Don't make missing providers-config fatal on first-run

README.md

@@ -242,23 +242,16 @@ import (
 )
 
 func main() {
-	config := runner.ConfigFile{
-		// Use the default list of resolvers by marshaling it to the config
-		Resolvers: resolve.DefaultResolvers,
-		// Use the default list of passive sources
-		Sources: passive.DefaultSources,
-		// Use the default list of all passive sources
-		AllSources: passive.DefaultAllSources,
-		// Use the default list of recursive sources
-		Recursive: passive.DefaultRecursiveSources,
-	}
-
 	runnerInstance, err := runner.NewRunner(&runner.Options{
 		Threads:            10, // Thread controls the number of threads to use for active enumerations
 		Timeout:            30, // Timeout is the seconds to wait for sources to respond
 		MaxEnumerationTime: 10, // MaxEnumerationTime is the maximum amount of time in mins to wait for enumeration
-		YAMLConfig:         config,
-	})
+		Resolvers:          resolve.DefaultResolvers, // Use the default list of resolvers by marshaling it to the config
+		Sources:            passive.DefaultSources, // Use the default list of passive sources
+		AllSources:         passive.DefaultAllSources, // Use the default list of all passive sources
+		Recursive:          passive.DefaultRecursiveSources,	// Use the default list of recursive sources
+		Providers:          &runner.Providers{}, // Use empty api keys for all providers
+  })
 
 	buf := bytes.Buffer{}
 	err = runnerInstance.EnumerateSingleDomain(context.Background(), "projectdiscovery.io", []io.Writer{&buf})

v2/pkg/runner/banners.go

@@ -1,6 +1,9 @@
 package runner
 
 import (
+	"errors"
+	"os"
+
 	"github.com/projectdiscovery/gologger"
 	"github.com/projectdiscovery/subfinder/v2/pkg/passive"
 	"github.com/projectdiscovery/subfinder/v2/pkg/resolve"
@@ -44,7 +47,9 @@ func (options *Options) loadProvidersFrom(location string) {
 	}
 
 	options.Providers = &Providers{}
-	if err := options.Providers.UnmarshalFrom(location); isFatalErr(err) {
+	// We skip bailing out if file doesn't exist because we'll create it
+	// at the end of options parsing from default via goflags.
+	if err := options.Providers.UnmarshalFrom(location); isFatalErr(err) && !errors.Is(err, os.ErrNotExist) {
 		gologger.Fatal().Msgf("Could not read providers from %s: %s\n", location, err)
 	}
 }