I think I prefer this behavior because it's less lossy. The user can
manually simplify the history with `jj rebase -s <merge commit> -d
<one of the parents>` afterwards. We can roll this change back later
if we find it annoying.
We now have lots of tests of ancestor merges in `test_bug_2600()`, so
we don't need the ones in `test_basics()`. Since it doesn't have the
"nottherootcommit" commit, it would break when we change the default
to preserve ancestor merges.
The shortest change id prefix will become a few digits longer, but I think
that's acceptable. Entries included in the "revsets.short-prefixes" set are
unaffected.
The reachable set is calculated eagerly, but this is still faster as we no
longer need to sort the reachable entries by change id. The lazy version will
save another ~100ms in mid-size repos.
"jj log" without working copy snapshot:
```
% hyperfine --sort command --warmup 3 --runs 20 -L bin jj-0,jj-1,jj-2 \
-s "target/release-with-debug/{bin} -R ~/mirrors/linux debug reindex" \
"target/release-with-debug/{bin} -R ~/mirrors/linux \
--ignore-working-copy log -r.. -l100 --config-toml='revsets.short-prefixes=\"\"'"
Benchmark 1: target/release-with-debug/jj-0 -R ~/mirrors/linux --ignore-working-copy log -r.. -l100 --config-toml='revsets.short-prefixes=""'
Time (mean ± σ): 353.6 ms ± 11.9 ms [User: 266.7 ms, System: 87.0 ms]
Range (min … max): 329.0 ms … 365.6 ms 20 runs
Benchmark 2: target/release-with-debug/jj-1 -R ~/mirrors/linux --ignore-working-copy log -r.. -l100 --config-toml='revsets.short-prefixes=""'
Time (mean ± σ): 271.3 ms ± 9.9 ms [User: 183.8 ms, System: 87.7 ms]
Range (min … max): 250.5 ms … 282.7 ms 20 runs
Relative speed comparison
1.99 ± 0.16 target/release-with-debug/jj-0 -R ~/mirrors/linux --ignore-working-copy log -r.. -l100 --config-toml='revsets.short-prefixes=""'
1.53 ± 0.12 target/release-with-debug/jj-1 -R ~/mirrors/linux --ignore-working-copy log -r.. -l100 --config-toml='revsets.short-prefixes=""'
```
"jj status" with working copy snapshot (watchman enabled):
```
% hyperfine --sort command --warmup 3 --runs 20 -L bin jj-0,jj-1,jj-2 \
-s "target/release-with-debug/{bin} -R ~/mirrors/linux debug reindex" \
"target/release-with-debug/{bin} -R ~/mirrors/linux \
status --config-toml='revsets.short-prefixes=\"\"'"
Benchmark 1: target/release-with-debug/jj-0 -R ~/mirrors/linux status --config-toml='revsets.short-prefixes=""'
Time (mean ± σ): 396.6 ms ± 10.1 ms [User: 300.7 ms, System: 94.0 ms]
Range (min … max): 373.6 ms … 408.0 ms 20 runs
Benchmark 2: target/release-with-debug/jj-1 -R ~/mirrors/linux status --config-toml='revsets.short-prefixes=""'
Time (mean ± σ): 318.6 ms ± 12.6 ms [User: 219.1 ms, System: 94.1 ms]
Range (min … max): 294.2 ms … 333.0 ms 20 runs
Relative speed comparison
1.85 ± 0.14 target/release-with-debug/jj-0 -R ~/mirrors/linux status --config-toml='revsets.short-prefixes=""'
1.48 ± 0.12 target/release-with-debug/jj-1 -R ~/mirrors/linux status --config-toml='revsets.short-prefixes=""'
```
When adding a new workspace, I would expect that it inherits the
patterns from the workspace I ran the command in. We currently don't
do that. That's quite annoying when your repo has very many files
(like at Google).
The `ContentHash` documentation specifies that implementations for enums should
hash the ordinal number of the variant contained in the enum as a 32-bit
little-endian number and then hash the contents of the variant, if any.
The current implementations for `std::Option`, `MergedTreeId`, and
`RemoteRefState` are non-conformant since they hash the ordinal number as a u8
with platform specific endianness.
Fixes#3051
The legacy parsing rules are turned into compatibility errors. The x:y rule
is temporarily enabled when parsing string patterns. It's weird, but we can't
isolate the parsing function because a string pattern may be defined in an
alias.
