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SubjectRe: [PATCH v6] checkpatch: add fix option for LOGICAL_CONTINUATIONS
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On Sun, 2020-11-22 at 18:29 +0530, Aditya Srivastava wrote:
> Currently, checkpatch warns if logical continuations are placed at the
> start of a line and not at the end of previous line.
>
> E.g., running checkpatch on commit 3485507fc272 ("staging:
> bcm2835-camera: Reduce length of enum names") reports:
>
> CHECK:LOGICAL_CONTINUATIONS: Logical continuations should be on the
> previous line
> + if (!ret
> + && camera_port ==
>
> Provide a simple fix by inserting logical operator at the last
> non-comment, non-whitespace char of the previous line and removing from
> current line, if both the lines are additions(ie start with '+')
>
> Signed-off-by: Aditya Srivastava <yashsri421@gmail.com>
[]
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> @@ -3553,8 +3553,16 @@ sub process {
>  
>
>  # check for && or || at the start of a line
>   if ($rawline =~ /^\+\s*(&&|\|\|)/) {
> - CHK("LOGICAL_CONTINUATIONS",
> - "Logical continuations should be on the previous line\n" . $hereprev);
> + my $operator = $1;
> + if (CHK("LOGICAL_CONTINUATIONS",
> + "Logical continuations should be on the previous line\n" . $hereprev) &&
> + $fix && $prevrawline =~ /^\+/) {
> + # insert logical operator at last non-comment, non-whitepsace char on previous line
> + $prevline =~ /[\s$;]*$/;
> + my $line_end = substr($prevrawline, $-[0]);
> + $fixed[$fixlinenr - 1] =~ s/\Q$line_end\E/ $operator$line_end/;

This doesn't work when the same leading whitespace and trailing whitespace
characters exist.

You need to use something like:

$fixed[$fixlinenr - 1] =~ s/\Q$line_end\E$/ $operator$line_end/;

(note the $ after \E to use EOL)


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