Add deprecation notice to godog CLI (#489)

* Add deprecation notice to godog CLI

* Update CHANGELOG

CHANGELOG.md

@@ -9,12 +9,15 @@ This document is formatted according to the principles of [Keep A CHANGELOG](htt
 ## Unreleased
 
 ### Changed
-- README example is updated with `context.Context` and `go test` usage. ([477](https://github.com/cucumber/godog/pull/477) - [vearutop](https://github.com/vearutop)) 
+- README example is updated with `context.Context` and `go test` usage. ([477](https://github.com/cucumber/godog/pull/477) - [vearutop](https://github.com/vearutop))
 
 ### Fixed
 - Fixed a bug which would ignore the context returned from a substep.([488](https://github.com/cucumber/godog/pull/488) - [wichert](https://github.com/wichert))
 - Fixed a bug which would cause a panic when using the pretty formatter with a feature that contained a rule. ([480](https://github.com/cucumber/godog/pull/480) - [dumpsterfireproject](https://github.com/dumpsterfireproject))
 
+### Deprecated
+- `godog` CLI tool prints deprecation warning. ([489](https://github.com/cucumber/godog/pull/489) - [vearutop](https://github.com/vearutop))
+
 ## [v0.12.5]
 ### Changed
 - Changed underlying cobra command setup to return errors instead of calling `os.Exit` directly to enable simpler testing. ([454](https://github.com/cucumber/godog/pull/454) - [mxygem](https://github.com/mxygem))

cmd/godog/internal/cmd_build.go

@@ -5,7 +5,9 @@ import (
 	"go/build"
 	"path/filepath"
 
+	"github.com/cucumber/godog/colors"
 	"github.com/cucumber/godog/internal/builder"
+
 	"github.com/spf13/cobra"
 )
 
@@ -37,6 +39,9 @@ The test runner can be executed with the same flags as when using godog run.`,
 }
 
 func buildCmdRunFunc(cmd *cobra.Command, args []string) error {
+	fmt.Println(colors.Yellow("Use of godog CLI is deprecated, please use *testing.T instead."))
+	fmt.Println(colors.Yellow("See https://github.com/cucumber/godog/discussions/478 for details."))
+
 	bin, err := filepath.Abs(buildOutput)
 	if err != nil {
 		return fmt.Errorf("could not locate absolute path for: %q. reason: %v", buildOutput, err)

cmd/godog/internal/cmd_root.go

@@ -44,7 +44,8 @@ func runRootCmd(cmd *cobra.Command, args []string) error {
 		}
 	}
 
-	fmt.Println(colors.Yellow("Use of godog without a sub-command is deprecated. Please use godog build, godog run or godog version."))
+	fmt.Println(colors.Yellow("Use of godog CLI is deprecated, please use *testing.T instead."))
+	fmt.Println(colors.Yellow("See https://github.com/cucumber/godog/discussions/478 for details."))
 	return runCmdRunFunc(cmd, args)
 }
 

cmd/godog/internal/cmd_run.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/spf13/cobra"
 
+	"github.com/cucumber/godog/colors"
 	"github.com/cucumber/godog/internal/builder"
 	"github.com/cucumber/godog/internal/flags"
 )
@@ -42,6 +43,9 @@ buildable go source.`,
 }
 
 func runCmdRunFunc(cmd *cobra.Command, args []string) error {
+	fmt.Println(colors.Yellow("Use of godog CLI is deprecated, please use *testing.T instead."))
+	fmt.Println(colors.Yellow("See https://github.com/cucumber/godog/discussions/478 for details."))
+
 	osArgs := os.Args[1:]
 
 	if len(osArgs) > 0 && osArgs[0] == "run" {