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migrate: support start desired version

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This commit is contained in:
Yicheng Qin
2015-01-22 13:40:45 -08:00
parent 43f1ccc88c
commit ec5a6e8beb
9 changed files with 1034 additions and 5 deletions
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10
pkg/flags/flag.go
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@@ -119,3 +119,13 @@ func URLsFromFlags(fs *flag.FlagSet, urlsFlagName string, addrFlagName string, t
return []url.URL(*fs.Lookup(urlsFlagName).Value.(*URLsValue)), nil
}
func IsSet(fs *flag.FlagSet, name string) bool {
set := false
fs.Visit(func(f *flag.Flag) {
if f.Name == name {
set = true
}
})
return set
}