initial commit [ci skip]

engine/compiler/clone.go

@@ -0,0 +1,53 @@
+// Copyright 2019 Drone.IO Inc. All rights reserved.
+// Use of this source code is governed by the Polyform License
+// that can be found in the LICENSE file.
+
+package compiler
+
+import (
+	"strconv"
+
+	"github.com/drone-runners/drone-runner-docker/engine"
+	"github.com/drone-runners/drone-runner-docker/engine/resource"
+	"github.com/drone/runner-go/manifest"
+)
+
+// default name of the clone step.
+const cloneStepName = "clone"
+
+// helper function returns the clone image based on the
+// target operating system.
+func cloneImage(platform manifest.Platform) string {
+	switch platform.OS {
+	case "windows":
+		return "drone/git:latest"
+	default:
+		return "drone/git:1"
+	}
+}
+
+// helper function configures the clone depth parameter,
+// specific to the clone plugin.
+func cloneParams(src manifest.Clone) map[string]string {
+	dst := map[string]string{}
+	if depth := src.Depth; depth > 0 {
+		dst["PLUGIN_DEPTH"] = strconv.Itoa(depth)
+	}
+	if skipVerify := src.SkipVerify; skipVerify {
+		dst["GIT_SSL_NO_VERIFY"] = "true"
+		dst["PLUGIN_SKIP_VERIFY"] = "true"
+	}
+	return dst
+}
+
+// helper function creates a default container configuration
+// for the clone stage. The clone stage is automatically
+// added to each pipeline.
+func createClone(src *resource.Pipeline) *engine.Step {
+	return &engine.Step{
+		Name:      cloneStepName,
+		Image:     cloneImage(src.Platform),
+		RunPolicy: engine.RunAlways,
+		Envs:      cloneParams(src.Clone),
+	}
+}