61 lines
1.5 KiB
Go
61 lines
1.5 KiB
Go
// Package vfscommon provides utilities for VFS.
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package vfscommon
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import (
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"fmt"
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"github.com/rclone/rclone/fs"
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)
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// CacheMode controls the functionality of the cache
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type CacheMode byte
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// CacheMode options
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const (
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CacheModeOff CacheMode = iota // cache nothing - return errors for writes which can't be satisfied
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CacheModeMinimal // cache only the minimum, e.g. read/write opens
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CacheModeWrites // cache all files opened with write intent
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CacheModeFull // cache all files opened in any mode
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)
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var cacheModeToString = []string{
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CacheModeOff: "off",
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CacheModeMinimal: "minimal",
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CacheModeWrites: "writes",
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CacheModeFull: "full",
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}
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// String turns a CacheMode into a string
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func (l CacheMode) String() string {
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if l >= CacheMode(len(cacheModeToString)) {
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return fmt.Sprintf("CacheMode(%d)", l)
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}
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return cacheModeToString[l]
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}
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// Set a CacheMode
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func (l *CacheMode) Set(s string) error {
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for n, name := range cacheModeToString {
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if s != "" && name == s {
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*l = CacheMode(n)
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return nil
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}
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}
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return fmt.Errorf("unknown cache mode level %q", s)
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}
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// Type of the value
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func (l *CacheMode) Type() string {
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return "CacheMode"
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}
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// UnmarshalJSON makes sure the value can be parsed as a string or integer in JSON
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func (l *CacheMode) UnmarshalJSON(in []byte) error {
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return fs.UnmarshalJSONFlag(in, l, func(i int64) error {
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if i < 0 || i >= int64(len(cacheModeToString)) {
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return fmt.Errorf("unknown cache mode level %d", i)
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}
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*l = CacheMode(i)
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return nil
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})
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}
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