Re: Custom Merge

[Johannes Sixt <j.sixt@viscovery.net>]

Am 4/23/2012 14:25, schrieb Jose Ricardo:
> In my project, I have a lot of image files, that I wanted to process using 
> a different tool. For this, after reading some posts about custom merge 
> drivers in this forum, I make the following modifications:
> 
> In the file .gitconfig I added the following lines:
> 
> 
> [merge "imgfile"]
>         name = Driver for image files
>         driver = /usr/local/bin/git-merge-img.sh %O %A %B %L
>         recursive = binary
> 
> and in the .gitinfoattributes I put:
> 
> *.png   merge=imgfile
> 
> As I can see, it works calling my custom script during a merge between
>  two branches that have a .png file. Unfortunately, even after a successfully 
> merge, the final image is not merged with the one in the other branch. 
> In order to test it, I've called my script using three images, giving me the 
> corrected result.
> 
> I don't know if it could help but instead of changing the content of the file
>  I create another one with the same name during a merge operation.

I have my image merge script configured it like this:

[merge "imgfile"]
	driver = imgmerge %O %A %B %A

but if you do that, you must be sure that the script does not need to
access $2 after it has begun writing to $4.

(I know that it worked because at one time I had forgotten that I have a
custom merge driver, and was expecting a merge conflict due to an image
file, but there was no conflict, and the result was correct ;-)

-- Hannes