Fix weird indentation issue of yaml

9 files changed, 455 insertions, 10 deletions

diff --git a/README.md b/README.md
index 6789eb72..deaa8666 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ A collection of language packs for Vim.
 > One to rule them all, one to find them, one to bring them all and in the darkness bind them.
 
 - It **won't affect your startup time**, as scripts are loaded only on demand\*.
-- It **installs and updates 120+ times faster** than the <!--Package Count-->191<!--/Package Count--> packages it consists of.
+- It **installs and updates 120+ times faster** than the <!--Package Count-->192<!--/Package Count--> packages it consists of.
 - It is more secure because scripts loaded for all extensions are generated by vim-polyglot (ftdetect).
 - Solid syntax and indentation support (other features skipped). Only the best language packs.
 - All unnecessary files are ignored (like enormous documentation from php support).
@@ -229,7 +229,8 @@ If you need full functionality of any plugin, please use it directly with your p
 - [xdc](https://github.com/amal-khailtash/vim-xdc-syntax)
 - [xml](https://github.com/amadeus/vim-xml)
 - [xsl](https://github.com/vim-scripts/XSLT-syntax)
-- [yaml](https://github.com/stephpy/vim-yaml)
+- [yaml-extras](https://github.com/stephpy/vim-yaml)
+- [yaml](https://github.com/vim/vim/tree/df44a27b53586fccfc6a3aedc89061fdd9a515ff/runtime)
 - [yard](https://github.com/sheerun/vim-yardoc)
 - [zephir](https://github.com/xwsoul/vim-zephir)
 - [zig](https://github.com/ziglang/zig.vim)
diff --git a/after/ftplugin/yaml.vim b/after/ftplugin/yaml.vim
index db608fa4..69785fc2 100644
--- a/after/ftplugin/yaml.vim
+++ b/after/ftplugin/yaml.vim
@@ -1,4 +1,4 @@
-if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'yaml') == -1
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'yaml-extras') == -1
 
 " Vim indent file
 " Language: Yaml
diff --git a/after/syntax/yaml.vim b/after/syntax/yaml.vim
index 097d1535..3a1e89a2 100644
--- a/after/syntax/yaml.vim
+++ b/after/syntax/yaml.vim
@@ -1,4 +1,4 @@
-if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'yaml') == -1
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'yaml-extras') == -1
 
 " To make this file do stuff, add something like the following (without the
 " leading ") to your ~/.vimrc:
diff --git a/ftdetect/polyglot.vim b/ftdetect/polyglot.vim
index 186ba9da..792c2432 100644
--- a/ftdetect/polyglot.vim
+++ b/ftdetect/polyglot.vim
@@ -1677,6 +1677,9 @@ if !has_key(s:disabled_packages, 'xsl')
   au BufNewFile,BufRead *.xslt setf xsl
 endif
 
+if !has_key(s:disabled_packages, 'yaml-extras')
+endif
+
 if !has_key(s:disabled_packages, 'ansible')
   au BufNewFile,BufRead group_vars/* setf yaml.ansible
   au BufNewFile,BufRead handlers.*.y{a,}ml setf yaml.ansible
diff --git a/ftplugin/yaml.vim b/ftplugin/yaml.vim
new file mode 100644
index 00000000..2e9728bd
--- /dev/null
+++ b/ftplugin/yaml.vim
@@ -0,0 +1,29 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'yaml') == -1
+
+" Vim filetype plugin file
+" Language:             YAML (YAML Ain't Markup Language)
+" Previous Maintainer:  Nikolai Weibull <now@bitwi.se> (inactive)
+" Last Change:      	2020 Mar 02
+
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin = 1
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+let b:undo_ftplugin = "setl com< cms< et< fo<"
+
+setlocal comments=:# commentstring=#\ %s expandtab
+setlocal formatoptions-=t formatoptions+=croql
+
+if !exists("g:yaml_recommended_style") || g:yaml_recommended_style != 0
+  let b:undo_ftplugin ..= " sw< sts<"
+  setlocal shiftwidth=2 softtabstop=2
+endif
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+endif
diff --git a/indent/yaml.vim b/indent/yaml.vim
new file mode 100644
index 00000000..c7fdebcf
--- /dev/null
+++ b/indent/yaml.vim
@@ -0,0 +1,159 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'yaml') == -1
+
+" Vim indent file
+" Language:         YAML
+" Maintainer:       Nikolai Pavlov <zyx.vim@gmail.com>
+" Last Change:	    2019 Sep 28
+
+" 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],<:>,0-
+setlocal nosmartindent
+
+let b:undo_indent = 'setlocal indentexpr< indentkeys< smartindent<'
+
+" Only define the function once.
