scripts: kernel-doc: replace tabs by spaces

Sphinx has a hard time dealing with tabs, causing it to
misinterpret paragraph continuation.

As we're now mainly focused on supporting ReST output,
replace tabs by spaces, in order to avoid troubles when
the output is parsed by Sphinx.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index e417d93575b9afb4a671319f6c86fed236fe5ddd..05aadac0612a6d51a0d829f24549654b2879b725 100755 (executable)
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -1579,7 +1579,7 @@ sub tracepoint_munge($) {
 sub syscall_munge() {
        my $void = 0;
 
-       $prototype =~ s@[\r\n\t]+@ @gos; # strip newlines/CR's/tabs
+       $prototype =~ s@[\r\n]+@ @gos; # strip newlines/CR's
 ##     if ($prototype =~ m/SYSCALL_DEFINE0\s*\(\s*(a-zA-Z0-9_)*\s*\)/) {
        if ($prototype =~ m/SYSCALL_DEFINE0/) {
                $void = 1;
@@ -1778,6 +1778,8 @@ sub process_file($) {
        while (s/\\\s*$//) {
            $_ .= <IN>;
        }
+       # Replace tabs by spaces
+        while ($_ =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {};
        if ($state == STATE_NORMAL) {
            if (/$doc_start/o) {
                $state = STATE_NAME;    # next line is always the function name
@@ -1877,8 +1879,7 @@ sub process_file($) {
                $in_purpose = 0;
                $contents = $newcontents;
                 $new_start_line = $.;
-               while ((substr($contents, 0, 1) eq " ") ||
-                      substr($contents, 0, 1) eq "\t") {
+               while (substr($contents, 0, 1) eq " ") {
                    $contents = substr($contents, 1);
                }
                if ($contents ne "") {
@@ -1947,8 +1948,7 @@ sub process_file($) {
                $contents = $2;
                 $new_start_line = $.;
                if ($contents ne "") {
-                   while ((substr($contents, 0, 1) eq " ") ||
-                          substr($contents, 0, 1) eq "\t") {
+                   while (substr($contents, 0, 1) eq " ") {
                        $contents = substr($contents, 1);
                    }
                    $contents .= "\n";