Re: My custom cccmd

[Felipe Contreras <felipe.contreras@gmail.com>]

On Thu, Oct 15, 2009 at 11:37 PM, Felipe Contreras
<felipe.contreras@gmail.com> wrote:
> On Thu, Oct 15, 2009 at 11:09 PM, Junio C Hamano <gitster@pobox.com> wrote:
>>  #2. If you have two patch series that updates one file twice, some
>>     changes in your second patch could even be an update to the changes
>>     you introduced in your first patch.  After you fix issue #1, you
>>     would probably want to fix this by excluding the commits you have
>>     already sent the blames for.
>
> How exactly? By looking at the commit from 'git blame' and discarding
> it? That would be a bit tricky since each instance of 'cccmd' is not
> aware of the previous ones.

I explored this a bit more and I've come to the conclusion that we
actually don't wand to discard the previous commits in the patch
series. Let's think about this example:
0001 <- John
0002 <- Me overriding some changes from John

In this case we want John to appear in the CC list of 0002, because we
are changing his code. If it turns out that the whole patch series was
written by me, it's still ok for me to appear on the CC list, which
would essentially be "discarding" those commits.

So all we need to do is pick @from^ as the base of the git blame:
@@ -17,11 +17,12 @@ end
 ARGV.each do |filename|
   patch_file = File.open(filename)
   patch_file.each_line do |patch_line|
+    @from ||= patch_line[/From (\w+)/, 1]
     case patch_line
     when /^---\s+(\S+)/
       @source = $1[2..-1]
     when /^@@\s-(\d+),(\d+)/
-      blame = `git blame -p -L #{$1},+#{$2} #{@source} | grep author`
+      blame = `git blame --incremental -L #{$1},+#{$2} #{@source}
#{@from}^ | grep author`
       blame.each_line { |l| parse_blame(l.chomp) }
     end
   end

You can find the whole script here:
http://gist.github.com/218093

Cheers.

-- 
Felipe Contreras