54 lines
1.0 KiB
Go
54 lines
1.0 KiB
Go
package main
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import (
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"encoding/json"
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"errors"
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"os"
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"path/filepath"
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)
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func atomicWriteJSON(path string, value any, mode os.FileMode) error {
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if path == "" {
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return nil
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}
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dir := filepath.Dir(path)
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if err := os.MkdirAll(dir, 0o700); err != nil {
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return err
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}
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data, err := json.MarshalIndent(value, "", " ")
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if err != nil {
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return err
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}
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temp, err := os.CreateTemp(dir, ".diple-*")
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if err != nil {
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return err
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}
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name := temp.Name()
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defer os.Remove(name)
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if err := temp.Chmod(mode); err != nil {
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_ = temp.Close()
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return err
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}
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if _, err := temp.Write(data); err != nil {
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_ = temp.Close()
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return err
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}
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if err := temp.Sync(); err != nil {
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_ = temp.Close()
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return err
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}
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if err := temp.Close(); err != nil {
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return err
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}
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if err := os.Rename(name, path); err != nil {
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return err
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}
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if directory, err := os.Open(dir); err == nil {
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defer directory.Close()
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if syncErr := directory.Sync(); syncErr != nil && !errors.Is(syncErr, os.ErrInvalid) {
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return syncErr
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}
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}
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return nil
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}
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