Add Vim plugin for Rego

misc/syntax/vim/README.md

@@ -0,0 +1,3 @@
+# vim-rego
+
+A Vim plugin for the Rego language that includes support for syntax highlighting.

misc/syntax/vim/ftdetect/rego.vim

@@ -0,0 +1 @@
+autocmd BufRead,BufNewFile *.rego set filetype=rego

misc/syntax/vim/syntax/rego.vim

@@ -0,0 +1,57 @@
+" Vim syntax file
+" Language: Rego (http://github.com/open-policy-agent/opa)
+" Maintainers: Torin Sandall <torinsandall@gmail.com>
+
+if version < 600
+    syntax clear
+elseif exists("b:current_syntax")
+    finish
+endif
+
+syn case match
+
+" language keywords
+syn keyword regoKeyword package import as not
+
+" comments
+syn match regoComment "#.*$" contains=regoTodo,@Spell
+syn keyword regoTodo FIXME XXX TODO contained
+
+" data types
+syn keyword regoNull null
+syn keyword regoBoolean true false
+syn match regoNumber "\<\(0[0-7]*\|0[xx]\x\+\|\d\+\)[ll]\=\>"
+syn match regoNumber "\(\<\d\+\.\d*\|\.\d\+\)\([ee][-+]\=\d\+\)\=[ffdd]\="
+syn match regoNumber "\<\d\+[ee][-+]\=\d\+[ffdd]\=\>"
+syn match regoNumber "\<\d\+\([ee][-+]\=\d\+\)\=[ffdd]\>"
+syn region regoString start="\"[^"]" skip="\\\"" end="\"" contains=regoStringEscape
+syn match regoStringEscape "\\u[0-9a-fA-F]\{4}" contained
+syn match regoStringEscape "\\[nrfvb\\\"]" contained
+
+" rule head
+syn match regoRuleName "^\w\+" nextgroup=regoRuleKey,regoRuleValue skipwhite
+syn region regoRuleKey start="\[" end="\]" contained skipwhite
+syn match regoRuleValue "=\w\+" nextgroup=regoIfThen skipwhite
+
+" operators
+syn match regoIfThen ":-"
+syn match regoEquality "="
+syn match regoInequality "[<>!]"
+syn match regoBuiltin "\w\+(" nextgroup=regoBuiltinArgs contains=regoBuiltinArgs
+syn region regoBuiltinArgs start="(" end=")" contained contains=regoNumber,regoNull,regoBoolean,regoString
+
+" highlighting
+hi link regoKeyword Keyword
+hi link regoNull Function
+hi link regoBoolean Boolean
+hi link regoNumber Number
+hi link regoString String
+hi link regoRuleName Function
+hi link regoRuleKey Normal
+hi link regoRuleValue Normal
+hi link regoIfThen Keyword
+hi link regoEquality Keyword
+hi link regoInequality Keyword
+hi link regoBuiltin Keyword
+hi link regoComment Comment
+hi link regoTodo Todo