Add sass support

syntax/sass.vim

@@ -0,0 +1,58 @@
+" Vim syntax file
+" Language:     Sass
+" Maintainer:   Tim Pope <vimNOSPAM@tpope.info>
+" Filenames:    *.sass
+
+if exists("b:current_syntax")
+    finish
+endif
+
+runtime! syntax/css.vim
+
+syn case ignore
+
+syn cluster sassCssProperties contains=cssFontProp,cssFontDescriptorProp,cssColorProp,cssTextProp,cssBoxProp,cssGeneratedContentProp,cssPagingProp,cssUIProp,cssRenderProp,cssAuralProp,cssTableProp
+syn cluster sassCssAttributes contains=css.*Attr,cssComment,cssValue.*,cssColor,cssURL,cssImportant,cssError,cssStringQ,cssStringQQ,cssFunction,cssUnicodeEscape,cssRenderProp
+
+syn match sassProperty "^\s*\zs\s\%([[:alnum:]-]\+:\|:[[:alnum:]-]\+\)"hs=s+1 contains=css.*Prop skipwhite nextgroup=sassCssAttribute
+syn match sassCssAttribute ".*$" contained contains=@sassCssAttributes,sassConstant
+syn match sassConstant "![[:alnum:]_-]\+"
+syn match sassConstantAssignment "\%(![[:alnum:]_]\+\s*\)\@<==" nextgroup=sassCssAttribute skipwhite
+syn match sassMixin  "^=.*"
+syn match sassMixing "^\s\+\zs+.*"
+
+syn match sassEscape     "^\s*\zs\\"
+syn match sassIdChar     "#[[:alnum:]_-]\@=" nextgroup=sassId
+syn match sassId         "[[:alnum:]_-]\+" contained
+syn match sassClassChar  "\.[[:alnum:]_-]\@=" nextgroup=sassClass
+syn match sassClass      "[[:alnum:]_-]\+" contained
+syn match sassAmpersand  "&"
+
+" TODO: Attribute namespaces
+" TODO: Arithmetic (including strings and concatenation)
+
+syn region sassInclude start="@import" end=";\|$" contains=cssComment,cssURL,cssUnicodeEscape,cssMediaType
+
+syn keyword sassTodo        FIXME NOTE TODO OPTIMIZE XXX contained
+syn region  sassComment     start="^\z(\s*\)//"  end="^\%(\z1 \)\@!" contains=sassTodo
+syn region  sassCssComment  start="^\z(\s*\)/\*" end="^\%(\z1 \)\@!" contains=sassTodo
+
+hi def link sassCssComment              sassComment
+hi def link sassComment                 Comment
+hi def link sassConstant                Identifier
+hi def link sassMixing                  PreProc
+hi def link sassMixin                   PreProc
+hi def link sassTodo                    Todo
+hi def link sassInclude                 Include
+hi def link sassEscape                  Special
+hi def link sassIdChar                  Special
+hi def link sassClassChar               Special
+hi def link sassAmpersand               Character
+hi def link sassId                      Identifier
+hi def link sassClass                   Type
+
+let b:current_syntax = "sass"
+
+"if main_syntax == 'css'
+  "unlet main_syntax
+"endif