dockcross/imagefiles/dockcross
2019-03-07 08:57:23 -08:00

256 lines
5.7 KiB
Bash
Executable File

#!/usr/bin/env bash
DEFAULT_DOCKCROSS_IMAGE=dockcross/base # DO NOT MOVE THIS LINE (see entrypoint.sh)
#------------------------------------------------------------------------------
# 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 --rm $FINAL_IMAGE ) $0; then
echo $0 is up to date
else
echo -n Updating $0 '... '
docker run --rm $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
#
special_update_command=''
while [[ $# != 0 ]]; do
case $1 in
--)
shift
break
;;
--args|-a)
ARG_ARGS="$2"
shift 2
;;
--config|-c)
ARG_CONFIG="$2"
shift 2
;;
--image|-i)
ARG_IMAGE="$2"
shift 2
;;
update|update-image|update-script)
special_update_command=$1
break
;;
-*)
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-$DEFAULT_DOCKCROSS_IMAGE}}
# Handle special update command
if [ "$special_update_command" != "" ]; then
case $special_update_command in
update)
command:update
exit $?
;;
update-image)
command:update-image
exit $?
;;
update-script)
command:update-script
exit $?
;;
esac
fi
# Set the docker run extra args (if any)
FINAL_ARGS=${ARG_ARGS-${DOCKCROSS_ARGS}}
# Bash on Ubuntu on Windows
UBUNTU_ON_WINDOWS=$([ -e /proc/version ] && grep -l Microsoft /proc/version || echo "")
# MSYS, Git Bash, etc.
MSYS=$([ -e /proc/version ] && grep -l MINGW /proc/version || echo "")
if [ -z "$UBUNTU_ON_WINDOWS" -a -z "$MSYS" ]; then
USER_IDS=(-e BUILDER_UID="$( id -u )" -e BUILDER_GID="$( id -g )" -e BUILDER_USER="$( id -un )" -e BUILDER_GROUP="$( id -gn )")
fi
# Change the PWD when working in Docker on Windows
if [ -n "$UBUNTU_ON_WINDOWS" ]; then
WSL_ROOT="/mnt/"
CFG_FILE=/etc/wsl.conf
if [ -f "$CFG_FILE" ]; then
CFG_CONTENT=$(cat $CFG_FILE | sed -r '/[^=]+=[^=]+/!d' | sed -r 's/\s+=\s/=/g')
eval "$CFG_CONTENT"
if [ -n "$root" ]; then
WSL_ROOT=$root
fi
fi
HOST_PWD=`pwd -P`
HOST_PWD=${HOST_PWD/$WSL_ROOT//}
elif [ -n "$MSYS" ]; then
HOST_PWD=$PWD
HOST_PWD=${HOST_PWD/\//}
HOST_PWD=${HOST_PWD/\//:\/}
else
HOST_PWD=$PWD
fi
# Mount Additional Volumes
if [ -z "$SSH_DIR" ]; then
SSH_DIR="$HOME/.ssh"
fi
HOST_VOLUMES=
if [ -e "$SSH_DIR" -a -z "$MSYS" ]; then
HOST_VOLUMES+="-v $SSH_DIR:/home/$(id -un)/.ssh"
fi
#------------------------------------------------------------------------------
# Now, finally, run the command in a container
#
TTY_ARGS=
tty -s && [ -z "$MSYS" ] && TTY_ARGS=-ti
CONTAINER_NAME=dockcross_$RANDOM
docker run $TTY_ARGS --name $CONTAINER_NAME \
-v "$HOST_PWD":/work \
$HOST_VOLUMES \
"${USER_IDS[@]}" \
$FINAL_ARGS \
$FINAL_IMAGE "$@"
run_exit_code=$?
# Attempt to delete container
rm_output=$(docker rm -f $CONTAINER_NAME 2>&1)
rm_exit_code=$?
if [[ $rm_exit_code != 0 ]]; then
if [[ "$CIRCLECI" == "true" ]] && [[ $rm_output == *"Driver btrfs failed to remove"* ]]; then
: # Ignore error because of https://circleci.com/docs/docker-btrfs-error/
else
echo "$rm_output"
exit $rm_exit_code
fi
fi
exit $run_exit_code
################################################################################
#
# This image is not intended to be run manually.
#
# To create a dockcross helper script for the
# dockcross/linux-armv7 image, run:
#
# docker run --rm dockcross/linux-armv7 > dockcross-linux-armv7
# chmod +x dockcross-linux-armv7
#
# You may then wish to move the dockcross script to your PATH.
#
################################################################################