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checkpatch: add command-line option for TAB size

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Linux kernel coding style requires a size of 8 characters for both TAB and
indentation, and such value is embedded as magic value allover the
checkpatch script.

This makes hard to reuse the script by other projects with different
requirements in their coding style (e.g.  OpenOCD [1] requires TAB size of
4 characters [2]).

Replace the magic value 8 with a variable.

Add a command-line option "--tab-size" to let the user select a
TAB size value other than 8.

[1] http://openocd.org/
[2] http://openocd.org/doc/doxygen/html/stylec.html#styleformat

Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Signed-off-by: Erik Ahlén <erik.ahlen@avalonenterprise.com>
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Joe Perches <joe@perches.com>
Link: http://lkml.kernel.org/r/20200122163852.124417-3-borneo.antonio@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Antonio Borneo 2020-04-06 20:11:07 -07:00 committed by Linus Torvalds
parent 7b18496cbc
commit 713a09de9c
1 changed files with 16 additions and 10 deletions
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26
scripts/checkpatch.pl
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@ -64,6 +64,7 @@ my $color = "auto";
my $allow_c99_comments = 1; # Can be overridden by --ignore C99_COMMENT_TOLERANCE
# git output parsing needs US English output, so first set backtick child process LANGUAGE
my $git_command ='export LANGUAGE=en_US.UTF-8; git';
my $tabsize = 8;
sub help {
my ($exitcode) = @_;
@ -98,6 +99,7 @@ Options:
--show-types show the specific message type in the output
--max-line-length=n set the maximum line length, if exceeded, warn
--min-conf-desc-length=n set the min description length, if shorter, warn
--tab-size=n set the number of spaces for tab (default 8)
--root=PATH PATH to the kernel tree root
--no-summary suppress the per-file summary
--mailback only produce a report in case of warnings/errors
@ -215,6 +217,7 @@ GetOptions(
'list-types!' => \$list_types,
'max-line-length=i' => \$max_line_length,
'min-conf-desc-length=i' => \$min_conf_desc_length,
'tab-size=i' => \$tabsize,
'root=s' => \$root,
'summary!' => \$summary,
'mailback!' => \$mailback,
@ -267,6 +270,9 @@ if ($color =~ /^[01]$/) {
die "Invalid color mode: $color\n";
}
# skip TAB size 1 to avoid additional checks on $tabsize - 1
die "Invalid TAB size: $tabsize\n" if ($tabsize < 2);
sub hash_save_array_words {
my ($hashRef, $arrayRef) = @_;
@ -1239,7 +1245,7 @@ sub expand_tabs {
if ($c eq "\t") {
$res .= ' ';
$n++;
for (; ($n % 8) != 0; $n++) {
for (; ($n % $tabsize) != 0; $n++) {
$res .= ' ';
}
next;
@ -2252,7 +2258,7 @@ sub string_find_replace {
sub tabify {
my ($leading) = @_;
my $source_indent = 8;
my $source_indent = $tabsize;
my $max_spaces_before_tab = $source_indent - 1;
my $spaces_to_tab = " " x $source_indent;
@ -3231,7 +3237,7 @@ sub process {
next if ($realfile !~ /\.(h|c|pl|dtsi|dts)$/);
# at the beginning of a line any tabs must come first and anything
# more than 8 must use tabs.
# more than $tabsize must use tabs.
if ($rawline =~ /^\+\s* \t\s*\S/ ||
$rawline =~ /^\+\s* \s*/) {
my $herevet = "$here\n" . cat_vet($rawline) . "\n";
@ -3250,7 +3256,7 @@ sub process {
"please, no space before tabs\n" . $herevet) &&
$fix) {
while ($fixed[$fixlinenr] =~
s/(^\+.*) {8,8}\t/$1\t\t/) {}
s/(^\+.*) {$tabsize,$tabsize}\t/$1\t\t/) {}
while ($fixed[$fixlinenr] =~
s/(^\+.*) +\t/$1\t/) {}
}
@ -3272,11 +3278,11 @@ sub process {
if ($perl_version_ok &&
$sline =~ /^\+\t+( +)(?:$c90_Keywords\b|\{\s*$|\}\s*(?:else\b|while\b|\s*$)|$Declare\s*$Ident\s*[;=])/) {
my $indent = length($1);
if ($indent % 8) {
if ($indent % $tabsize) {
if (WARN("TABSTOP",
"Statements should start on a tabstop\n" . $herecurr) &&
$fix) {
$fixed[$fixlinenr] =~ s@(^\+\t+) +@$1 . "\t" x ($indent/8)@e;
$fixed[$fixlinenr] =~ s@(^\+\t+) +@$1 . "\t" x ($indent/$tabsize)@e;
}
}
}
@ -3294,8 +3300,8 @@ sub process {
my $newindent = $2;
my $goodtabindent = $oldindent .
"\t" x ($pos / 8) .
" " x ($pos % 8);
"\t" x ($pos / $tabsize) .
" " x ($pos % $tabsize);
my $goodspaceindent = $oldindent . " " x $pos;
if ($newindent ne $goodtabindent &&
@ -3766,11 +3772,11 @@ sub process {
#print "line<$line> prevline<$prevline> indent<$indent> sindent<$sindent> check<$check> continuation<$continuation> s<$s> cond_lines<$cond_lines> stat_real<$stat_real> stat<$stat>\n";
if ($check && $s ne '' &&
(($sindent % 8) != 0 ||
(($sindent % $tabsize) != 0 ||
($sindent < $indent) ||
($sindent == $indent &&
($s !~ /^\s*(?:\}|\{|else\b)/)) ||
($sindent > $indent + 8))) {
($sindent > $indent + $tabsize))) {
WARN("SUSPECT_CODE_INDENT",
"suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n");
}