add support for the FGA language (helix-editor#12763)

book/src/generated/lang-support.md

@@ -55,6 +55,7 @@
 | erb | ✓ |  |  |  |
 | erlang | ✓ | ✓ |  | `erlang_ls`, `elp` |
 | esdl | ✓ |  |  |  |
+| fga | ✓ | ✓ | ✓ |  |
 | fidl | ✓ |  |  |  |
 | fish | ✓ | ✓ | ✓ | `fish-lsp` |
 | forth | ✓ |  |  | `forth-lsp` |

languages.toml

@@ -4136,3 +4136,15 @@ indent = { tab-width = 4, unit = "    " }
 [[grammar]]
 name = "tera"
 source = { git = "https://github.com/uncenter/tree-sitter-tera", rev = "e8d679a29c03e64656463a892a30da626e19ed8e" }
+
+[[language]]
+name = "fga"
+scope = "source.fga"
+injection-regex = "fga"
+file-types = ["fga"]
+comment-token = "#"
+indent = { tab-width = 2, unit = "  " }
+
+[[grammar]]
+name = "fga"
+source = { git = "https://github.com/matoous/tree-sitter-fga", rev = "5005e8dd976e1f67beb3d23204580eb6f8b4c965" }

runtime/queries/fga/highlights.scm

@@ -0,0 +1,97 @@
+; Expressions 
+
+(call_expression
+  function: (identifier) @function)
+
+(call_expression
+  function: (selector_expression
+    field: (identifier) @function.method))
+
+
+; Type Definitions
+
+(type_declaration (identifier) @type)
+
+(definition 
+  relation: (identifier) @variable)
+
+
+; Relation Definitions 
+
+(relation_def (identifier) @variable.other.member)
+
+(direct_relationship (identifier) @type)
+(direct_relationship (conditional (identifier) @function))
+
+(relation_ref 
+  . (identifier) @type
+  (identifier) @variable.other.member)
+
+(indirect_relation
+  . (identifier) @variable.other.member
+    (identifier) @variable)
+
+
+; Condition Defintions
+
+(condition_declaration
+  name: (identifier) @function)
+
+(condition_declaration (param (identifier) @variable.parameter))
+
+(binary_expression (identifier) @variable)
+
+((type_identifier) @type.builtin
+  (#any-of? @type.builtin "string" "int" "map" "uint" "list" "timestamp" "bool" "duration" "double" "ipaddress"))
+
+
+; Operators
+
+[
+  "!="
+  "%"
+  "&"
+  "&&"
+  "&^"
+  "*"
+  "+"
+  "-"
+  "/"
+  "<"
+  "<<"
+  "<="
+  "=="
+  ">"
+  ">="
+  ">>"
+  "^"
+  "|"
+  "||"
+] @operator
+
+[
+  "or"
+  "and"
+  "but not"
+  "from"
+  "with"
+] @keyword.operator
+
+; Keywords
+
+[
+  "model"
+  "schema"
+  "type"
+  "relations"
+  "define"
+] @keyword
+
+[
+  "condition"
+] @keyword.function
+
+; Misc
+
+(version) @constant.numeric
+(comment) @comment

runtime/queries/fga/indents.scm

@@ -0,0 +1,8 @@
+[
+  (source_file)
+  (type_declaration)
+  (relations)
+  (condition_declaration)
+] @indent
+
+"}" @outdent

runtime/queries/fga/textobjects.scm

@@ -0,0 +1,9 @@
+(condition_declaration
+  body: (_) @function.inside) @function.around
+
+(param 
+  ((_) @parameter.inside . ","? @parameter.around) @parameter.around)
+
+(comment) @comment.inside
+
+(comment)+ @comment.around