Update runtime files.

runtime/indent/yaml.vim

@@ -0,0 +1,132 @@
+" Vim indent file
+" Language:         YAML
+" Maintainer:       Nikolai Pavlov <zyx.vim@gmail.com>
+
+" Only load this indent file when no other was loaded.
+if exists('b:did_indent')
+  finish
+endif
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+let b:did_indent = 1
+
+setlocal indentexpr=GetYAMLIndent(v:lnum)
+setlocal indentkeys=!^F,o,O,0#,0},0],<:>,-
+setlocal nosmartindent
+
+let b:undo_indent = 'setlocal indentexpr< indentkeys< smartindent<'
+
+" Only define the function once.
+if exists('*GetYAMLIndent')
+    finish
+endif
+
+if exists('*shiftwidth')
+    let s:shiftwidth = function('shiftwidth')
+else
+    function s:shiftwidth()
+        return &shiftwidth
+    endfunction
+endif
+
+function s:FindPrevLessIndentedLine(lnum, ...)
+    let prevlnum = prevnonblank(a:lnum-1)
+    let curindent = a:0 ? a:1 : indent(a:lnum)
+    while           prevlnum
+                \&&  indent(prevlnum) >=  curindent
+                \&& getline(prevlnum) !~# '^\s*#'
+        let prevlnum = prevnonblank(prevlnum-1)
+    endwhile
+    return prevlnum
+endfunction
+
+function s:FindPrevLEIndentedLineMatchingRegex(lnum, regex)
+    let plilnum = s:FindPrevLessIndentedLine(a:lnum, indent(a:lnum)+1)
+    while plilnum && getline(plilnum) !~# a:regex
+        let plilnum = s:FindPrevLessIndentedLine(plilnum)
+    endwhile
+    return plilnum
+endfunction
+
+let s:mapkeyregex='\v^\s*%(\''%([^'']|'''')*\'''.
+                \        '|\"%([^"\\]|\\.)*\"'.
+                \        '|%(%(\:\ )@!.)*)\:%(\ |$)'
+let s:liststartregex='\v^\s*%(\-%(\ |$))'
+
+function GetYAMLIndent(lnum)
+    if a:lnum == 1 || !prevnonblank(a:lnum-1)
+        return 0
+    endif
+
+    let prevlnum = prevnonblank(a:lnum-1)
+    let previndent = indent(prevlnum)
+
+    let line = getline(a:lnum)
+    if line =~# '^\s*#' && getline(a:lnum-1) =~# '^\s*#'
+        " Comment blocks should have identical indent
+        return previndent
+    elseif line =~# '^\s*[\]}]'
+        " Lines containing only closing braces should have previous indent
+        return indent(s:FindPrevLessIndentedLine(a:lnum))
+    endif
+
+    " Ignore comment lines when calculating indent
+    while getline(prevlnum) =~# '^\s*#'
+        let prevlnum = prevnonblank(prevlnum-1)
+        if !prevlnum
+            return previndent
+        endif
+    endwhile
+
+    let prevline = getline(prevlnum)
+    let previndent = indent(prevlnum)
+
+    " Any examples below assume that shiftwidth=2
+    if prevline =~# '\v[{[:]$|[:-]\ [|>][+\-]?%(\s+\#.*|\s*)$'
+        " Mapping key:
+        "     nested mapping: ...
+        "
+        " - {
+        "     key: [
+        "         list value
+        "     ]
+        " }
+        "
+        " - |-
+        "     Block scalar without indentation indicator
+        return previndent+s:shiftwidth()
+    elseif prevline =~# '\v[:-]\ [|>]%(\d+[+\-]?|[+\-]?\d+)%(\#.*|\s*)$'
+        " - |+2
+        "   block scalar with indentation indicator
+        "#^^ indent+2, not indent+shiftwidth
+        return previndent + str2nr(matchstr(prevline,
+                    \'\v([:-]\ [|>])@<=[+\-]?\d+%([+\-]?%(\s+\#.*|\s*)$)@='))
+    elseif prevline =~# '\v\"%([^"\\]|\\.)*\\$'
+        "    "Multiline string \
+        "     with escaped end"
+        let qidx = match(prevline, '\v\"%([^"\\]|\\.)*\\')
+        return virtcol([prevlnum, qidx+1])
+    elseif line =~# s:liststartregex
+        " List line should have indent equal to previous list line unless it was 
+        " caught by one of the previous rules
+        return indent(s:FindPrevLEIndentedLineMatchingRegex(a:lnum,
+                    \                                       s:liststartregex))
+    elseif line =~# s:mapkeyregex
+        " Same for line containing mapping key
+        return indent(s:FindPrevLEIndentedLineMatchingRegex(a:lnum,
+                    \                                       s:mapkeyregex))
+    elseif prevline =~# '^\s*- '
+        " - List with
+        "   multiline scalar
+        return previndent+2
+    elseif prevline =~# s:mapkeyregex
+        " Mapping with: value
+        "     that is multiline scalar
+        return previndent+s:shiftwidth()
+    endif
+    return previndent
+endfunction
+
+let &cpo = s:save_cpo