When yank-indent-mode is enabled, yanked (pasted) text is indented based
on the indent rules of the current major mode. It has a
global-yank-indent-mode too which by default excludes a long list of
known indentation sensitive modes with which this approach does not work
very well.
It is based on some random hacky snippets elisp I've been using for over
a decade. Said snippets are themselves based on some random snippets I
found online, and since morphed into the weird monster they had become.
This makes switching between Emacs 29.x and 30.x much easier, as
straight doesn't need to re-build all packages from scratch when the
Emacs version changes.
These macros work more or less like add-to-list, except they will always
leave ELEMENT as the first/last element in the list, while add-to-list
does not modify the list if ELEMENT is already present anywhere in the
list.
This is mostly a helper function for when I've messed around with active
modes in a file buffer a whole bunch, and I just want to revert all
things to the default state of when the file is opened.
Both undo-fu and undo-fu-session are hosted on codeberg, which seems to
be down right now. Hence instead let's pull in these packages from the
mirrors on the emacsmirrors GitGub org.
Use fussy instead of orderless for filtering and scoring/ordering
completion candidates. This seems to overall order results in a much
better way than just orderless.
Technically orderless is still used to filter the candidate list, but
fzf-native is used to score/order the results.
I opted for accepting copilot completions using C-<tab> /
<backtab> (shift+tab) instead of regular tab, as it was often getting in
the way of yasnippet and lsp completion suggestions. This allows a more
explicit acceptance of Copilot suggestions.
Also replace undohist with undo-fu-session.
Overall this seems to yield a more reliable undo history, as undo-fu and
vundo supposedly operate with vanilla emacs undo history state, while
undo-tree supposedly does some custom tweaks to the undo state.
Move away from the whitespace-cleanup-mode package, and instead simply
define our own whitespace-cleanup-on-save-mode minor-mode that uses a
before-save-hook.