Add CNAB support

Signed-off-by: Christopher Crone <christopher.crone@docker.com>

.gitignore

@@ -6,7 +6,8 @@
 _build/
 bin/
 !examples/simple/*.dockerapp
-!e2e/**/*.dockerapp
+!**/testdata/**/*.dockerapp
 .gradle
 coverage.html
 cover.out
+**/bundle.json

BUILDING.md

@@ -30,7 +30,7 @@ end you need to have `GOPATH` set in your environment.
 
 At this point you can use `go` to checkout `docker-app` in your `GOPATH`:
 
-```console
+```sh
 go get github.com/docker/app
 ```
 
@@ -39,14 +39,14 @@ You are ready to build `docker-app` yourself!
 `docker-app` uses `make` to create a repeatable build flow. It means that you
 can run:
 
-```console
+```sh
 make
 ```
 
 This is going to build all the project binaries in the `./bin/`
 directory, run tests (unit and end-to-end).
 
-```console
+```sh
 make bin/docker-app             # builds the docker-app binary
 make bin/docker-app-darwin      # builds the docker-app binary for darwin
 make bin/docker-app-windows.exe # builds the docker-app binary for windows
@@ -59,16 +59,6 @@ make test-e2e                   # run the end-to-end tests
 Vendoring of external imports uses the [`dep`](https://github.com/golang/dep) tool.
 Please refer to its documentation if you need to update a dependency.
 
-### Experimental
-
-Just add the `EXPERIMENTAL=on` flag before invoking a build target:
-```console
-$ make EXPERIMEMTAL=on bin/docker-app
-$ ./bin/docker-app version
-...
-Experimental: on
-```
-
 ## Build using Docker
 
 If you don't have Go installed but Docker is present, you can also use
@@ -99,7 +89,7 @@ capabilities without using the `Makefile` targets. The following
 examples show how to specify a test name and also how to use the flag
 directly against `go test` to run root-requiring tests.
 
-```console
+```sh
 # run the test <TEST_NAME>:
 go test -v -run "<TEST_NAME>" .
 ```

Dockerfile

@@ -10,13 +10,15 @@ RUN apk add --no-cache \
   git \
   curl \
   util-linux \
-  coreutils
+  coreutils \
+  build-base
 RUN curl -Ls https://download.docker.com/linux/static/$DOCKERCLI_CHANNEL/x86_64/docker-$DOCKERCLI_VERSION.tgz | \
   tar -xz docker/docker && \
   mv docker/docker /usr/bin/docker
 
 WORKDIR /go/src/github.com/docker/app/
 
+# main dev image
 FROM build AS dev
 ENV PATH=${PATH}:/go/src/github.com/docker/app/bin/
 ARG DEP_VERSION=v0.5.0
@@ -26,14 +28,39 @@ RUN go get -d gopkg.in/mjibson/esc.v0 && \
     cd /go/src/github.com/mjibson/esc && \
     go build -v -o /usr/bin/esc . && \
     rm -rf /go/src/* /go/pkg/* /go/bin/*
+COPY vendor/github.com/deis/duffle /go/src/github.com/deis/duffle
+# Build duffle and init
+RUN (cd /go/src/github.com/deis/duffle && \
+  make bootstrap build-release && \
+  ./bin/duffle-linux-amd64 init)
 COPY . .
 
 # FIXME(vdemeester) change from docker-app to dev once buildkit is merged in moby/docker
 FROM dev AS cross
 ARG EXPERIMENTAL="off"
-RUN make EXPERIMENTAL=${EXPERIMENTAL} cross
+ARG TAG
+ARG COMMIT
+RUN make EXPERIMENTAL=${EXPERIMENTAL} TAG=${TAG} COMMIT=${COMMIT} cross
 
 # FIXME(vdemeester) change from docker-app to dev once buildkit is merged in moby/docker
 FROM cross AS e2e-cross
 ARG EXPERIMENTAL="off"
-RUN make EXPERIMENTAL=${EXPERIMENTAL} e2e-cross
+# Run e2e tests
+ARG TAG
+ARG COMMIT
+RUN make EXPERIMENTAL=${EXPERIMENTAL} TAG=${TAG} COMMIT=${COMMIT} e2e-cross
+
+# builder of invocation image entrypoint
+FROM build AS invocation-build
+COPY . .
+ARG EXPERIMENTAL="off"
+ARG TAG
+ARG COMMIT
+RUN make EXPERIMENTAL=${EXPERIMENTAL} TAG=${TAG} COMMIT=${COMMIT} bin/run
+
+# cnab invocation image
+FROM alpine:${ALPINE_VERSION} AS invocation
+RUN apk add --no-cache ca-certificates
+COPY --from=invocation-build /go/src/github.com/docker/app/bin/run /cnab/app/run
+WORKDIR /cnab/app
+CMD /cnab/app/run