Lint the script folder files (#5991)

script/api_protobuf/api_protobuf.py

@@ -17,28 +17,22 @@ then run this script with python3 and the files
 will be generated, they still need to be formatted
 """
 
-import re
 import os
+import re
+import sys
+from abc import ABC, abstractmethod
 from pathlib import Path
-from textwrap import dedent
 from subprocess import call
+from textwrap import dedent
 
 # Generate with
 # protoc --python_out=script/api_protobuf -I esphome/components/api/ api_options.proto
-
 import aioesphomeapi.api_options_pb2 as pb
 import google.protobuf.descriptor_pb2 as descriptor
 
-file_header = "// This file was automatically generated with a tool.\n"
+FILE_HEADER = """// This file was automatically generated with a tool.
-file_header += "// See scripts/api_protobuf/api_protobuf.py\n"
+// See scripts/api_protobuf/api_protobuf.py
-
+"""
-cwd = Path(__file__).resolve().parent
-root = cwd.parent.parent / "esphome" / "components" / "api"
-prot = root / "api.protoc"
-call(["protoc", "-o", str(prot), "-I", str(root), "api.proto"])
-content = prot.read_bytes()
-
-d = descriptor.FileDescriptorSet.FromString(content)
 
 
 def indent_list(text, padding="  "):
@@ -64,7 +58,7 @@ def camel_to_snake(name):
     return re.sub("([a-z0-9])([A-Z])", r"\1_\2", s1).lower()
 
 
-class TypeInfo:
+class TypeInfo(ABC):
     def __init__(self, field):
         self._field = field
 
@@ -186,10 +180,12 @@ class TypeInfo:
     def dump_content(self):
         o = f'out.append("  {self.name}: ");\n'
         o += self.dump(f"this->{self.field_name}") + "\n"
-        o += f'out.append("\\n");\n'
+        o += 'out.append("\\n");\n'
         return o
 
-    dump = None
+    @abstractmethod
+    def dump(self, name: str):
+        pass
 
 
 TYPE_INFO = {}
@@ -212,7 +208,7 @@ class DoubleType(TypeInfo):
 
     def dump(self, name):
         o = f'sprintf(buffer, "%g", {name});\n'
-        o += f"out.append(buffer);"
+        o += "out.append(buffer);"
         return o
 
 
@@ -225,7 +221,7 @@ class FloatType(TypeInfo):
 
     def dump(self, name):
         o = f'sprintf(buffer, "%g", {name});\n'
-        o += f"out.append(buffer);"
+        o += "out.append(buffer);"
         return o
 
 
@@ -238,7 +234,7 @@ class Int64Type(TypeInfo):
 
     def dump(self, name):
         o = f'sprintf(buffer, "%lld", {name});\n'
-        o += f"out.append(buffer);"
+        o += "out.append(buffer);"
         return o
 
 
@@ -251,7 +247,7 @@ class UInt64Type(TypeInfo):
 
     def dump(self, name):
         o = f'sprintf(buffer, "%llu", {name});\n'
-        o += f"out.append(buffer);"
+        o += "out.append(buffer);"
         return o
 
 
@@ -264,7 +260,7 @@ class Int32Type(TypeInfo):
 
     def dump(self, name):
         o = f'sprintf(buffer, "%" PRId32, {name});\n'
-        o += f"out.append(buffer);"
+        o += "out.append(buffer);"
         return o
 
 
@@ -277,7 +273,7 @@ class Fixed64Type(TypeInfo):
 
     def dump(self, name):
         o = f'sprintf(buffer, "%llu", {name});\n'
-        o += f"out.append(buffer);"
+        o += "out.append(buffer);"
         return o
 
 
@@ -290,7 +286,7 @@ class Fixed32Type(TypeInfo):
 
     def dump(self, name):
         o = f'sprintf(buffer, "%" PRIu32, {name});\n'
-        o += f"out.append(buffer);"
+        o += "out.append(buffer);"
         return o
 
 
@@ -372,7 +368,7 @@ class UInt32Type(TypeInfo):
 
     def dump(self, name):
         o = f'sprintf(buffer, "%" PRIu32, {name});\n'
-        o += f"out.append(buffer);"
+        o += "out.append(buffer);"
         return o
 
