Bugs fixed

• apheleia-formatters-indent did not handle yaml-ts-mode; added with same behaviour as yaml-mode
• apheleia-formatters-indent did not handle js-json-mode; added with same behaviour as json-mode
• A formatter that adds indentation while point is at the end of the line would sometimes leave point at the wrong position (#362).

Formatters

• hurlfmt for hurl files.
• csharpier for C#.
• taplo for TOML.
• styler for R.

Enhancements

• Black will respect configuration in pyproject.toml when run via Apheleia.

Bugs fixed

• A formatter that moves a line to the top of the file would sometimes place it as the second line instead (#299).
• Fix invoking the diff command on Windows by always passing the --text flag.

Formatters

• Format Bazel files according to their type

Bugs fixed

• $PATH was not correctly respected for some remote executables (#341).

Formatters

• cljstyle for clojure, clojurescript, edn files.
• biome (#339).
• gdformat for gdscript (#342).
• prettier-json-stringify (#183).
• nix-ts-mode buffers are now formatted with nixfmt like nix-mode buffers are.
• Fix foumolu arguements
• Both haskell-mode and the newly added haskell-ts-mode buffers are formatted with fourmolu

Internal

• You can run the formatter tests locally with podman instead of docker now, if you want. Export USE_PODMAN=1 (#343).

Features

• New user option apheleia-skip-functions, like apheleia-inhibit-functions but for skipping a formatter run even when apheleia-mode is generally enabled (#317).
• ocp-indent for Ocaml (#306).

Formatters

• vfmt for vlang (#324).
• typstyle for typst (#313).
• rubocop changed to use -a instead of deprecated --auto-correct (#316).
• snakefmt official formatter for Snakemake (#307).
• gleam official formatter for gleam (#325)
• zig fmt official formatter for zig (#327).

Bugs fixed

• apheleia-npx would use an incorrect path for the Yarn PnP ESM loader (#301).
• apheleia-npx did not correctly guard against word splitting and would fail when directory names contained spaces (#301).
• apheleia-npx was sometimes not able to find formatters in a Yarn PnP project if there was also a node_modules folder at the root of the project (#301).
• Ormolu is now passed the --stdin-input-file argument, which has become required (#312).
• mix format is now passed the --stdin-filename argument which is required in some cases. The version of Mix is autodetected and this option is only passed when it is supported (#319).
• mix format is now run with MIX_QUIET to supress compilation output (#326)
• Beancount files are formatted without an error (#309).

Internal

• Improvements to formatter test framework, it is now possible to write tests that have additional data files (#301).

Changes

• Custom Emacs Lisp formatting functions have the option to report an error asynchronously by invoking their callback with an error as argument. Passing nil as argument indicates that there was no error, as before. The old calling convention is still supported for backwards compatibility, and errors can also be reported by throwing, as normal. Implemented in #204.

Features

• New user option apheleia-mode-predicates. The default value handles mhtml-mode correctly by always using whatever formatter you have configured for that mode, rather than using css-mode, html-mode, etc formatters depending on the position of point (#302).

Enhancements

• There is a new keyword argument to apheleia-format-buffer which is a more powerful callback that is guaranteed to be called except in cases of synchronous nonlocal exit. See the docstring for details. The old callback, which is only invoked on success and receives no information about errors, is still supported and will continue to be called if provided. See #204.

Formatters

Bugs fixed

• The point alignment algorithm, which has been slightly wrong since 2019, has been fixed to more correctly use dynamic programming to maintain the position of point. Also, some cases of a nil pointer error during point alignment have been fixed (#290).
• apheleia-indent-lisp-buffer updated to apply local variables after calling major-mode. Also includes setting for indent-tabs-mode (#286).
• Formatter scripts will now work on Windows if Emacs can find the executable defined in the shebang.

Internal

• Major internal refactoring has occurred to make it possible to write integration tests against Apheleia. This should improve future stability but could have introduced some bugs in the initial version. See #204.
• Some debugging log messages have changed, see #204.

