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union: backward compatible to old config

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Max Sum 2020-01-28 00:16:59 +08:00 committed by Nick Craig-Wood
parent f0c17a72db
commit 6898a0cccd
1 changed files with 12 additions and 4 deletions
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16
backend/union/union.go
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@ -29,21 +29,21 @@ func init() {
NewFs: NewFs,
Options: []fs.Option{{
Name: "upstreams",
Help: "List of space separated upstreams.\nCan be 'upstreama:test/dir upstreamb:', '\"remotea:test/space:ro dir\" remoteb:', etc.\n",
Help: "List of space separated upstreams.\nCan be 'upstreama:test/dir upstreamb:', '\"upstreama:test/space:ro dir\" upstreamb:', etc.\n",
Required: true,
}, {
Name: "action_policy",
Help: "Policy to choose upstream on ACTION class.",
Help: "Policy to choose upstream on ACTION category.",
Required: true,
Default: "epall",
}, {
Name: "create_policy",
Help: "Policy to choose upstream on CREATE class.",
Help: "Policy to choose upstream on CREATE category.",
Required: true,
Default: "epmfs",
}, {
Name: "search_policy",
Help: "Policy to choose upstream on SEARCH class.",
Help: "Policy to choose upstream on SEARCH category.",
Required: true,
Default: "ff",
}, {
@ -59,6 +59,7 @@ func init() {
// Options defines the configuration for this backend
type Options struct {
Upstreams fs.SpaceSepList `config:"upstreams"`
Remotes fs.SpaceSepList `config:"remotes"` // Depreated
ActionPolicy string `config:"action_policy"`
CreatePolicy string `config:"create_policy"`
SearchPolicy string `config:"search_policy"`
@ -644,6 +645,13 @@ func NewFs(name, root string, m configmap.Mapper) (fs.Fs, error) {
if err != nil {
return nil, err
}
// Backward compatible to old config
if len(opt.Upstreams) == 0 && len(opt.Remotes) > 0 {
for i := 0; i < len(opt.Remotes)-1; i++ {
opt.Remotes[i] = opt.Remotes[i] + ":ro"
}
opt.Upstreams = opt.Remotes
}
if len(opt.Upstreams) == 0 {
return nil, errors.New("union can't point to an empty upstream - check the value of the upstreams setting")
}