feat(kubernetes): add kustomize generation to kubernetes stdlib package

test(kubernetes): add test for kustomize

Signed-off-by: Tom Chauveau <tom.chauveau@epitech.eu>

stdlib/kubernetes/kustomize/kustomization.cue

@@ -0,0 +1,98 @@
+package kustomize
+
+import (
+	"dagger.io/dagger/op"
+	"dagger.io/dagger"
+	"dagger.io/alpine"
+)
+
+#Kustomization: {
+	// Kustomize binary version
+	version: *"v3.8.7" | string
+
+	#code: #"""
+		[ -e /usr/local/bin/kubectl ] || {
+			curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" | bash && mv kustomize /usr/local/bin
+		}
+		"""#
+
+	#up: [
+		op.#Load & {
+			from: alpine.#Image & {
+				package: bash: "=~5.1"
+				package: jq:   "=~1.6"
+				package: curl: "=~7.76"
+			}
+		},
+
+		op.#WriteFile & {
+			dest:    "/entrypoint.sh"
+			content: #code
+		},
+
+		op.#Exec & {
+			args: [
+				"/bin/bash",
+				"--noprofile",
+				"--norc",
+				"-eo",
+				"pipefail",
+				"/entrypoint.sh",
+			]
+		},
+	]
+}
+
+// Apply a Kubernetes Kustomize folder
+#Kustomize: {
+	// Kubernetes source
+	source: dagger.#Artifact
+
+	// Optional Kustomization file
+	kustomization: string
+
+	// Kustomize binary version
+	version: *"v3.8.7" | string
+
+	#code: #"""
+		cp /kustomization.yaml /source | true
+		mkdir -p /output
+		kustomize build /source >> /output/result.yaml
+		"""#
+
+	#up: [
+		op.#Load & {
+			from: #Kustomization & {"version": version}
+		},
+
+		op.#WriteFile & {
+			dest:    "/entrypoint.sh"
+			content: #code
+		},
+
+		if kustomization != _|_ {
+			op.#WriteFile & {
+				dest:    "/kustomization.yaml"
+				content: kustomization
+				mode:    0o600
+			}
+		},
+
+		op.#Exec & {
+			always: true
+			args: [
+				"/bin/bash",
+				"--noprofile",
+				"--norc",
+				"-eo",
+				"pipefail",
+				"/entrypoint.sh",
+			]
+			mount: "/source": from: source
+		},
+
+		op.#Subdir & {
+			dir: "/output"
+		},
+	]
+}