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SubjectRe: [PATCH v2] checkpatch: add fix option for LOGICAL_CONTINUATIONS
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On Sat, 2020-11-21 at 17:45 +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 adding logical operator at the end of previous
> line and removing from current line, if both the lines are additions
> (ie start with '+')
[]
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> @@ -3553,8 +3553,14 @@ 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 =~ /^\+/) {
> + # add logical operator to the previous line, remove from current line
> + $fixed[$fixlinenr - 1] .= " $operator";
> + $fixed[$fixlinenr] =~ s/\Q$operator\E\s*//;
> + }

One thing to be concerned about is a statement like

if (foo // comment
&& bar)

This should really perform the insertion at the last
non-comment, non-whitespace char of the previous line.


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