#!/bin/bash

set -o errexit; shopt -s expand_aliases

# run scripts: a bash-based replacement for make

# unlike make, supports full bash functionality including multiline commands

# usage: path/to/dir/run cmd args

if false; then #### run script template:

#!/bin/bash

set -o errexit

. "$(dirname "${BASH_SOURCE[0]}")"/path/to/util.run or file_including_util.run

. "$(dirname "${BASH_SOURCE[0]}")"/other_includes

cmd ()

{

	echo_func "$FUNCNAME" "$@"

	"$(dirname "${BASH_SOURCE[0]}")"/path_relative_to_self

	"$(dirname "${BASH_SOURCE[1]}")"/path_relative_to_caller

	"$top_dir"/path_relative_to_outermost_script

}

fi ####

echo_cmd () { echo "$PS4$*" >&2; }

echo_run () { echo_cmd "$@"; "$@"; }

# usage: echo_func "$FUNCNAME" "$@"

echo_func () { echo_cmd "${BASH_SOURCE[1]}" "$@"; }

echo_stdin () { tee -a /dev/stderr; } # usage: input|echo_stdin|cmd

usage () { echo "Usage: $1" >&2; (exit 2); }

top_dir="$(dirname "$0")" # outermost script

run_cmd ()

{

	set -- "${BASH_ARGV[@]}"

	test "$#" -ge 1 || usage "$0 cmd args" || return

	echo_cmd "$0" "$@"; "$@"

}

trap run_cmd EXIT

fwd () # usage: subdirs=(...); fwd "$FUNCNAME" "$@"

{

	echo_func "$FUNCNAME" "$@"

	: "${subdirs?}"

	for subdir in "${subdirs[@]}"; do

		"$(dirname "${BASH_SOURCE[1]}")"/"$subdir"/run "$@"

	done

}

make ()

{

	echo_func "$FUNCNAME" "$@"

	echo_run env make --directory="$top_dir" "$@"

}

if false; then ## usage:

inline_make <<'EOF'

target:

	$(self_dir)/cmd >$@

EOF

# target will be run automatically because it's first in the makefile

fi ##

inline_make ()

{

	echo_func "$FUNCNAME" "$@"

	(cat

	cat <<EOF

.SUFFIXES: # turn off built-in suffix rules

.SECONDARY: # don't automatically delete intermediate files

.DELETE_ON_ERROR: # delete target if recipe fails

EOF

	)|echo_stdin|make --makefile=/dev/stdin \

self_dir="$(dirname "$(readlink -f "${BASH_SOURCE[1]}")")" "$@"

}