This adds a config to render a synthetic node with a "(elided
revisions)" description for elided segments of the graph.
I didn't add any templating support for the elided nodes because I'm
not sure how we would want that to work. In particular, I don't know
what `commit_id` and most other keywords should return for elided
revisions.
Users who edit non-head commits usually expect `jj next/prev` to
continue to edit the next/previous commit, so let's make that the
default behavior. This should not confuse users who don't edit
non-head commits since they will simply not be in this state. My main
concern is that doing `jj next; jj prev` will now usually take you
back to the previous commit, but not if you started on the parent of a
head commit.
The main goal is to avoid having a symlink in our source tree. Currently, there
is no good way to work with the `jj` repo with `jj` on Windows. Currently `jj`
just crashes with symlinks. This is being worked on, see e.g. #2939, but it will
always depend on whether Developer Mode is enabled in Windows or whether
symlinks are materialized as text files with symlinks. Finally, MkDocs has
trouble following symlinks on Windows, so building docs wouldn't work there.
Another advantage is that, previously, we were lucky that MkDocs treats `insta`
header in `cli-reference@.md.snap` as a Markdown header and follows symlinks at
all. Now, we no longer depend on that.
If the operation corresponding to a workspace is missing for some reason
(the specific situation in the test in this commit is that an operation
was abandoned and garbage-collected from another workspace), currently,
jj fails with a 255 error code. Teach jj a way to recover from this
situation.
When jj detects such a situation, it prints a message and stops
operation, similar to when a workspace is stale. The message tells the
user what command to run.
When that command is run, jj loads the repo at the @ operation (instead
of the operation of the workspace), creates a new commit on the @
commit with an empty tree, and then proceeds as usual - in particular,
including the auto-snapshotting of the working tree, which creates
another commit that obsoletes the newly created commit.
There are several design points I considered.
1) Whether the recovery should be automatic, or (as in this commit)
manual in that the user should be prompted to run a command. The user
might prefer to recover in another way (e.g. by simply deleting the
workspace) and this situation is (hopefully) rare enough that I think
it's better to prompt the user.
2) Which command the user should be prompted to run (and thus, which
command should be taught to perform the recovery). I chose "workspace
update-stale" because the circumstances are very similar to it: it's
symptom is that the regular jj operation is blocked somewhere at the
beginning, and "workspace update-stale" already does some special work
before the blockage (this commit adds more of such special work). But it
might be better for something more explicitly named, or even a sequence
of commands (e.g. "create a new operation that becomes @ that no
workspace points to", "low-level command that makes a workspace point to
the operation @") but I can see how this can be unnecessarily confusing
for the user.
3) How we recover. I can think of several ways:
a) Always create a commit, and allow the automatic snapshotting to
create another commit that obsoletes this commit.
b) Create a commit but somehow teach the automatic snapshotting to
replace the created commit in-place (so it has no predecessor, as viewed
in "obslog").
c) Do either a) or b), with the added improvement that if there is no
diff between the newly created commit and the former @, to behave as if
no new commit was created (@ remains as the former @).
I chose a) since it was the simplest and most easily reasoned about,
which I think is the best way to go when recovering from a rare
situation.
These operator symbols are different from the ones in the revset language. I
have no idea if we need bitwise operators, but we'll probably add comparison
operators. It would look weird if 'x == y & z' were parsed as '(x == y) & z'.
this greatly speeds up the time to run all tests, at the cost of slightly larger recompile times for individual tests.
this unfortunately adds the requirement that all tests are listed in `runner.rs` for the crate.
to avoid forgetting, i've added a new test that ensures the directory is in sync with the file.
## benchmarks
before this change, recompiling all tests took 32-50 seconds and running a single test took 3.5 seconds:
```
; hyperfine 'touch lib/src/lib.rs && cargo t --test test_working_copy'
Time (mean ± σ): 3.543 s ± 0.168 s [User: 2.597 s, System: 1.262 s]
Range (min … max): 3.400 s … 3.847 s 10 runs
```
after this change, recompiling all tests take 4 seconds:
```
; hyperfine 'touch lib/src/lib.rs ; cargo t --test runner --no-run'
Time (mean ± σ): 4.055 s ± 0.123 s [User: 3.591 s, System: 1.593 s]
Range (min … max): 3.804 s … 4.159 s 10 runs
```
and running a single test takes about the same:
```
; hyperfine 'touch lib/src/lib.rs && cargo t --test runner -- test_working_copy'
Time (mean ± σ): 4.129 s ± 0.120 s [User: 3.636 s, System: 1.593 s]
Range (min … max): 3.933 s … 4.346 s 10 runs
```
about 1.4 seconds of that is the time for the runner, of which .4 is the time for the linker. so
there may be room for further improving the times.
