Merge pull request #4292 from cpuguy83/4291_make_rm_default_for_build

make docker build -rm=true default

Makefile

@@ -32,10 +32,10 @@ shell: build
 	$(DOCKER_RUN_DOCKER) bash
 
 build: bundles
-	docker build -rm -t "$(DOCKER_IMAGE)" .
+	docker build -t "$(DOCKER_IMAGE)" .
 
 docs-build:
-	docker build -rm -t "$(DOCKER_DOCS_IMAGE)" docs
+	docker build -t "$(DOCKER_DOCS_IMAGE)" docs
 
 bundles:
 	mkdir bundles

api/client.go

@@ -138,7 +138,7 @@ func (cli *DockerCli) CmdBuild(args ...string) error {
 	tag := cmd.String([]string{"t", "-tag"}, "", "Repository name (and optionally a tag) to be applied to the resulting image in case of success")
 	suppressOutput := cmd.Bool([]string{"q", "-quiet"}, false, "Suppress the verbose output generated by the containers")
 	noCache := cmd.Bool([]string{"#no-cache", "-no-cache"}, false, "Do not use cache when building the image")
-	rm := cmd.Bool([]string{"#rm", "-rm"}, false, "Remove intermediate containers after a successful build")
+	rm := cmd.Bool([]string{"#rm", "-rm"}, true, "Remove intermediate containers after a successful build")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}

docs/sources/reference/commandline/cli.rst

@@ -185,11 +185,11 @@ Examples:
 
     Usage: docker build [OPTIONS] PATH | URL | -
     Build a new container image from the source code at PATH
-      -t, --time="": Repository name (and optionally a tag) to be applied 
+      -t, --time="": Repository name (and optionally a tag) to be applied
              to the resulting image in case of success.
       -q, --quiet=false: Suppress the verbose output generated by the containers.
       --no-cache: Do not use the cache when building the image.
-      --rm: Remove intermediate containers after a successful build
+      --rm=true: Remove intermediate containers after a successful build
 
 The files at ``PATH`` or ``URL`` are called the "context" of the build. The
 build process may refer to any of the files in the context, for example when
@@ -198,8 +198,6 @@ is given as ``URL``, then no context is set.  When a Git repository is set as
 ``URL``, then the repository is used as the context. Git repositories are
 cloned with their submodules (`git clone --recursive`).
 
-.. note:: ``docker build --rm`` does not affect the image cache which is used to accelerate builds, it only removes the duplicate writeable container layers.
-
 .. _cli_build_examples:
 
 .. seealso:: :ref:`dockerbuilder`.
@@ -209,7 +207,7 @@ Examples:
 
 .. code-block:: bash
 
-    $ sudo docker build --rm .
+    $ sudo docker build .
     Uploading context 10240 bytes
     Step 1 : FROM busybox
     Pulling repository busybox
@@ -249,9 +247,8 @@ The transfer of context from the local machine to the Docker daemon is
 what the ``docker`` client means when you see the "Uploading context"
 message.
 
-The ``--rm`` option tells Docker to remove the intermediate containers and 
-layers that were used to create each image layer. Doing so has no impact on
-the image build cache.
+If you wish to keep the intermediate containers after the build is complete,
+you must use ``--rm=false``. This does not affect the build cache.
 
 
 .. code-block:: bash