Add language: beancount (#3297)

Co-authored-by: erasin <erasinoo@gmail.com>
Co-authored-by: Michael Davis <mcarsondavis@gmail.com>
Co-authored-by: Erasin <erasinoo@gmail.com>

book/src/generated/lang-support.md

@@ -1,6 +1,7 @@
 | Language | Syntax Highlighting | Treesitter Textobjects | Auto Indent | Default LSP |
 | --- | --- | --- | --- | --- |
 | bash | ✓ |  |  | `bash-language-server` |
+| beancount | ✓ |  |  |  |
 | c | ✓ | ✓ | ✓ | `clangd` |
 | c-sharp | ✓ |  |  | `OmniSharp` |
 | cairo | ✓ |  |  |  |

languages.toml

@@ -599,6 +599,19 @@ indent = { tab-width = 4, unit = "    " }
 name = "ledger"
 source = { git = "https://github.com/cbarrete/tree-sitter-ledger", rev = "1f864fb2bf6a87fe1b48545cc6adc6d23090adf7" }
 
+[[language]]
+name = "beancount"
+scope = "source.beancount"
+injection-regex = "beancount"
+file-types = ["beancount", "bean"]
+roots = []
+comment-token = ";"
+indent = { tab-width = 2, unit = "  " }
+
+[[grammar]]
+name = "beancount"
+source = { git = "https://github.com/polarmutex/tree-sitter-beancount", rev = "4cbd1f09cd07c1f1fabf867c2cf354f9da53cc4c" }
+
 [[language]]
 name = "ocaml"
 scope = "source.ocaml"

runtime/queries/beancount/folds.scm

@@ -0,0 +1,4 @@
+[
+  (transaction)
+  (section)
+] @fold

runtime/queries/beancount/highlights.scm

@@ -0,0 +1,49 @@
+(date) @variable.builtin
+(txn) @variable.builtin
+
+(account) @type
+
+[
+  (amount)
+  (incomplete_amount)
+  (amount_tolerance)
+  (number)
+] @constant.numeric
+
+
+[(key_value) (key)] @variable.other.member
+(string) @string
+
+[
+  (currency)
+  (tag)
+  (link)
+] @constant
+
+(comment) @comment
+
+[
+  (minus)
+  (plus)
+] @operator
+
+[
+  (balance) (open) (close) (commodity) (pad)
+  (event) (price) (note) (document) (query)
+  (custom) (pushtag) (poptag) (pushmeta)
+  (popmeta) (option) (include) (plugin)
+] @keyword
+
+
+((headline item: (item) @markup.heading.6) @markup.heading.marker
+ (#match? @markup.heading.marker "^\\*\\*\\*\\*\\*\\*"))
+((headline item: (item) @markup.heading.5) @markup.heading.marker
+ (#match? @markup.heading.marker "^\\*\\*\\*\\*\\*"))
+((headline item: (item) @markup.heading.4) @markup.heading.marker
+ (#match? @markup.heading.marker "^\\*\\*\\*\\*"))
+((headline item: (item) @markup.heading.3) @markup.heading.marker
+ (#match? @markup.heading.marker "^\\*\\*\\*"))
+((headline item: (item) @markup.heading.2) @markup.heading.marker
+ (#match? @markup.heading.marker "^\\*\\*"))
+((headline item: (item) @markup.heading.1) @markup.heading.marker
+ (#match? @markup.heading.marker "^\\*"))