+if exists('*GetYAMLIndent')
+    finish
+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*\#@!\S@=%(\''%([^'']|\''\'')*\'''.
+                \                 '|\"%([^"\\]|\\.)*\"'.
+                \                 '|%(%(\:\ )@!.)*)\:%(\ |$)'
+let s:liststartregex='\v^\s*%(\-%(\ |$))'
+
+let s:c_ns_anchor_char = '\v%([\n\r\uFEFF \t,[\]{}]@!\p)'
+let s:c_ns_anchor_name = s:c_ns_anchor_char.'+'
+let s:c_ns_anchor_property =  '\v\&'.s:c_ns_anchor_name
+
+let s:ns_word_char = '\v[[:alnum:]_\-]'
+let s:ns_tag_char  = '\v%(%\x\x|'.s:ns_word_char.'|[#/;?:@&=+$.~*''()])'
+let s:c_named_tag_handle     = '\v\!'.s:ns_word_char.'+\!'
+let s:c_secondary_tag_handle = '\v\!\!'
+let s:c_primary_tag_handle   = '\v\!'
+let s:c_tag_handle = '\v%('.s:c_named_tag_handle.
+            \            '|'.s:c_secondary_tag_handle.
+            \            '|'.s:c_primary_tag_handle.')'
+let s:c_ns_shorthand_tag = '\v'.s:c_tag_handle . s:ns_tag_char.'+'
+let s:c_non_specific_tag = '\v\!'
+let s:ns_uri_char  = '\v%(%\x\x|'.s:ns_word_char.'\v|[#/;?:@&=+$,.!~*''()[\]])'
+let s:c_verbatim_tag = '\v\!\<'.s:ns_uri_char.'+\>'
+let s:c_ns_tag_property = '\v'.s:c_verbatim_tag.
+            \               '\v|'.s:c_ns_shorthand_tag.
+            \               '\v|'.s:c_non_specific_tag
+
+let s:block_scalar_header = '\v[|>]%([+-]?[1-9]|[1-9]?[+-])?'
+
+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+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
+        let prevmapline = s:FindPrevLEIndentedLineMatchingRegex(a:lnum,
+                    \                                           s:mapkeyregex)
+        if getline(prevmapline) =~# '^\s*- '
+            return indent(prevmapline) + 2
+        else
+            return indent(prevmapline)
+        endif
+    elseif prevline =~# '^\s*- '
+        " - List with
+        "   multiline scalar
+        return previndent+2
+    elseif prevline =~# s:mapkeyregex . '\v\s*%(%('.s:c_ns_tag_property.
+                \                              '\v|'.s:c_ns_anchor_property.
+                \                              '\v|'.s:block_scalar_header.
