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#! /usr/bin/env bash
#
# Copyright 2013-2023 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)
mode=oneshot
if [ "$( basename "$0" )" '=' 'spack-env' ] ; then
mode=spackenv
elif [ "$( basename "$0" )" '=' 'docker-shell' ] ; then
mode=dockershell
elif [ "$( basename "$0" )" '=' 'interactive-shell' ] ; then
mode=interactiveshell
elif [ "$1" '=' 'docker-shell' ] ; then
mode=dockershell
shift
elif [ "$1" '=' 'interactive-shell' ] ; then
mode=interactiveshell
shift
fi
case "$mode" in
"spackenv")
# Scenario 1: Run as if the image had no ENTRYPOINT
#
# Necessary for use cases where the command to run and all
# arguments must be accepted in the CMD portion. (e.g.: Gitlab CI
# Runners)
#
# Roughly equivalent to
# docker run ... --entrypoint spack-env ... sh -c "..."
#
# The shell script runs with spack pre-loaded and ready to use.
. $SPACK_ROOT/share/spack/setup-env.sh
unset CURRENTLY_BUILDING_DOCKER_IMAGE
exec "$@"
;;
"dockershell")
# Scenario 2: Accept shell code from a RUN command in a
# Dockerfile
#
# For new Docker images that start FROM this image as its base.
# Prepared so that subsequent RUN commands can take advantage of
# Spack without having to manually (re)initialize.
#
# Example:
# FROM spack/centos7
# COPY spack.yaml .
# RUN spack install # <- Spack is loaded and ready to use.
# # No manual initialization necessary.
. $SPACK_ROOT/share/spack/setup-env.sh
exec bash -c "$*"
;;
"interactiveshell")
# Scenario 3: Run an interactive shell session with Spack
# preloaded.
#
# Create a container meant for an interactive shell session.
# Additional checks are performed to ensure that stdin is a tty
# and additional shell completion files are sourced. The user is
# presented with a shell prompt from which they may issue Spack
# commands.
#
# This is the default behavior when running with no CMD or
# ENTRYPOINT overrides:
# docker run -it spack/centos7
if [ -t 0 ] ; then
. $SPACK_ROOT/share/spack/setup-env.sh
. $SPACK_ROOT/share/spack/spack-completion.bash
unset CURRENTLY_BUILDING_DOCKER_IMAGE
exec bash -i
else
(
echo -n "It looks like you're trying to run an"
echo -n " intractive shell session, but either no"
echo -n " psuedo-TTY is allocated for this container's"
echo " STDIN, or it is closed."
echo
echo -n "Make sure you run docker with the --interactive"
echo -n " and --tty options."
echo
) >&2
exit 1
fi
;;
"oneshot")
# Scenario 4: Run a one-shot Spack command from the host command
# line.
#
# Triggered by providing arguments to `docker run`. Arguments
# are passed along to the container's underlying spack
# installation, allowing users to use the image as if it were
# spack, itself. Pass volume mount information to `docker run`
# to persist the effects of running in this mode.
#
# This is the default behavior when running with a CMD override.
#
# Examples:
# # concretize the same spec on different OSes
# docker run --rm spack/ubuntu-xenial spec zlib
# docker run --rm spack/centos7 spec zlib
#
# # a "wetter" dry-run;
# # install a package and then throw away the results.
# docker run --rm spack/centos7 install libiconv
# docker run --rm spack/centos7 find libiconv
# ==> No package matches the query: libiconv
#
# # use docker volumes to persist changes
# docker run --rm -v ...:/spack spack/centos7 install ...
# docker run --rm -v ...:/spack spack/centos7 install ...
# docker run --rm -v ...:/spack spack/centos7 install ...
exec 3>&1
exec 4>&2
exec 1>&-
exec 2>&-
. $SPACK_ROOT/share/spack/setup-env.sh
unset CURRENTLY_BUILDING_DOCKER_IMAGE
exec 1>&3
exec 2>&4
exec 3>&-
exec 4>&-
spack "$@"
exit $?
;;
*)
echo "INTERNAL ERROR - UNRECOGNIZED MODE: $mode" >&2
exit 1
;;
esac
|
