mirror of
https://github.com/go-gitea/gitea.git
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114 lines
2.8 KiB
Go
114 lines
2.8 KiB
Go
// Copyright 2022 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package bots
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import (
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"bufio"
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"context"
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"fmt"
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"io"
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"os"
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"strings"
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"time"
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"code.gitea.io/gitea/models/dbfs"
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runnerv1 "gitea.com/gitea/proto-go/runner/v1"
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"google.golang.org/protobuf/types/known/timestamppb"
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)
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const (
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MaxLineSize = 64 * 1024
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DBFSPrefix = "bots_tasks/"
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timeFormat = time.RFC3339Nano
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defaultBufSize = 64 * 1024
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)
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func WriteLogs(ctx context.Context, filename string, offset int64, rows []*runnerv1.LogRow) ([]int, error) {
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name := DBFSPrefix + filename
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f, err := dbfs.OpenFile(ctx, name, os.O_WRONLY|os.O_CREATE)
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if err != nil {
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return nil, fmt.Errorf("dbfs OpenFile %q: %w", name, err)
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}
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defer f.Close()
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if _, err := f.Seek(offset, io.SeekStart); err != nil {
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return nil, fmt.Errorf("dbfs Seek %q: %w", name, err)
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}
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writer := bufio.NewWriterSize(f, defaultBufSize)
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ns := make([]int, 0, len(rows))
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for _, row := range rows {
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n, err := writer.WriteString(FormatLog(row.Time.AsTime(), row.Content) + "\n")
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if err != nil {
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return nil, err
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}
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ns = append(ns, n)
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}
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if err := writer.Flush(); err != nil {
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return nil, err
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}
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return ns, nil
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}
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func ReadLogs(ctx context.Context, filename string, offset int64, limit int64) ([]*runnerv1.LogRow, error) {
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name := DBFSPrefix + filename
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f, err := dbfs.Open(ctx, name)
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if err != nil {
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return nil, fmt.Errorf("dbfs Open %q: %w", name, err)
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}
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defer f.Close()
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if _, err := f.Seek(offset, io.SeekStart); err != nil {
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return nil, fmt.Errorf("dbfs Seek %q: %w", name, err)
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}
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scanner := bufio.NewScanner(f)
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maxLineSize := len(timeFormat) + MaxLineSize + 1
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scanner.Buffer(make([]byte, maxLineSize), maxLineSize)
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var rows []*runnerv1.LogRow
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for scanner.Scan() && (int64(len(rows)) < limit || limit < 0) {
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t, c, err := ParseLog(scanner.Text())
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if err != nil {
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return nil, fmt.Errorf("parse log %q: %w", scanner.Text(), err)
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}
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rows = append(rows, &runnerv1.LogRow{
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Time: timestamppb.New(t),
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Content: c,
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})
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}
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if err := scanner.Err(); err != nil {
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return nil, fmt.Errorf("scan: %w", err)
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}
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return rows, nil
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}
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func FormatLog(timestamp time.Time, content string) string {
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// Content shouldn't contain new line, it will break log indexes, other control chars are safe.
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content = strings.ReplaceAll(content, "\n", `\n`)
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if len(content) > MaxLineSize {
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content = content[:MaxLineSize]
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}
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return fmt.Sprintf("%s %s", timestamp.UTC().Format(timeFormat), content)
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}
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func ParseLog(in string) (timestamp time.Time, content string, err error) {
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index := strings.IndexRune(in, ' ')
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if index < 0 {
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err = fmt.Errorf("invalid log: %q", in)
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return
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}
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timestamp, err = time.Parse(timeFormat, in[:index])
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if err != nil {
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return
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}
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content = in[index+1:]
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return
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}
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