49 lines
872 B
Go
49 lines
872 B
Go
package main
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import (
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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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)
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func addNote(fn string, note string) error {
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f, err := os.OpenFile(fn, os.O_RDWR|os.O_APPEND|os.O_CREATE, 0666)
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if err != nil {
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return err
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}
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_, err = fmt.Fprint(f, time.Now().Format(time.RFC1123), "\n\t", note, "\n")
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// To be extra careful with errors from Close():
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if cErr := f.Close(); err == nil {
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err = cErr
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}
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return err
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}
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func showNotes(w io.Writer, fn string) error {
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f, err := os.Open(fn)
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if err != nil {
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if os.IsNotExist(err) {
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return nil // don't report "no such file"
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}
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return err
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}
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_, err = io.Copy(w, f)
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f.Close()
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return err
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}
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func main() {
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const fn = "NOTES.TXT"
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var err error
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if len(os.Args) > 1 {
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err = addNote(fn, strings.Join(os.Args[1:], " "))
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} else {
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err = showNotes(os.Stdout, fn)
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}
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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}
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