f19619ef9f
This commit adds a new environment package that manages all calls to the underlying operating system.
43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
package component
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import (
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"io"
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"github.com/tkw1536/goprogram/stream"
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)
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// Backupable represents a component with a Backup method
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type Backupable interface {
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Component
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// BackupName returns a new name to be used as an argument for path.
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BackupName() string
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// Backup backs up this component into the destination path path
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Backup(context BackupContext) error
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}
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// BackupContext is the context for backups
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type BackupContext interface {
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// IO returns the input output stream belonging to this backup file
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IO() stream.IOStream
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// Name creates a new directory inside the destination.
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// Passing the empty path creates the destination as a directory.
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//
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// It then allows op to fill the file.
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AddDirectory(path string, op func() error) error
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// CopyFile copies a file from src to dst.
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CopyFile(dst, src string) error
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// AddFile creates a new file at the provided path inside the destination.
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// Passing the empty path creates the destination as a file.
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//
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// It then allows op to write to the file.
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//
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// The op function must not retain file.
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// The underlying file does not need to be closed.
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// AddFile will not return before op has returned.
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AddFile(path string, op func(file io.Writer) error) error
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}
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