 
@@ -406,7 +402,7 @@ class SFixed32Type(TypeInfo):
 
     def dump(self, name):
         o = f'sprintf(buffer, "%" PRId32, {name});\n'
-        o += f"out.append(buffer);"
+        o += "out.append(buffer);"
         return o
 
 
@@ -419,7 +415,7 @@ class SFixed64Type(TypeInfo):
 
     def dump(self, name):
         o = f'sprintf(buffer, "%lld", {name});\n'
-        o += f"out.append(buffer);"
+        o += "out.append(buffer);"
         return o
 
 
@@ -432,7 +428,7 @@ class SInt32Type(TypeInfo):
 
     def dump(self, name):
         o = f'sprintf(buffer, "%" PRId32, {name});\n'
-        o += f"out.append(buffer);"
+        o += "out.append(buffer);"
         return o
 
 
@@ -445,7 +441,7 @@ class SInt64Type(TypeInfo):
 
     def dump(self, name):
         o = f'sprintf(buffer, "%lld", {name});\n'
-        o += f"out.append(buffer);"
+        o += "out.append(buffer);"
         return o
 
 
@@ -527,7 +523,7 @@ class RepeatedTypeInfo(TypeInfo):
     def encode_content(self):
         o = f"for (auto {'' if self._ti_is_bool else '&'}it : this->{self.field_name}) {{\n"
         o += f"  buffer.{self._ti.encode_func}({self.number}, it, true);\n"
-        o += f"}}"
+        o += "}"
         return o
 
     @property
@@ -535,10 +531,13 @@ class RepeatedTypeInfo(TypeInfo):
         o = f'for (const auto {"" if self._ti_is_bool else "&"}it : this->{self.field_name}) {{\n'
         o += f'  out.append("  {self.name}: ");\n'
         o += indent(self._ti.dump("it")) + "\n"
-        o += f'  out.append("\\n");\n'
+        o += '  out.append("\\n");\n'
-        o += f"}}\n"
+        o += "}\n"
         return o
 
+    def dump(self, _: str):
+        pass
+
 
 def build_enum_type(desc):
     name = desc.name
@@ -547,17 +546,17 @@ def build_enum_type(desc):
         out += f"  {v.name} = {v.number},\n"
     out += "};\n"
 
-    cpp = f"#ifdef HAS_PROTO_MESSAGE_DUMP\n"
+    cpp = "#ifdef HAS_PROTO_MESSAGE_DUMP\n"
     cpp += f"template<> const char *proto_enum_to_string<enums::{name}>(enums::{name} value) {{\n"
-    cpp += f"  switch (value) {{\n"
+    cpp += "  switch (value) {\n"
     for v in desc.value:
         cpp += f"    case enums::{v.name}:\n"
         cpp += f'      return "{v.name}";\n'
-    cpp += f"    default:\n"
+    cpp += "    default:\n"
-    cpp += f'      return "UNKNOWN";\n'
+    cpp += '      return "UNKNOWN";\n'
-    cpp += f"  }}\n"
+    cpp += "  }\n"
-    cpp += f"}}\n"
+    cpp += "}\n"
-    cpp += f"#endif\n"
+    cpp += "#endif\n"
 
     return out, cpp
 
@@ -652,10 +651,10 @@ def build_message_type(desc):
             o += f" {dump[0]} "
         else:
             o += "\n"
-            o += f"  __attribute__((unused)) char buffer[64];\n"
+            o += "  __attribute__((unused)) char buffer[64];\n"
             o += f'  out.append("{desc.name} {{\\n");\n'
             o += indent("\n".join(dump)) + "\n"
-            o += f'  out.append("}}");\n'
+            o += '  out.append("}");\n'
     else:
         o2 = f'out.append("{desc.name} {{}}");'
         if len(o) + len(o2) + 3 < 120:
@@ -664,9 +663,9 @@ def build_message_type(desc):
             o += "\n"
             o += f"  {o2}\n"
     o += "}\n"
-    cpp += f"#ifdef HAS_PROTO_MESSAGE_DUMP\n"
+    cpp += "#ifdef HAS_PROTO_MESSAGE_DUMP\n"
     cpp += o
-    cpp += f"#endif\n"
+    cpp += "#endif\n"
     prot = "#ifdef HAS_PROTO_MESSAGE_DUMP\n"
     prot += "void dump_to(std::string &out) const override;\n"
     prot += "#endif\n"
@@ -684,8 +683,89 @@ def build_message_type(desc):
     return out, cpp
 
