From 53cb3febb420a3028b646c4796c7ab3b0be9aa3c Mon Sep 17 00:00:00 2001
From: Yael Harel <yharel@vmware.com>
Date: Mon, 12 Sep 2022 16:21:58 -0400
Subject: [PATCH] Enable setting SOURCE_DATA_EPOCH

This environment variable is the timestamp for created time in app image config

Fixes #1009

Signed-off-by: Yael Harel <yharel@vmware.com>
---
 pkg/apis/build/v1alpha2/build_pod.go      | 17 ++++++++++++++---
 pkg/apis/build/v1alpha2/build_pod_test.go |  4 ++++
 pkg/apis/build/v1alpha2/build_types.go    |  1 +
 pkg/apis/build/v1alpha2/image_builds.go   |  1 +
 pkg/apis/build/v1alpha2/image_types.go    |  1 +
 5 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/pkg/apis/build/v1alpha2/build_pod.go b/pkg/apis/build/v1alpha2/build_pod.go
index 556020e12..1bd1085f6 100644
--- a/pkg/apis/build/v1alpha2/build_pod.go
+++ b/pkg/apis/build/v1alpha2/build_pod.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"github.com/Masterminds/semver/v3"
 	"github.com/google/go-containerregistry/pkg/name"
@@ -592,6 +593,13 @@ func (b *Build) BuildPod(images BuildPodImages, buildContext BuildContext) (*cor
 								homeEnv,
 								platformApiVersionEnvVar,
 							},
+							func() corev1.EnvVar {
+								if b.Spec.SetEpochTime {
+									return corev1.EnvVar{Name: "SOURCE_DATE_EPOCH", Value: time.Now().String()}
+								} else {
+									return corev1.EnvVar{Name: "", Value: ""}
+								}
+							}(),
 							func() corev1.EnvVar {
 								return corev1.EnvVar{
 									Name:  "CNB_RUN_IMAGE",
@@ -1211,9 +1219,12 @@ func cosignSecretArgs(secret corev1.Secret) []string {
 	return cosignArgs
 }
 
-func envs(envs []corev1.EnvVar, envVar corev1.EnvVar) []corev1.EnvVar {
-	if envVar.Name != "" && envVar.Value != "" {
-		envs = append(envs, envVar)
+func envs(envs []corev1.EnvVar, envVar1 corev1.EnvVar, envVar2 corev1.EnvVar) []corev1.EnvVar {
+	if envVar1.Name != "" && envVar1.Value != "" {
+		envs = append(envs, envVar1)
+	}
+	if envVar2.Name != "" && envVar2.Value != "" {
+		envs = append(envs, envVar2)
 	}
 	return envs
 }
diff --git a/pkg/apis/build/v1alpha2/build_pod_test.go b/pkg/apis/build/v1alpha2/build_pod_test.go
index 93d45be38..d4c3bf32d 100644
--- a/pkg/apis/build/v1alpha2/build_pod_test.go
+++ b/pkg/apis/build/v1alpha2/build_pod_test.go
@@ -334,6 +334,7 @@ func testBuildPod(t *testing.T, when spec.G, it spec.S) {
 				Tolerations:  []corev1.Toleration{{Key: "some-key"}},
 				NodeSelector: map[string]string{"foo": "bar"},
 				Affinity:     &corev1.Affinity{},
+				SetEpochTime: true,
 			},
 		}
 	})
@@ -1069,6 +1070,9 @@ func testBuildPod(t *testing.T, when spec.G, it spec.S) {
 			assert.Equal(t, pod.Spec.InitContainers[5].Name, "export")
 			assert.Equal(t, pod.Spec.InitContainers[5].Image, builderImage)
 			assert.Contains(t, pod.Spec.InitContainers[5].Env, corev1.EnvVar{Name: "CNB_PLATFORM_API", Value: "0.8"})
+			_, ok := fetchEnvVar(pod.Spec.InitContainers[5].Env, "SOURCE_DATE_EPOCH")
+			assert.Equal(t, true, ok)
+			assert.Contains(t, pod.Spec.InitContainers[5].Env, corev1.EnvVar{Name: "CNB_RUN_IMAGE", Value: "builderregistry.io/run"})
 			assert.ElementsMatch(t, names(pod.Spec.InitContainers[5].VolumeMounts), []string{
 				"layers-dir",
 				"workspace-dir",
diff --git a/pkg/apis/build/v1alpha2/build_types.go b/pkg/apis/build/v1alpha2/build_types.go
index 053fb2e8e..9f3b9006d 100644
--- a/pkg/apis/build/v1alpha2/build_types.go
+++ b/pkg/apis/build/v1alpha2/build_types.go
@@ -77,6 +77,7 @@ type BuildSpec struct {
 	RuntimeClassName  *string             `json:"runtimeClassName,omitempty"`
 	SchedulerName     string              `json:"schedulerName,omitempty"`
 	PriorityClassName string              `json:"priorityClassName,omitempty"`
+	SetEpochTime	  bool                `json:"setEpochTime,omitempty"`
 }
 
 func (bs *BuildSpec) RegistryCacheTag() string {
diff --git a/pkg/apis/build/v1alpha2/image_builds.go b/pkg/apis/build/v1alpha2/image_builds.go
index 73756486e..278998501 100644
--- a/pkg/apis/build/v1alpha2/image_builds.go
+++ b/pkg/apis/build/v1alpha2/image_builds.go
@@ -80,6 +80,7 @@ func (im *Image) Build(sourceResolver *SourceResolver, builder BuilderResource,
 			SchedulerName:         im.SchedulerName(),
 			PriorityClassName:     priorityClass,
 			ActiveDeadlineSeconds: im.BuildTimeout(),
+			SetEpochTime:          im.Spec.Build.SetEpochTime,
 		},
 	}
 }
diff --git a/pkg/apis/build/v1alpha2/image_types.go b/pkg/apis/build/v1alpha2/image_types.go
index 81b202743..8f87ed132 100644
--- a/pkg/apis/build/v1alpha2/image_types.go
+++ b/pkg/apis/build/v1alpha2/image_types.go
@@ -78,6 +78,7 @@ type ImageBuild struct {
 	RuntimeClassName *string             `json:"runtimeClassName,omitempty"`
 	SchedulerName    string              `json:"schedulerName,omitempty"`
 	BuildTimeout     *int64              `json:"buildTimeout,omitempty"`
+	SetEpochTime     bool                `json:"setEpochTime,omitempty"`
 }
 
 // +k8s:openapi-gen=true