docker build support

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

tests/dockerbuild/main.cue

@@ -0,0 +1,90 @@
+package test
+
+import "dagger.io/dagger"
+
+// Set to `--input-dir=./tests/dockerbuild/testdata`
+TestData: dagger.#Dir
+
+TestInlinedDockerfile: #dagger: compute: [
+	dagger.#DockerBuild & {
+		dockerfile: """
+			FROM alpine:latest@sha256:ab00606a42621fb68f2ed6ad3c88be54397f981a7b70a79db3d1172b11c4367d
+			RUN echo hello world
+			"""
+	},
+]
+
+TestOpChaining: #dagger: compute: [
+	dagger.#DockerBuild & {
+		dockerfile: """
+			FROM alpine:latest@sha256:ab00606a42621fb68f2ed6ad3c88be54397f981a7b70a79db3d1172b11c4367d
+			RUN echo foobar > /output
+			"""
+	},
+	dagger.#Exec & {
+		args: ["sh", "-c", "test $(cat /output) = foobar"]
+	}
+]
+
+TestBuildContext: #dagger: compute: [
+	dagger.#DockerBuild & {
+		context: TestData
+	},
+	dagger.#Exec & {
+		args: ["sh", "-c", "test $(cat /dir/foo) = foobar"]
+	}
+]
+
+TestBuildContextAndDockerfile: #dagger: compute: [
+	dagger.#DockerBuild & {
+		context: TestData
+		dockerfile: """
+			FROM alpine:latest@sha256:ab00606a42621fb68f2ed6ad3c88be54397f981a7b70a79db3d1172b11c4367d
+			COPY foo /override
+			"""
+	},
+	dagger.#Exec & {
+		args: ["sh", "-c", "test $(cat /override) = foobar"]
+	}
+]
+
+TestDockerfilePath: #dagger: compute: [
+	dagger.#DockerBuild & {
+		context: TestData
+		dockerfilePath: "./dockerfilepath/Dockerfile.custom"
+	},
+	dagger.#Exec & {
+		args: ["sh", "-c", "test $(cat /test) = dockerfilePath"]
+	}
+]
+
+TestBuildArgs: #dagger: compute: [
+	dagger.#DockerBuild & {
+		dockerfile: """
+			FROM alpine:latest@sha256:ab00606a42621fb68f2ed6ad3c88be54397f981a7b70a79db3d1172b11c4367d
+			ARG TEST=foo
+			RUN test "${TEST}" = "bar"
+			"""
+		buildArg: TEST: "bar"
+	}
+]
+
+// FIXME: this doesn't test anything beside not crashing
+TestBuildLabels: #dagger: compute: [
+	dagger.#DockerBuild & {
+		dockerfile: """
+			FROM alpine:latest@sha256:ab00606a42621fb68f2ed6ad3c88be54397f981a7b70a79db3d1172b11c4367d
+			"""
+		label: FOO: "bar"
+	}
+]
+
+// FIXME: this doesn't test anything beside not crashing
+TestBuildPlatform: #dagger: compute: [
+	dagger.#DockerBuild & {
+		dockerfile: """
+			FROM alpine:latest@sha256:ab00606a42621fb68f2ed6ad3c88be54397f981a7b70a79db3d1172b11c4367d
+			"""
+		platforms: ["linux/amd64"]
+	}
+]

tests/dockerbuild/testdata/Dockerfile

@@ -0,0 +1,3 @@
+FROM alpine:latest@sha256:ab00606a42621fb68f2ed6ad3c88be54397f981a7b70a79db3d1172b11c4367d
+COPY . /dir
+RUN test $(cat /dir/foo) = foobar

tests/dockerbuild/testdata/dockerfilepath/Dockerfile.custom

@@ -0,0 +1,2 @@
+FROM alpine:latest@sha256:ab00606a42621fb68f2ed6ad3c88be54397f981a7b70a79db3d1172b11c4367d
+RUN echo dockerfilePath > /test

tests/dockerbuild/testdata/foo

@@ -0,0 +1 @@
+foobar

tests/test.sh

@@ -229,6 +229,11 @@ test::subdir() {
       "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/subdir/simple
 }
 
+test::dockerbuild() {
+  test::one "Docker Build" --exit=0 \
+      "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute --input-dir TestData="$d"/dockerbuild/testdata "$d"/dockerbuild
+}
+
 test::all(){
   local dagger="$1"
 
@@ -244,6 +249,7 @@ test::all(){
   test::export "$dagger"
   test::input "$dagger"
   test::subdir "$dagger"
+  test::dockerbuild "$dagger"
 
   test::examples "$dagger"
 }