dockcross/imagefiles/dockcross.sh

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#!/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
}
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# If OCI_EXE is not already set, search for a container executor (OCI stands for "Open Container Initiative")
if [ -z "$OCI_EXE" ]; then
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if which podman >/dev/null 2>/dev/null; then
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OCI_EXE=podman
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elif which docker >/dev/null 2>/dev/null; then
OCI_EXE=docker
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else
die "Cannot find a container executor. Search for docker and podman."
fi
fi
#------------------------------------------------------------------------------
# Command handlers
#
command:update-image() {
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$OCI_EXE pull $FINAL_IMAGE
}
help:update-image() {
echo "Pull the latest $FINAL_IMAGE ."
}
command:update-script() {
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if cmp -s <( $OCI_EXE run --rm $FINAL_IMAGE ) $0; then
echo "$0 is up to date"
else
echo -n "Updating $0 ... "
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$OCI_EXE run --rm $FINAL_IMAGE > $0 && echo ok
fi
}
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help:update-script() {
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
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Usage: dockcross [options] [--] command [args]
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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
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For update command help use: $0 help <command>
ENDHELP
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exit 1
fi
}
#------------------------------------------------------------------------------
# Option processing
#
special_update_command=''
while [[ $# != 0 ]]; do
case $1 in
--)
shift
break
;;
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--args|-a)
ARG_ARGS="$2"
shift 2
;;
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--config|-c)
ARG_CONFIG="$2"
shift 2
;;
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--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=$([ -e /proc/version ] && grep -l MINGW /proc/version || echo "")
# CYGWIN
CYGWIN=$([ -e /proc/version ] && grep -l CYGWIN /proc/version || echo "")
if [ -z "$UBUNTU_ON_WINDOWS" -a -z "$MSYS" -a "$OCI_EXE" != "podman" ]; then
USER_IDS=(-e BUILDER_UID="$( 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/\//:\/}
elif [ -n "$CYGWIN" ]; then
for f in pwd readlink cygpath ; do
test -n "$(type "${f}" )" || { echo >&2 "Missing functionality (${f}) (in cygwin)." ; exit 1 ; } ;
done ;
HOST_PWD="$( cygpath -w "$( readlink -f "$( pwd ;)" ; )" ; )" ;
else
HOST_PWD=$PWD
[ -L $HOST_PWD ] && HOST_PWD=$(readlink $HOST_PWD)
fi
# Mount Additional Volumes
if [ -z "$SSH_DIR" ]; then
SSH_DIR="$HOME/.ssh"
fi
HOST_VOLUMES=
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if [ -e "$SSH_DIR" -a -z "$MSYS" ]; then
if test -n "${CYGWIN}" ; then
HOST_VOLUMES+="-v $(cygpath -w ${SSH_DIR} ; ):/home/$(id -un)/.ssh" ;
else
HOST_VOLUMES+="-v $SSH_DIR:/home/$(id -un)/.ssh" ;
fi ;
fi
#------------------------------------------------------------------------------
# Now, finally, run the command in a container
#
TTY_ARGS=
tty -s && [ -z "$MSYS" ] && TTY_ARGS=-ti
CONTAINER_NAME=dockcross_$RANDOM
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$OCI_EXE run $TTY_ARGS --name $CONTAINER_NAME \
-v "$HOST_PWD":/work \
$HOST_VOLUMES \
"${USER_IDS[@]}" \
$FINAL_ARGS \
$FINAL_IMAGE "$@"
run_exit_code=$?
# Attempt to delete container
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rm_output=$($OCI_EXE 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.
#
################################################################################