+                \                             '\v)%(\s+|\s*%(\#.*)?$))*'
+        " Mapping with: value
+        "     that is multiline scalar
+        return previndent+shiftwidth()
+    endif
+    return previndent
+endfunction
+
+let &cpo = s:save_cpo
+
+endif
diff --git a/packages.yaml b/packages.yaml
index f757cf99..65df8369 100644
--- a/packages.yaml
+++ b/packages.yaml
@@ -1650,7 +1650,9 @@ filetypes:
   linguist: XSLT
 ---
 name: yaml
-remote: stephpy/vim-yaml
+# Fixes indentation issue: https://github.com/vim/vim/issues/6417
+remote: vim/vim@df44a27b53586fccfc6a3aedc89061fdd9a515ff:runtime
+glob: '**/yaml.vim'
 filetypes:
 - name: yaml
   linguist: YAML
@@ -1659,6 +1661,11 @@ filetypes:
   - fish_read_history
   ignored_filenames:
   - '~/.config/fish/fish_{read_,}history'
+---
+name: yaml-extras
+remote: stephpy/vim-yaml
+after: yaml
+filetypes: []
 # Ansible needs to be after YAML
 ---
 name: ansible
diff --git a/scripts/build b/scripts/build
index 79a1cfe7..c9a12743 100755
--- a/scripts/build
+++ b/scripts/build
@@ -155,7 +155,8 @@ end
 
 def parse_remote(remote)
   match = remote.match(/(?<repo>[^@:]+)(?:@(?<branch>[^:]+))?(?::(?<path>.*))?/)
-  [match[:repo], match[:branch] || "master", match[:path]]
+  dir = "tmp/" + match[:repo] + (match[:branch] ? "-#{match[:branch]}" : "")
+  [match[:repo], match[:branch] || "master", match[:path], dir]
 end
 
 def copy_file(package, src, dest)
@@ -179,8 +180,7 @@ def download(packages)
   packages.map { |p| p["remote"] or raise "No remote for: " + p["name"] }.uniq.each_slice(20) do |remotes|
     remotes.map do |remote|
       Thread.new do
-        repo, branch, path = parse_remote(remote)
-        dir = "tmp/" + repo
+        repo, branch, path, dir = parse_remote(remote)
         unless File.exist?(dir)
           FileUtils.mkdir_p(dir)
           url = "https://codeload.github.com/#{repo}/tar.gz/#{branch}"
@@ -321,8 +321,7 @@ def extract(packages)
 
   output = []
   packages.map do |package|
-    repo, branch, path = parse_remote(package["remote"])
-    dir = "tmp/" + repo
+    repo, branch, path, dir = parse_remote(package["remote"])
     dirs = package.fetch("dirs", default_dirs)
     ignored_dirs = package.fetch("ignored_dirs", [])
     if ignored_dirs.size > 0
diff --git a/syntax/yaml.vim b/syntax/yaml.vim
new file mode 100644
index 00000000..53e60684
--- /dev/null
+++ b/syntax/yaml.vim
@@ -0,0 +1,247 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'yaml') == -1
+
+" Vim syntax file
+" Language:         YAML (YAML Ain't Markup Language) 1.2
+" Maintainer:       Nikolai Pavlov <zyx.vim@gmail.com>
+" First author:     Nikolai Weibull <now@bitwi.se>
+" Latest Revision:  2015-03-28
+" 		    removed duplicate yamlKeyValueDelimiter (pull #4799)
+
+if exists('b:current_syntax')
+    finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+" Choose the schema to use
+" TODO: Validate schema
+if !exists('b:yaml_schema')
+  if exists('g:yaml_schema')
+    let b:yaml_schema = g:yaml_schema
+  else
+    let b:yaml_schema = 'core'
+  endif
+endif
+
+let s:ns_char = '\%([\n\r\uFEFF \t]\@!\p\)'
+let s:ns_word_char = '[[:alnum:]_\-]'
+let s:ns_uri_char  = '\%(%\x\x\|'.s:ns_word_char.'\|[#/;?:@&=+$,.!~*''()[\]]\)'
+let s:ns_tag_char  = '\%(%\x\x\|'.s:ns_word_char.'\|[#/;?:@&=+$.~*''()]\)'
+let s:c_ns_anchor_char = '\%([\n\r\uFEFF \t,[\]{}]\@!\p\)'
