Adjust Dockerfile style to be more consistent

Signed-off-by: Andrew "Tianon" Page <admwiggin@gmail.com>

Dockerfile

@@ -23,11 +23,11 @@
 # the case. Therefore, you don't have to disable it anymore.
 #
 
-FROM	ubuntu:14.04
+FROM ubuntu:14.04
-MAINTAINER	Tianon Gravi <admwiggin@gmail.com> (@tianon)
+MAINTAINER Tianon Gravi <admwiggin@gmail.com> (@tianon)
 
 # Packaged dependencies
-RUN	apt-get update && apt-get install -y \
+RUN apt-get update && apt-get install -y \
 	aufs-tools \
 	automake \
 	btrfs-tools \
@@ -52,72 +52,86 @@ RUN	apt-get update && apt-get install -y \
 	--no-install-recommends
 
 # Get lvm2 source for compiling statically
-RUN	git clone --no-checkout https://git.fedorahosted.org/git/lvm2.git /usr/local/lvm2 && cd /usr/local/lvm2 && git checkout -q v2_02_103
+RUN git clone -b v2_02_103 https://git.fedorahosted.org/git/lvm2.git /usr/local/lvm2
 # see https://git.fedorahosted.org/cgit/lvm2.git/refs/tags for release tags
-# note: we don't use "git clone -b" above because it then spews big nasty warnings about 'detached HEAD' state that we can't silence as easily as we can silence them using "git checkout" directly
 
 # Compile and install lvm2
-RUN	cd /usr/local/lvm2 && ./configure --enable-static_link && make device-mapper && make install_device-mapper
+RUN cd /usr/local/lvm2 \
+	&& ./configure --enable-static_link \
+	&& make device-mapper \
+	&& make install_device-mapper
 # see https://git.fedorahosted.org/cgit/lvm2.git/tree/INSTALL
 
 # Install Go
-RUN	curl -sSL https://golang.org/dl/go1.4.src.tar.gz | tar -v -C /usr/local -xz
+RUN curl -sSL https://golang.org/dl/go1.4.src.tar.gz | tar -v -C /usr/local -xz
-ENV	PATH	/usr/local/go/bin:$PATH
+ENV PATH /usr/local/go/bin:$PATH
-ENV	GOPATH	/go:/go/src/github.com/docker/docker/vendor
+ENV GOPATH /go:/go/src/github.com/docker/docker/vendor
 ENV PATH /go/bin:$PATH
-RUN	cd /usr/local/go/src && ./make.bash --no-clean 2>&1
+RUN cd /usr/local/go/src && ./make.bash --no-clean 2>&1
 
 # Compile Go for cross compilation
-ENV	DOCKER_CROSSPLATFORMS	\
+ENV DOCKER_CROSSPLATFORMS \
 	linux/386 linux/arm \
 	darwin/amd64 darwin/386 \
 	freebsd/amd64 freebsd/386 freebsd/arm \
 	windows/amd64 windows/386
 
 # (set an explicit GOARM of 5 for maximum compatibility)
-ENV	GOARM	5
+ENV GOARM 5
-RUN	cd /usr/local/go/src && bash -xc 'for platform in $DOCKER_CROSSPLATFORMS; do GOOS=${platform%/*} GOARCH=${platform##*/} ./make.bash --no-clean 2>&1; done'
+RUN cd /usr/local/go/src \
+	&& set -x \
+	&& for platform in $DOCKER_CROSSPLATFORMS; do \
+		GOOS=${platform%/*} \
+		GOARCH=${platform##*/} \
+			./make.bash --no-clean 2>&1; \
+	done
 
 # reinstall standard library with netgo
 RUN go clean -i net && go install -tags netgo std
 
 # Grab Go's cover tool for dead-simple code coverage testing
-RUN	go get golang.org/x/tools/cmd/cover
+RUN go get golang.org/x/tools/cmd/cover
 
 # TODO replace FPM with some very minimal debhelper stuff
-RUN	gem install --no-rdoc --no-ri fpm --version 1.3.2
+RUN gem install --no-rdoc --no-ri fpm --version 1.3.2
-
-# Install man page generator
-RUN mkdir -p /go/src/github.com/cpuguy83 \
-    && git clone -b v1 https://github.com/cpuguy83/go-md2man.git /go/src/github.com/cpuguy83/go-md2man \
-    && cd /go/src/github.com/cpuguy83/go-md2man \
-    && go get -v ./...
 
 # Get the "busybox" image source so we can build locally instead of pulling
-RUN	git clone -b buildroot-2014.02 https://github.com/jpetazzo/docker-busybox.git /docker-busybox
+RUN git clone -b buildroot-2014.02 https://github.com/jpetazzo/docker-busybox.git /docker-busybox
 
 # Get the "cirros" image source so we can import it instead of fetching it during tests
-RUN	curl -sSL -o /cirros.tar.gz https://github.com/ewindisch/docker-cirros/raw/1cded459668e8b9dbf4ef976c94c05add9bbd8e9/cirros-0.3.0-x86_64-lxc.tar.gz
+RUN curl -sSL -o /cirros.tar.gz https://github.com/ewindisch/docker-cirros/raw/1cded459668e8b9dbf4ef976c94c05add9bbd8e9/cirros-0.3.0-x86_64-lxc.tar.gz
 
 # Get the "docker-py" source so we can run their integration tests
-RUN	git clone -b 0.7.0 https://github.com/docker/docker-py.git /docker-py
+RUN git clone -b 0.7.0 https://github.com/docker/docker-py.git /docker-py
 
 # Setup s3cmd config
-RUN	/bin/echo -e '[default]\naccess_key=$AWS_ACCESS_KEY\nsecret_key=$AWS_SECRET_KEY' > $HOME/.s3cfg
+RUN { \
+		echo '[default]'; \
+		echo 'access_key=$AWS_ACCESS_KEY'; \
+		echo 'secret_key=$AWS_SECRET_KEY'; \
+	} > ~/.s3cfg
 
 # Set user.email so crosbymichael's in-container merge commits go smoothly
-RUN	git config --global user.email 'docker-dummy@example.com'
+RUN git config --global user.email 'docker-dummy@example.com'
 
 # Add an unprivileged user to be used for tests which need it
 RUN groupadd -r docker
 RUN useradd --create-home --gid docker unprivilegeduser
 
-VOLUME	/var/lib/docker
+VOLUME /var/lib/docker
-WORKDIR	/go/src/github.com/docker/docker
+WORKDIR /go/src/github.com/docker/docker
-ENV	DOCKER_BUILDTAGS	apparmor selinux btrfs_noversion
+ENV DOCKER_BUILDTAGS apparmor selinux btrfs_noversion
+
+# Install man page generator
+COPY vendor /go/src/github.com/docker/docker/vendor
+# (copy vendor/ because go-md2man needs golang.org/x/net)
+RUN set -x \
+	&& git clone -b v1 https://github.com/cpuguy83/go-md2man.git /go/src/github.com/cpuguy83/go-md2man \
+	&& git clone -b v1.2 https://github.com/russross/blackfriday.git /go/src/github.com/russross/blackfriday \
+	&& go install -v github.com/cpuguy83/go-md2man
 
 # Wrap all commands in the "docker-in-docker" script to allow nested containers
-ENTRYPOINT	["hack/dind"]
+ENTRYPOINT ["hack/dind"]
 
 # Upload docker source
-COPY	.	/go/src/github.com/docker/docker
+COPY . /go/src/github.com/docker/docker