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Diffstat (limited to 'autoload/filetype/nix.kak')
| -rw-r--r-- | autoload/filetype/nix.kak | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/autoload/filetype/nix.kak b/autoload/filetype/nix.kak new file mode 100644 index 0000000..35e5e4e --- /dev/null +++ b/autoload/filetype/nix.kak @@ -0,0 +1,124 @@ +# Nix package manager language +# https://nixos.org/nix/manual/ + +# Detection +# ‾‾‾‾‾‾‾‾‾ + +hook global BufCreate .*[.](nix) %{ + set-option buffer filetype nix +} + +# Initialization +# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾ + +hook global WinSetOption filetype=nix %{ + require-module nix + + hook window ModeChange pop:insert:.* -group nix-trim-indent nix-trim-indent + hook window InsertChar .* -group nix-indent nix-indent-on-char + hook window InsertChar \n -group nix-insert nix-insert-on-new-line + hook window InsertChar \n -group nix-indent nix-indent-on-new-line + + set-option buffer extra_word_chars _ - + hook -once -always window WinSetOption filetype=.* %{ remove-hooks window nix-.+ } +} + +hook -group nix-highlight global WinSetOption filetype=nix %{ + add-highlighter window/nix ref nix + hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/nix } +} + +provide-module nix %§ + +# Highlighters +# ‾‾‾‾‾‾‾‾‾‾‾‾ + +add-highlighter shared/nix regions +add-highlighter shared/nix/code default-region group +# Define strings. They can contain interpolated nix code, +# which itself can contain strings. +# Note that we currently cannot properly support nesting of the same-delimiter strings +# because of https://github.com/mawww/kakoune/issues/1670 +add-highlighter shared/nix/double_string region '"' (?<!\\)(?:\\\\)*" regions +# this is hard one: it is terminated by '', but ''$, ''\* and ''' are escapes. +add-highlighter shared/nix/indent_string region "''" (?<!')(?:''')*''(?![\\'$]) regions +add-highlighter shared/nix/comment1 region '#' '$' fill comment +add-highlighter shared/nix/comment2 region /\* \*/ fill comment + + +#add-highlighter shared/nix/code/ regex "([a-zA-Z_][a-zA-Z0-9-_.]*)\s*([=])" 1:variable +add-highlighter shared/nix/code/ regex "(\b|-)[0-9]*\.?[0-9eE]+\b" 0:value + +add-highlighter shared/nix/double_string/str default-region fill string +add-highlighter shared/nix/double_string/variable region -recurse \{ (?<!\\)(\\\\)*\$\{ \} ref nix +add-highlighter shared/nix/indent_string/str default-region fill string +# FIXME: the opening regex is not ideal. See https://nixos.org/nix/manual/#idm140737317975776 +# It should usually match "${", should match "'''${" (as "'''" is escaped itself), +# but should not match "''${" and "''\${". +# Seems that negative lookbehind semantics is not enough for some complex cases. +add-highlighter shared/nix/indent_string/variable region -recurse \{ (?<![^']'')\$\{ \} ref nix + +add-highlighter shared/nix/code/ regex \b(true|false|null|let|in|with|if|then|else)\b 0:keyword +add-highlighter shared/nix/code/ regex \b(rec)\b\s*\{ 1:keyword +# Those are builtin functions available in global scope. +# They should not be assigned to. +add-highlighter shared/nix/code/ regex '[^.]\s*\b(builtins|inherit|baseNameOf|derivation|dirOf|fetchTarball|import|isNull|map|removeAttrs|throw|toString)\b\s*[^=]' 1:builtin + +add-highlighter shared/nix/code/ regex '\b\s*(\.)\s*\b' 1:operator +add-highlighter shared/nix/code/ regex '[^-a-zA-Z0-9_](-+)' 1:operator +add-highlighter shared/nix/code/ regex '\?' 0:operator +add-highlighter shared/nix/code/ regex '\+\+=?' 0:operator +add-highlighter shared/nix/code/ regex '(\*|/|\+)' 0:operator +add-highlighter shared/nix/code/ regex '!' 0:operator +add-highlighter shared/nix/code/ regex '//=?' 0:operator +add-highlighter shared/nix/code/ regex '[<>]=?\??' 0:operator +add-highlighter shared/nix/code/ regex '(==|!=)' 0:operator +add-highlighter shared/nix/code/ regex '(&&|\|\|)' 0:operator +add-highlighter shared/nix/code/ regex '->' 0:operator +add-highlighter shared/nix/code/ regex \bor\b 0:operator + +# override any operators matched before +# path: +add-highlighter shared/nix/code/ regex '\s\(*(\.?\.?[-A-Za-z0-9/_+.]*/[-A-Za-z0-9/_+.]*)[;?]?' 1:meta +# imported path: +add-highlighter shared/nix/code/ regex <[-A-Za-z0-9/_+.]+> 0:meta +# RFC 2396 URIs can be used without quoting. Strangely, "string" ends URL but ''indented'' one doesn't +# List of prohibited characters was tested manually in nix-repl as it is not properly documented. +add-highlighter shared/nix/code/ regex '([^:/?#\s]+):([^#(){}\[\]";`|\s\\]+)' 0:string + +# Commands +# ‾‾‾‾‾‾‾‾ + +define-command -hidden nix-trim-indent %{ + # remove trailing white spaces + try %{ execute-keys -draft -itersel x s \h+$ <ret> d } +} + +define-command -hidden nix-indent-on-char %< + evaluate-commands -draft -itersel %< + # align closer token to its opener when alone on a line + try %/ execute-keys -draft <a-h> <a-k> ^\h+[\]}]$ <ret> m s \A|.\z <ret> 1<a-&> / + > +> + +define-command -hidden nix-insert-on-new-line %< + evaluate-commands -draft -itersel %< + # copy // comments prefix and following white spaces + try %{ execute-keys -draft k x s ^\h*\K#\h* <ret> y gh j P } + > +> + +define-command -hidden nix-indent-on-new-line %< + evaluate-commands -draft -itersel %< + # preserve previous line indent + try %{ execute-keys -draft <semicolon> K <a-&> } + # filter previous line + try %{ execute-keys -draft k : nix-trim-indent <ret> } + # indent after lines beginning / ending with opener token + try %_ execute-keys -draft k x <a-k> ^\h*[[{]|[[{]$ <ret> j <a-gt> _ + # deindent closer token(s) when after cursor + try %_ execute-keys -draft x <a-k> ^\h*[}\]] <ret> gh / [}\]] <ret> m <a-S> 1<a-&> _ + > +> + +§ |