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+" Vim indent file
+" Language: Shell Script
+" Maintainer: Christian Brabandt <cb@256bit.org>
+" Original Author: Nikolai Weibull <now@bitwi.se>
+" Previous Maintainer: Peter Aronoff <telemachus@arpinum.org>
+" Latest Revision: 2019-10-24
+" License: Vim (see :h license)
+" Repository: https://github.com/chrisbra/vim-sh-indent
+" Changelog:
+" 20190726 - Correctly skip if keywords in syntax comments
+" (issue #17)
+" 20190603 - Do not indent in zsh filetypes with an `if` in comments
+" 20190428 - De-indent fi correctly when typing with
+" https://github.com/chrisbra/vim-sh-indent/issues/15
+" 20190325 - Indent fi; correctly
+" https://github.com/chrisbra/vim-sh-indent/issues/14
+" 20190319 - Indent arrays (only zsh and bash)
+" https://github.com/chrisbra/vim-sh-indent/issues/13
+" 20190316 - Make use of searchpairpos for nested if sections
+" fixes https://github.com/chrisbra/vim-sh-indent/issues/11
+" 20190201 - Better check for closing if sections
+" 20180724 - make check for zsh syntax more rigid (needs word-boundaries)
+" 20180326 - better support for line continuation
+" 20180325 - better detection of function definitions
+" 20180127 - better support for zsh complex commands
+" 20170808: - better indent of line continuation
+" 20170502: - get rid of buffer-shiftwidth function
+" 20160912: - preserve indentation of here-doc blocks
+" 20160627: - detect heredocs correctly
+" 20160213: - detect function definition correctly
+" 20160202: - use shiftwidth() function
+" 20151215: - set b:undo_indent variable
+" 20150728: - add foreach detection for zsh
+
+if exists("b:did_indent")
+ finish
+endif
+let b:did_indent = 1
+
+setlocal indentexpr=GetShIndent()
+setlocal indentkeys+=0=then,0=do,0=else,0=elif,0=fi,0=esac,0=done,0=end,),0=;;,0=;&
+setlocal indentkeys+=0=fin,0=fil,0=fip,0=fir,0=fix
+setlocal indentkeys-=:,0#
+setlocal nosmartindent
+
+let b:undo_indent = 'setlocal indentexpr< indentkeys< smartindent<'
+
+if exists("*GetShIndent")
+ finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+let s:sh_indent_defaults = {
+ \ 'default': function('shiftwidth'),
+ \ 'continuation-line': function('shiftwidth'),
+ \ 'case-labels': function('shiftwidth'),
+ \ 'case-statements': function('shiftwidth'),
+ \ 'case-breaks': 0 }
+
+function! s:indent_value(option)
+ let Value = exists('b:sh_indent_options')
+ \ && has_key(b:sh_indent_options, a:option) ?
+ \ b:sh_indent_options[a:option] :
+ \ s:sh_indent_defaults[a:option]
+ if type(Value) == type(function('type'))
+ return Value()
+ endif
+ return Value
+endfunction
+
+function! GetShIndent()
+ let curline = getline(v:lnum)
+ let lnum = prevnonblank(v:lnum - 1)
+ if lnum == 0
+ return 0
+ endif
+ let line = getline(lnum)
+
+ let pnum = prevnonblank(lnum - 1)
+ let pline = getline(pnum)
+ let ind = indent(lnum)
+
+ " Check contents of previous lines
+ " should not apply to e.g. commented lines
+ if line =~ '^\s*\%(if\|then\|do\|else\|elif\|case\|while\|until\|for\|select\|foreach\)\>' ||
+ \ (&ft is# 'zsh' && line =~ '^\s*\<\%(if\|then\|do\|else\|elif\|case\|while\|until\|for\|select\|foreach\)\>')
+ if !s:is_end_expression(line)
+ let ind += s:indent_value('default')
+ endif
+ elseif s:is_case_label(line, pnum)
+ if !s:is_case_ended(line)
+ let ind += s:indent_value('case-statements')
+ endif
+ " function definition
+ elseif s:is_function_definition(line)
+ if line !~ '}\s*\%(#.*\)\=$'
+ let ind += s:indent_value('default')
+ endif
+ " array (only works for zsh or bash)
+ elseif s:is_array(line) && line !~ ')\s*$' && (&ft is# 'zsh' || s:is_bash())
+ let ind += s:indent_value('continuation-line')
+ " end of array
+ elseif curline =~ '^\s*)$'
+ let ind -= s:indent_value('continuation-line')
+ elseif s:is_continuation_line(line)
+ if pnum == 0 || !s:is_continuation_line(pline)
+ let ind += s:indent_value('continuation-line')
+ endif
+ elseif s:end_block(line) && !s:start_block(line)
+ let ind = indent(lnum)
+ elseif pnum != 0 &&
+ \ s:is_continuation_line(pline) &&
+ \ !s:end_block(curline) &&
+ \ !s:is_end_expression(curline)
+ " only add indent, if line and pline is in the same block
+ let i = v:lnum
+ let ind2 = indent(s:find_continued_lnum(pnum))
+ while !s:is_empty(getline(i)) && i > pnum
+ let i -= 1
+ endw
+ if i == pnum
+ let ind += ind2
+ else
+ let ind = ind2
+ endif
+ endif
+
+ let pine = line
+ " Check content of current line
+ let line = curline
+ " Current line is a endif line, so get indent from start of "if condition" line
+ " TODO: should we do the same for other "end" lines?