+let s:c_indicator      = '[\-?:,[\]{}#&*!|>''"%@`]'
+let s:c_flow_indicator = '[,[\]{}]'
+
+let s:ns_char_without_c_indicator = substitute(s:ns_char, '\v\C[\zs', '\=s:c_indicator[1:-2]', '')
+
+let s:_collection = '[^\@!\(\%(\\\.\|\[^\\\]]\)\+\)]'
+let s:_neg_collection = '[^\(\%(\\\.\|\[^\\\]]\)\+\)]'
+function s:SimplifyToAssumeAllPrintable(p)
+    return substitute(a:p, '\V\C\\%('.s:_collection.'\\@!\\p\\)', '[^\1]', '')
+endfunction
+let s:ns_char = s:SimplifyToAssumeAllPrintable(s:ns_char)
+let s:ns_char_without_c_indicator = s:SimplifyToAssumeAllPrintable(s:ns_char_without_c_indicator)
+let s:c_ns_anchor_char = s:SimplifyToAssumeAllPrintable(s:c_ns_anchor_char)
+
+function s:SimplifyAdjacentCollections(p)
+    return substitute(a:p, '\V\C'.s:_collection.'\\|'.s:_collection, '[\1\2]', 'g')
+endfunction
+let s:ns_uri_char = s:SimplifyAdjacentCollections(s:ns_uri_char)
+let s:ns_tag_char = s:SimplifyAdjacentCollections(s:ns_tag_char)
+
+let s:c_verbatim_tag = '!<'.s:ns_uri_char.'\+>'
+let s:c_named_tag_handle     = '!'.s:ns_word_char.'\+!'
+let s:c_secondary_tag_handle = '!!'
+let s:c_primary_tag_handle   = '!'
+let s:c_tag_handle = '\%('.s:c_named_tag_handle.
+            \         '\|'.s:c_secondary_tag_handle.
+            \         '\|'.s:c_primary_tag_handle.'\)'
+let s:c_ns_shorthand_tag = s:c_tag_handle . s:ns_tag_char.'\+'
+let s:c_non_specific_tag = '!'
+let s:c_ns_tag_property = s:c_verbatim_tag.
+            \        '\|'.s:c_ns_shorthand_tag.
+            \        '\|'.s:c_non_specific_tag
+
+let s:c_ns_anchor_name = s:c_ns_anchor_char.'\+'
+let s:c_ns_anchor_property =  '&'.s:c_ns_anchor_name
+let s:c_ns_alias_node      = '\*'.s:c_ns_anchor_name
+
+let s:ns_directive_name = s:ns_char.'\+'
+
+let s:ns_local_tag_prefix  = '!'.s:ns_uri_char.'*'
+let s:ns_global_tag_prefix = s:ns_tag_char.s:ns_uri_char.'*'
+let s:ns_tag_prefix = s:ns_local_tag_prefix.
+            \    '\|'.s:ns_global_tag_prefix
+
+let s:ns_plain_safe_out = s:ns_char
+let s:ns_plain_safe_in  = '\%('.s:c_flow_indicator.'\@!'.s:ns_char.'\)'
+
+let s:ns_plain_safe_in = substitute(s:ns_plain_safe_in, '\V\C\\%('.s:_collection.'\\@!'.s:_neg_collection.'\\)', '[^\1\2]', '')
+let s:ns_plain_safe_in_without_colhash = substitute(s:ns_plain_safe_in, '\V\C'.s:_neg_collection, '[^\1:#]', '')
+let s:ns_plain_safe_out_without_colhash = substitute(s:ns_plain_safe_out, '\V\C'.s:_neg_collection, '[^\1:#]', '')
+
+let s:ns_plain_first_in  = '\%('.s:ns_char_without_c_indicator.'\|[?:\-]\%('.s:ns_plain_safe_in.'\)\@=\)'
+let s:ns_plain_first_out = '\%('.s:ns_char_without_c_indicator.'\|[?:\-]\%('.s:ns_plain_safe_out.'\)\@=\)'
+
+let s:ns_plain_char_in  = '\%('.s:ns_char.'#\|:'.s:ns_plain_safe_in.'\|'.s:ns_plain_safe_in_without_colhash.'\)'
+let s:ns_plain_char_out = '\%('.s:ns_char.'#\|:'.s:ns_plain_safe_out.'\|'.s:ns_plain_safe_out_without_colhash.'\)'
+
+let s:ns_plain_out = s:ns_plain_first_out . s:ns_plain_char_out.'*'
+let s:ns_plain_in  = s:ns_plain_first_in  . s:ns_plain_char_in.'*'
+
+
+syn keyword yamlTodo            contained TODO FIXME XXX NOTE
+
+syn region  yamlComment         display oneline start='\%\(^\|\s\)#' end='$'
+            \                   contains=yamlTodo
+
+execute 'syn region yamlDirective oneline start='.string('^\ze%'.s:ns_directive_name.'\s\+').' '.
