79 lines
1.7 KiB
VimL
79 lines
1.7 KiB
VimL
" Vim indent file
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" Language: nginx.conf
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" Maintainer: Chris Aumann <me@chr4.org>
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" Last Change: 2022 Dec 01
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" Only load this indent file when no other was loaded.
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if exists('b:did_indent')
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finish
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endif
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let b:did_indent = 1
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setlocal indentexpr=GetNginxIndent()
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setlocal indentkeys=0{,0},0#,!^F,o,O
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let b:undo_indent = 'setl inde< indk<'
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" Only define the function once.
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if exists('*GetNginxIndent')
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finish
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endif
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function GetNginxIndent() abort
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let plnum = s:PrevNotAsBlank(v:lnum - 1)
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" Hit the start of the file, use zero indent.
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if plnum == 0
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return 0
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endif
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let ind = indent(plnum)
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" Add a 'shiftwidth' after '{'
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if s:AsEndWith(getline(plnum), '{')
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let ind = ind + shiftwidth()
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end
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" Subtract a 'shiftwidth' on '}'
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" This is the part that requires 'indentkeys'.
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if getline(v:lnum) =~ '^\s*}'
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let ind = ind - shiftwidth()
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endif
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let pplnum = s:PrevNotAsBlank(plnum - 1)
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if s:IsLineContinuation(plnum)
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if !s:IsLineContinuation(pplnum)
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let ind = ind + shiftwidth()
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end
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else
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if s:IsLineContinuation(pplnum)
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let ind = ind - shiftwidth()
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end
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endif
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return ind
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endfunction
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" Find the first line at or above {lnum} that is non-blank and not a comment.
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function s:PrevNotAsBlank(lnum) abort
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let lnum = prevnonblank(a:lnum)
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while lnum > 0
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if getline(lnum) !~ '^\s*#'
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break
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endif
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let lnum = prevnonblank(lnum - 1)
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endwhile
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return lnum
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endfunction
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" Check whether {line} ends with {pat}, ignoring trailing comments.
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function s:AsEndWith(line, pat) abort
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return a:line =~ a:pat . '\m\s*\%(#.*\)\?$'
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endfunction
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function s:IsLineContinuation(lnum) abort
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return a:lnum > 0 && !s:AsEndWith(getline(a:lnum), '[;{}]')
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endfunction
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