dockcross
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#!/bin/bash
DEFAULT_DOCKCROSS_IMAGE=thewtex/cross-compiler-linux-armv6
#------------------------------------------------------------------------------
# Helpers
#
err() {
echo -e >&2 ERROR: $@\\n
}
die() {
err $@
exit 1
}
has() {
# eg. has command update
local kind=$1
local name=$2
type -t $kind:$name | grep -q function
}
#------------------------------------------------------------------------------
# Command handlers
#
command:update-image() {
docker pull $FINAL_IMAGE
}
help:update-image() {
echo Pull the latest $FINAL_IMAGE .
}
command:update-script() {
if cmp -s <( docker run $FINAL_IMAGE ) $0; then
echo $0 is up to date
else
echo -n Updating $0 '... '
docker run $FINAL_IMAGE > $0 && echo ok
fi
}
help:update-image() {
echo Update $0 from $FINAL_IMAGE .
}
command:update() {
command:update-image
command:update-script
}
help:update() {
echo Pull the latest $FINAL_IMAGE, and then update $0 from that.
}
command:help() {
if [[ $# != 0 ]]; then
if ! has command $1; then
err \"$1\" is not an dockcross command
command:help
elif ! has help $1; then
err No help found for \"$1\"
else
help:$1
fi
else
cat >&2 <<ENDHELP
Usage: dockcross [options] [--] command [args]
By default, run the given *command* in an dockcross Docker container.
The *options* can be one of:
--args|-a Extra args to the *docker run* command
--image|-i Docker cross-compiler image to use
--config|-c Bash script to source before running this script
Additionally, there are special update commands:
update-image
update-script
update
For update command help use: $0 help <command>
ENDHELP
exit 1
fi
}
#------------------------------------------------------------------------------
# Option processing
#
while [[ $# != 0 ]]; do
case $1 in
--)
break
;;
--args|-a)
ARG_ARGS="$2"
shift 2
;;
--config|-c)
ARG_CONFIG="$2"
shift 2
;;
--image|-i)
ARG_IMAGE="$2"
shift 2
;;
-*)
err Unknown option \"$1\"
command:help
exit
;;
*)
break
;;
esac
done
# The precedence for options is:
# 1. command-line arguments
# 2. environment variables
# 3. defaults
# Source the config file if it exists
DEFAULT_DOCKCROSS_CONFIG=~/.dockcross
FINAL_CONFIG=${ARG_CONFIG-${DOCKCROSS_CONFIG-$DEFAULT_DOCKCROSS_CONFIG}}
[[ -f "$FINAL_CONFIG" ]] && source "$FINAL_CONFIG"
# Set the docker image
FINAL_IMAGE=${ARG_IMAGE-${DOCKCROSS_IMAGE-$DEFAULT_DOCKCROSS_IMAGE}}
# Set the docker run extra args (if any)
FINAL_ARGS=${ARG_ARGS-${DOCKCROSS_ARGS}}
# If we are not running via boot2docker
if [ -z $DOCKER_HOST ]; then
USER_IDS="-e BUILDER_UID=$( id -u ) -e BUILDER_GID=$( id -g ) -e BUILDER_USER=$( id -un ) -e BUILDER_GROUP=$( id -gn )"
fi
#------------------------------------------------------------------------------
# Now, finally, run the command in a container
#
docker run -i -t --rm \
-v $PWD:/build \
$USER_IDS \
$FINAL_ARGS \
$FINAL_IMAGE "$@"
################################################################################
#
# This image is not intended to be run manually.
#
# To create a dockcross helper script for the
# thewtex/cross-compiler-linux-armv7 image, run:
#
# docker run --rm thewtex/cross-compiler-linux-armv7 > dockcross-linux-armv7
# chmod +x dockcross-linux-armv7
#
# You may then wish to move the dockcross script to your PATH.
#
################################################################################