We had a recent bug where we used a repo reference from before we
started a transaction and modified the repo. While it's often safe and
correct to use such references, it isn't always. This patch removes
all such cases. I think it generally makes the code clearer, and
better prepared for #50, if we ever get around to that. I found these
by temporarily making `WorkspaceCommandHelper::start_transaction()`
take a mutable reference.
The `CommitBuilder::store` field is used only in
`CommitBuilder::write_to_repo()`, but we can easily get access to the
`Store` from the `repo` argument there, so let's remove the field.
I think I had not added tests for successful push before because I
thought there was some issue with testing it with libgit2. There *is*
an issue, which is that libgit2 requires the remote to be bare when
it's on local disk, but we can very easily make the git repo bare in
this test.
I also updated the error handling in the `git` module to not let
follow-on errors hide the real error and to not fail if two branches
moved to the same commit.
By adding `ui.open-commits=false` in your config, you can now make `jj
checkout` always create a new working-copy commit on top of the
specified commit. If the config is set, open commits will also appear
in the same color as closed commits in `jj log` etc. This will let
some of us experiment with the new UX before we decide if it's a good
idea or not. I left `jj close` in place because it's useful for
setting a description and creating a new commit in one step.
I didn't mention the new config in the release notes because I hope we
can reach a decision and remove the config before the next release.
When rebasing commits after rewrites, we also update all workspaces'
checkouts. If the new commit is closed, we create a new commit on
top. Since we're hoping to remove the open/closed concept, we need a
new condition. I considered creating a new commit on top if the change
ID was different from before the rewrite. However, that would make at
least `jj split` more complicated because it makes the first commit
keep the change ID but it wants the second commit to be checked
out. This patch instead creates the new commit on top only when the
original commit was abandoned.
I think it's conceptually simpler to create a new commit and set that
commit to be the checkout in each workspace than to check out the
commit in one workspace and edit in the others.
If a file gets replaced by a directory right after list files in a
directory but before we stat the file, we currently crash. Let's
instead treat it as a missing file, using the mechanism introduced for
#258.
This patch makes us treat special files (e.g. Unix sockets) as absent
when snapshotting the working copy. We can consider later reporting
such files back to the caller (possibly via callback) so it can inform
the user about them.
Closes#258
This patch is essentially f6a516ff6d taken further, to also apply to
when we write a symlink or a conflict. As with regular files, these
races seem very unlikely to happen, but I found these cases while
working on #258, so let's fix. Fixing it also means that we don't need
to handle these transition cases in the next patch (when
`file_states()` can indicate that the file is e.g. a socket).
I plan to use this matcher for some future `jj add` command (for
#323). The idea is that we'll do a path-restricted walk of the working
copy based on the intersection of the sparse patterns and any patterns
specified by the user. However, I think it will be useful before that,
for @arxanas's fsmonitor feature (#362).
The new `Visit::Nothing` variant lets us more easily restructure
`DifferenceMatcher::visit()` to make it handle the case of not
removing anything. I think this makes the code a little clearer.
I didn't initially create a `Visit::Nothing` variant because I was
worried that the fact that there then are two ways of expressing this
value (there's also `Visit::Specific` with empty sets). However, the
value is quite useful for pattern matching, so I'm now thinking it's
worth the risk.
If a commit's author field has the placeholder user/email values
(i.e. "(no name configured)" and "(no email configured)"), and they
have now configured their email and username, they probably want us to
update the author field with the new information, so that's what this
patch does. Thanks to durin42@ for the suggestion on #322.
If the source commit becomes empty as a result of
`move/squash/unsquash`, we abandon it. However, perhaps we shouldn't
do that if the source commit is a working-copy commit because
working-copy commits are often work-in-progress commits.
The background for this change is that @arxanas had just started a new
change and had set a description on it, and then decided to make some
changes in the working copy that should be in the parent
commit. Running `jj squash` then abandoned the working-copy commit,
resuling in the description getting lost.
The regular `Display` format is (not surprisingly) more user-friendly,
as pointed out by @yuja.
I also switched to using format strings for these cases, and some
nearby strings for consistency.
We can easily make the `DirEntry` available here, so we can call
`.metadata()` on that instead of on the `Path`. I think that avoids
walking the path. I'm sure this has no significant impact on
performance, but it's also almost as readable.
When we have just written a file to disk on checkout, let's record the
size we expected instead of what we got from `fstat()`. This should
address a race where the file was modified between the time we wrote
it and the time we requested its stat. I just happened to notice this
while going through the code; it seems very unlikely to be noticed in
practice.
When we have just written a file or conflict, we can get metadata for
it via the open file descriptor instead of using the path. That
removes the risk of a race where the file got removed or replaced by
another file type (at least on Unix).
These assertions were there to catch bugs, but when the bugs happen,
the assertions can obsure the underlying error (as @tp-woven found out
on #258). Let's just print errors instead.
We don't even have any settings that affect the repo, so there's no
point in passing the settings. I think this was a leftover from before
we separated out the "workspace" concept; now we no longer create a
working-copy commit when we initialize a repo (we do that when we
attach the workspace).
We don't need the `config` crate's support for JSON etc., so let's
just enable the TOML feature. (Trying to import all the JSON, RON,
dependencies etc. into Google's source control was a pain.)
