85 lines
2.0 KiB
Go
85 lines
2.0 KiB
Go
package main
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import (
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"bufio"
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"flag"
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"fmt"
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"io"
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"os"
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"apigo.cc/go/log"
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)
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func main() {
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jsonMode := flag.Bool("json", false, "output in JSON format")
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helpMode := flag.Bool("h", false, "show help")
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flag.BoolVar(helpMode, "help", false, "show help")
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flag.Usage = func() {
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fmt.Fprintf(os.Stderr, "Usage: logv [options] [file1 file2 ...]\n")
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fmt.Fprintf(os.Stderr, "Options:\n")
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flag.PrintDefaults()
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fmt.Fprintf(os.Stderr, "\nExamples:\n")
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fmt.Fprintf(os.Stderr, " 1. 彩色可视化实时日志:\n")
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fmt.Fprintf(os.Stderr, " tail -f app.log | logv\n")
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fmt.Fprintf(os.Stderr, " 2. 格式化查看历史日志文件:\n")
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fmt.Fprintf(os.Stderr, " logv error.log\n")
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fmt.Fprintf(os.Stderr, " 3. 还原为标准 JSON 格式 (供 Filebeat / Logstash 收集):\n")
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fmt.Fprintf(os.Stderr, " tail -f app.log | logv -json\n")
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fmt.Fprintf(os.Stderr, " 4. 批量转换日志文件为 JSON:\n")
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fmt.Fprintf(os.Stderr, " logv -json app.log.2026* > all_logs.json\n")
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}
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flag.Parse()
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if *helpMode {
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flag.Usage()
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return
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}
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// Try to load meta file from current directory
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_ = log.LoadMeta(".log.meta.json")
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args := flag.Args()
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if len(args) == 0 {
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// Check if stdin is a terminal
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stat, _ := os.Stdin.Stat()
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if (stat.Mode() & os.ModeCharDevice) != 0 {
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// Stdin is a terminal and no files provided, show usage
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flag.Usage()
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return
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}
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process(os.Stdin, *jsonMode)
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} else {
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for _, arg := range args {
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f, err := os.Open(arg)
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if err != nil {
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fmt.Fprintf(os.Stderr, "logv: %v\n", err)
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continue
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}
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process(f, *jsonMode)
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f.Close()
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}
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}
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}
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func process(r io.Reader, jsonMode bool) {
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scanner := bufio.NewScanner(r)
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for scanner.Scan() {
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line := scanner.Text()
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if len(line) == 0 {
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continue
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}
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if jsonMode {
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fmt.Println(log.ToJSON(line))
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} else {
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fmt.Println(log.Viewable(line))
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}
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}
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if err := scanner.Err(); err != nil {
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fmt.Fprintf(os.Stderr, "logv: error reading input: %v\n", err)
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}
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}
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