This patch makes it so we attempt to resolve a symbol as the
non-obsolete commits in a change id if all other resolutions
fail.
This addresses issue #15. I decided to not require any operator for
looking up by change id. I want to make it as easy as possible to use
change ids instead of commit ids to see how well it works to interact
mostly with change ids instead of commit ids (I'll try to test that by
using it myself).
The fact that the default change id in git repos is currently a prefix
of the commit id makes it impossible to use for resolving a prefix of
the change id to commits. This patch addresses that by reversing the
bits of the change id (relative to the commit id). The next patch will
make it so a change id (or a prefix thereof) is a valid revset.
I'd like to experiment with mostly using change ids instead of commit
ids on the CLI. Then it needs to be easy to refer to the non-obsolete
commits in a change, which means we probably don't want to require any
operators (i.e. a plain change id should resolve to the non-obsolete
commits in the change). This patch prepares for letting a change id
resolve to (possibly) many commits.
I had initially hoped that the type-safety provided by the separate
`FileRepoPath` and `DirRepoPath` types would help prevent bugs. I'm
not sure if it has prevented any bugs so far. It has turned out that
there are more cases than I had hoped where it's unknown whether a
path is for a directory or a file. One such example is for the path of
a conflict. Since it can be conflict between a directory and a file,
it doesn't make sense to use either. Instead we end up with quite a
bit of conversion between the types. I feel like they are not worth
the extra complexity. This patch therefore starts simplifying it by
replacing uses of `FileRepoPath` by `RepoPath`. `DirRepoPath` is a
little more complicated because its string form ends with a '/'. I'll
address that in separate patches.
I thought I had looked for this case and cleaned up all the places
when I made `Transaction::commit()` return a new `ReadonlyRepo`. I
must have forgotten to do that, because there we tons of places to
clean up left.
This commit rewites the divergence-resolution part of `evolve()` as an
iterator (though not implementing the `Iterator` trait). Iterators are
just much easier to work with: they can easily be stopped, and errors
are easy to propagate. This patch therefore lets us propagate errors
from writing to stdout (typically pipe errors).
This makes the workging copy walk skip an entire ignored directory if
there are no negative patterns later in the ignore file. That speeds
up `jj st` in this repo with ~13k files in `target/` from ~100 ms to
~25 ms (6.0dB). This closes issue #8.
This is to address issue #8. I haven't added the optimization to avoid
walking all the files in `target/` yet. Even so, this patch still
speeds up `jj st` in this repo, with ~13k files in `target/`, from
~320 ms to ~100 ms (-5.1dB). The time actually checking if paths match
gitignores seems to go down from 116 ms to 6 ms. I think that's mostly
because libgit2 has to look for `.gitignore` files in every parent
directory every time we ask it about a file, while the rewritten code
looks for a `.gitignore` file only when visiting a new directory.
When using the command line interface (which is the only interface so
far), it seems more useful to see the exact command that was run than
a logical description of what it does. This patch makes the CLI record
that information in the operation metadata in a new key/value field. I
put it in a generic key/value field instead of a more specialized
field because the key/value field seems like a useful thing to have in
general. However, that means that we "have to" do shell-escaping when
saving the data instead of leaving the data unescaped and adding the
shell-escaping when presenting it. I added very simple shell-escaping
for now.
I've wanted the API to look like this for a while. It seems like a
good API to me. It means that the caller won't have to reload the repo
after committing. The cost seems relatively small. It involves copying
potentially a lot of data in memory (at least the View object), but it
shouldn't involve reading from disk or any other processing. To reduce
the amount of data to copy, it may be worth switching to persistent
data types. I've also wanted to do that for the copying we do when
start a transaction.
I couldn't measure any slowdown caused by this change.
