Add count_lines back into the repo

utils/count_lines/count_lines

+#! /usr/bin/perl
+#
+%DirCount = ();
+%ModCount = ();
+%DirComments = ();
+%ModComments = ();
+
+foreach $f ( @ARGV ) {
+
+    if ( $f =~ /\.lhs$/ ) {
+        open(INF, "../utils/unlit/unlit $f - |") || die "Couldn't unlit $f!\n";
+    } else {
+        open(INF, "< $f") || die "Couldn't open $f!\n";
+    }
+    $cnt = 0;
+    while (<INF>) {
+        s/--.*//;
+        s/{-.*-}//;
+        next if /^\s*$/;
+        $cnt++;
+    }
+    close(INF);
+
+    $f_wc = `wc $f`; die "wc failed: $f\n" if $? != 0;
+    if ( $f_wc =~ /\s*(\d+)\s*(\d+)\s*(\d+)/ ) {
+        $comments = $1 - $cnt;
+    } else {
+        die "Can't grok wc format: $f_wc";
+    }
+
+    if ( $f =~ /(.*)\/(.*)/ ) {
+        local($dir) = $1;
+        local($mod) = $2;
+        $DirCount{$dir} += $cnt;
+        $ModCount{$mod} += $cnt;
+        $DirComments{$dir} += $comments;
+        $ModComments{$mod} += $comments;
+    } else {
+        print STDERR "not counted in a directory: $f\n";
+        $ModCount{$f} += $cnt;
+        $ModComments{$f} += $comments;
+    }
+}
+
+# print the info
+$tot = 0;
+$totcmts = 0;
+foreach $d (sort (keys %DirCount)) {
+    printf "%-20s %6d %6d\n", $d, $DirCount{$d}, $DirComments{$d};
+    $tot     += $DirCount{$d};
+    $totcmts += $DirComments{$d};
+}
+printf "\n%-20s %6d %6d\n\n\n", 'TOTAL:', $tot, $totcmts;
+
+$tot = 0;
+$totcmts = 0;
+printf "\n                      Code  Comments\n";
+foreach $m (sort (keys %ModCount)) {
+    printf "%-20s %6d %6d\n", $m, $ModCount{$m}, $ModComments{$m};
+    $tot += $ModCount{$m};
+    $totcmts += $ModComments{$m};
+}
+printf "\n%-20s %6d %6d\n", 'TOTAL:', $tot, $totcmts;