Enhancements

• Use perltidy as default formatter for cperl-mode (#260).
• The perltidy formatter now supports Emacs indentation and line length settings (#261).
• Indent level is now determined for graphql-mode, html-mode, ruby-mode, ruby-ts-mode, svelte-mode, and yaml-mode (#258).
• Indent level support when using yq to format JSON, XML, and YAML (#259).

Formatters

• dprint for various (depending on installed plugins) (#209).
• js-beautify for JavaScript, JSON, HTML and CSS (#229)
• python3-json for JSON (#257).
• robotidy for Robot Framework files (#263).
• ruff-isort for Python imports using ruff (#279).
• denofmt for js, jsx, ts, tsx, json, jsonc, md files. (#264)
• docformatter for Python docstrings (#267)
• cljfmt for clojure, clojurescript, edn files. (#271)
• Stylua is used now in lua-ts-mode as well as just lua-mode, by default (#275).
• treefmt for project configured formatters ([#280]).
• pyang for YANG (#282).

Bugs fixed

• Apheleia sometimes failed to determine indent level from Emacs settings even when configured to do so. This is fixed (#274).

Breaking changes

• The order of entries in apheleia-mode-alist is no longer as important. Specifically, if two different mode entries in apheleia-mode-alist match the current buffer, then the more specific one is used, even if it comes later. This is generally speaking what you would expect to happen. For other cases, such as ordering of regex entries, or modes versus regexes, order is respected as before ([#206]).
• Disable formatting of go module files with gofmt. This was never supported (#214).
• Remove support for Emacs 26 (#215).
• Emacs will infer indentation configuration from your major mode and, by default, supply this configuration to formatters, to ensure consistency between how you have Emacs configured and how your formatter is configured. You can disable this by setting apheleia-formatters-respect-indent-level to nil (#167, #208).

Enhancements

• Use the prettier-json formatter for js-json-mode (#209).
• Prettier is now enabled in svelte-mode.
• More tree-sitter based major modes have been added to apheleia-mode-alist ([#191]).
• All marks (the current (mark), and the mark-ring) are now adjusted, alongside (point) (#197).
• Built-in formatters now use a new "apheleia-npx" built-in script instead of the legacy npx keyword. The effect of the new script is the same, except that it also works with Yarn PNP projects as well as node_modules style projects ([#200]).
• Autoload the apheleia-goto-error command (#215).
• Use lisp-indent as default formatter for emacs-lisp-mode (#223)
• Use hclfmt for formatting hashicorp HCL files (#231)
• The mix format formatter will respect .formatter.exs files even if they are present in a parent directory rather than the same directory as the file being formatted (#232).

Internal Changes

• Refactored the organisation of the apheleia package for ease of understanding and usability (#215).
• The new scripts/pnp-bin.js script is standalone minified nodejs built from the pnp-bin repo, extracted from apheleia PR [#200].
• Test environment bumped from Ubuntu 20.04 to 22.04 (#242).
• The function apheleia--format-after-save was renamed to apheleia-format-after-save. This is only called out explicitly because it was added to after-save-hook so customization that assumed this behavior might break.

Bugs fixed

• ktlint would emit log messages into its stdout when formatting, and these would get spliced into the source file. This has been fixed by suppressing all logs from ktlint.
• Disable colorized output with the jq formatter (#213).
• Fixed apheleia skipped running a formatter on a remote when it isn't installed locally (#215).
• Fixed clang-format formatter did not respect remote file-name component for the assumed file-name (#215).
• Always supply --stdin-filepath to Prettier to allow it to pick up the correct settings from project-level config files (#253).

Formatters

• asmfmt for assembly (#168).
• astyle for C (#169).
• beautysh for shell scripts (#170)
• buildifier for Bazel Build (#171).
• cmake-format for CMake (#172).
• fourmolu for haskell
• gawk for awk (#187).
• hclfmt for HCL (#231)
• html-tidy for HTML/XML (#173).
• jq for JSON (#174).
• ormolu for haskell.
• perltidy for perl (#175).
• pgformatter for SQL (#247)
• purs-tidy for PureScript (#182).
• rubocop for ruby (#176).
• ruby-standard for ruby ([#201])
• ruff for python (#236)
• rufo for Ruby (#177).
• xmllint for XML ([#251]).
• yapf for Python (#196)
• yq for YAML, JSON, CSV, TSV, XML and .properties ([#250]).

