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package cli_helpers
import (
"os"
"runtime/pprof"
"github.com/urfave/cli"
)
func SetupCPUProfile(app *cli.App) {
app.Flags = append(app.Flags, cli.StringFlag{
Name: "cpuprofile",
Usage: "write cpu profile to file",
EnvVar: "CPU_PROFILE",
})
appBefore := app.Before
appAfter := app.After
app.Before = func(c *cli.Context) error {
if cpuProfile := c.String("cpuprofile"); cpuProfile != "" {
f, err := os.Create(cpuProfile)
if err != nil {
return err
}
_ = pprof.StartCPUProfile(f)
}
if appBefore != nil {
return appBefore(c)
}
return nil
}
app.After = func(c *cli.Context) error {
pprof.StopCPUProfile()
if appAfter != nil {
return appAfter(c)
}
return nil
}
}
|
