepath.Join(l.base, fmt.Sprintf("%d.json", id))
}
func (l logStore) LogFind(step *model.Step) ([]*model.LogEntry, error) {
filename := l.filePath(step.ID)
file, err := os.Open(filename)
if err != nil {
if os.IsNotExist(err) {
return nil, nil
}
return nil, err
}
buf := make([]byte, 0, bufio.MaxScanTokenSize)
s := bufio.NewScanner(file)
s.Buffer(buf, maxLineLength)
var entries []*model.LogEntry
for s.Scan() {
j := s.Text()
if len(strings.TrimSpace(j)) == 0 {
continue
}
entry := &model.LogEntry{}
err = json.Unmarshal([]byte(j), entry)
if err != nil {
return nil, err
}
entries = append(entries, entry)
}
return entries, nil
}
func (l logStore) LogAppend(step *model.Step, logEntries []*model.LogEntry) error {
path := l.filePath(step.ID)
file, err := os.OpenFile(path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o600)
if err != nil {
logger.Error().Err(err).Msgf("could not open log file %s", path)
return err
}
var bytes []byte
for _, logEntry := range logEntries {
if jsonLine, err := json.Marshal(logEntry); err == nil {
bytes = append(bytes, jsonLine...)
bytes = append(bytes, byte('\n'))
} else {
logger.Error().Err(err).Msg("could not convert log entry to JSON")
}
}
if _, err = file.Write(bytes); err != nil {
logger.Error().Err(err).Msg("could not write out log entries")
}
return file.Close()
}
func (l logStore) LogDelete(step *model.Step) error {
return os.Remove(l.filePath(step.ID))
}