Features

• You can use apheleia-inhibit as a file-local variable to disable Apheleia turning on automatically for a file or directory. You can also use apheleia-inhibit-functions to configure custom logic to prevent Apheleia from turning on automatically under certain circumstances, without needing to adjust file-local variables. See #134 and #138.
• apheleia-mode lighter is now customizable (#143).

Changes

• shfmt is no longer enabled by default in order to prevent corruption of zsh scripts. Re-enabling shfmt in a future release is intended, but depends on further implementation work in Apheleia to only enable it for supported shells.

Enhancements

• Emacs 29's tree-sitter-based major modes have been added to apheleia-mode-alist (#145, #148, [#151], [#155]).

Bugs fixed

• If a formatter exited with a zero exit code when being killed by a signal (even though that is really weird behavior and arguably a bug in the formatter), then if a file was saved multiple times in quick succession, its contents could be erased and replaced with an error message from the formatter. This has been fixed. See #131 for more details.
• Npx commands in apheleia-formatters are not overwritten when expanding binary path to node_modules directory (#152).
• Error is no longer reported when the first element of a command is an evaluable form rather than a literal string ([#156]).

Formatters

• crystal tool format for Crystal (#137).
• gofumpt and goimports for Go (#147).
• caddy fmt for Caddyfile, used by Caddy 2 (#136)

Enhancements

• shfmt uses 4 spaces instead of tabs by default.
• Formatters using 'filepath (OCamlFormat and Prettier) are no longer prevented from running on a modified buffer (#109, #110).
• Buffer content is now always passed to formatters using a pipe. This fixes issues with formatters that behave differently when receiving input on stdin versus being run on a tty (#119).
• Prettier now specifies --parser argument explicitly, so it will work properly even when the name of the file does not match what Prettier expects (e.g. .yamllint will be formatted as YAML by Prettier as long as it is in yaml-mode). See #103.

Bugs fixed

• When a formatter has a bug and fails to return anything on stdout (e.g. scalafmt), do not erase the buffer (#116).
• Fix Error: "Selecting deleted buffer" which occurred in some circumstances due to a race condition (#123).
• Apheleia does not delete the contents of narrowed buffers when running. Instead, it is disabled in narrowed buffers. Support for narrowed buffers may be added in future but it has never been correctly supported in the past (see #43). More at #124, #127.
• Currently, when a formatter invoked via a process isn't installed correctly; it throws an error. It doesn't make sense to attempt to format if we can't find the correct formatter, so instead formatting is only attempted when the formatter is found. #126
• clang-format doesn't handle filenames correctly by default. Support for guessing the flags from first the file name then the major mode in the case of a temporary buffer was added in #128
• Fix handling of formatters using inplace in some circumstances (#132).

Formatters

• elm-format for Elm (#100).
• bean-format for Beancount (#101).
• stylua for Lua (#105).
• Native Emacs indentation of Emacs Lisp code as a formatter (#102). This is not enabled by default but you can enable it by adding (emacs-lisp-mode . lisp-indent) to apheleia-mode-alist

Bugfixes

• Prettier supports SCSS instead of SASS. The original support for SASS in Apheleia was a bug because Prettier actually never had support for SASS in the first place, so Apheleia would have failed anyway on trying to format a SASS file.

Breaking changes

• The arguments of formatters defined as Elisp functions has changed. A formatter function should now be a cl-defun taking key-value arguments with support for more keys being provided on a later apheleia release (by including &allow-other-keys in the parameter list). For a list of provided arguments see apheleia--run-formatter-function.
• Emacs 25 is no longer supported.

Enhancements

• Ocamlformat is now used in caml-mode in addition to tuareg-mode (#94).

Formatters

• dart-format for Dart (#89).
• phpcs for PHP (#87).
• ktlint for Kotlin (#97).
• nixfmt for Nix (#98).

Features

• Support remote files and buffers that were opened through TRAMP (#33).