v0.8.0

### Breaking changes

* The `jujutsu` and `jujutsu-lib` crates were renamed to `jj-cli` and `jj-lib`,
  respectively.

* The `ui.oplog-relative-timestamps` option has been removed. Use the
  `format_time_range()` template alias instead. For details, see
  [the documentation](docs/config.md).

* Implicit concatenation of template expressions has been disabled. Use
  `++` operator, `concat()`, or `separate()` function instead.
  Example: `description ++ "\n"`

* `jj git push` will consider pushing the parent commit only when the
  current commit has no content and no description, such as right after
  a `jj squash`.

* The minimum supported Rust version (MSRV) is now 1.64.0.

* The `heads()` revset function was split up into two functions. `heads()`
  without arguments is now called `visible_heads()`. `heads()` with one argument
  is unchanged.

* The `ui.default-revset` config was renamed to `revsets.log`.

* The `jj sparse` command was split up into `jj sparse list` and
  `jj sparse set`.

* `jj hide` (alias for `jj abandon`) is no longer available. Use `jj abandon`
  instead.

* `jj debug completion`, `jj debug mangen` and `jj debug config-schema` have
  been moved from `jj debug` to `jj util`.

* `jj` will no longer parse `br` as a git_ref `refs/heads/br` when a branch `br`
  does not exist but the git_ref does (this is rare). Use `br@git` instead.

* `jj git fetch` will no longer import unrelated branches from the underlying
  Git repo.

### New features

* `jj git push --deleted` will remove all locally deleted branches from the remote.

* `jj restore` without `--from` works correctly even if `@` is a merge
  commit.

* `jj rebase` now accepts multiple `-s` and `-b` arguments. Revsets with
  multiple commits are allowed with `--allow-large-revsets`.

* `jj git fetch` now supports a `--branch` argument to fetch some of the
  branches only.

* `jj config get` command allows retrieving config values for use in scripting.

* `jj config set` command allows simple config edits like
  `jj config set --repo user.email "somebody@example.com"`

* Added `ui.log-word-wrap` option to wrap `jj log`/`obslog`/`op log` content
  based on terminal width. [#1043](https://github.com/martinvonz/jj/issues/1043)

* Nodes in the (text-based) graphical log output now use a `◉` symbol instead
  of the letter `o`. The ASCII-based graph styles still use `o`.

* Commands that accept a diff format (`jj diff`, `jj interdiff`, `jj show`,
  `jj log`, and `jj obslog`) now accept `--types` to show only the type of file
  before and after.

* `jj describe` now supports `--reset-author` for resetting a commit's author
  to the configured user. `jj describe` also gained a `--no-edit` option to
  avoid opening the editor.

* Added `latest(x[, n])` revset function to select the latest `n` commits.

* Added `conflict()` revset function to select commits with conflicts.

* `jj squash` AKA `jj amend` now accepts a `--message` option to set the
  description of the squashed commit on the command-line.

* The progress display on `jj git clone/fetch` now includes the downloaded size.

* The formatter now supports a "default" color that can override another color
  defined by a parent style.

* `jj obslog` and `jj log` now show abandoned commits as hidden.

* `jj git fetch` and `jj git push` will now use the single defined remote even
  if it is not named "origin".

* `jj git push` now accepts `--branch` and `--change` arguments together.

* `jj git push` now accepts a `-r/--revisions` flag to specify revisions to
  push. All branches pointing to any of the specified revisions will be pushed.
  The flag can be used together with `--branch` and `--change`.

* `jj` with no subcommand now defaults to `jj log` instead of showing help. This
  command can be overridden by setting `ui.default-command`.

* Description tempfiles created via `jj describe` now have the file extension
  `.jjdescription` to help external tooling detect a unique filetype.

* The shortest unique change ID prefixes and commit ID prefixes in `jj log` are
  now shorter within the default log revset. You can override the default by
  setting the `revsets.short-prefixes` config to a different revset.

* The last seen state of branches in the underlying git repo is now presented by
  `jj branch list`/`jj log` as a remote called `git` (e.g. `main@git`). They can
  also be referenced in revsets. Such branches exist in colocated repos or if
  you use `jj git export`.

* The new `jj chmod` command allows setting or removing the executable bit on
  paths. Unlike the POSIX `chmod`, it works on Windows, on conflicted files, and
  on arbitrary revisions. Bits other than the executable bit are not planned to
  be supported.

* `jj sparse set` now accepts an `--edit` flag which brings up the `$EDITOR` to
  edit sparse patterns.

* `jj branch list` can now be filtered by revset.

* Initial support for the Watchman filesystem monitor. Set
  `core.fsmonitor = "watchman"` in your repo to enable.

### Fixed bugs

* Modify/delete conflicts now include context lines
  [#1244](https://github.com/martinvonz/jj/issues/1244).

* It is now possible to modify either side of a modify/delete conflict (any
  change used to be considered a resolution).

* Fixed a bug that could get partially resolved conflicts to be interpreted
  incorrectly.

* `jj git fetch`: when re-adding a remote repository that had been previously
  removed, in some situations the remote branches were not recreated.

* `jj git remote rename`: the git remote references were not rewritten with
  the new name. If a new remote with the old name and containing the same
  branches was added, the remote branches may not be recreated in some cases.

* `jj workspace update-stale` now snapshots the working-copy changes before
  updating to the new working-copy commit.

* It is no longer allowed to create branches at the root commit.

* `git checkout` (without using `jj`) in colocated repo no longer abandons
  the previously checked-out anonymous branch.
  [#1042](https://github.com/martinvonz/jj/issues/1042).

* `jj git fetch` in a colocated repo now abandons branches deleted on the
  remote, just like in a non-colocated repo.
  [#864](https://github.com/martinvonz/jj/issues/864)

* `jj git fetch` can now fetch forgotten branches even if they didn't move on
  the remote.
  [#1714](https://github.com/martinvonz/jj/pull/1714)
  [#1771](https://github.com/martinvonz/jj/pull/1771)

* It is now possible to `jj branch forget` deleted branches.
  [#1537](https://github.com/martinvonz/jj/issues/1537)

* Fixed race condition when assigning change id to Git commit. If you've
  already had unreachable change ids, run `jj debug reindex`.
  [#924](https://github.com/martinvonz/jj/issues/924)

* Fixed false divergence on racy working-copy snapshots.
  [#697](https://github.com/martinvonz/jj/issues/697),
  [#1608](https://github.com/martinvonz/jj/issues/1608)

* In colocated repos, a bug causing conflicts when undoing branch moves (#922)
  has been fixed. Some surprising behaviors related to undoing `jj git push` or
  `jj git fetch` remain.

### Contributors

Thanks to the people who made this release happen!

* Aaron Bull Schaefer (@elasticdog)
* Anton Bulakh (@necauqua)
* Austin Seipp (@thoughtpolice)
* Benjamin Saunders (@Ralith)
* B Wilson (@xelxebar)
* Christophe Poucet (@poucet)
* David Barnett (@dbarnett)
* Glen Choo (@chooglen)
* Grégoire Geis (@71)
* Ilya Grigoriev (@ilyagr)
* Isabella Basso (@isinyaaa)
* Kevin Liao (@kevincliao)
* Martin von Zweigbergk (@martinvonz)
* mlcui (@mlcui-google)
* Samuel Tardieu (@samueltardieu)
* Tal Pressman (@talpr)
* Vamsi Avula (@avamsi)
* Waleed Khan (@arxanas)
* Yuya Nishihara (@yuja)