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>

4 files changed, 67 insertions, 0 deletions

diff --git a/book/src/generated/lang-support.md b/book/src/generated/lang-support.md
index a79f79f0..432efb78 100644
--- a/book/src/generated/lang-support.md
+++ b/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 | ✓ |  |  |  |
diff --git a/languages.toml b/languages.toml
index 287d4534..c1f197aa 100644
--- a/languages.toml
+++ b/languages.toml
@@ -600,6 +600,19 @@ 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"
 injection-regex = "ocaml"
diff --git a/runtime/queries/beancount/folds.scm b/runtime/queries/beancount/folds.scm
new file mode 100644
index 00000000..9f1b6cbe
--- /dev/null
+++ b/runtime/queries/beancount/folds.scm
@@ -0,0 +1,4 @@
+[
+  (transaction)
+  (section)
+] @fold
diff --git a/runtime/queries/beancount/highlights.scm b/runtime/queries/beancount/highlights.scm
new file mode 100644
index 00000000..440a5782
--- /dev/null
+++ b/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 "^\\*"))