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app/vmalert: print brief usage info for vmalert -help

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This commit is contained in:
Aliaksandr Valialkin 2020-06-05 10:42:56 +03:00
parent ff1a725a56
commit 0d92abfbf6
1 changed files with 13 additions and 0 deletions
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13
app/vmalert/main.go
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@ -62,6 +62,7 @@ absolute path to all .yaml files in root.`)
func main() { func main() {
// Write flags and help message to stdout, since it is easier to grep or pipe. // Write flags and help message to stdout, since it is easier to grep or pipe.
flag.CommandLine.SetOutput(os.Stdout) flag.CommandLine.SetOutput(os.Stdout)
flag.Usage = usage
envflag.Parse() envflag.Parse()
buildinfo.Init() buildinfo.Init()
logger.Init() logger.Init()
@ -172,3 +173,15 @@ func checkFlags() {
logger.Fatalf("datasource.url is empty") logger.Fatalf("datasource.url is empty")
} }
} }
func usage() {
const s = `
vmalert processes alerts and recording rules.
See the docs at https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/app/vmalert/README.md .
`
f := flag.CommandLine.Output()
fmt.Fprintf(f, "%s\n", s)
flag.PrintDefaults()
}