Adds a dockerfile and script for building a tar archive containing protoc and the grpc plugins
diff --git a/tools/dockerfile/grpc_dist_proto/Dockerfile b/tools/dockerfile/grpc_dist_proto/Dockerfile
new file mode 100644
index 0000000..a15b7ca
--- /dev/null
+++ b/tools/dockerfile/grpc_dist_proto/Dockerfile
@@ -0,0 +1,73 @@
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Dockerfile to build protoc and plugins for inclusion in a release.
+FROM grpc/base
+
+# Install tools needed for building protoc.
+RUN apt-get update && apt-get -y install libgflags-dev libgtest-dev
+
+# Get the protobuf source from GitHub.
+RUN mkdir -p /var/local/git
+RUN git clone https://github.com/google/protobuf.git /var/local/git/protobuf
+
+# Build the protobuf library statically and install to /tmp/protoc_static.
+WORKDIR /var/local/git/protobuf
+RUN ./autogen.sh && \
+    ./configure --disable-shared --prefix=/tmp/protoc_static \
+    LDFLAGS="-lgcc_eh -static-libgcc -static-libstdc++" && \
+    make -j12 && make check && make install
+
+# Build the protobuf library dynamically and install to /usr/local.
+WORKDIR /var/local/git/protobuf
+RUN ./autogen.sh && \
+    ./configure --prefix=/usr/local && \
+    make -j12 && make check && make install
+
+# Build the grpc plugins.
+RUN git clone https://github.com/google/grpc.git /var/local/git/grpc
+WORKDIR /var/local/git/grpc
+RUN LDFLAGS=-static make plugins
+
+# Create an archive containing all the generated binaries.
+RUN mkdir /tmp/proto_bins_root
+RUN cp -v bins/opt/* /tmp/proto_bins_root
+RUN cp -v /tmp/protoc_static/bin/protoc /tmp/proto_bins_root
+RUN cd /tmp/proto_bins_root && \
+    tar -czf /tmp/proto-bins-linux-$(uname -m).tar.gz *
+
+# List the tar contents: provides a way to visually confirm that the contents
+# are correct.
+RUN echo 'proto-bins-linux-tar-$(uname -m) contents:' && \
+    tar -ztf /tmp/proto-bins-linux-$(uname -m).tar.gz
+
+
+
+
+
diff --git a/tools/gce_setup/grpc_docker.sh b/tools/gce_setup/grpc_docker.sh
index 619eff5..44b5b45 100755
--- a/tools/gce_setup/grpc_docker.sh
+++ b/tools/gce_setup/grpc_docker.sh
@@ -663,6 +663,58 @@
   gcloud compute $project_opt ssh $zone_opt $host --command "$cmd"
 }
 
+_grpc_build_proto_bins_args() {
+  [[ -n $1 ]] && {  # host
+    host=$1
+    shift
+  } || {
+    host='grpc-docker-builder'
+  }
+}
+
+# grpc_build_proto_bins
+# 
+# - rebuilds the dist_proto docker image
+#   * doing this builds the protoc and the ruby, python and cpp bins statically
+#
+# - runs a docker command that copies the built protos to the GCE host
+# - copies the built protos to the local machine
+grpc_build_proto_bins() {
+  _grpc_ensure_gcloud_ssh || return 1;
+
+  # declare vars local so that they don't pollute the shell environment
+  # where they this func is used.
+  local grpc_zone grpc_project dry_run  # set by _grpc_set_project_and_zone
+  # set by _grpc_build_proto_bins_args
+  local host
+
+  # set the project zone and check that all necessary args are provided
+  _grpc_set_project_and_zone -f _grpc_build_proto_bins_args "$@" || return 1
+  gce_has_instance $grpc_project $host || return 1;
+  local project_opt="--project $grpc_project"
+  local zone_opt="--zone $grpc_zone"
+  
+  # rebuild the dist_proto image
+  local label='dist_proto'
+  grpc_update_image -- -h $host $label || return 1
+ 
+  # run a command to copy the generated output to the local machine
+  local docker_prefix='sudo docker run -v /tmp:/tmp/proto_bins_out'
+  local tar_name='proto-bins-linux-x86_64.tar.gz'
+  local cp_cmd="cp /tmp/$tar_name /tmp/proto_bins_out"
+  local cmd="$docker_prefix grpc/$label $cp_cmd"
+  local ssh_cmd="bash -l -c \"$cmd\""
+  echo "will run:"
+  echo "  $ssh_cmd"
+  echo "on $host"
+  gcloud compute $project_opt ssh $zone_opt $host --command "$cmd" || return 1
+
+  # copy the tar.gz locally
+  local rmt_tar="$host:/tmp/$tar_name"
+  local local_copy="$(pwd)/$tar_name"
+  gcloud compute copy-files $rmt_tar $local_copy $project_opt $zone_opt || return 1
+}
+
 _grpc_launch_servers_args() {
   [[ -n $1 ]] && {  # host
     host=$1