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/docker/compose/tests/cleanup.cue

@@ -0,0 +1,93 @@
+package compose
+
+import (
+	"strconv"
+
+	"alpha.dagger.io/dagger"
+	"alpha.dagger.io/dagger/op"
+)
+
+#CleanupCompose: {
+	// docker-compose up context
+	context: dagger.#Artifact
+
+	// App name (use as COMPOSE_PROJECT_NAME)
+	name: *"source" | string
+
+	ssh: {
+		// ssh host
+		host: string @dagger(input)
+
+		// ssh user
+		user: string @dagger(input)
+
+		// ssh port
+		port: *22 | int @dagger(input)
+
+		// private key
+		key: dagger.#Secret @dagger(input)
+
+		// fingerprint
+		fingerprint?: string @dagger(input)
+
+		// ssh key passphrase
+		keyPassphrase?: dagger.#Secret @dagger(input)
+	}
+
+	#code: #"""
+				# Export host
+				export DOCKER_HOST="unix://$(pwd)/docker.sock"
+
+				# Start ssh agent
+				eval $(ssh-agent) > /dev/null
+				ssh-add /key > /dev/null
+
+				ssh -i /key -o "StreamLocalBindUnlink=yes" -fNT -L "$(pwd)"/docker.sock:/var/run/docker.sock -p "$DOCKER_PORT" "$DOCKER_USERNAME"@"$DOCKER_HOSTNAME" || true
+
+				# Down
+				if [ -d /source ]; then
+					cd /source
+				fi
+
+				docker-compose down -v
+		"""#
+
+	#up: [
+		op.#Load & {from: context},
+
+		op.#WriteFile & {
+			content: #code
+			dest:    "/entrypoint.sh"
+		},
+
+		op.#Exec & {
+			always: true
+			args: [
+				"/bin/sh",
+				"--noprofile",
+				"--norc",
+				"-eo",
+				"pipefail",
+				"/entrypoint.sh",
+			]
+			env: {
+				DOCKER_HOSTNAME:      ssh.host
+				DOCKER_USERNAME:      ssh.user
+				DOCKER_PORT:          strconv.FormatInt(ssh.port, 10)
+				COMPOSE_PROJECT_NAME: name
+				if ssh.keyPassphrase != _|_ {
+					SSH_ASKPASS: "/get_passphrase"
+					DISPLAY:     "1"
+				}
+			}
+			mount: {
+				if ssh.key != _|_ {
+					"/key": secret: ssh.key
+				}
+				if ssh.keyPassphrase != _|_ {
+					"/passphrase": secret: ssh.keyPassphrase
+				}
+			}
+		},
+	]
+}