Re: regression: checkpatch.pl fails when called via symlink

From: Joe Perches
Date: Wed Oct 22 2014 - 13:13:42 EST


On Wed, 2014-10-22 at 16:25 +0300, Jani Nikula wrote:
> On Wed, 22 Oct 2014, Joe Perches <joe@xxxxxxxxxxx> wrote:
> > On Wed, 2014-10-22 at 13:43 +0300, Jani Nikula wrote:
> >> Since commit 66b47b4a9dad00e45c049d79966de9a3a1f4d337
> >> Author: Kees Cook <keescook@xxxxxxxxxxxx>
> >> Date: Mon Oct 13 15:51:57 2014 -0700
> >> checkpatch: look for common misspellings
> >> checkpatch.pl dies with
> >> checkpatch.pl: Can't open /path/to/spelling.txt for reading: No such file or directory
> >>
> >> if it's called through a symlink in /path/to/checkpatch.pl pointing at
> >> the actual script.
> >>
> >> Please fail graciously, and just ignore spelling if you can't find
> >> spelling.txt. Or better yet, follow the links if you can.
> >
> > I agree it should fail better, but I'm also curious.
> > Why you want to use a symlink?
>
> Simply because I think having $HOME/bin in $PATH and a symlink there is
> better than the alternatives.
[]
> Reference: http://xkcd.com/1172/

:)

Try this:

scripts/checkpatch.pl | 38 +++++++++++++++++++++-----------------
1 file changed, 21 insertions(+), 17 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index d94f5d8..a6354ec 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -7,10 +7,11 @@

use strict;
use POSIX;
+use File::Basename;
+use Cwd 'abs_path';

my $P = $0;
-$P =~ s@(.*)/@@g;
-my $D = $1;
+my $D = dirname(abs_path($P));

my $V = '0.32';

@@ -438,26 +439,29 @@ our $allowed_asm_includes = qr{(?x:

# Load common spelling mistakes and build regular expression list.
my $misspellings;
-my @spelling_list;
my %spelling_fix;
-open(my $spelling, '<', $spelling_file)
- or die "$P: Can't open $spelling_file for reading: $!\n";
-while (<$spelling>) {
- my $line = $_;

- $line =~ s/\s*\n?$//g;
- $line =~ s/^\s*//g;
+if (open(my $spelling, '<', $spelling_file)) {
+ my @spelling_list;
+ while (<$spelling>) {
+ my $line = $_;

- next if ($line =~ m/^\s*#/);
- next if ($line =~ m/^\s*$/);
+ $line =~ s/\s*\n?$//g;
+ $line =~ s/^\s*//g;

- my ($suspect, $fix) = split(/\|\|/, $line);
+ next if ($line =~ m/^\s*#/);
+ next if ($line =~ m/^\s*$/);
+
+ my ($suspect, $fix) = split(/\|\|/, $line);

- push(@spelling_list, $suspect);
- $spelling_fix{$suspect} = $fix;
+ push(@spelling_list, $suspect);
+ $spelling_fix{$suspect} = $fix;
+ }
+ close($spelling);
+ $misspellings = join("|", @spelling_list);
+} else {
+ warn "No typos will be found - file '$spelling_file': $!\n";
}
-close($spelling);
-$misspellings = join("|", @spelling_list);

sub build_types {
my $mods = "(?x: \n" . join("|\n ", @modifierList) . "\n)";
@@ -2246,7 +2250,7 @@ sub process {
}

# Check for various typo / spelling mistakes
- if ($in_commit_log || $line =~ /^\+/) {
+ if (defined($misspellings) && ($in_commit_log || $line =~ /^\+/)) {
while ($rawline =~ /(?:^|[^a-z@])($misspellings)(?:$|[^a-z@])/gi) {
my $typo = $1;
my $typo_fix = $spelling_fix{lc($typo)};


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