+            \                            'end="$" '.
+            \                            'contains=yamlTAGDirective,'.
+            \                                     'yamlYAMLDirective,'.
+            \                                     'yamlReservedDirective '.
+            \                            'keepend'
+
+syn match yamlTAGDirective '%TAG\s\+' contained nextgroup=yamlTagHandle
+execute 'syn match yamlTagHandle contained nextgroup=yamlTagPrefix '.string(s:c_tag_handle.'\s\+')
+execute 'syn match yamlTagPrefix contained nextgroup=yamlComment ' . string(s:ns_tag_prefix)
+
+syn match yamlYAMLDirective '%YAML\s\+'  contained nextgroup=yamlYAMLVersion
+syn match yamlYAMLVersion   '\d\+\.\d\+' contained nextgroup=yamlComment
+
+execute 'syn match yamlReservedDirective contained nextgroup=yamlComment '.
+            \string('%\%(\%(TAG\|YAML\)\s\)\@!'.s:ns_directive_name)
+
+syn region yamlFlowString matchgroup=yamlFlowStringDelimiter start='"' skip='\\"' end='"'
+            \ contains=yamlEscape
+            \ nextgroup=yamlKeyValueDelimiter
+syn region yamlFlowString matchgroup=yamlFlowStringDelimiter start="'" skip="''"  end="'"
+            \ contains=yamlSingleEscape
+            \ nextgroup=yamlKeyValueDelimiter
+syn match  yamlEscape contained '\\\%([\\"abefnrtv\^0_ NLP\n]\|x\x\x\|u\x\{4}\|U\x\{8}\)'
+syn match  yamlSingleEscape contained "''"
+
+syn match yamlBlockScalarHeader contained '\s\+\zs[|>]\%([+-]\=[1-9]\|[1-9]\=[+-]\)\='
+
+syn cluster yamlConstant contains=yamlBool,yamlNull
+
+syn cluster yamlFlow contains=yamlFlowString,yamlFlowMapping,yamlFlowCollection
+syn cluster yamlFlow      add=yamlFlowMappingKey,yamlFlowMappingMerge
+syn cluster yamlFlow      add=@yamlConstant,yamlPlainScalar,yamlFloat
+syn cluster yamlFlow      add=yamlTimestamp,yamlInteger,yamlMappingKeyStart
+syn cluster yamlFlow      add=yamlComment
+syn region yamlFlowMapping    matchgroup=yamlFlowIndicator start='{' end='}' contains=@yamlFlow
+syn region yamlFlowCollection matchgroup=yamlFlowIndicator start='\[' end='\]' contains=@yamlFlow
+
+execute 'syn match yamlPlainScalar /'.s:ns_plain_out.'/'
+execute 'syn match yamlPlainScalar contained /'.s:ns_plain_in.'/'
+
+syn match yamlMappingKeyStart '?\ze\s'
+syn match yamlMappingKeyStart '?' contained
+
+execute 'syn match yamlFlowMappingKey /\%#=1'.s:ns_plain_in.'\%(\s\+'.s:ns_plain_in.'\)*\ze\s*:/ contained '.
+            \'nextgroup=yamlKeyValueDelimiter'
+syn match yamlFlowMappingMerge /<<\ze\s*:/ contained nextgroup=yamlKeyValueDelimiter
+
+syn match yamlBlockCollectionItemStart '^\s*\zs-\%(\s\+-\)*\s' nextgroup=yamlBlockMappingKey,yamlBlockMappingMerge
+" Use the old regexp engine, the NFA engine doesn't like all the \@ items.
