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Simon Mannes
Simon Mannes

Posted on • Originally published at on

How To Fix Merge Conflicts in yarn.lock and package-lock.json

Merge conflicts happen.

With lock files, this can happen if you have different packages (or package versions) installed than in the branch you want to merge.

Fixing the package.json definition may take some work, but in difficult cases you can work together with the colleague who made the changes in the other branch.

But the yarn.lockfile (or package-json.log)? Oh my..

It's so long and may have dozens of conflicts for every single conflict in package.json.

The thing is.. You don't need to fix those merge conflicts yourself.

It is a file that's generated. Not written by a human.

Fixing merge conflicts there is a simple three-step process:

# 1.
rm yarn.lock

# 2.

# 3. 
git add yarn.lock
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Replace yarn.lock with package-lock.json if you're using npm.

Make your developer life simpler. Don't edit machine-generated files by hand. Simply regenerate them.

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