 
+SOURCE_BOTH = 0
+SOURCE_SERVER = 1
+SOURCE_CLIENT = 2
+
+RECEIVE_CASES = {}
+
+ifdefs = {}
+
+
+def get_opt(desc, opt, default=None):
+    if not desc.options.HasExtension(opt):
+        return default
+    return desc.options.Extensions[opt]
+
+
+def build_service_message_type(mt):
+    snake = camel_to_snake(mt.name)
+    id_ = get_opt(mt, pb.id)
+    if id_ is None:
+        return None
+
+    source = get_opt(mt, pb.source, 0)
+
+    ifdef = get_opt(mt, pb.ifdef)
+    log = get_opt(mt, pb.log, True)
+    hout = ""
+    cout = ""
+
+    if ifdef is not None:
+        ifdefs[str(mt.name)] = ifdef
+        hout += f"#ifdef {ifdef}\n"
+        cout += f"#ifdef {ifdef}\n"
+
+    if source in (SOURCE_BOTH, SOURCE_SERVER):
+        # Generate send
+        func = f"send_{snake}"
+        hout += f"bool {func}(const {mt.name} &msg);\n"
+        cout += f"bool APIServerConnectionBase::{func}(const {mt.name} &msg) {{\n"
+        if log:
+            cout += "#ifdef HAS_PROTO_MESSAGE_DUMP\n"
+            cout += f'  ESP_LOGVV(TAG, "{func}: %s", msg.dump().c_str());\n'
+            cout += "#endif\n"
+        # cout += f'  this->set_nodelay({str(nodelay).lower()});\n'
+        cout += f"  return this->send_message_<{mt.name}>(msg, {id_});\n"
+        cout += "}\n"
+    if source in (SOURCE_BOTH, SOURCE_CLIENT):
+        # Generate receive
+        func = f"on_{snake}"
+        hout += f"virtual void {func}(const {mt.name} &value){{}};\n"
+        case = ""
+        if ifdef is not None:
+            case += f"#ifdef {ifdef}\n"
+        case += f"{mt.name} msg;\n"
+        case += "msg.decode(msg_data, msg_size);\n"
+        if log:
+            case += "#ifdef HAS_PROTO_MESSAGE_DUMP\n"
+            case += f'ESP_LOGVV(TAG, "{func}: %s", msg.dump().c_str());\n'
+            case += "#endif\n"
+        case += f"this->{func}(msg);\n"
+        if ifdef is not None:
+            case += "#endif\n"
+        case += "break;"
+        RECEIVE_CASES[id_] = case
+
+    if ifdef is not None:
+        hout += "#endif\n"
+        cout += "#endif\n"
+
+    return hout, cout
+
+
+def main():
+    cwd = Path(__file__).resolve().parent
+    root = cwd.parent.parent / "esphome" / "components" / "api"
+    prot_file = root / "api.protoc"
+    call(["protoc", "-o", str(prot_file), "-I", str(root), "api.proto"])
+    proto_content = prot_file.read_bytes()
+
+    # pylint: disable-next=no-member
+    d = descriptor.FileDescriptorSet.FromString(proto_content)
+
     file = d.file[0]
-content = file_header
+    content = FILE_HEADER
     content += """\
     #pragma once
 
@@ -696,7 +776,7 @@ namespace api {
 
     """
 
-cpp = file_header
+    cpp = FILE_HEADER
     cpp += """\
     #include "api_pb2.h"
     #include "esphome/core/log.h"
@@ -735,87 +815,13 @@ cpp += """\
     }  // namespace esphome
     """
 
-with open(root / "api_pb2.h", "w") as f:
+    with open(root / "api_pb2.h", "w", encoding="utf-8") as f:
         f.write(content)
 
-with open(root / "api_pb2.cpp", "w") as f:
+    with open(root / "api_pb2.cpp", "w", encoding="utf-8") as f:
         f.write(cpp)
 