+execute 'syn match yamlBlockMappingKey /\%#=1^\s*\zs'.s:ns_plain_out.'\%(\s\+'.s:ns_plain_out.'\)*\ze\s*:\%(\s\|$\)/ '.
+            \'nextgroup=yamlKeyValueDelimiter'
+execute 'syn match yamlBlockMappingKey /\%#=1\s*\zs'.s:ns_plain_out.'\%(\s\+'.s:ns_plain_out.'\)*\ze\s*:\%(\s\|$\)/ contained '.
+            \'nextgroup=yamlKeyValueDelimiter'
+syn match yamlBlockMappingMerge /^\s*\zs<<\ze:\%(\s\|$\)/ nextgroup=yamlKeyValueDelimiter
+syn match yamlBlockMappingMerge /<<\ze\s*:\%(\s\|$\)/ nextgroup=yamlKeyValueDelimiter contained
+
+syn match   yamlKeyValueDelimiter /\s*:/ contained
+
+syn cluster yamlScalarWithSpecials contains=yamlPlainScalar,yamlBlockMappingKey,yamlFlowMappingKey
+
+let s:_bounder = s:SimplifyToAssumeAllPrintable('\%([[\]{}, \t]\@!\p\)')
+if b:yaml_schema is# 'json'
+    syn keyword yamlNull null contained containedin=@yamlScalarWithSpecials
+    syn keyword yamlBool true false
+    exe 'syn match   yamlInteger /'.s:_bounder.'\@1<!\%(0\|-\=[1-9][0-9]*\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+    exe 'syn match   yamlFloat   /'.s:_bounder.'\@1<!\%(-\=[1-9][0-9]*\%(\.[0-9]*\)\=\(e[-+]\=[0-9]\+\)\=\|0\|-\=\.inf\|\.nan\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+elseif b:yaml_schema is# 'core'
+    syn keyword yamlNull null Null NULL contained containedin=@yamlScalarWithSpecials
+    syn keyword yamlBool true True TRUE false False FALSE contained containedin=@yamlScalarWithSpecials
+    exe 'syn match   yamlNull /'.s:_bounder.'\@1<!\~'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+    exe 'syn match   yamlInteger /'.s:_bounder.'\@1<!\%([+-]\=\%(0\%(b[0-1_]\+\|[0-7_]\+\|x[0-9a-fA-F_]\+\)\=\|\%([1-9][0-9_]*\%(:[0-5]\=\d\)\+\)\)\|[1-9][0-9_]*\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+    exe 'syn match   yamlFloat /'.s:_bounder.'\@1<!\%([+-]\=\%(\%(\d[0-9_]*\)\.[0-9_]*\%([eE][+-]\=\d\+\)\=\|\.[0-9_]\+\%([eE][-+]\=[0-9]\+\)\=\|\d[0-9_]*\%(:[0-5]\=\d\)\+\.[0-9_]*\|\.\%(inf\|Inf\|INF\)\)\|\%(\.\%(nan\|NaN\|NAN\)\)\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+elseif b:yaml_schema is# 'pyyaml'
+    syn keyword yamlNull null Null NULL contained containedin=@yamlScalarWithSpecials
+    syn keyword yamlBool true True TRUE false False FALSE yes Yes YES no No NO on On ON off Off OFF contained containedin=@yamlScalarWithSpecials
+    exe 'syn match   yamlNull /'.s:_bounder.'\@1<!\~'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+    exe 'syn match  yamlFloat /'.s:_bounder.'\@1<!\%(\v[-+]?%(\d[0-9_]*)\.[0-9_]*%([eE][-+]\d+)?|\.[0-9_]+%([eE][-+]\d+)?|[-+]?\d[0-9_]*%(\:[0-5]?\d)+\.[0-9_]*|[-+]?\.%(inf|Inf|INF)|\.%(nan|NaN|NAN)\m\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+    exe 'syn match  yamlInteger /'.s:_bounder.'\@1<!\%(\v[-+]?0b[0-1_]+|[-+]?0[0-7_]+|[-+]?%(0|[1-9][0-9_]*)|[-+]?0x[0-9a-fA-F_]+|[-+]?[1-9][0-9_]*%(:[0-5]?\d)+\m\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+    exe 'syn match  yamlTimestamp /'.s:_bounder.'\@1<!\%(\v\d\d\d\d\-\d\d\-\d\d|\d\d\d\d \-\d\d? \-\d\d?%([Tt]|[ \t]+)\d\d?\:\d\d \:\d\d %(\.\d*)?%([ \t]*%(Z|[-+]\d\d?%(\:\d\d)?))?\m\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+elseif b:yaml_schema is# 'failsafe'
