mirror of
https://github.com/martinvonz/jj.git
synced 2024-12-26 05:57:10 +00:00
82 lines
4.1 KiB
Markdown
82 lines
4.1 KiB
Markdown
# Working copy
|
|
|
|
|
|
## Introduction
|
|
|
|
The working copy is where the current checkout's files are written so you can
|
|
interact with them. It also where files are read from in order to create new
|
|
commits (though there are many other ways of creating new commits).
|
|
|
|
Unlike most other VCSs, Jujutsu will automatically create commits from the
|
|
working copy contents when they have changed. Most `jj` commands you run will
|
|
commit the working copy changes if they have changed. The resulting revision
|
|
will replace the previous working copy revision.
|
|
|
|
Also unlike most other VCSs, added files are implicitly tracked. That means that
|
|
if you add a new file to the working copy, it will be automatically committed
|
|
once you run e.g. `jj st`. Similarly, if you remove a file from the working
|
|
copy, it will implicitly be untracked. To untrack a file while keeping it in
|
|
the working copy, first make sure it's [ignored](#ignored-files) and then run
|
|
`jj untrack <path>`.
|
|
|
|
Jujutsu currently supports only one working copy
|
|
(https://github.com/martinvonz/jj/issues/13).
|
|
|
|
|
|
## Open/closed revisions
|
|
|
|
As described in the introduction, Jujutsu automatically rewrites the current
|
|
checkout with any changes from the working copy. That works well while you're
|
|
developing that revision. On the other hand, if you check out some existing
|
|
revision, you generally don't want changes to the working copy to automatically
|
|
rewrite that revision. Jujutsu has a concept of "open" and "closed" revisions to
|
|
solve this. When you check out a closed revision, Jujutsu will actually create a
|
|
new, *open* revision on top of it and check that out. The checked-out revision
|
|
is thus always open. When you are done making changes to the currently
|
|
checked-out revision, you close it by running `jj close`. That command then
|
|
updates to the rewritten revision (as most `jj` commands do), and since the
|
|
rewritten revision is now closed, it creates a new open revision on top. If you
|
|
check out a closed revision and make changes on top of it that you want to go
|
|
into the revision, use `jj squash`.
|
|
|
|
|
|
## Conflicts
|
|
|
|
When you check out a commit with conflicts, those conflicts need to be
|
|
represented in the working copy somehow. However, the file system doesn't
|
|
understand conflicts. Jujutsu's solution is to add conflict markers to
|
|
conflicted files when it writes them to the working copy. It also keeps track of
|
|
the (typically 3) different parts involved in the conflict. Whenever it scans
|
|
the working copy thereafter, it parses the conflict markers and recreates the
|
|
conflict state from them. You can resolve conflicts by replacing the conflict
|
|
markers by the resolved text. You don't need to resolve all conflicts at once.
|
|
You can even resolve part of a conflict by updating the different parts of the
|
|
conflict marker.
|
|
|
|
If the commit with conflicts was closed, your conflict resolution would be in
|
|
the working copy commit. Once you have resolved the conflicts, you would then
|
|
typically use `jj squash` to move the conflict resolutions into the conflicted
|
|
commit.
|
|
|
|
If the commit with conflicts was open, it would simply not have conflicts
|
|
anymore once you have resolved them. If you prefer to do the conflict resolution
|
|
in a separate commit, you can use `jj new` before you resolve the conflicts and
|
|
then `jj squash` once you're done.
|
|
|
|
There's not yet a way of resolving conflicts in an external merge tool
|
|
(https://github.com/martinvonz/jj/issues/18). There's also no good way of
|
|
resolving conflicts between directories, files, and symlinks
|
|
(https://github.com/martinvonz/jj/issues/19). You can use `jj restore` to
|
|
choose one side of the conflict, but there's no way to even see where the
|
|
involved parts came from.
|
|
|
|
|
|
## Ignored files
|
|
|
|
You probably don't want build outputs and temporary files to be under version
|
|
control. You can tell Jujutsu to not automatically track certain files by using
|
|
`.gitignore` files (there's no such thing as `.jjignore` yet).
|
|
See https://git-scm.com/docs/gitignore for details about the format.
|
|
`.gitignore` files are supported in any directory in the working copy, as well
|
|
as in `$HOME/.gitignore`. However, `$GIT_DIR/info/exclude` or equivalent way
|
|
(maybe `.jj/gitignore`) of specifying per-clone ignores is not yet supported.
|