-SOURCE_BOTH = 0
+    hpp = FILE_HEADER
-SOURCE_SERVER = 1
-SOURCE_CLIENT = 2
-
-RECEIVE_CASES = {}
-
-class_name = "APIServerConnectionBase"
-
-ifdefs = {}
-
-
-def get_opt(desc, opt, default=None):
-    if not desc.options.HasExtension(opt):
-        return default
-    return desc.options.Extensions[opt]
-
-
-def build_service_message_type(mt):
-    snake = camel_to_snake(mt.name)
-    id_ = get_opt(mt, pb.id)
-    if id_ is None:
-        return None
-
-    source = get_opt(mt, pb.source, 0)
-
-    ifdef = get_opt(mt, pb.ifdef)
-    log = get_opt(mt, pb.log, True)
-    nodelay = get_opt(mt, pb.no_delay, False)
-    hout = ""
-    cout = ""
-
-    if ifdef is not None:
-        ifdefs[str(mt.name)] = ifdef
-        hout += f"#ifdef {ifdef}\n"
-        cout += f"#ifdef {ifdef}\n"
-
-    if source in (SOURCE_BOTH, SOURCE_SERVER):
-        # Generate send
-        func = f"send_{snake}"
-        hout += f"bool {func}(const {mt.name} &msg);\n"
-        cout += f"bool {class_name}::{func}(const {mt.name} &msg) {{\n"
-        if log:
-            cout += f"#ifdef HAS_PROTO_MESSAGE_DUMP\n"
-            cout += f'  ESP_LOGVV(TAG, "{func}: %s", msg.dump().c_str());\n'
-            cout += f"#endif\n"
-        # cout += f'  this->set_nodelay({str(nodelay).lower()});\n'
-        cout += f"  return this->send_message_<{mt.name}>(msg, {id_});\n"
-        cout += f"}}\n"
-    if source in (SOURCE_BOTH, SOURCE_CLIENT):
-        # Generate receive
-        func = f"on_{snake}"
-        hout += f"virtual void {func}(const {mt.name} &value){{}};\n"
-        case = ""
-        if ifdef is not None:
-            case += f"#ifdef {ifdef}\n"
-        case += f"{mt.name} msg;\n"
-        case += f"msg.decode(msg_data, msg_size);\n"
-        if log:
-            case += f"#ifdef HAS_PROTO_MESSAGE_DUMP\n"
-            case += f'ESP_LOGVV(TAG, "{func}: %s", msg.dump().c_str());\n'
-            case += f"#endif\n"
-        case += f"this->{func}(msg);\n"
-        if ifdef is not None:
-            case += f"#endif\n"
-        case += "break;"
-        RECEIVE_CASES[id_] = case
-
-    if ifdef is not None:
-        hout += f"#endif\n"
-        cout += f"#endif\n"
-
-    return hout, cout
-
-
-hpp = file_header
     hpp += """\
     #pragma once
 
@@ -827,7 +833,7 @@ namespace api {
 
     """
 
-cpp = file_header
+    cpp = FILE_HEADER
     cpp += """\
     #include "api_pb2_service.h"
     #include "esphome/core/log.h"
@@ -839,6 +845,8 @@ static const char *const TAG = "api.service";
 
     """
 
+    class_name = "APIServerConnectionBase"
+
     hpp += f"class {class_name} : public ProtoService {{\n"
     hpp += " public:\n"
 
@@ -853,13 +861,13 @@ for mt in file.message_type:
     cases = list(RECEIVE_CASES.items())
     cases.sort()
     hpp += " protected:\n"
-hpp += f"  bool read_message(uint32_t msg_size, uint32_t msg_type, uint8_t *msg_data) override;\n"
+    hpp += "  bool read_message(uint32_t msg_size, uint32_t msg_type, uint8_t *msg_data) override;\n"
     out = f"bool {class_name}::read_message(uint32_t msg_size, uint32_t msg_type, uint8_t *msg_data) {{\n"
-out += f"  switch (msg_type) {{\n"
+    out += "  switch (msg_type) {\n"
     for i, case in cases:
         c = f"case {i}: {{\n"
         c += indent(case) + "\n"
-    c += f"}}"
+        c += "}"
         out += indent(c, "    ") + "\n"
     out += "    default:\n"
     out += "      return false;\n"
@@ -916,14 +924,14 @@ for m in serv.method:
             body += f"{ret} ret = this->{func}(msg);\n"
             ret_snake = camel_to_snake(ret)
             body += f"if (!this->send_{ret_snake}(ret)) {{\n"
-        body += f"  this->on_fatal_error();\n"
+            body += "  this->on_fatal_error();\n"
             body += "}\n"
         cpp += indent(body) + "\n" + "}\n"
 
