/gochips

Small useful pieces of golang code

Primary LanguageGoMIT LicenseMIT

gochips

Small useful pieces of golang code

import (
  gc "github.com/untillpro/gochips"
)

Chips for Tests

func Test_Get(t *testing.T) {
  err := MyFunc()
  gc.FatalIfError(t, err, "Error in MyFunc()")
}

Chips for Logging

  gc.Error(args ...interface{})
  gc.Info(args ...interface{})
  
  // Adds "..." suffux to  argument
  gc.Doing("Getting things done")

  // Does nothing until you set gc.IsVerbose = true
  gc.Verbose(args ...interface{})

}

Prefixes:

  • Verbose() output is prefixed with gc.VerbosePrefix = "--- "
  • Error() output is prefixed with gc.ErrorPrefix = "*** "

Change default behavior:

  • var Output func(funcName, s string)
    • This function is called by default implementation of Error, Info etc
  • It is possible to redefine all implementations, ref:
func init() {
	Doing = implDoing
	Info = implInfo
	Verbose = implVerbose
	Error = implError
	Output = implOutput
	VerboseWriters = implVerboseWriters
}

Chips for Exeс

Piped execution a-la shell

echo README.md | grep README.md | sed s/READ/forgive/:

	err := new(PipedExec).
		Command("echo", "README.md").WorkingDir("/").
		Command("grep", "README.md").
		Command("echo", "good").
		Run(os.Stdout, os.Stdout)

Avoid stdout until gc.IsVerbose is set to true:

	err := new(PipedExec).
		Command("echo", "README.md").WorkingDir("/").
		Command("grep", "README.md").
		Command("echo", "good").
		Run(gc.VerboseWriters())

Ref. also PipedExec_test.go