feat: add flag to always run the checkout action (#1049)

act has a feature that skips the checkout action to do a remote
checkout when a local checkout exists. in some cases, e.g. when
running act in a CI, you always want to clone the repository.

pkg/runner/run_context.go

@@ -708,6 +708,10 @@ func setActionRuntimeVars(rc *RunContext, env map[string]string) {
 }
 
 func (rc *RunContext) localCheckoutPath() (string, bool) {
+	if rc.Config.NoSkipCheckout {
+		return "", false
+	}
+
 	ghContext := rc.getGithubContext()
 	for _, step := range rc.Run.Job().Steps {
 		if isLocalCheckout(ghContext, step) {

pkg/runner/runner.go

@@ -48,6 +48,7 @@ type Config struct {
 	ArtifactServerPath    string                       // the path where the artifact server stores uploads
 	ArtifactServerPort    string                       // the port the artifact server binds to
 	CompositeRestrictions *model.CompositeRestrictions // describes which features are available in composite actions
+	NoSkipCheckout        bool                         // do not skip actions/checkout
 }
 
 // Resolves the equivalent host path inside the container

pkg/runner/step_context.go

@@ -92,7 +92,7 @@ func (sc *StepContext) Executor(ctx context.Context) common.Executor {
 		remoteAction.URL = rc.Config.GitHubInstance
 
 		github := rc.getGithubContext()
-		if remoteAction.IsCheckout() && isLocalCheckout(github, step) {
+		if remoteAction.IsCheckout() && isLocalCheckout(github, step) && !rc.Config.NoSkipCheckout {
 			return func(ctx context.Context) error {
 				common.Logger(ctx).Debugf("Skipping local actions/checkout because workdir was already copied")
 				return nil