customize clone image

command/daemon/config.go

@@ -58,6 +58,7 @@ type Config struct {
 		Devices    []string          `envconfig:"DRONE_RUNNER_DEVICES"`
 		Networks   []string          `envconfig:"DRONE_RUNNER_NETWORKS"`
 		Privileged []string          `envconfig:"DRONE_RUNNER_PRIVILEGED_IMAGES"`
+		Clone      string            `envconfig:"DRONE_RUNNER_CLONE_IMAGE"`
 	}
 
 	Platform struct {

command/daemon/daemon.go

@@ -119,6 +119,7 @@ func (c *daemonCommand) run(*kingpin.ParseContext) error {
 				config.Limit.Trusted,
 			),
 			Compiler: &compiler.Compiler{
+				Clone:      config.Runner.Clone,
 				Environ:    config.Runner.Environ,
 				Privileged: append(config.Runner.Privileged, compiler.Privileged...),
 				Networks:   config.Runner.Networks,

engine/compiler/compiler.go

@@ -114,6 +114,10 @@ type Compiler struct {
 	// mounted to each pipeline container.
 	Volumes map[string]string
 
+	// Clone overrides the default plugin image used
+	// when cloning a repository.
+	Clone string
+
 	// Resources provides global resource constraints
 	// applies to pipeline containers.
 	Resources Resources
@@ -269,6 +273,12 @@ func (c *Compiler) Compile(ctx context.Context, args Args) *engine.Spec {
 		step.Volumes = append(step.Volumes, mount)
 		spec.Steps = append(spec.Steps, step)
 
+		// if the clone image is customized, override
+		// the default image.
+		if c.Clone != "" {
+			step.Image = c.Clone
+		}
+
 		// if the repository is mounted from a local
 		// volume we should disable cloning.
 		if c.Mount != "" {