Release Apheleia 2.0 · radian-software/apheleia

Breaking changes

The interface to apheleia-format-buffer has changed. You now pass in the symbol of a formatter from apheleia-formatters (or a list of them) rather than the actual command. This change improves the ability of Apheleia to report useful error messages and logging.
Stdout and stderr buffers are no longer retained after running a formatter. Instead, the stderr is appended into an *apheleia-cmdname-log* buffer if it fails, or unconditionally if the new user option apheleia-log-only-errors is set to nil. See #64, #65. The log buffer is not hidden by default, unlike the old stdout and stderr buffers, but this can be changed with the new user option apheleia-hide-log-buffers. Also, the log shows all command output rather than just the latest run. You can add further customizations using the new hook apheleia-formatter-exited-hook (#69).

Apheleia can now format buffers that do not have an underlying file (#52).
You can now use a Lisp function as a formatter, by providing a symbol or lambda in apheleia-formatters rather than a list of strings (#62).
Formatters that operate on files in place are now supported, by using the symbol inplace in an entry on apheleia-formatters to stand in for the name of a temporary file that will be modified in place by the formatter (#23).

The buffer-local variable apheleia-formatter is now marked as safe (#74). This allows you to configure the formatter that Apheleia will use in a file-local variable. Note: only formatters already declared in apheleia-formatters can be used; this does not allow arbitrary shell commands to be specified in file-local variables.

Allow running the same formatter in multiple buffers in parallel (#64, #65). Previously, when saving a number of files at the same time, the contents of those buffers could be corrupted by a race condition.
In some circumstances the error wrong-type-argument bufferp nil could be reported when running certain formatters under Apheleia. This has been fixed.
Rustfmt is no longer passed the --unstable-features and --skip-children flags, since they are not available on all versions of Rustfmt (#69).
When a formatter cannot be found, orphaned stderr processes are no longer created and left around forever (#47).
Apheleia no longer resets the major mode to its default value when formatting a buffer. This was never intended and the bug has now been fixed (#58).

isort is passed different arguments so as not to trigger a crash that appears to be related to the --stdout flag.
latexindent now has its log file disabled so as to avoid cluttering the working directory.
ocamlformat is now configured to work even outside of detected projects.