         if ifdef is not None:
-        hpp += f"#endif\n"
+            hpp += "#endif\n"
-        hpp_protected += f"#endif\n"
+            hpp_protected += "#endif\n"
-        cpp += f"#endif\n"
+            cpp += "#endif\n"
 
     hpp += " protected:\n"
     hpp += hpp_protected
@@ -940,13 +948,13 @@ cpp += """\
     }  // namespace esphome
     """
 
-with open(root / "api_pb2_service.h", "w") as f:
+    with open(root / "api_pb2_service.h", "w", encoding="utf-8") as f:
         f.write(hpp)
 
-with open(root / "api_pb2_service.cpp", "w") as f:
+    with open(root / "api_pb2_service.cpp", "w", encoding="utf-8") as f:
         f.write(cpp)
 
-prot.unlink()
+    prot_file.unlink()
 
     try:
         import clang_format
@@ -963,3 +971,7 @@ try:
         exec_clang_format(root / "api_pb2.cpp")
     except ImportError:
         pass
+
+
+if __name__ == "__main__":
+    sys.exit(main())

script/build_language_schema.py

@@ -61,6 +61,7 @@ solve_registry = []
 
 
 def get_component_names():
+    # pylint: disable-next=redefined-outer-name,reimported
     from esphome.loader import CORE_COMPONENTS_PATH
 
     component_names = ["esphome", "sensor", "esp32", "esp8266"]
@@ -82,9 +83,12 @@ def load_components():
         components[domain] = get_component(domain)
 
 
+# pylint: disable=wrong-import-position
 from esphome.const import CONF_TYPE, KEY_CORE
 from esphome.core import CORE
 
+# pylint: enable=wrong-import-position
+
 CORE.data[KEY_CORE] = {}
 load_components()
 
@@ -114,7 +118,7 @@ def write_file(name, obj):
 
 def delete_extra_files(keep_names):
     for d in os.listdir(args.output_path):
-        if d.endswith(".json") and not d[:-5] in keep_names:
+        if d.endswith(".json") and d[:-5] not in keep_names:
             os.remove(os.path.join(args.output_path, d))
             print(f"Deleted {d}")
 
@@ -552,11 +556,11 @@ def shrink():
             s = f"{domain}.{schema_name}"
             if (
                 not s.endswith("." + S_CONFIG_SCHEMA)
-                and s not in referenced_schemas.keys()
+                and s not in referenced_schemas
                 and not is_platform_schema(s)
             ):
                 print(f"Removing {s}")
-                output[domain][S_SCHEMAS].pop(schema_name)
+                domain_schemas[S_SCHEMAS].pop(schema_name)
 
 
 def build_schema():
@@ -564,7 +568,7 @@ def build_schema():
 
     # check esphome was not loaded globally (IDE auto imports)
     if len(ejs.extended_schemas) == 0:
-        raise Exception(
+        raise LookupError(
             "no data collected. Did you globally import an ESPHome component?"
         )
 
@@ -703,7 +707,7 @@ def convert(schema, config_var, path):
             if schema_instance is schema:
                 assert S_CONFIG_VARS not in config_var
                 assert S_EXTENDS not in config_var
-                if not S_TYPE in config_var:
+                if S_TYPE not in config_var:
                     config_var[S_TYPE] = S_SCHEMA
                 # assert config_var[S_TYPE] == S_SCHEMA
 
@@ -765,9 +769,9 @@ def convert(schema, config_var, path):
     elif schema == automation.validate_potentially_and_condition:
         config_var[S_TYPE] = "registry"
         config_var["registry"] = "condition"
-    elif schema == cv.int_ or schema == cv.int_range:
+    elif schema in (cv.int_, cv.int_range):
         config_var[S_TYPE] = "integer"
-    elif schema == cv.string or schema == cv.string_strict or schema == cv.valid_name:
+    elif schema in (cv.string, cv.string_strict, cv.valid_name):
         config_var[S_TYPE] = "string"
 
     elif isinstance(schema, vol.Schema):
@@ -779,6 +783,7 @@ def convert(schema, config_var, path):
         config_var |= pin_validators[repr_schema]
         config_var[S_TYPE] = "pin"
 
