#!/usr/bin/env bash
#
# fls2dd:
#     Read *.fls file, output *.d file (simple makefile with var definition).
# call: fls2dd <flsfile> <stem> <var-name> <comment-in-makefile>
# E.g.: fls2dd foo.fls foo foo_derived OUTPUT "derived files from foo.fls."
# E.g.: fls2dd foo.fls foo foo_deps INPUT "dependency files from foo.fls."
fls2dd ()
{
  echo -e "# $5"
  echo define $3
  
  grep -v $2 $1 | # read foo.fls; filter out lines with foo* (e.g., foo.aux,foo.log)
    grep -v "^$4 /" | # filter out lines with absolute path, e.g. /usr/local/...
    grep -v ".log" | # remove unicode.log, etc
    awk "/$4/ { print \" \" \$2 \"\\\\\" }" | # print (INPUT|OUTPUT) entries only
    sort --unique
  
  echo -e "\nendef "

}

# fls2dd_lg:
#     Process *.lg file; output sed script
# call: fls2dd_lg
# E.g.: fls2dd_lg foo.lg
fls2dd_lg ()
{
    grep 'needs' $1 |
        grep -v 'tmp;' |
        grep -v "mkdir"|
         awk '/--- needs ---/ { str = $8; gsub("\"", "", str); print "s!" $7 "!" str "!" }'  
}

# fls2dd_fls:
#     Process *.fls file. 
# call: fls2dd_fls
# E.g.: fls2dd_fls foo.fls foo foo_deps OUTPUT "dependency files from foo.fls." temp.sed
fls2dd_fls ()
{
    echo -e "# $5"
    echo define $3

    grep -v $2 $1 |
        grep -v ".log" | # remove unicode.log, etc
        sed -f $6 |
        awk '/OUTPUT/ { print "  " $2 "\\" }' # always OUTPUT

    echo -e "\nendef "
}

# fls2dd_fls:
#      Process *.lg and *.fls files; output *.d (derived part)
# call: flslg2dd
# E.g.: flslg2dd foo.lg foo.fls foo foo_deps OUTPUT "dependency files from foo.fls."
flslg2dd ()
{
  fls2dd_lg $1 > temp.sed
  fls2dd_fls $2 $3 $4 $5 "$6" temp.sed
  rm -f temp.sed
}