Bug 68451 – Prevent the WebKit frameworks from defining inappropriately-named Objective-C classes

• Component: WebKit API
• Status: RESOLVED FIXED

Patch forthcoming

Created attachment 108024 [details]
Add build phases that invoke a script that checks that Objective-C class names have appropriately-prefixed names

[Joseph Pecoraro]

Reading the new shell script Tools/Scripts/check-for-inappropriate-objc-class-names
as a diff against Tools/Scripts/check-for-weak-vtables-and-externals is a bit confusing.
It might be worth attaching the shell script as a separate attachment so we can see it
as a whole.

Created attachment 108029 [details]
bad attachment

This is the script added in attachment 108024 [details]

Created attachment 108030 [details]
check-for-inappropriate-objc-class-names

This is the script added in attachment 108024 [details].

[Joseph Pecoraro]

Comment on attachment 108024 [details]
Add build phases that invoke a script that checks that Objective-C class names have appropriately-prefixed names

View in context: https://bugs.webkit.org/attachment.cgi?id=108024&action=review

Thanks for putting up the attachment! Some drive-by comments about the script not meant to be a review. The script looks good to me, but I think someone who knows more about the `nm` output would be a better reviewer.

> Tools/Scripts/check-for-inappropriate-objc-class-names:55
> +my $pattern = "^(" . join('|', @allowedPrefixes) . ")";

Maybe consider regex escaping the @allowedPrefixes values. This can be done with \Qvalue\E inside of perl regexes. But here the input is known to be simple strings so that might just be overkill.
http://perldoc.perl.org/perlre.html#Quoting-metacharacters

> Tools/Scripts/check-for-inappropriate-objc-class-names:59
> +if (!defined $executablePathAge || !defined $buildTimestampAge || $executablePathAge < $buildTimestampAge || $scriptAge < $buildTimestampAge) {

This $scriptAge check looks useful. Maybe you could add that to check-for-weak-vtables-and-externals and other build scripts?

> Tools/Scripts/check-for-inappropriate-objc-class-names:91
> +            print "ERROR: Objective-C class names in $target must have the prefix \"" . $allowedPrefixes[0] . "\".";

This should end with a "\n".

Landed as <http://trac.webkit.org/r95655>.

(In reply to comment #5)
> (From update of attachment 108024 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=108024&action=review
> 
> Thanks for putting up the attachment! Some drive-by comments about the script not meant to be a review. The script looks good to me, but I think someone who knows more about the `nm` output would be a better reviewer.

Thanks for the comments!

> 
> > Tools/Scripts/check-for-inappropriate-objc-class-names:55
> > +my $pattern = "^(" . join('|', @allowedPrefixes) . ")";
> 
> Maybe consider regex escaping the @allowedPrefixes values. This can be done with \Qvalue\E inside of perl regexes. But here the input is known to be simple strings so that might just be overkill.

I decided that it was overkill and would actually obfuscate the code.

> This $scriptAge check looks useful. Maybe you could add that to check-for-weak-vtables-and-externals and other build scripts?

Seems like a good idea. One other script already has this check.

> 
> > Tools/Scripts/check-for-inappropriate-objc-class-names:91
> > +            print "ERROR: Objective-C class names in $target must have the prefix \"" . $allowedPrefixes[0] . "\".";
> 
> This should end with a "\n".

Done.