2.15.1 - merge with submodule output issue

["FIGADERE, LAURENT" <laurent.figadere@atos.net>]

Dear git,

I use since few weeks now git 2.15.1.

I did few trials but please find here my outputs.

To reproduce:
Use a top module git which include a submodule
First step: from a work area, I changed selected version of submodule in master branch.
Then git add + git commit + git push
	A new commit on master branch has been published on my origin repository with the version v1.2 of submodule

Second step: in my second workarea, I created a user branch mybranch, then selected another release of submodule
I added the update and then commit in mybranch.
	A new commit with release v2.0 of submodule is in my last SHA1 of mybranch

Last step: in the second workarea, in mybranch, I first run ‘git fetch’ and then ‘git merge origin/master’
I got a CONFLICT message of course due to the 2 different versions of submodule.
Here the message:
warning: Failed to merge submodule submodule (commits don't follow merge-base) 
Auto-merging submodule 
CONFLICT (submodule): Merge conflict in submodule 
Automatic merge failed; fix conflicts and then commit the result. 

Now I thought that the command ‘git submodule’ provided an output with both versions of modules (local and remote).
But this is not the case in my environment:
[15:20:10] $ git submodule status 
U0000000000000000000000000000000000000000 submodule

And when I run the mergetool command I have this output:
[14:54:41] $ git mergetool 
Merging: 
submodule 
Submodule merge conflict for 'submodule': 
  {local}: submodule commit 08f86f2404d9f8f616262971a3127e69f39f9d11 
  {remote}: submodule commit b3dd6fde4f02258b88ad0b2dba6474c126b499f7 
Use (l)ocal or (r)emote, or (a)bort? 

So, it means it’s not usefull to determine which version has to be selected.
Is it a bug or perhaps I make something wrong?

It will be usefull if we can hav e this information during git mergetool command like with git describe .

Thanks for your help. 


-----------------------------

Laurent FIGADERE
CAD Engineer
GBDS RD Asic Verification
+33130805361
laurent.figadere@atos.net
Rue Jean Jaures BP 68
78340 Les Clayes-sous-Bois
France
www.Atos.net



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