cue modules: move stdlib to pkg/alpha.dagger.io

In preparation for Europa, we will vendor multiple CUE modules:

- `pkg/alpha.dagger.io`: legacy non-europa packages
- `pkg/dagger.io`: core Europa packages
- `pkg/universe.dagger.io`: Europa universe

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

pkg/alpha.dagger.io/gcp/gcs/tests/gcs.cue

@@ -0,0 +1,43 @@
+package gcs
+
+import (
+	"alpha.dagger.io/dagger"
+	"alpha.dagger.io/gcp"
+	"alpha.dagger.io/random"
+)
+
+TestConfig: {
+	gcpConfig: gcp.#Config
+	bucket:    string @dagger(input)
+}
+
+TestDirectory: dagger.#Artifact
+
+TestGCSObject: {
+	suffix: random.#String & {
+		seed: "gcs"
+	}
+
+	target: "gs://\(TestConfig.bucket)/\(suffix.out)/"
+
+	deploy: #Object & {
+		always:   true
+		config:   TestConfig.gcpConfig
+		source:   TestDirectory
+		"target": target
+	}
+
+	verifyFile: #VerifyGCS & {
+		config: TestConfig.gcpConfig
+		target: deploy.target
+		url:    deploy.url
+		file:   "dirFile.txt"
+	}
+
+	verifyDir: #VerifyGCS & {
+		config: TestConfig.gcpConfig
+		target: deploy.target
+		url:    deploy.url
+		file:   "foo.txt"
+	}
+}

pkg/alpha.dagger.io/gcp/gcs/tests/testdata/bar/foo.txt

@@ -0,0 +1 @@
+Test recursivity

pkg/alpha.dagger.io/gcp/gcs/tests/testdata/dirFile.txt

@@ -0,0 +1 @@
+Test directory

pkg/alpha.dagger.io/gcp/gcs/tests/verify.cue

@@ -0,0 +1,89 @@
+package gcs
+
+import (
+	"alpha.dagger.io/alpine"
+	"alpha.dagger.io/dagger/op"
+	"alpha.dagger.io/gcp"
+)
+
+#List: {
+	// GCP Config
+	config: gcp.#Config
+
+	// Target GCP URL (e.g. gs://<bucket-name>/<path>/<sub-path>)
+	target: string
+
+	// URL: dummy URL, used to force a dependency
+	url: string
+
+	contents: {
+		string
+
+		#up: [
+			op.#Load & {
+				from: gcp.#GCloud & {
+					"config": config
+				}
+			},
+
+			op.#Exec & {
+				args: [
+					"/bin/bash",
+					"--noprofile",
+					"--norc",
+					"-eo",
+					"pipefail",
+					"-c",
+					#"""
+					gsutil ls -r \#(target) > /contents
+					"""#,
+				]
+				env: URL: url
+			},
+
+			op.#Export & {
+				source: "/contents"
+				format: "string"
+			},
+		]
+	}
+}
+
+#VerifyGCS: {
+	file:   string
+	config: gcp.#Config
+	target: string
+	url:    string
+
+	lists: #List & {
+		"config": config
+		"target": target
+		"url":    url
+	}
+
+	test: #up: [
+		op.#Load & {
+			from: alpine.#Image & {
+				package: bash: true
+			}
+		},
+
+		op.#WriteFile & {
+			dest:    "/test"
+			content: lists.contents
+		},
+
+		op.#Exec & {
+			always: true
+			args: [
+				"/bin/bash",
+				"--noprofile",
+				"--norc",
+				"-eo",
+				"pipefail",
+				"-c",
+				"grep -q \(file) /test",
+			]
+		},
+	]
+}