+ if curline =~ '^\s*\%(fi\);\?\s*\%(#.*\)\=$'
+ let ind = indent(v:lnum)
+ let previous_line = searchpair('\<if\>', '', '\<fi\>\zs', 'bnW', 'synIDattr(synID(line("."),col("."), 1),"name") =~? "comment\\|quote"')
+ if previous_line > 0
+ let ind = indent(previous_line)
+ endif
+ elseif line =~ '^\s*\%(then\|do\|else\|elif\|done\|end\)\>' || s:end_block(line)
+ let ind -= s:indent_value('default')
+ elseif line =~ '^\s*esac\>' && s:is_case_empty(getline(v:lnum - 1))
+ let ind -= s:indent_value('default')
+ elseif line =~ '^\s*esac\>'
+ let ind -= (s:is_case_label(pine, lnum) && s:is_case_ended(pine) ?
+ \ 0 : s:indent_value('case-statements')) +
+ \ s:indent_value('case-labels')
+ if s:is_case_break(pine)
+ let ind += s:indent_value('case-breaks')
+ endif
+ elseif s:is_case_label(line, lnum)
+ if s:is_case(pine)
+ let ind = indent(lnum) + s:indent_value('case-labels')
+ else
+ let ind -= (s:is_case_label(pine, lnum) && s:is_case_ended(pine) ?
+ \ 0 : s:indent_value('case-statements')) -
+ \ s:indent_value('case-breaks')
+ endif
+ elseif s:is_case_break(line)
+ let ind -= s:indent_value('case-breaks')
+ elseif s:is_here_doc(line)
+ let ind = 0
+ " statements, executed within a here document. Keep the current indent
+ elseif match(map(synstack(v:lnum, 1), 'synIDattr(v:val, "name")'), '\c\mheredoc') > -1
+ return indent(v:lnum)
+ elseif s:is_comment(line) && s:is_empty(getline(v:lnum-1))
+ return indent(v:lnum)
+ endif
+
+ return ind > 0 ? ind : 0
+endfunction
+
+function! s:is_continuation_line(line)
+ " Comment, cannot be a line continuation
+ if a:line =~ '^\s*#'
+ return 0
+ else
+ " start-of-line
+ " \\ or && or || or |
+ " followed optionally by { or #
+ return a:line =~ '\%(\%(^\|[^\\]\)\\\|&&\|||\||\)' .
+ \ '\s*\({\s*\)\=\(#.*\)\=$'
+ endif
+endfunction
+
+function! s:find_continued_lnum(lnum)
+ let i = a:lnum
+ while i > 1 && s:is_continuation_line(getline(i - 1))
+ let i -= 1
+ endwhile
+ return i
+endfunction
+
+function! s:is_function_definition(line)
+ return a:line =~ '^\s*\<\k\+\>\s*()\s*{' ||
+ \ a:line =~ '^\s*{' ||
+ \ a:line =~ '^\s*function\s*\k\+\s*\%(()\)\?\s*{'
+endfunction
+
+function! s:is_array(line)
+ return a:line =~ '^\s*\<\k\+\>=('
+endfunction
+
+function! s:is_case_label(line, pnum)
+ if a:line !~ '^\s*(\=.*)'
+ return 0
+ endif
+
+ if a:pnum > 0
+ let pine = getline(a:pnum)
+ if !(s:is_case(pine) || s:is_case_ended(pine))
+ return 0
+ endif
+ endif
+
+ let suffix = substitute(a:line, '^\s*(\=', "", "")
+ let nesting = 0
+ let i = 0
+ let n = strlen(suffix)
+ while i < n
+ let c = suffix[i]
+ let i += 1
+ if c == '\\'
+ let i += 1
+ elseif c == '('
+ let nesting += 1
+ elseif c == ')'
+ if nesting == 0
+ return 1
+ endif
+ let nesting -= 1
+ endif
+ endwhile
+ return 0
+endfunction
+
+function! s:is_case(line)
+ return a:line =~ '^\s*case\>'
+endfunction
+
+function! s:is_case_break(line)
+ return a:line =~ '^\s*;[;&]'
+endfunction
+
+function! s:is_here_doc(line)
+ if a:line =~ '^\w\+$'
+ let here_pat = '<<-\?'. s:escape(a:line). '\$'
+ return search(here_pat, 'bnW') > 0
+ endif
+ return 0
+endfunction
+
+function! s:is_case_ended(line)
+ return s:is_case_break(a:line) || a:line =~ ';[;&]\s*\%(#.*\)\=$'
+endfunction
+
+function! s:is_case_empty(line)
+ if a:line =~ '^\s*$' || a:line =~ '^\s*#'
+ return s:is_case_empty(getline(v:lnum - 1))
+ else
+ return a:line =~ '^\s*case\>'
+ endif
+endfunction
+
+function! s:escape(pattern)
+ return '\V'. escape(a:pattern, '\\')
+endfunction
+
+function! s:is_empty(line)
+ return a:line =~ '^\s*$'
+endfunction
+
+function! s:end_block(line)
+ return a:line =~ '^\s*}'
+endfunction
+
+function! s:start_block(line)
+ return a:line =~ '{\s*\(#.*\)\?$'
+endfunction
+
+function! s:find_start_block(lnum)
+ let i = a:lnum
+ while i > 1 && !s:start_block(getline(i))
+ let i -= 1
+ endwhile
+ return i
+endfunction
+
+function! s:is_comment(line)
+ return a:line =~ '^\s*#'
+endfunction
+
+function! s:is_end_expression(line)
+ return a:line =~ '\<\%(fi\|esac\|done\|end\)\>\s*\%(#.*\)\=$'
+endfunction
+
+function! s:is_bash()
+ return get(g:, 'is_bash', 0) || get(b:, 'is_bash', 0)
+endfunction
+
+let &cpo = s:cpo_save
+unlet s:cpo_save