#!/bin/bash
# $1 file to bundle
# $2 bundled output file (optional)
# if no output file then the bundled source is returned
# it can be immediately invoked like this
# source <(bundle myscript.sh) 
# or
# scpt=$(bundle myscript.sh)
# source <(echo -e "$scpt")

bundle () {

local file

if [[ $1 == "-m" ]]; then 
 shift 1
 file=$(module_find $1)
 else
 file=$1
fi 

[[ ! -f $file ]] && return 1
module_load file 

if [[ ! $2 == "__recurse__" ]]; then
tmp_file=$( mktemp -t TEMP_FILE_bundle.XXXXXXXX )
chmod 600 "$tmp_file"
\cp $file $tmp_file
else 
tmp_file=$file
fi
# echo current temp file: $tmp_file
modules=$(sed -n -e 's/^module_load //p' < $tmp_file)
# echo found: $modules
# return
if [[ $modules ]]; then
    # echo Modules: $modules
    sed -i '/module_load/d' $tmp_file
    for module in $(printf '%s\n' "${modules[@]}"|tac);
    do 
        # echo module: $module  
        # echo module path: $(module_find $module) 
        prepend_file $(module_find $module) $tmp_file
    done
    bundle $tmp_file __recurse__
fi
 
if [[ ! $2 == "__recurse__" ]]; then
    if [[ $2 ]]; then
        \cp $tmp_file $2 
        # echo $2
        else 
        echo -e "$(cat $tmp_file)"
    fi
    rm -f $tmp_file; 
    return 0
 fi
}

# # if script was executed then call the function
(return 0 2>/dev/null) || bundle $@