home/rc/base/go.kak

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