add compile workflow

add fuzzing instrumentation

fuzz/fuzzer.cc

@@ -0,0 +1,54 @@
+/*
+* taken from https://raw.githubusercontent.com/tree-sitter/tree-sitter/master/test/fuzz/fuzzer.cc
+*/
+
+#include <cassert>
+#include <fstream>
+#include "tree_sitter/api.h"
+
+extern "C" const TSLanguage *tree_sitter_hcl();
+
+static TSQuery *lang_query;
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  const char *str = reinterpret_cast<const char *>(data);
+
+  TSParser *parser = ts_parser_new();
+
+  // This can fail if the language version doesn't match the runtime version
+  bool language_ok = ts_parser_set_language(parser, tree_sitter_hcl());
+  assert(language_ok);
+
+  TSTree *tree = ts_parser_parse_string(parser, NULL, str, size);
+  TSNode root_node = ts_tree_root_node(tree);
+
+  if (lang_query) {
+    {
+      TSQueryCursor *cursor = ts_query_cursor_new();
+
+      ts_query_cursor_exec(cursor, lang_query, root_node);
+      TSQueryMatch match;
+      while (ts_query_cursor_next_match(cursor, &match)) {
+      }
+
+      ts_query_cursor_delete(cursor);
+    }
+
+    {
+      TSQueryCursor *cursor = ts_query_cursor_new();
+
+      ts_query_cursor_exec(cursor, lang_query, root_node);
+      TSQueryMatch match;
+      uint32_t capture_index;
+      while (ts_query_cursor_next_capture(cursor, &match, &capture_index)) {
+      }
+
+      ts_query_cursor_delete(cursor);
+    }
+  }
+
+  ts_tree_delete(tree);
+  ts_parser_delete(parser);
+
+  return 0;
+}