feat(formatter): initial setup and config handling for formatter

.gitignore

@@ -18,4 +18,5 @@
 
 **/target
 
-.idea
+.idea
+__pycache__

libs/formatter/converter/format.py

@@ -0,0 +1,50 @@
+def node_to_string(node):
+    ast_type = node["ast_type"]
+    if ast_type == "Module":
+        return node_to_string(node["body"])
+    elif ast_type == "FunctionDef":
+        return f"def {node['name']}({node_to_string(node['args'])}):"
+    elif ast_type == "arguments":
+        return ", ".join([node_to_string(arg) for arg in node["args"]])
+    elif ast_type == "arg":
+        return node["arg"]
+    elif ast_type == "Expr":
+        return node_to_string(node["value"])
+    elif ast_type == "Call":
+        return f"{node_to_string(node['func'])}({node_to_string(node['args'])})"
+    elif ast_type == "Name":
+        return node["id"]
+    elif ast_type == "Constant":
+        return str(node["value"])
+    elif ast_type == "BinOp":
+        return f"{node_to_string(node['left'])} {node['op']} {node_to_string(node['right'])}"
+    elif ast_type == "Return":
+        return f"return {node_to_string(node['value'])}"
+    elif ast_type == "Assign":
+        return f"{node_to_string(node['targets'])} = {node_to_string(node['value'])}"
+    elif ast_type == "List":
+        return f"[{node_to_string(node['elts'])}]"
+    elif ast_type == "Subscript":
+        return f"{node_to_string(node['value'])}[{node_to_string(node['slice'])}]"
+    elif ast_type == "Index":
+        return node_to_string(node["value"])
+    elif ast_type == "Slice":
+        return f"{node_to_string(node['lower'])}:{node_to_string(node['upper'])}"
+    elif ast_type == "Attribute":
+        return f"{node_to_string(node['value'])}.{node['attr']}"
+    elif ast_type == "If":
+        return f"if {node_to_string(node['test'])}:"
+    elif ast_type == "Compare":
+        return f"{node_to_string(node['left'])} {node_to_string(node['ops'])} {node_to_string(node['comparators'])}"
+    elif ast_type == "Eq":
+        return "=="
+    elif ast_type == "Gt":
+        return ">"
+    elif ast_type == "Lt":
+        return "<"
+    elif ast_type == "GtE":
+        return ">="
+
+def convert_ast_to_string(ast, config):
+    ## Handle the config and ast tabs
+    return node_to_string(ast["ast"])

libs/formatter/converter/format2.py

@@ -0,0 +1,2 @@
+def convert_ast_to_string(ast, config):
+    return ""

libs/formatter/formatter/lib.py

@@ -0,0 +1,42 @@
+from ast_extractor.ast import filepath_vyper_to_ast
+from converter.format2 import convert_ast_to_string
+from difflib import unified_diff
+import os
+
+def diff_files(original, formatted):
+    original_lines = original.splitlines()
+    formatted_lines = formatted.splitlines()
+
+    diff = unified_diff(original_lines, formatted_lines, lineterm='')
+    return '\n'.join(list(diff))
+
+def format_file(file_path, config, check, raw):
+    ast = filepath_vyper_to_ast(file_path)
+    if ast is not None:
+        formatted_code = convert_ast_to_string(ast, config)
+        if check:
+            with open(file_path) as reader:
+                if raw:
+                    return formatted_code
+                else:
+                    original_code = reader.read()
+                    diff = diff_files(original_code, formatted_code)
+                    if diff != "":
+                        return diff
+        else:
+            with open(file_path, "w") as writer:
+                writer.write(formatted_code)
+
+def format_root(root, config, check, raw):
+    output = []
+    if os.path.isdir(root):
+        for root, _, files in os.walk(root):
+            for file in files:
+                if file.endswith(".vy"):
+                    file_path = os.path.join(root, file)
+                    output_file = format_file(file_path, config, check, raw)
+                    if output_file is not None:
+                        output.append({"filename": file_path, "output": output_file})
+    else:
+        raise ValueError("Root path is not a directory")
+    return output

libs/formatter/formatter/main.py

@@ -0,0 +1,31 @@
+import argparse
+import os
+
+from rules.config import init_config
+from .lib import format_root
+
+def start() -> None:
+    parser = argparse.ArgumentParser(description='Vyper Formatter')
+    parser.add_argument('--root', type=str, help="The project's root path to format\n\nBy default root of the current working directory", default=".")
+    parser.add_argument('--check', action='store_true', help="Run in 'check' mode.\n\nExits with 0 if input is formatted correctly. Exits with 1 if formatting is required", default=False)
+    parser.add_argument('--raw', action='store_true', help="In 'check' and stdin modes, outputs raw formatted code instead of the diff", default=False)
+    parser.add_argument('--config', type=str, help="Path to the configuration file\n\nBy default search for a `vyfmt.toml` inside the defined root", default=None)
+    args = parser.parse_args()
+
+    # Read root directory and check if it exists
+    if not os.path.exists(args.root):
+        print(f"Error: Root path '{args.root}' does not exist")
+        exit(1)
+
+    config = init_config(args.root, args.config)
+    output = format_root(args.root, config, args.check, args.raw)
+
+    if args.check:
+        if len(output) != 0:
+            for file in output:
+                print(file["filename"])
+                print(file["output"])
+                print()
+            exit(1)
+        else:
+            exit(0)

libs/formatter/pyproject.toml

@@ -0,0 +1,19 @@
+[tool.poetry]
+name = "formatter"
+version = "0.1.0"
+description = ""
+authors = ["0xtekgrinder <0xtekgrinder@protonmail.com>"]
+readme = "README.md"
+
+[tool.poetry.dependencies]
+python = "^3.10"
+ast-extractor = {path = "../../libs/ast-extractor"}
+tomli = "^2.0.1"
+
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"
+
+[tool.poetry.scripts]
+start = "formatter.main:start"

libs/formatter/rules/config.py

@@ -0,0 +1,39 @@
+import os
+import tomli
+
+rules_types = [
+    { "field": "indentation", "type": int, "default": 4 }
+]
+
+def init_config(root, config_file):
+    if config_file is None:
+        config_file = os.path.join(root, 'vyfmt.toml')
+
+    config = {}
+    modified_fields = []
+    if os.path.exists(config_file):
+        with open(config_file) as reader:
+            content = reader.read()
+            parsed_file = tomli.loads(content)
+
+            for rule in rules_types:
+                field = rule["field"]
+                if field in parsed_file:
+                    if type(parsed_file[field]) != rule["type"]:
+                        raise TypeError(f"Field '{field}' in configuration file is not of type '{rule['type']}'")
+                    else:
+                        config[field] = parsed_file[field]
+                        modified_fields.append(field)
+
+    for rule in rules_types:
+        field = rule["field"]
+        if field not in modified_fields:
+            config[field] = rule["default"]
+
+    return config
+
+
+
+
+
+