#!/bin/sh

# pseudo code:
# - find all .c files in libyara/
# - run gcov --preserve-paths <each .c file>
# - fold gcov output into single summary line output
# - remember files not executed, and percentages
# - at end: output grand total percentage
# - at end: output files not executed

cd libyara/
find . -type f | egrep "\.c$" | perl -lane '
  if (-e $_) {
    $cmd = qq[gcov --preserve-paths $_];
    $out = `$cmd 2>&1`;
    $out =~ s~(Creating|[^\n]+cannot open notes) [^\n]+\s+~~gs;
    @out = split(m~\n~, $out);
    foreach(reverse @out) {
      if (m~assuming not executed~) {
        push @assume, $_;
        next;
      }
      if (m~Lines executed:([\d\.]+). of (\d+)~) {
        $loc_tot += $2;
        $loc_exe += ($2 * $1 / 100);
      }
      printf qq[%-32s%s], $_, m~^Lines~ ? q[] : qq[\n];
    }
  }
  sub END {
    if ($loc_tot) {
      printf qq[Lines executed:%.2f%% of %u total lines in all executed code\n\n], $loc_exe / $loc_tot * 100, $loc_tot;
    }
    foreach(@assume) {
      printf qq[%s\n], $_;
    }
  }'

exit 0