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feat: parsing args and help info #15

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merged 1 commit into from
Sep 6, 2024
Merged

feat: parsing args and help info #15

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23 changes: 20 additions & 3 deletions internal/config/live-pprof-config.go
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Original file line number Diff line number Diff line change
Expand Up @@ -25,13 +25,17 @@ func ParseLPFlags() *LivePprofConfig {
flag.StringVar(&config.Host, "host", "0.0.0.0", "host to listen on")
flag.BoolVarP(&help, "help", "h", false, "help")

flag.BoolVarP(&config.OpenBrowser, "open-browser", "o", true, "open browser on startup")
flag.BoolVarP(&config.OpenBrowser, "no-browser", "n", false, "don't open browser")

flag.Parse()

args := flag.Args()
if len(args) > 0 {
if len(args) == 1 {
config.PprofURL = args[0]
} else if len(args) > 1 {
_, _ = fmt.Fprintf(os.Stderr, "Expected 0 or 1 arg, but %d were given: %v\n", len(args), args)
config.printHelp()
os.Exit(0)
}

if help {
Expand All @@ -47,10 +51,23 @@ func (config *LivePprofConfig) printHelp() {
fmt.Println()
fmt.Println("Usage Example:")
fmt.Println(" live-pprof")
fmt.Println(" open the browser and wait for instructions")
fmt.Println()
fmt.Println(" live-pprof 8080")
fmt.Println(" open the browser and start to monitor http://localhost:8080/debug/pprof")
fmt.Println(" equivalent to `live-pprof http://localhost:8080/debug/pprof`")
fmt.Println(" live-pprof localhost:8080")
fmt.Println(" open the browser and start to monitor http://localhost:8080")
fmt.Println(" live-pprof http://localhost:8080")
fmt.Println(" live-pprof http://localhost:8080/debug/pprof")
fmt.Println(" open the browser and start to monitor http://localhost:8080")
fmt.Println(" live-pprof https://example.com/perf")
fmt.Println(" open the browser and start to monitor https://example.com/perf")
fmt.Println()
fmt.Println(" live-pprof -n")
fmt.Println(" don't open the browser")
fmt.Println(" live-pprof --host 192.168.0.200 -port 1800")
fmt.Println(" listen on 192.168.0.200:1800")
fmt.Println()
fmt.Println("Help")
flag.PrintDefaults()
}