The function now returns an iterator over `Result`s, matching
`Operation::parents()`.
I updated callers to also propagate the error where it was trivial.
We do a 3-way merge of repo views in a few different
scenarios. Perhaps the most obvious one is when merging concurrent
operations. Another case is when undoing an operation.
One step of the 3-way repo view merge is to find which added commits
are rewrites of which removed commits (by comparing change IDs). With
the high commit rate in the Google repo (combined with storing the
commits on a server), this step can get extremely slow.
This patch adds a hack to disable the slow step when using a
non-standard `Index` implementation. The Google index is the only
non-standard implementation I'm aware of, so I don't think this will
affect anyone else. The patch is also small enough that I don't think
it will cause much maintenance overhead for the project.
When using `ui.color = "debug"`, changes in the output style
additionally include delimiters << and >>, as well as all active labels
at this point separated by ::. The output is otherwise unformatted and
the delimiters and labels inherit the style of the content they apply
to.
parse_function_argument_to_file/string_pattern() functions aren't moved.
They are more like functions that transform parsed tree to intermediate
representation.
I'm planning to rewrite the parser in a similar way to fileset/template parsing,
and the revset_parser module will host functions and types for the first stage.
I haven't started the rewrite, but it seems good to split the revset module
even if we reject the idea.
Not all "branch list --all-remotes" callers are replaced because I'm going to
make get_branch_output() suppress hints by default, and there should be tests
for the hints.
This is more consistent with the other method and it makes some extension operations easier, by giving access to the OpStore and other relevant context for custom index extensions.
This also means "all:" is allowed in default revsets (such as "revsets.log"),
but that seems okay. In revset aliases, "all:" isn't allowed because aliases
may be expanded to sub-expression position.
Closes#3654
Perhaps, this can be used to generate parsable branches list.
The hint for deleted branches isn't migrated to the template. I'm thinking of
moving it out of the loop and printed once at the end. If we want to generate
a hint in template, we'll probably need local_ref.tracking_remote_refs(), etc.
that return a list of RefNames.
Perhaps, this make it a bit clearer when "deleted" local branches should be
displayed. In practice, this change is noop since remote_ref.target should
never be absent.
More tests will be added later as "branch list" templates.
In "log" template, we might want to see the number of "local" commits ahead
of any tracked remotes. It can be implemented later in a similar way (or as a
nested remote_refs list.)
Because template is declarative language, and is evaluated as a tree, there
will be multiple copies of the same RefName object. This patch allows us to
cache ahead/behind counts which will be lazily calculated.
We'll probably add binary comparison operators at some point, but this patch
also adds size_hint.zero() method. Otherwise, we'll have to write
"if(x.upper() && x.upper() == 0, ..)" to deal with None.
The resulting "branch list" template will look like:
```
separate(", ",
if(!ref.tracking_ahead_count().zero(),
if(ref.tracking_ahead_count().exact(),
"ahead by " ++ ref.tracking_ahead_count().exact() ++ " commits",
"ahead by at least " ++ ref.tracking_ahead_count().lower() ++ " commits")),
if(!ref.tracking_behind_count().zero(),
if(ref.tracking_behind_count().exact(),
"behind by " ++ ref.tracking_behind_count().exact() ++ " commits",
"behind by at least " ++ ref.tracking_behind_count().lower() ++ " commits")),
)
```
In order to port "branch list" to template, we need to somehow represent
revset.count_estimate() result as a template property. I'm going to add
SizeHint template type for that, and its .upper() and .exact() methods will
have to return optional integers.
Fortunately, the Integer type has no implicit conversion to bool, so
"if(optional_integer, ..)" is not ambiguous.
This is a remainder of the previous refactoring series. into_template() could be
implemented as a non-extension method, which allows us to get rid of .clone()
from Literal property extraction. However, there wasn't measurable difference.
Let's not try to overly optimize things. It's probably simpler to switch to
Rc<str> if .clone() really matters.
This is instead of https://github.com/martinvonz/jj/pull/3292, which would make
`diffedit3` built into `jj`. I still have some hope of eventually making
`diffedit3` into the default diff editor that is available without any
configuration, which probably requires building it into `jj`, but this may not
happen, and it wouldn't hurt to test `diffedit3` first. Some examples of
concerns (see also the discussion in that PR):
- It is only a guess on my part that this would make a good default. The editor
might not be polished enough, and most users are not used to 3-pane diff
editing. I think most users would like it if they tried it, but this might be
plain wrong.
- There are concerns about adding a heavyweight dependency on `jj`. While I
tried to make it as lightweight as possible, it still unavoidably includes a web
server.
- There may be ways to bundle `diffedit3` with `jj` without combining them in a
single binary.
