Re: [BUG] GIT_INDEX environment variable ignored?

[Michael J Gruber <git@drmicha.warpmail.net>]

McAuley, Ben venit, vidit, dixit 08.10.2015 06:48:
> Hello,
> 
> I was trying to use multiple indexes earlier, and ran into an issue which I've summarised into a test case:
> 
> $ git init
> $ touch file1 && git add file1 && git commit -m "file1"
> $ git branch release 
> $ touch file2 && git add file2 && git commit -m "file2"
> $ cp .git/index .git/indexMaster
> $ git checkout release
> $ touch file3 && git add file3 && git commit -m "file3"
> 
> I then ran ls-files with the --stage option to look at what the index contains.
> As expected file1 and file3 are present, we're on the 'release' branch still.
> 
> $ git ls-files --stage
> 100644 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0       file1
> 100644 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0       file3
> 
> However when I run the same command again, this time using the 
> GIT_INDEX env variable to provide the index I previously saved on master,
> I don't see file2 like I'd expect...
> 
> $ GIT_INDEX=.git/indexMaster git ls-files --stage
> 100644 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0       file1
> 100644 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0       file3
> 
> Is this something going wrong, or am I misunderstanding the role of the index/GIT_INDEX variable?
> 
> Replicated on 2.5.0.windows.1 and 2.6.1 (Linux).

Maybe try GIT_INDEX_FILE instead of GIT_INDEX? ;)

Michael