Re: git-add fails after file type change

[Junio C Hamano <junkio@cox.net>]

Steven Grimm <koreth@midwinter.com> writes:

> A Large Angry SCM wrote:
>> Did you try "git-update-index --replace dir"?
>
> Turns out that doesn't work. It gives me the same error I get without
> the --replace option:
>
> error: dir: cannot add to the index - missing --add option?
> fatal: Unable to process file dir

"update-index --replace --add" would be the way.

        $ git ls-files -s
        100644 fa457baf8abbf5dd3bb4cbfab0c5a4cf0523d7f8 0	1/2
        100644 00750edc07d6415dcc07ae0351e9397b0222b7ba 0	3
        $ ls -F
        ./  ../  1/  3	.git/

There is file 1/2 in directory 1.

        $ mv 1 tmp ; mv 3 1 ; mv tmp 3
        $ ls -F
        ./  ../  1  3/	.git/

I just swapped them.

        $ git update-index --replace --add 1
        $ git ls-files -s
        100644 00750edc07d6415dcc07ae0351e9397b0222b7ba 0	1
        100644 00750edc07d6415dcc07ae0351e9397b0222b7ba 0	3

You are allowing update-index to 'add' things so you would need
to say --add regardless of --replace (--replace is only to allow
removal of conflicting entries while adding).  In the hindsight,
we could have implied --add with --replace, but that is the way
it is, and update-index is not a Porcelain so there is not much
point fixing it now.

But I think you helped me to spot a bug ;-).

        $ git update-index --replace --add 3/2
        $ git ls-files -s
        100644 00750edc07d6415dcc07ae0351e9397b0222b7ba 0	1
	100644 00750edc07d6415dcc07ae0351e9397b0222b7ba 0	3
        100644 fa457baf8abbf5dd3bb4cbfab0c5a4cf0523d7f8 0	3/2

The entry '3' should have been removed when we did --replace.
This index cannot be written out as a tree:

	$ git write-tree
        You have both 3 and 3/2
        fatal: git-write-tree: error building trees

Currently we need to remove '3' by hand X-<.

        $ git update-index --remove 3
        $ git ls-files -s
        100644 00750edc07d6415dcc07ae0351e9397b0222b7ba 0	1
        100644 fa457baf8abbf5dd3bb4cbfab0c5a4cf0523d7f8 0	3/2
        $ git write-tree
        77be0dd800d74913a90662e35215ee648815fc17