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# SPDX-FileCopyrightText: 2021 René de Hesselle <dehesselle@web.de>
#
# SPDX-License-Identifier: GPL-2.0-or-later
### description ################################################################
# Provide an include guard to be used in every script to protect them from
# being sourced multiple times.
### shellcheck #################################################################
# shellcheck shell=bash # no shebang as this file is intended to be sourced
### dependencies ###############################################################
# All of these need to be "or true" because they fail on the first run.
bash_d_include echo 2>/dev/null || true
bash_d_include assert 2>/dev/null || true
### variables ##################################################################
BASH_D_DIR=${BASH_D_DIR:-$(dirname "${BASH_SOURCE[0]}")}
if [ "$BASH_D_FAIL_ON_INCLUDE_ERROR" != "false" ]; then
BASH_D_FAIL_ON_INCLUDE_ERROR=true
fi
### functions ##################################################################
function bash_d_include_all
{
local includes
includes=$(mktemp "$TMP/${FUNCNAME[0]}".XXXXXX)
echo "BASH_D_FAIL_ON_INCLUDE_ERROR=false" >> "$includes"
for file in "$BASH_D_DIR"/*.sh; do
echo "bash_d_include $(basename "$file")" >> "$includes"
done
echo "BASH_D_FAIL_ON_INCLUDE_ERROR=true" >> "$includes"
# shellcheck disable=SC1090 # dynamic sourcing on purpose
source "$includes"
rm "$includes"
}
function bash_d_is_included
{
local file=$1
#shellcheck disable=SC2076 # we want literal match, not regex
if [[ " ${BASH_D_INCLUDE_FILES[*]} " =~ \
" $BASH_D_DIR/$(basename -s .sh "$file").sh " ]]; then
return 0
else
return 1
fi
}
### aliases ####################################################################
# shellcheck disable=SC2142 # too much trickery for shellcheck to digest
alias bash_d_include=\
'declare -a BASH_D_INCLUDE_FILES; '\
'BASH_D_INCLUDE_FILE=$(sed -n ${LINENO}p ${BASH_SOURCE[0]} | awk '"'"'{ print $2 }'"'"'); '\
'BASH_D_INCLUDE_FILE=$BASH_D_DIR/$(basename -s .sh $BASH_D_INCLUDE_FILE).sh; '\
'if [[ " ${BASH_D_INCLUDE_FILES[@]} " =~ " ${BASH_D_INCLUDE_FILE} " ]]; then '\
' : ; '\
'else '\
' if [ "$BASH_D_INCLUDE_FILE" = "$BASH_D_DIR/bash_d.sh" ] && '\
' [ ${#BASH_D_INCLUDE_FILES[@]} -gt 0 ] || '\
' source $BASH_D_INCLUDE_FILE; then '\
' BASH_D_INCLUDE_FILE=$(sed -n ${LINENO}p ${BASH_SOURCE[0]} | awk '"'"'{ print $2 }'"'"'); '\
' BASH_D_INCLUDE_FILE=$BASH_D_DIR/$(basename -s .sh $BASH_D_INCLUDE_FILE).sh; '\
' BASH_D_INCLUDE_FILES+=("$BASH_D_INCLUDE_FILE"); '\
' else '\
' if alias | grep "echo_e" >/dev/null; then '\
' echo_e "$BASH_D_INCLUDE_FILE will be unavailable"; '\
' else '\
' >&2 echo "error: $BASH_D_INCLUDE_FILE will be unavailable"; '\
' fi; '\
' if [ "$BASH_D_INCLUDE_FILE" != "$BASH_D_DIR/bash_d.sh" ] && $BASH_D_FAIL_ON_INCLUDE_ERROR; then '\
' exit 1; '\
' fi '\
' fi '\
'fi '\
'# '
### main #######################################################################
if [ ! -d "$BASH_D_DIR" ]; then
echo "error: BASH_D_DIR=$BASH_D_DIR is invalid [${BASH_SOURCE[0]}]"
exit 1
fi
shopt -s expand_aliases
bash_d_include bash_d # Need to rerun so complete setting us up.
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