Re: Bug report: 'git commit --dry-run' corner case: returns error ("nothing to commit") when all conflicts resolved to HEAD

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Ovidiu Gheorghioiu <ovidiug@xxxxxxxxx> wrote:
>  Hi git guys,
>
> The bug is fairly simple: if we have a conflicted merge, AND all the
> conflicts have been resolved to the version in HEAD, the commit
> --dry-run error code says nothing to commit. As expected, git commit
> goes through.
> 
> The commit message IS correct (-ish), just not the error code:
> 
> """
> All conflicts fixed but you are still merging.
>   (use "git commit" to conclude merge)
> 
> nothing to commit, working directory clean
> """
> 
> The script below demonstrates the problem; version tested was 2.5.0.
> Let me know if you need any more details.
> 
> Best,
> Ovidiu
> 
> ------
> #!/bin/bash
> mkdir test-repository || exit 1
> cd test-repository
> git init
> echo "Initial contents, unimportant" > test-file
> git add test-file
> git commit -m "Initial commit"
> echo "commit-1-state" > test-file
> git commit -m "commit 1" -i test-file
> git tag commit-1
> git checkout -b branch-2 HEAD^1
> echo "commit-2-state" > test-file
> git commit -m "commit 2" -i test-file
> 
> # Creates conflicted state.
> git merge --no-commit commit-1
> 
> # Resolved entirely to commit-2, aka HEAD.
> echo "commit-2-state" > test-file
> # If we'd set to commit-1=state, all would work as expected (changes vs HEAD).
> git add test-file
> 
> # =====  Bug is here.
> git commit --dry-run && echo "Git said something to commit" \
>         || echo "Git said NOTHING to commit"
> 
> git commit -m "Something to commit after all" && echo "Commit went through"
> 
> git log --pretty=oneline
> 
> cd ..

I've reproduced the bug with git 2.7.1. [1]
I plan on adding a test case and a patch to fix this.

[1] http://article.gmane.org/gmane.comp.version-control.git/276591

I would have responded to the original email but 
the gmane "follow-up" is not sending out the email.


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