Replace docker.Makefile with a bash script.

Signed-off-by: Daniel Nephin <dnephin@docker.com>

README.md

@@ -9,32 +9,33 @@ Docker EE products.
 Development
 ===========
 
-`docker/cli` is developed using Docker.
+`docker/cli` is developed using Docker. The `./tasks` script is used to run
+build Docker images and run Docker containers.
 
 Build a linux binary:
 
 ```
-$ make -f docker.Makefile binary
+$ ./tasks binary
 ```
 
 Build binaries for all supported platforms:
 
 ```
-$ make -f docker.Makefile cross
+$ ./tasks cross
 ```
 
 Run all linting:
 
 ```
-$ make -f docker.Makefile lint
+$ ./tasks lint
 ```
 
 ### In-container development environment
 
 Start an interactive development environment:
 
 ```
-$ make -f docker.Makefile shell
+$ ./tasks shell
 ```
 
 In the development environment you can run many tasks, including build binaries:

dockerfiles/Dockerfile.lint

@@ -1,11 +1,10 @@
 FROM    golang:1.8-alpine
 
-RUN     apk add -U git
+RUN     apk add -U git make
 
 RUN     go get -u gopkg.in/alecthomas/gometalinter.v1 && \
         mv /go/bin/gometalinter.v1 /usr/local/bin/gometalinter && \
         gometalinter --install
 
 WORKDIR /go/src/github.com/docker/cli
-ENTRYPOINT ["/usr/local/bin/gometalinter"]
-CMD ["--config=gometalinter.json", "./..."]
+CMD ["/usr/local/bin/gometalinter", "--config=gometalinter.json", "./..."]

tasks

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+
+set -eu -o pipefail
+
+dev_image=docker-cli-dev
+linter_image=docker-cli-lint
+cross_image=docker-cli-cross
+mounts="-v $PWD:/go/src/github.com/docker/cli"
+
+if [ -t 1 ] ; then use_tty="-ti"; else use_tty=""; fi
+
+function run_task {
+    local task=$1
+
+    if [[ "$task" = *shell ]]; then
+        local cmd=sh
+    else
+        local cmd="make $task"
+    fi
+
+    case $task in
+        lint|lint-shell)
+            docker build -t "$linter_image" -f ./dockerfiles/Dockerfile.lint .
+            docker run --rm $use_tty $mounts "$linter_image" $cmd
+            ;;
+        cross|dynbinary|cross-shell)
+            docker build -t "$cross_image" -f ./dockerfiles/Dockerfile.cross .
+            docker run --rm $use_tty $mounts "$cross_image" $cmd
+            ;;
+        *)
+            docker build -t "$dev_image" -f ./dockerfiles/Dockerfile.dev .
+            docker run --rm $use_tty $mounts "$dev_image" $cmd
+            ;;
+    esac
+}
+
+function usage {
+    cat <<USAGE
+Usage: $0 TASK [TASK...]
+
+Run a project task in the appropriate Docker image.
+
+TASK may be the name of a target in the Makefile or one of:
+shell, lint-shell, cross-shell
+USAGE
+    exit 1
+}
+
+if [ -z "$@" ] || [ "$@" = "--help" ]; then usage; fi
+
+for task in $@; do
+    run_task $task
+done