Problem with git merge

[tobiasBora]

Hello,

Thank you for this great tool. I don't know why, but I can't merge two branches that are supported by git-crypt... If I tried, the conflicted files are not changed at all, and I can't find any <<<<<< HEAD inside.

I'm using git-crypt 0.6.0, from debian unstable repository. Maybe it's related to this PR: https://github.com/AGWA/git-crypt/pull/107/commits/7a231050232eda53ca63aa6cc124113ae6ff8270

Thank you!

[tobiasBora]

Ok, so i found a quick workaround that should be easy to implement (and it seems to even work with git mergetools):

First in the file .git/config, add at the end containing:

[merge "git-crypt"]
	name = A custom merge driver used to merge git-crypted files.
	driver = ./my-merge-tool.sh %O %A %B
	recursive = binary

and at the root of the repository, create a file my-merge-tool.sh:

#!/usr/bin/env bash
ancestor_decrypted="$1__decrypt"
current_decrypted="$2__decrypt"
other_decrypted="$3__decrypt"
echo ""
echo "###########################"
echo "# Git crypt driver called #"
echo "###########################"
echo ""

echo "Decrypting ancestor file..."
cat $1 | git-crypt smudge > "${ancestor_decrypted}"
echo "Decrypting current file..."
cat $2 | git-crypt smudge > "${current_decrypted}"
echo "Decrypting other file..."
cat $3 | git-crypt smudge > "${other_decrypted}"
echo ""

echo "Merging ..."
git merge-file -L "current branch" -L "ancestor branch" -L "other branch" "${current_decrypted}" "${ancestor_decrypted}" "${other_decrypted}"
exit_code=$?
cat "${current_decrypted}" | git-crypt clean > $2

echo "Removing temporary files..."
rm "${other_decrypted}" "${ancestor_decrypted}" "${current_decrypted}"

if [ "$exit_code" -eq "0" ]
then
    echo "@@@ No conflict!"
else
    echo "@@@ You need to solve some conflicts..."
fi

exit $exit_code

Then make sure it's executable:

chmod +x my-merge-tool.sh

and modify your .gitattributes to add a merge option, with something like:

crypt/** filter=git-crypt diff=git-crypt merge=git-crypt

That's all, you can now merge, and even use "mergetool"!

NB: you can of course put any folder for my-merge-tool.sh, like in the .git-crypt/ folder, you just need to be consistent.

Would it be possible to include this in the git-crypt tool so that by default the configuration is the good one?

[tobiasBora]

I created a pull request, it should work now on any new git-crypt repository https://github.com/AGWA/git-crypt/pull/141

[themoritz]

Thanks for the workaround @tobiasBora, it works perfectly.

[tobiasBora]

No problem. And this workaround also corrects the cherry-pick problem. By the way I put a wrong link for the PR above, this one is better : https://github.com/AGWA/git-crypt/pull/141 Just, this PR does not correct the repo that has already been initialized.

[fullofcaffeine]

+1 thanks for this @tobiasBora, works great!