containerize script for a Yocto build env

The containerize script fetches down a Docker container and wires up the
current directory inside so that you can use a known good environment
for compiling Yocto that has all the dependencies.

Signed-off-by: Doug Goldstein <cardoe@cardoe.com>

scripts/containerize.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+# what container are we using to build this
+CONTAINER="starlabio/yocto:1.5"
+
+einfo() {
+	echo "$*" >&2
+}
+
+die() {
+    echo "$*" >&2
+    exit 1
+}
+
+# Save the commands for future use
+cmd=$@
+
+# If no command was specified, just drop us into a shell if we're interactive
+[ $# -eq 0 ] && tty -s && cmd="/bin/bash"
+
+# user and group we are running as to ensure files created inside
+# the container retain the same permissions
+my_uid=$(id -u)
+my_gid=$(id -g)
+
+# Are we in an interactive terminal?
+tty -s && termint=t
+
+# Fetch the latest version of the container
+einfo "*** Ensuring local container is up to date"
+docker pull ${CONTAINER} > /dev/null || die "Failed to update docker container"
+
+# Ensure we've got what we need for SSH_AUTH_SOCK
+if [[ -n ${SSH_AUTH_SOCK} ]]; then
+	SSH_AUTH_DIR=$(dirname $(readlink -f ${SSH_AUTH_SOCK}))
+	SSH_AUTH_NAME=$(basename ${SSH_AUTH_SOCK})
+fi
+
+# Kick off Docker
+einfo "*** Launching container ..."
+exec docker run \
+    --privileged \
+    -e BUILD_UID=${my_uid} \
+    -e BUILD_GID=${my_gid} \
+    -e TEMPLATECONF=meta-rust/conf \
+    -e MACHINE=${MACHINE:-qemux86} \
+    ${SSH_AUTH_SOCK:+-e SSH_AUTH_SOCK="/tmp/ssh-agent/${SSH_AUTH_NAME}"} \
+    -v ${HOME}/.ssh:/var/build/.ssh \
+    -v "${PWD}":/var/build:rw \
+    ${SSH_AUTH_SOCK:+-v "${SSH_AUTH_DIR}":/tmp/ssh-agent} \
+    ${EXTRA_CONTAINER_ARGS} \
+    -${termint}i --rm -- \
+    ${CONTAINER} \
+    ${cmd}