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cli: --check-flag #351

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Dec 30, 2016
Merged

cli: --check-flag #351

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5 changes: 5 additions & 0 deletions go/cmd/gh-ost/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -115,8 +115,13 @@ func main() {
stack := flag.Bool("stack", false, "add stack trace upon error")
help := flag.Bool("help", false, "Display usage")
version := flag.Bool("version", false, "Print version & exit")
checkFlag := flag.Bool("check-flag", false, "Check if another flag exists/supported. This allows for cross-version scripting. Exits with 0 when all additional provided flags exist, nonzero otherwise. You must provide (dummy) values for flags that require a value. Example: gh-ost --check-flag --cut-over-lock-timeout-seconds --nice-ratio 0")

flag.Parse()

if *checkFlag {
return
}
if *help {
fmt.Fprintf(os.Stderr, "Usage of gh-ost:\n")
flag.PrintDefaults()
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