90 lines
2.4 KiB
Go
90 lines
2.4 KiB
Go
package copy
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import "os"
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// Options specifies optional actions on copying.
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type Options struct {
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// OnSymlink can specify what to do on symlink
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OnSymlink func(src string) SymlinkAction
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// OnDirExists can specify what to do when there is a directory already existing in destination.
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OnDirExists func(src, dest string) DirExistsAction
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// Skip can specify which files should be skipped
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Skip func(src string) (bool, error)
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// AddPermission to every entities,
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// NO MORE THAN 0777
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AddPermission os.FileMode
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// Sync file after copy.
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// Useful in case when file must be on the disk
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// (in case crash happens, for example),
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// at the expense of some performance penalty
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Sync bool
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// Preserve the atime and the mtime of the entries.
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// On linux we can preserve only up to 1 millisecond accuracy.
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PreserveTimes bool
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// Preserve the uid and the gid of all entries.
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PreserveOwner bool
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// The byte size of the buffer to use for copying files.
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// If zero, the internal default buffer of 32KB is used.
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// See https://golang.org/pkg/io/#CopyBuffer for more information.
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CopyBufferSize uint
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intent struct {
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src string
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dest string
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}
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}
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// SymlinkAction represents what to do on symlink.
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type SymlinkAction int
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const (
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// Deep creates hard-copy of contents.
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Deep SymlinkAction = iota
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// Shallow creates new symlink to the dest of symlink.
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Shallow
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// Skip does nothing with symlink.
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Skip
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)
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// DirExistsAction represents what to do on dest dir.
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type DirExistsAction int
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const (
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// Merge preserves or overwrites existing files under the dir (default behavior).
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Merge DirExistsAction = iota
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// Replace deletes all contents under the dir and copy src files.
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Replace
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// Untouchable does nothing for the dir, and leaves it as it is.
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Untouchable
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)
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// getDefaultOptions provides default options,
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// which would be modified by usage-side.
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func getDefaultOptions(src, dest string) Options {
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return Options{
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OnSymlink: func(string) SymlinkAction {
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return Shallow // Do shallow copy
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},
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OnDirExists: nil, // Default behavior is "Merge".
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Skip: func(string) (bool, error) {
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return false, nil // Don't skip
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},
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AddPermission: 0, // Add nothing
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Sync: false, // Do not sync
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PreserveTimes: false, // Do not preserve the modification time
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CopyBufferSize: 0, // Do not specify, use default bufsize (32*1024)
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intent: struct {
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src string
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dest string
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}{src, dest},
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}
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}
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