Initial commit

Author: chrislloyd

.gitignore

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+build
+log.html
+node_modules

.prettierrc

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+{
+  "targets": [
+    {
+      "target_name": "tree_sitter_hledger_binding",
+      "include_dirs": [
+        "<!(node -e \"require('nan')\")",
+        "src"
+      ],
+      "sources": [
+        "src/parser.c",
+        "src/binding.cc"
+      ],
+      "cflags_c": [
+        "-std=c99",
+      ]
+    }
+  ]
+}

binding.gyp

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+==================
+Simple
+==================
+
+2019/01/01 Wells Fargo
+  assets:wells      $100
+  ! expenses:beer     $100
+
+---
+
+(source_file
+  (transaction
+    (date
+      (year)
+      (month)
+      (day))
+    (payee)
+    (postings
+      (posting
+        (account)
+        (amount
+          (commodity)
+          (quantity)))
+      (posting
+        (status)
+        (account)
+        (amount
+          (commodity)
+          (quantity))))))

corpus/transactions.txt

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+module.exports = grammar({
+  name: "hledger",
+
+  rules: {
+    source_file: $ => repeat1($.transaction),
+
+    transaction: $ => seq($._entry, "\n", $.postings),
+
+    _entry: $ => seq($.date, optional(seq($.status, /\s+/)), optional($.payee)),
+
+    date: $ => {
+      function createDate(separator) {
+        return seq(optional(seq($.year, separator)), $.month, separator, $.day);
+      }
+      return choice(createDate("-"), createDate("/"), createDate("."));
+    },
+    year: $ => /\d{4}/,
+    month: $ => /\d{2}/,
+    day: $ => /\d{2}/,
+
+    payee: $ => /[^\n;]+/,
+
+    postings: $ => repeat1(seq(/\s{1,}/, $.posting, "\n")),
+    posting: $ =>
+      seq(
+        optional(seq($.status, " ")),
+        $.account,
+        optional(seq(/\s{2,}/, $.amount))
+      ),
+
+    status: $ => choice("*", "!"),
+
+    account: $ => seq($._part, repeat(seq(":", $._part))),
+    _part: $ => /\w+/,
+
+    amount: $ => seq($.commodity, $.quantity),
+
+    // choice(
+    //   $.quantity,
+    //   seq($.commodity, $.quantity), // left commodity
+    //   seq($.quantity, $.commodity) // right commodity
+    // ),
+
+    commodity: $ => /[\w\$]+/,
+    quantity: $ => "100"
+  }
+});

grammar.js

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+try {
+  module.exports = require("./build/Release/tree_sitter_hledger_binding");
+} catch (error) {
+  try {
+    module.exports = require("./build/Debug/tree_sitter_hledger_binding");
+  } catch (_) {
+    throw error;
+  }
+}
+
+try {
+  module.exports.nodeTypeInfo = require("./src/node-types.json");
+} catch (_) {}

index.js

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+{
+  "name": "tree-sitter-ledger",
+  "version": "1.0.0",
+  "main": "index.js",
+  "license": "MIT",
+  "dependencies": {
+    "nan": "^2.14.0"
+  },
+  "devDependencies": {
+    "tree-sitter-cli": "^0.15.8",
+    "prettier": "^1.18.2"
+  }
+}

package.json

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+#include "tree_sitter/parser.h"
+#include <node.h>
+#include "nan.h"
+
+using namespace v8;
+
+extern "C" TSLanguage * tree_sitter_ledger();
+
+namespace {
+
+NAN_METHOD(New) {}
+
+void Init(Local<Object> exports, Local<Object> module) {
+  Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
+  tpl->SetClassName(Nan::New("Language").ToLocalChecked());
+  tpl->InstanceTemplate()->SetInternalFieldCount(1);
+
+  Local<Function> constructor = Nan::GetFunction(tpl).ToLocalChecked();
+  Local<Object> instance = constructor->NewInstance(Nan::GetCurrentContext()).ToLocalChecked();
+  Nan::SetInternalFieldPointer(instance, 0, tree_sitter_ledger());
+
+  Nan::Set(instance, Nan::New("name").ToLocalChecked(), Nan::New("ledger").ToLocalChecked());
+  Nan::Set(module, Nan::New("exports").ToLocalChecked(), instance);
+}
+
+NODE_MODULE(tree_sitter_ledger_binding, Init)
+
+}  // namespace