ported alpine to europa

Signed-off-by: Richard Jones <richard@dagger.io>

pkg/universe.dagger.io/alpine/alpine.cue

@@ -5,13 +5,10 @@ import (
 	"universe.dagger.io/docker"
 )
 
-// Default Alpine version
-let defaultVersion = "3.13.5@sha256:69e70a79f2d41ab5d637de98c1e0b055206ba40a8145e7bddb55ccc04e13cf8f"
-
 // Build an Alpine Linux container image
 #Build: {
 	// Alpine version to install
-	version: string | *defaultVersion
+	version: string | *"latest"
 
 	// List of packages to install
 	packages: [pkgName=string]: version: string | *""

pkg/universe.dagger.io/alpine/test/image-version.cue

@@ -0,0 +1,22 @@
+package test
+
+import (
+	"dagger.io/dagger"
+	"dagger.io/dagger/engine"
+	"universe.dagger.io/alpine"
+)
+
+dagger.#Plan & {
+	actions: {
+		build: alpine.#Build & {
+			// install an old version on purpose
+			version: "3.10.9"
+		}
+
+		check: engine.#Readfile & {
+			input:    build.output.rootfs
+			path:     "/etc/alpine-release"
+			contents: "3.10.9\n"
+		}
+	}
+}

pkg/universe.dagger.io/alpine/test/package-install.cue

@@ -0,0 +1,31 @@
+package test
+
+import (
+	"dagger.io/dagger"
+	"universe.dagger.io/alpine"
+	"universe.dagger.io/docker"
+)
+
+dagger.#Plan & {
+	actions: {
+		build: alpine.#Build & {
+			packages: {
+				jq: {}
+				curl: {}
+			}
+		}
+
+		check: docker.#Run & {
+			image: build.output
+			script: """
+				jq --version > /jq-version.txt
+				curl --version > /curl-version.txt
+				"""
+
+			export: files: {
+				"/jq-version.txt": contents:   =~"^jq"
+				"/curl-version.txt": contents: =~"^curl"
+			}
+		}
+	}
+}

pkg/universe.dagger.io/alpine/tests/simple/simple.cue

@@ -1,38 +0,0 @@
-package alpine
-
-import (
-	"universe.dagger.io/docker"
-)
-
-TestImageVersion: {
-	build: #Build & {
-		// install an old version on purpose
-		version: "3.10.9"
-	}
-
-	check: docker.#Run & {
-		image: build.output
-		output: files: "/etc/alpine-release": contents: "3.10.9"
-	}
-}
-
-TestPackageInstall: {
-	build: #Build & {
-		packages: {
-			jq: {}
-			curl: {}
-		}
-	}
-
-	check: docker.#Run & {
-		script: """
-			jq --version > /jq-version.txt
-			curl --version > /curl-version.txt
-			"""
-
-		output: files: {
-			"/jq-version.txt": contents:   "FIXME"
-			"/curl-version.txt": contents: "FIXME"
-		}
-	}
-}