Introduce badass "doNotFail option"

app/app.go

@@ -23,6 +23,7 @@ type Options struct {
 	PushPrefix         string `short:"R" long:"push-prefix" description:"[Re]Push pulled images with a specified repo path prefix" env:"PUSH_PREFIX"`
 	InsecureRegistry   bool   `short:"i" long:"insecure-registry" description:"Use insecure plain-HTTP connection to registries (not recommended!)" env:"INSECURE_REGISTRY"`
 	TraceRequests      bool   `short:"T" long:"trace-requests" description:"Trace Docker registry HTTP requests" env:"TRACE_REQUESTS"`
+	DoNotFail          bool   `short:"N" long:"do-not-fail" description:"Do not fail on errors (could be dangerous!)" env:"DO_NOT_FAIL"`
 	Version            bool   `short:"V" long:"version" description:"Show version and exit"`
 	Positional         struct {
 		Repositories []string `positional-arg-name:"REPO1 REPO2 REPOn" description:"Docker repositories to operate on, e.g.: alpine nginx~/1\\.13\\.5$/ busybox~/1.27.2/"`

main.go

@@ -12,9 +12,14 @@ import (
 	"github.com/ivanilves/lstags/tag/registry"
 )
 
+var doNotFail bool
+
 func suicide(err error) {
 	fmt.Printf("%s\n", err.Error())
-	os.Exit(1)
+
+	if !doNotFail {
+		os.Exit(1)
+	}
 }
 
 func getVersion() string {
@@ -49,6 +54,8 @@ func main() {
 	auth.WebSchema = o.GetWebSchema()
 	registry.WebSchema = o.GetWebSchema()
 
+	doNotFail = o.DoNotFail
+
 	const format = "%-12s %-45s %-15s %-25s %s\n"
 	fmt.Printf(format, "<STATE>", "<DIGEST>", "<(local) ID>", "<Created At>", "<TAG>")