When the user doesn't have a configured default command, we show a
hint saying to set `ui.default-command`. I think the user is very
likely to want to set that in the user-wide config, so let's include
the command in the hint.
This reimplements the change 9faa4670d5 "cli: on init, import git refs prior
to importing HEAD." Initialization is special because the HEAD ref isn't
available to jj yet, and there is an empty working-copy commit.
The initialization function could be refactored to go through the common code
path, but I think doing that would make future improvement harder. We might
want to initialize tracking branches based on .git/config for example.
Fixes#2942
This initializes a git backed repo.
* It does the same thing as `jj init --git` except that it
has a --colocated flag to explicitly specify that we want
the .git repo to be side-by-side the .jj repo in the working
directory.
* `jj init --git` will keep the current behaviour and will not
be able to create colocated git backed repos.
* Update test snapshots.
A few minor updates after 0f27152 AKA #2945
Specifically, I tried to change the help text so that it looks better as
Markdown. I also reworded the deprecation warning and added a hint.
this has two main advantages:
- it makes it clear that the shells are mutually exclusive
- it allows us to extend the command with shell-specific options in the future if necessary
as a happy accident, it also adds support for `elvish` and `powershell`.
for backwards compatibility, this also keeps the existing options as hidden flags.
i am not super happy with how the new help looks; the instructions for setting up the shell are
squished together and IMO a little harder to read. i'm open to suggestions.
it's somewhat confusing to me that the `--bash` flag exists at all, since it does nothing - maybe it makes sense to give a hard error? or just remove the flag?
but in any case, it seems good to document the existing behavior.
previously, `jj diff` would show the full contents of binary files such as images.
after this change, it instead shows "(binary)". it still shows the filename and metadata so that
users can open the file in the viewer of their choce.
future work could involve showing binary files as Sixel or similar; finding a way to compare large
non-binary files without filling up the screen; or extending the data backends to avoid having to
read the whole file contents into memory.
Previously, `jj git push; jj git push` would tell the user that "No
branches point to the specified revisions.". I found this confusing,
even though strictly speaking it is correct (as the default revset only
considers revisions that haven't been pushed to the remote).
Closes#2241
The error output gets more verbose because all gix error sources are printed.
Maybe we'll need a better formatting, but changing to multi-line output doesn't
look nice either.
Summary: As discussed in Discord, on GitHub, and elsewhere, this change
deprecates the use of `jj merge` and suggests users use `jj new` exclusively
instead. `merge` isn't completely unfit as a name; but we think it obscures
the generality of `new` and we want people to use it instead.
To further drive the bit home, by default, `jj merge` is now hidden. This will
hopefully stop new users from running into it.
Signed-off-by: Austin Seipp <aseipp@pobox.com>
Change-Id: I94938aca9d3e2aa12d1394a5fbc58acce3185b56
Summary: As discussed in Discord, on GitHub, and elsewhere, this change
deprecates the use of `jj checkout` and suggests users use `jj new` exclusively
instead. The verb `checkout` is a relic of a bygone era the — days of RCS
file locking, before 3-way merge — and is not a good, fitting name for the
functionality it provides.
To further drive the bit home, by default, `jj checkout` (and `jj co`) is now
hidden. This will hopefully stop new users from running into it.
Signed-off-by: Austin Seipp <aseipp@pobox.com>
Change-Id: I7a1adfc9168fce1f25cf5d4c4c313304769e41a1
These didn't really need to use `jj checkout`, and it will be deprecated in a
future change anyway. Move them out of there and into `new`.
Ideally this would go into `test_conflicts.rs`, but that exists in `jj-lib`, so
it doesn't have `TestEnvironment` available to it.
Signed-off-by: Austin Seipp <aseipp@pobox.com>
Change-Id: If0173b27ab4d1f6036a4ec632ec77b6824f310c3
