#!/bin/sh

for script in /.singularity.d/env/*.sh; do
    if [ -f "$script" ]; then
        . "$script"
    fi
done

# See https://github.com/sylabs/singularity/issues/2721,
# if the runscript execute bash by default, it can give
# a prompt identical to the host one which may confuse users
# so we use PROMPT_COMMAND environment variable which is
# used by bash to execute a command before command prompt
# in order to set PS1 correctly before the first prompt
if test -z "${PROMPT_COMMAND:-}"; then
    export PROMPT_COMMAND="PS1=\"${PS1}\"; unset PROMPT_COMMAND"
else
    export PROMPT_COMMAND="${PROMPT_COMMAND:-}; PROMPT_COMMAND=\"\${PROMPT_COMMAND%%; PROMPT_COMMAND=*}\"; PS1=\"${PS1}\""
fi

if test -n "${SINGULARITY_APPNAME:-}"; then

    if test -x "/scif/apps/${SINGULARITY_APPNAME:-}/scif/runscript"; then
        exec "/scif/apps/${SINGULARITY_APPNAME:-}/scif/runscript" "$@"
    else
        echo "No runscript for contained app: ${SINGULARITY_APPNAME:-}"
        exit 1
    fi

elif test -x "/.singularity.d/runscript"; then
    exec "/.singularity.d/runscript" "$@"
else
    echo "No runscript found in container, executing /bin/sh"
    exec /bin/sh "$@"
fi