Initial code

Author: scizzorz

ftdetect/mold.vim

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+au BufReadPost,FileReadPost,BufNewFile moldfile set filetype=mold
+au BufReadPost,FileReadPost,BufNewFile *.mold set filetype=mold

indent/mold.vim

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+setlocal nolisp
+setlocal autoindent
+setlocal indentkeys+=<:>,0=},0=)
+setlocal indentexpr=MoldIndent(v:lnum)
+
+function! MoldIndent(lnum) abort
+  let l:prevlnum = prevnonblank(a:lnum-1)
+  if l:prevlnum == 0
+    return 0
+  endif
+
+  " strip comments from EOL
+  let l:prevl = substitute(getline(l:prevlnum), '\(//\|#\).*$', '', '')
+  let l:thisl = substitute(getline(a:lnum), '\(//\|#\).*$', '', '')
+  let l:previ = indent(l:prevlnum)
+
+  let l:ind = l:previ
+
+  if l:prevl =~ '{\s*$'
+    " previous line opened a block
+    let l:ind += shiftwidth()
+  endif
+
+  if l:thisl =~ '^\s*}'
+    " this line closed a block
+    let l:ind -= shiftwidth()
+  endif
+
+  return l:ind
+endfunction

syntax/mold.vim

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+if exists("b:current_syntax")
+  finish
+endif
+
+syn keyword moldKeyword dir help if import recipe as require run var version
+syn match moldKeyword "\v\$"
+
+syn match moldSymbol "\v\("
+syn match moldSymbol "\v\)"
+syn match moldSymbol "\v\{"
+syn match moldSymbol "\v\}"
+syn match moldSymbol "\v\="
+
+syn match moldOperator "\v\+"
+syn match moldOperator "\v\|"
+syn match moldOperator "\v\~"
+
+syn match moldWild "\v\*"
+
+syn region moldString start=+"+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ keepend
+
+syn match moldComment1 "#.*$" display
+syn match moldComment2 "\/\/.*$" display
+
+hi link moldWild Special
+hi link moldSymbol Operator
+hi link moldOperator Identifier
+hi link moldString String
+hi link moldWild Boolean
+hi link moldKeyword Keyword
+hi link moldComment1 Comment
+hi link moldComment2 Comment
+" hi link moldType Type
+" hi link moldGeneric Identifier
+" PreProc
+"  Boolean
+"  String
+"  Number
+"  Number
+"  Comment
+" not used PreProc