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https://github.com/kopia/kopia.git
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6160ee5668
* refactor(repository): moved format blob management to separate package This is completely mechanical, no behavior changes, only: - moved types and functions to a new package - adjusted visibility where needed - added missing godoc - renamed some identifiers to align with current usage - mechanically converted some top-level functions into member functions - fixed some mis-named variables * refactor(repository): moved content.FormatingOptions to format.ContentFormat
58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
// Package cachedir contains utilities for manipulating cache directories.
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package cachedir
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import (
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"os"
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"path/filepath"
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"github.com/pkg/errors"
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)
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// CacheDirMarkerFile is the name of the marker file indicating a directory contains Kopia caches.
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// See https://bford.info/cachedir/
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const CacheDirMarkerFile = "CACHEDIR.TAG"
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// CacheDirMarkerHeader is the header signature for cache dir marker files.
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const CacheDirMarkerHeader = "Signature: 8a477f597d28d172789f06886806bc55"
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const cacheDirMarkerContents = CacheDirMarkerHeader + `
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#
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# This file is a cache directory tag created by Kopia - Fast And Secure Open-Source Backup.
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#
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# For information about Kopia, see:
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# https://kopia.io
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#
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# For information about cache directory tags, see:
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# http://www.brynosaurus.com/cachedir/
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`
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// WriteCacheMarker writes the CACHEDIR.TAG marker file in a given directory.
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func WriteCacheMarker(cacheDir string) error {
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if cacheDir == "" {
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return nil
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}
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markerFile := filepath.Join(cacheDir, CacheDirMarkerFile)
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st, err := os.Stat(markerFile)
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if err == nil && st.Size() >= int64(len(cacheDirMarkerContents)) {
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// ok
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return nil
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}
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if err != nil && !os.IsNotExist(err) {
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return errors.Wrap(err, "unexpected cache marker error")
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}
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f, err := os.Create(markerFile) //nolint:gosec
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if err != nil {
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return errors.Wrap(err, "error creating cache marker")
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}
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if _, err := f.WriteString(cacheDirMarkerContents); err != nil {
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return errors.Wrap(err, "unable to write cachedir marker contents")
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}
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return errors.Wrap(f.Close(), "error closing cache marker file")
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}
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