Go Cleanup Built-in Rules (#265)

polyglot/piranha/Cargo.toml

@@ -44,8 +44,9 @@ tree-sitter-java = { git = "https://github.com/tree-sitter/tree-sitter-java.git"
 tree-sitter-swift = { git = "https://github.com/ketkarameya/tree-sitter-swift.git", branch = "add_parser" }
 tree-sitter-strings = { git = "https://github.com/ketkarameya/tree-sitter-strings.git" }
 tree-sitter-python = { git = "https://github.com/tree-sitter/tree-sitter-python.git" }
-tree-sitter-go = { git = "https://github.com/tree-sitter/tree-sitter-go.git" }
 tree-sitter-typescript = { git = "https://github.com/tree-sitter/tree-sitter-typescript.git" }
+# TODO: tree-sitter-go should be changed either to upstream or Uber main branch
+tree-sitter-go = { git = "https://github.com/uber/tree-sitter-go.git", branch = "expose_statement_list" }
 derive_builder = "0.11.2"
 getset = "0.1.2"
 pyo3 =  "0.17.1"
@@ -54,4 +55,3 @@ pyo3-log = "0.7.0"
 [features]
 extension-module = ["pyo3/extension-module"]
 default = ["extension-module"]
-

polyglot/piranha/src/cleanup_rules/go/edges.toml

@@ -0,0 +1,80 @@
+# Copyright (c) 2022 Uber Technologies, Inc.
+#
+# <p>Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+# except in compliance with the License. You may obtain a copy of the License at
+# <p>http://www.apache.org/licenses/LICENSE-2.0
+#
+# <p>Unless required by applicable law or agreed to in writing, software distributed under the
+# License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+# express or implied. See the License for the specific language governing permissions and
+# limitations under the License.
+
+# The language specific rules in this file are applied after the API specific change has been performed.
+
+# The edges in this file specify the flow between the rules.
+
+[[edges]]
+scope = "Parent"
+from = "replace_expression_with_boolean_literal"
+to = [
+    "boolean_literal_cleanup",
+    "statement_cleanup",
+]
+
+### boolean_literal_cleanup
+[[edges]]
+scope = "Parent"
+from = "boolean_literal_cleanup"
+to = [
+    "boolean_expression_simplify",
+    "statement_cleanup",
+]
+
+[[edges]]
+scope = "Parent"
+from = "boolean_expression_simplify"
+to = ["boolean_literal_cleanup"]
+
+[[edges]]
+scope = "Parent"
+from = "statement_cleanup"
+to = ["if_cleanup"]
+
+### statement_cleanup
+[[edges]]
+scope = "Function-Method"
+from = "statement_cleanup"
+to = ["delete_variable_declaration"]
+
+[[edges]]
+scope = "Function-Method"
+from = "delete_variable_declaration"
+to = ["replace_identifier_with_value"]
+
+[[edges]]
+scope = "Parent"
+from = "replace_identifier_with_value"
+to = ["boolean_literal_cleanup"]
+
+
+### if_cleanup
+[[edges]]
+scope = "Parent"
+from = "if_cleanup"
+to = ["remove_unnecessary_nested_block"]
+
+[[edges]]
+scope = "Parent"
+from = "remove_unnecessary_nested_block"
+to = ["return_statement_cleanup"]
+
+# Cycle to circumvent `delete_statement_after_return` only removing one match at a time
+[[edges]]
+scope = "Parent"
+from = "return_statement_cleanup"
+to = ["delete_statement_after_return"]
+
+[[edges]]
+scope = "Parent"
+from = "delete_statement_after_return"
+to = ["return_statement_cleanup"]