+    " Nothing
+endif
+unlet s:_bounder
+
+
+execute 'syn match yamlNodeTag '.string(s:c_ns_tag_property)
+execute 'syn match yamlAnchor  '.string(s:c_ns_anchor_property)
+execute 'syn match yamlAlias   '.string(s:c_ns_alias_node)
+
+syn match yamlDocumentStart '^---\ze\%(\s\|$\)'
+syn match yamlDocumentEnd   '^\.\.\.\ze\%(\s\|$\)'
+
+hi def link yamlTodo                     Todo
+hi def link yamlComment                  Comment
+
+hi def link yamlDocumentStart            PreProc
+hi def link yamlDocumentEnd              PreProc
+
+hi def link yamlDirectiveName            Keyword
+
+hi def link yamlTAGDirective             yamlDirectiveName
+hi def link yamlTagHandle                String
+hi def link yamlTagPrefix                String
+
+hi def link yamlYAMLDirective            yamlDirectiveName
+hi def link yamlReservedDirective        Error
+hi def link yamlYAMLVersion              Number
+
+hi def link yamlString                   String
+hi def link yamlFlowString               yamlString
+hi def link yamlFlowStringDelimiter      yamlString
+hi def link yamlEscape                   SpecialChar
+hi def link yamlSingleEscape             SpecialChar
+
+hi def link yamlBlockCollectionItemStart Label
+hi def link yamlBlockMappingKey          Identifier
+hi def link yamlBlockMappingMerge        Special
+
+hi def link yamlFlowMappingKey           Identifier
+hi def link yamlFlowMappingMerge         Special
+
+hi def link yamlMappingKeyStart          Special
+hi def link yamlFlowIndicator            Special
+hi def link yamlKeyValueDelimiter        Special
+
+hi def link yamlConstant                 Constant
+
+hi def link yamlNull                     yamlConstant
+hi def link yamlBool                     yamlConstant
+
+hi def link yamlAnchor                   Type
+hi def link yamlAlias                    Type
+hi def link yamlNodeTag                  Type
+
+hi def link yamlInteger                  Number
+hi def link yamlFloat                    Float
+hi def link yamlTimestamp                Number
+
+let b:current_syntax = "yaml"
+
+unlet s:ns_word_char s:ns_uri_char s:c_verbatim_tag s:c_named_tag_handle s:c_secondary_tag_handle s:c_primary_tag_handle s:c_tag_handle s:ns_tag_char s:c_ns_shorthand_tag s:c_non_specific_tag s:c_ns_tag_property s:c_ns_anchor_char s:c_ns_anchor_name s:c_ns_anchor_property s:c_ns_alias_node s:ns_char s:ns_directive_name s:ns_local_tag_prefix s:ns_global_tag_prefix s:ns_tag_prefix s:c_indicator s:ns_plain_safe_out s:c_flow_indicator s:ns_plain_safe_in s:ns_plain_first_in s:ns_plain_first_out s:ns_plain_char_in s:ns_plain_char_out s:ns_plain_out s:ns_plain_in s:ns_char_without_c_indicator s:ns_plain_safe_in_without_colhash s:ns_plain_safe_out_without_colhash
+unlet s:_collection s:_neg_collection
+delfunction s:SimplifyAdjacentCollections
+delfunction s:SimplifyToAssumeAllPrintable
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+endif