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SubjectRe: [PATCH] checkpatch: Avoid missing typo suggestions
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On Wed, 2020-06-03 at 16:19 -0700, Kees Cook wrote:
> My codespell dictionary has a lot of capitalized words. For example:
>
> MSDOS->MS-DOS
>
> Since checkpatch uses case-insensitive matching, I get an undefined
> variable warning and then empty suggestions for things like this:
>
> Use of uninitialized value $typo_fix in concatenation (.) or string at ./scripts/checkpatch.pl line 2958.
>
> WARNING: 'msdos' may be misspelled - perhaps ''?
> + struct msdos_dir_entry *de;
>
> This fixes the matcher to avoid the warning, but it's still a rather
> silly suggestion:
>
> WARNING: 'msdos' may be misspelled - perhaps 'MS-DOS'?
> + struct msdos_dir_entry *de;
>
> So I'm not really sure what to do with this ... filter out bad
> suggestions instead?

Hey Kees.

Maybe this?

btw: My codespell dictionary file moved to
/usr/lib/python3/dist-packages/codespell_lib/data/dictionary.txt

and I had to use --codespell --codespellfile=(above) so
maybe there should be multiple lookups for this file
like the array below.

Are there other standard codespell dictionary locations?
---
scripts/checkpatch.pl | 31 ++++++++++++++++++++++++++-----
1 file changed, 26 insertions(+), 5 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 5f00df2c3f59..52aa0dd53d80 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -59,7 +59,7 @@ my $minimum_perl_version = 5.10.0;
my $min_conf_desc_length = 4;
my $spelling_file = "$D/spelling.txt";
my $codespell = 0;
-my $codespellfile = "/usr/share/codespell/dictionary.txt";
+my $codespellfile;
my $conststructsfile = "$D/const_structs.checkpatch";
my $typedefsfile = "";
my $color = "auto";
@@ -716,7 +716,20 @@ if (open(my $spelling, '<', $spelling_file)) {
}

if ($codespell) {
- if (open(my $spelling, '<', $codespellfile)) {
+ if (!defined($codespellfile)) {
+ my @csfiles = ("/usr/share/codespell/dictionary.txt",
+ "/usr/lib/python3/dist-packages/codespell_lib/data/dictionary.txt");
+ foreach my $csfile (@csfiles) {
+ if (-f $csfile) {
+ $codespellfile = $csfile;
+ last;
+ }
+ }
+ }
+
+ if (!defined($codespellfile)) {
+ warn "No codespell typos will be found - codespell dictionary not found\n";
+ } elsif (open(my $spelling, '<', $codespellfile)) {
while (<$spelling>) {
my $line = $_;

@@ -2963,13 +2976,21 @@ sub process {
while ($rawline =~ /(?:^|[^a-z@])($misspellings)(?:\b|$|[^a-z@])/gi) {
my $typo = $1;
my $typo_fix = $spelling_fix{lc($typo)};
- $typo_fix = ucfirst($typo_fix) if ($typo =~ /^[A-Z]/);
- $typo_fix = uc($typo_fix) if ($typo =~ /^[A-Z]+$/);
+ $typo_fix = $spelling_fix{$typo} if (!defined($typo_fix));
+ $typo_fix = $spelling_fix{uc($typo)} if (!defined($typo_fix));
+ $typo_fix = 'unknown typo fix' if (!defined($typo_fix));
+ if ($typo =~ /^[A-Z]+$/) {
+ $typo_fix = uc($typo_fix);
+ } elsif ($typo =~ /^[A-Z]/) {
+ $typo_fix = ucfirst($typo_fix);
+ }
+
my $msg_level = \&WARN;
$msg_level = \&CHK if ($file);
if (&{$msg_level}("TYPO_SPELLING",
"'$typo' may be misspelled - perhaps '$typo_fix'?\n" . $herecurr) &&
- $fix) {
+ $fix &&
+ $typo_fix ne 'unknown typo fix') {
$fixed[$fixlinenr] =~ s/(^|[^A-Za-z@])($typo)($|[^A-Za-z@])/$1$typo_fix$3/;
}
}
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