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consistently use log.Check for logging errors that "should not happen", don't influence application flow

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sooner or later, someone will notice one of these messages, which will lead us
to a bug.
This commit is contained in:
Mechiel Lukkien
2023-02-16 13:22:00 +01:00
parent ef8e5fa1a8
commit 5c33640aea
30 changed files with 366 additions and 246 deletions
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35
store/export.go
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@ -114,7 +114,8 @@ func ExportMessages(log *mlog.Log, db *bstore.DB, accountDir string, archiver Ar
}
defer func() {
if tx != nil {
tx.Rollback()
err := tx.Rollback()
log.Check(err, "transaction rollback after export error")
}
}()
@ -207,7 +208,8 @@ func ExportMessages(log *mlog.Log, db *bstore.DB, accountDir string, archiver Ar
var mboxwriter *bufio.Writer
defer func() {
if mboxtmp != nil {
mboxtmp.Close()
err := mboxtmp.Close()
log.Check(err, "closing mbox temp file")
}
}()
@ -245,7 +247,8 @@ func ExportMessages(log *mlog.Log, db *bstore.DB, accountDir string, archiver Ar
return fmt.Errorf("adding dovecot-keywords: %v", err)
}
if _, err := w.Write(b.Bytes()); err != nil {
w.Close()
xerr := w.Close()
log.Check(xerr, "closing dovecot-keywords file after closing")
return fmt.Errorf("writing dovecot-keywords: %v", err)
}
maildirFlags = map[string]int{}
@ -272,16 +275,15 @@ func ExportMessages(log *mlog.Log, db *bstore.DB, accountDir string, archiver Ar
return fmt.Errorf("add mbox to archive: %v", err)
}
if _, err := io.Copy(w, mboxtmp); err != nil {
w.Close()
xerr := w.Close()
log.Check(xerr, "closing mbox message file after error")
return fmt.Errorf("copying temp mbox file to archive: %v", err)
}
if err := w.Close(); err != nil {
return fmt.Errorf("closing message file: %v", err)
}
if err := mboxtmp.Close(); err != nil {
log.Errorx("closing temporary mbox file", err)
// Continue, not fatal.
}
err = mboxtmp.Close()
log.Check(err, "closing temporary mbox file")
mboxwriter = nil
mboxtmp = nil
return nil
@ -293,13 +295,16 @@ func ExportMessages(log *mlog.Log, db *bstore.DB, accountDir string, archiver Ar
if m.Size == int64(len(m.MsgPrefix)) {
mr = io.NopCloser(bytes.NewReader(m.MsgPrefix))
} else {
mpf, err := os.Open(mp)
mf, err := os.Open(mp)
if err != nil {
errors += fmt.Sprintf("open message file for id %d, path %s: %v (message skipped)\n", m.ID, mp, err)
return nil
}
defer mpf.Close()
st, err := mpf.Stat()
defer func() {
err := mf.Close()
log.Check(err, "closing message file after export")
}()
st, err := mf.Stat()
if err != nil {
errors += fmt.Sprintf("stat message file for id %d, path %s: %v (message skipped)\n", m.ID, mp, err)
return nil
@ -308,7 +313,7 @@ func ExportMessages(log *mlog.Log, db *bstore.DB, accountDir string, archiver Ar
if size != m.Size {
errors += fmt.Sprintf("message size mismatch for message id %d, database has %d, size is %d+%d=%d, using calculated size\n", m.ID, m.Size, len(m.MsgPrefix), st.Size(), size)
}
mr = FileMsgReader(m.MsgPrefix, mpf)
mr = FileMsgReader(m.MsgPrefix, mf)
}
if maildir {
@ -386,7 +391,8 @@ func ExportMessages(log *mlog.Log, db *bstore.DB, accountDir string, archiver Ar
return fmt.Errorf("adding message to archive: %v", err)
}
if _, err := io.Copy(w, &dst); err != nil {
w.Close()
xerr := w.Close()
log.Check(xerr, "closing message")
return fmt.Errorf("copying message to archive: %v", err)
}
return w.Close()
@ -479,8 +485,9 @@ func ExportMessages(log *mlog.Log, db *bstore.DB, accountDir string, archiver Ar
return err
}
if _, err := w.Write([]byte(errors)); err != nil {
w.Close()
log.Errorx("writing errors.txt to archive", err)
xerr := w.Close()
log.Check(xerr, "closing errors.txt after error")
return err
}
if err := w.Close(); err != nil {