+    # pylint: disable-next=too-many-nested-blocks
     elif repr_schema in ejs.hidden_schemas:
         schema_type = ejs.hidden_schemas[repr_schema]
 
@@ -869,7 +874,7 @@ def convert(schema, config_var, path):
                     config_var["use_id_type"] = str(data.base)
                     config_var[S_TYPE] = "use_id"
         else:
-            raise Exception("Unknown extracted schema type")
+            raise TypeError("Unknown extracted schema type")
     elif config_var.get("key") == "GeneratedID":
         if path.startswith("i2c/CONFIG_SCHEMA/") and path.endswith("/id"):
             config_var["id_type"] = {
@@ -884,7 +889,7 @@ def convert(schema, config_var, path):
         elif path == "pins/esp32/val 1/id":
             config_var["id_type"] = "pin"
         else:
-            raise Exception("Cannot determine id_type for " + path)
+            raise TypeError("Cannot determine id_type for " + path)
 
     elif repr_schema in ejs.registry_schemas:
         solve_registry.append((ejs.registry_schemas[repr_schema], config_var))
@@ -948,11 +953,7 @@ def convert_keys(converted, schema, path):
             result["key"] = "GeneratedID"
         elif isinstance(k, cv.Required):
             result["key"] = "Required"
-        elif (
+        elif isinstance(k, (cv.Optional, cv.Inclusive, cv.Exclusive)):
-            isinstance(k, cv.Optional)
-            or isinstance(k, cv.Inclusive)
-            or isinstance(k, cv.Exclusive)
-        ):
             result["key"] = "Optional"
         else:
             converted["key"] = "String"

script/bump-version.py

@@ -2,7 +2,6 @@
 
 import argparse
 import re
-import subprocess
 from dataclasses import dataclass
 import sys
 
@@ -40,12 +39,12 @@ class Version:
 
 
 def sub(path, pattern, repl, expected_count=1):
-    with open(path) as fh:
+    with open(path, encoding="utf-8") as fh:
         content = fh.read()
     content, count = re.subn(pattern, repl, content, flags=re.MULTILINE)
     if expected_count is not None:
         assert count == expected_count, f"Pattern {pattern} replacement failed!"
-    with open(path, "w") as fh:
+    with open(path, "w", encoding="utf-8") as fh:
         fh.write(content)
 
 

script/ci-custom.py

@@ -1,10 +1,8 @@
 #!/usr/bin/env python3
 
-from helpers import styled, print_error_for_file, git_ls_files, filter_changed
 import argparse
 import codecs
 import collections
-import colorama
 import fnmatch
 import functools
 import os.path
@@ -12,6 +10,9 @@ import re
 import sys
 import time
 
+import colorama
+from helpers import filter_changed, git_ls_files, print_error_for_file, styled
+
 sys.path.append(os.path.dirname(__file__))
 
 
@@ -30,31 +31,6 @@ def find_all(a_str, sub):
             column += len(sub)
 
 
-colorama.init()
-
-parser = argparse.ArgumentParser()
-parser.add_argument(
-    "files", nargs="*", default=[], help="files to be processed (regex on path)"
-)
-parser.add_argument(
-    "-c", "--changed", action="store_true", help="Only run on changed files"
-)
-parser.add_argument(
-    "--print-slowest", action="store_true", help="Print the slowest checks"
-)
-args = parser.parse_args()
-
-EXECUTABLE_BIT = git_ls_files()
-files = list(EXECUTABLE_BIT.keys())
-# Match against re
-file_name_re = re.compile("|".join(args.files))
-files = [p for p in files if file_name_re.search(p)]
-
-if args.changed:
-    files = filter_changed(files)
-
-files.sort()
-
 file_types = (
     ".h",
     ".c",
@@ -86,6 +62,30 @@ ignore_types = (".ico", ".png", ".woff", ".woff2", "")
 LINT_FILE_CHECKS = []
 LINT_CONTENT_CHECKS = []
 LINT_POST_CHECKS = []
+EXECUTABLE_BIT = {}
+
+errors = collections.defaultdict(list)
+
+
+def add_errors(fname, errs):
+    if not isinstance(errs, list):
+        errs = [errs]
+    for err in errs:
+        if err is None:
+            continue
+        try:
+            lineno, col, msg = err
+        except ValueError:
+            lineno = 1
+            col = 1
+            msg = err
+        if not isinstance(msg, str):
+            raise ValueError("Error is not instance of string!")
+        if not isinstance(lineno, int):
+            raise ValueError("Line number is not an int!")
+        if not isinstance(col, int):
+            raise ValueError("Column number is not an int!")
+        errors[fname].append((lineno, col, msg))
 
