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checkpatch: cache last camelcase hash as .checkpatch-camelcase.<commit>

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Add a file to cache the CamelCase variables found by <commit> to reduce
the time it takes to scan the include/ directory.

Filename is '.checkpatch-camelcase.<commit>' and it is created only only
if a .git directory exists.

<commit> is determined by the last non-merge commit id in the
include/ path.

Reduces checkpatch run time by ~12 cpu seconds on my little netbook.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joe Perches 2013-07-03 15:05:36 -07:00 committed by Linus Torvalds
parent 7d0b6594e1
commit 351b2a1fe2
1 changed files with 26 additions and 0 deletions
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26
scripts/checkpatch.pl
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@ -399,7 +399,23 @@ sub seed_camelcase_includes {
return if ($camelcase_seeded);
my $files;
my $camelcase_git_file = "";
if (-d ".git") {
my $git_last_include_commit = `git log --no-merges --pretty=format:"%h%n" -1 -- include`;
chomp $git_last_include_commit;
$camelcase_git_file = ".checkpatch-camelcase.$git_last_include_commit";
if (-f $camelcase_git_file) {
open(my $camelcase_file, '<', "$camelcase_git_file")
or warn "$P: Can't read '$camelcase_git_file' $!\n";
while (<$camelcase_file>) {
chomp;
$camelcase{$_} = 1;
}
close($camelcase_file);
return;
}
$files = `git ls-files include`;
} else {
$files = `find $root/include -name "*.h"`;
@ -409,6 +425,16 @@ sub seed_camelcase_includes {
seed_camelcase_file($file);
}
$camelcase_seeded = 1;
if ($camelcase_git_file ne "") {
unlink glob ".checkpatch-camelcase.*";
open(my $camelcase_file, '>', "$camelcase_git_file")
or warn "$P: Can't write '$camelcase_git_file' $!\n";
foreach (sort { lc($a) cmp lc($b) } keys(%camelcase)) {
print $camelcase_file ("$_\n");
}
close($camelcase_file);
}
}
$chk_signoff = 0 if ($file);