scripts/documentation-file-ref-check: get rid of false-positives

Now that the number of broken refs are smaller, improve the logic
that gets rid of false-positives.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>

diff --git a/scripts/documentation-file-ref-check b/scripts/documentation-file-ref-check
index d132f756d31d450c885e5ce08b130b65669f1145..047f463cdf4be8833d88e80081bdc8badbac05d1 100755 (executable)
--- a/scripts/documentation-file-ref-check
+++ b/scripts/documentation-file-ref-check
@@ -38,16 +38,31 @@ while (<IN>) {
        my $f = $1;
        my $ln = $2;
 
-       # Makefiles contain nasty expressions to parse docs
-       next if ($f =~ m/Makefile/);
+       # Makefiles and scripts contain nasty expressions to parse docs
+       next if ($f =~ m/Makefile/ || $f =~ m/\.sh$/);
+
        # Skip this script
        next if ($f eq $scriptname);
 
-       if ($ln =~ m,\b(\S*)(Documentation/[A-Za-z0-9\_\.\,\~/\*\[\]\?+-]*),) {
+       if ($ln =~ m,\b(\S*)(Documentation/[A-Za-z0-9\_\.\,\~/\*\[\]\?+-]*)(.*),) {
                my $prefix = $1;
                my $ref = $2;
                my $base = $2;
+               my $extra = $3;
+
+               # some file references are like:
+               # /usr/src/linux/Documentation/DMA-{API,mapping}.txt
+               # For now, ignore them
+               next if ($extra =~ m/^{/);
+
+               # Remove footnotes at the end like:
+               # Documentation/devicetree/dt-object-internal.txt[1]
+               $ref =~ s/(txt|rst)\[\d+]$/$1/;
+
+               # Remove ending ']' without any '['
+               $ref =~ s/\].*// if (!($ref =~ m/\[/));
 
+               # Remove puntuation marks at the end
                $ref =~ s/[\,\.]+$//;
 
                my $fulref = "$prefix$ref";