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package main
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import (
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"fmt"
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"os"
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"path"
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)
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func usage() {
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fmt.Printf("usage: %v path\n", os.Args[0])
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os.Exit(1)
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}
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func main() {
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if len(os.Args) != 2 {
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usage()
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}
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fmt.Println(path.Dir(os.Args[1]))
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}
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