/
archive.go
167 lines (153 loc) · 3.77 KB
/
archive.go
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package io
import (
"errors"
"fmt"
"net/url"
"os"
"path/filepath"
"slices"
"strings"
"time"
)
const (
MaxArchiveSize = 50
LogEntryTimeFormat = "2006-01-02-15-04-05"
)
type ArchiveEntry struct {
Args string
Time time.Time
Path string
}
func (e ArchiveEntry) Title() string {
return e.Args
}
func (e ArchiveEntry) Description() string {
return e.Time.Format("03:04PM 01/02/2006")
}
func (e ArchiveEntry) FilterValue() string {
return e.Title() + " " + e.Description()
}
func (e ArchiveEntry) Read() (string, error) {
if e.Path == "" {
return "", errors.New("archive entry path is empty")
}
data, err := os.ReadFile(filepath.Clean(e.Path))
if err != nil {
return "", err
}
return string(data), nil
}
func NewArchiveLogFile(archiveDir string) *os.File {
if dir, err := os.Stat(archiveDir); os.IsNotExist(err) {
err := os.MkdirAll(archiveDir, 0750)
if err != nil {
panic(fmt.Errorf("failed to create archive directory: %w", err))
}
} else if !dir.IsDir() {
panic(fmt.Errorf("archive directory is not a directory"))
}
writer, err := os.Create(filepath.Clean(filepath.Join(archiveDir, NewArchiveFileName())))
if err != nil {
panic(fmt.Errorf("failed to create archive log file: %w", err))
}
return writer
}
func RotateArchive(logger *StandardLogger) {
if logger.archiveDir == "" {
return
}
files, err := os.ReadDir(logger.archiveDir)
if err != nil {
logger.Fatalf("failed to read archive directory: %s", err)
}
if len(files) < MaxArchiveSize {
return
}
slices.SortFunc(files, func(i, j os.DirEntry) int {
iInfo, err := i.Info()
if err != nil {
logger.Fatalf("failed to get info for archive file: %s", err)
}
jInfo, err := j.Info()
if err != nil {
logger.Fatalf("failed to get info for archive file: %s", err)
}
if iInfo.ModTime().Before(jInfo.ModTime()) {
return -1
} else if iInfo.ModTime().After(jInfo.ModTime()) {
return 1
}
return 0
})
for i := 0; i < len(files)-MaxArchiveSize; i++ {
oldest := files[i]
err := os.Remove(filepath.Clean(filepath.Join(logger.archiveDir, oldest.Name())))
if err != nil {
logger.Fatalf("failed to remove oldest archive file: %s", err)
}
}
}
func ListArchiveEntries(archiveDir string) ([]ArchiveEntry, error) {
_, err := os.Stat(archiveDir)
if err != nil {
return nil, err
}
files, err := os.ReadDir(archiveDir)
if err != nil {
return nil, err
}
var entries []ArchiveEntry
for _, file := range files {
if file.IsDir() {
continue
} else if filepath.Ext(file.Name()) != ".log" {
continue
}
if info, err := file.Info(); err != nil {
return nil, err
} else if info.Size() == 0 {
continue
}
args, ts, err := ParseArchiveFileMetadata(file.Name())
if err != nil {
continue
}
entries = append(entries, ArchiveEntry{
Args: args,
Time: ts,
Path: filepath.Clean(filepath.Join(archiveDir, file.Name())),
})
}
slices.SortFunc(entries, func(i, j ArchiveEntry) int {
if i.Time.Before(j.Time) {
return -1
} else if i.Time.After(j.Time) {
return 1
}
return 0
})
return entries, nil
}
func DeleteArchiveEntry(entryPath string) error {
return os.Remove(filepath.Clean(entryPath))
}
func NewArchiveFileName() string {
args := os.Args
argsStr := url.QueryEscape(strings.Join(args[1:], " "))
return fmt.Sprintf("%s__%s.log", argsStr, time.Now().Local().Format(LogEntryTimeFormat))
}
func ParseArchiveFileMetadata(name string) (args string, ts time.Time, err error) {
parts := strings.Split(strings.TrimSuffix(filepath.Base(name), ".log"), "__")
if len(parts) != 2 {
return "", time.Time{}, errors.New("invalid archive file name")
}
args, err = url.QueryUnescape(parts[0])
if err != nil {
return "", time.Time{}, err
}
ts, err = time.Parse(LogEntryTimeFormat, parts[1])
if err != nil {
return "", time.Time{}, err
}
return args, ts, nil
}