kakoune/rc/filetype/go.kak

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# https://golang.org/
#
# Detection
# ‾‾‾‾‾‾‾‾‾
hook global BufCreate .*\.go %{
set-option buffer filetype go
}
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook global WinSetOption filetype=go %{
require-module go
set-option window static_words %opt{go_static_words}
# cleanup trailing whitespaces when exiting insert mode
hook window ModeChange pop:insert:.* -group go-trim-indent %{ try %{ execute-keys -draft <a-x>s^\h+$<ret>d } }
hook window InsertChar \n -group go-indent go-indent-on-new-line
hook window InsertChar \{ -group go-indent go-indent-on-opening-curly-brace
hook window InsertChar \} -group go-indent go-indent-on-closing-curly-brace
hook -once -always window WinSetOption filetype=.* %{ remove-hooks window go-.+ }
}
hook -group go-highlight global WinSetOption filetype=go %{
add-highlighter window/go ref go
hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/go }
}
provide-module go %§
# Highlighters
# ‾‾‾‾‾‾‾‾‾‾‾‾
add-highlighter shared/go regions
add-highlighter shared/go/code default-region group
add-highlighter shared/go/back_string region '`' '`' fill string
add-highlighter shared/go/double_string region '"' (?<!\\)(\\\\)*" fill string
add-highlighter shared/go/single_string region "'" (?<!\\)(\\\\)*' fill string
add-highlighter shared/go/comment region /\* \*/ fill comment
add-highlighter shared/go/comment_line region '//' $ fill comment
add-highlighter shared/go/code/ regex %{-?([0-9]*\.(?!0[xX]))?\b([0-9]+|0[xX][0-9a-fA-F]+)\.?([eE][+-]?[0-9]+)?i?\b} 0:value
evaluate-commands %sh{
# Grammar
keywords='break default func interface select case defer go map struct
chan else goto package switch const fallthrough if range type
continue for import return var'
types='bool byte chan complex128 complex64 error float32 float64 int int16 int32
int64 int8 interface intptr map rune string struct uint uint16 uint32 uint64 uint8'
values='false true nil iota'
functions='append cap close complex copy delete imag len make new panic print println real recover'
join() { sep=$2; eval set -- $1; IFS="$sep"; echo "$*"; }
# Add the language's grammar to the static completion list
printf %s\\n "declare-option str-list go_static_words $(join "${keywords} ${attributes} ${types} ${values} ${functions}" ' ')"
# Highlight keywords
printf %s "
add-highlighter shared/go/code/ regex \b($(join "${keywords}" '|'))\b 0:keyword
add-highlighter shared/go/code/ regex \b($(join "${attributes}" '|'))\b 0:attribute
add-highlighter shared/go/code/ regex \b($(join "${types}" '|'))\b 0:type
add-highlighter shared/go/code/ regex \b($(join "${values}" '|'))\b 0:value
add-highlighter shared/go/code/ regex \b($(join "${functions}" '|'))\b 0:builtin
"
}
# Commands
# ‾‾‾‾‾‾‾‾
define-command -hidden go-indent-on-new-line %~
evaluate-commands -draft -itersel %=
# preserve previous line indent
try %{ execute-keys -draft \;K<a-&> }
# indent after lines ending with { or (
try %[ execute-keys -draft k<a-x> <a-k> [{(]\h*$ <ret> j<a-gt> ]
# cleanup trailing white spaces on the previous line
try %{ execute-keys -draft k<a-x> s \h+$ <ret>d }
# align to opening paren of previous line
try %{ execute-keys -draft [( <a-k> \A\([^\n]+\n[^\n]*\n?\z <ret> s \A\(\h*.|.\z <ret> '<a-;>' & }
# copy // comments prefix
try %{ execute-keys -draft \;<c-s>k<a-x> s ^\h*\K/{2,} <ret> y<c-o>P<esc> }
# indent after a switch's case/default statements
try %[ execute-keys -draft k<a-x> <a-k> ^\h*(case|default).*:$ <ret> j<a-gt> ]
# indent after if|else|while|for
try %[ execute-keys -draft \;<a-F>)MB <a-k> \A(if|else|while|for)\h*\(.*\)\h*\n\h*\n?\z <ret> s \A|.\z <ret> 1<a-&>1<a-space><a-gt> ]
=
~
define-command -hidden go-indent-on-opening-curly-brace %[
# align indent with opening paren when { is entered on a new line after the closing paren
try %[ execute-keys -draft -itersel h<a-F>)M <a-k> \A\(.*\)\h*\n\h*\{\z <ret> s \A|.\z <ret> 1<a-&> ]
]
define-command -hidden go-indent-on-closing-curly-brace %[
# align to opening curly brace when alone on a line
try %[ execute-keys -itersel -draft <a-h><a-k>^\h+\}$<ret>hms\A|.\z<ret>1<a-&> ]
]
§