til/jj/colocate-jj-and-git-directories-for-project.md

Colocate jj And git Directories For Project

When doing a standard clone of a git repository with jj, you'll get a copy of the project with a .jj directory containing the version control information.

$ jj git clone git@github.com:jbranchaud/my-repo
Fetching into new repo in "/path/of/local/repo"
...

$ exa --tree --all -L 1
.
├── .gitignore
├── .jj
├── Cargo.lock
├── Cargo.toml
└── src

This is fine if I'm completely familiar with using jujutsu. However, if I'm coming from git and still learning, then it would be nice to be able to fallback to familiar git commands when needed.

But without a .git directory, I get this:

$ git log
fatal: not a git repository (or any of the parent directories): .git

When cloning a git repo with jj, I can instruct it to colocate which means that it will create both the .jj and the .git data directories in the project.

$ jj git clone --colocate git@github.com:jbranchaud/my-repo
Fetching into new repo in "/path/of/local/repo"
...

$ exa --tree --all -L 1
.
├── .git
├── .gitignore
├── .jj
├── Cargo.lock
├── Cargo.toml
└── src

Now I can run jj commands or git commands:

$ git log
commit 0c72abbb83657096677f9a3d5ddc7bce20839165 (HEAD, origin/trunk, trunk)
...

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