 
 def run_check(lint_obj, fname, *args):
@@ -155,7 +155,7 @@ def lint_re_check(regex, **kwargs):
     def decorator(func):
         @functools.wraps(func)
         def new_func(fname, content):
-            errors = []
+            errs = []
             for match in prog.finditer(content):
                 if "NOLINT" in match.group(0):
                     continue
@@ -165,8 +165,8 @@ def lint_re_check(regex, **kwargs):
                 err = func(fname, match)
                 if err is None:
                     continue
-                errors.append((lineno, col + 1, err))
+                errs.append((lineno, col + 1, err))
-            return errors
+            return errs
 
         return decor(new_func)
 
@@ -182,13 +182,13 @@ def lint_content_find_check(find, only_first=False, **kwargs):
             find_ = find
             if callable(find):
                 find_ = find(fname, content)
-            errors = []
+            errs = []
             for line, col in find_all(content, find_):
                 err = func(fname)
-                errors.append((line + 1, col + 1, err))
+                errs.append((line + 1, col + 1, err))
                 if only_first:
                     break
-            return errors
+            return errs
 
         return decor(new_func)
 
@@ -235,8 +235,8 @@ def lint_executable_bit(fname):
     ex = EXECUTABLE_BIT[fname]
     if ex != 100644:
         return (
-            "File has invalid executable bit {}. If running from a windows machine please "
+            f"File has invalid executable bit {ex}. If running from a windows machine please "
-            "see disabling executable bit in git.".format(ex)
+            "see disabling executable bit in git."
         )
     return None
 
@@ -285,8 +285,8 @@ def lint_no_defines(fname, match):
     s = highlight(f"static const uint8_t {match.group(1)} = {match.group(2)};")
     return (
         "#define macros for integer constants are not allowed, please use "
-        "{} style instead (replace uint8_t with the appropriate "
+        f"{s} style instead (replace uint8_t with the appropriate "
-        "datatype). See also Google style guide.".format(s)
+        "datatype). See also Google style guide."
     )
 
 
@@ -296,11 +296,11 @@ def lint_no_long_delays(fname, match):
     if duration_ms < 50:
         return None
     return (
-        "{} - long calls to delay() are not allowed in ESPHome because everything executes "
+        f"{highlight(match.group(0).strip())} - long calls to delay() are not allowed "
-        "in one thread. Calling delay() will block the main thread and slow down ESPHome.\n"
+        "in ESPHome because everything executes in one thread. Calling delay() will "
+        "block the main thread and slow down ESPHome.\n"
         "If there's no way to work around the delay() and it doesn't execute often, please add "
         "a '// NOLINT' comment to the line."
-        "".format(highlight(match.group(0).strip()))
     )
 
 
@@ -311,28 +311,28 @@ def lint_const_ordered(fname, content):
     Reason: Otherwise people add it to the end, and then that results in merge conflicts.
     """
     lines = content.splitlines()
-    errors = []
+    errs = []
     for start in ["CONF_", "ICON_", "UNIT_"]:
         matching = [
             (i + 1, line) for i, line in enumerate(lines) if line.startswith(start)
         ]
         ordered = list(sorted(matching, key=lambda x: x[1].replace("_", " ")))
         ordered = [(mi, ol) for (mi, _), (_, ol) in zip(matching, ordered)]
-        for (mi, ml), (oi, ol) in zip(matching, ordered):
+        for (mi, mline), (_, ol) in zip(matching, ordered):
-            if ml == ol:
+            if mline == ol:
                 continue
-            target = next(i for i, l in ordered if l == ml)
+            target = next(i for i, line in ordered if line == mline)
-            target_text = next(l for i, l in matching if target == i)
+            target_text = next(line for i, line in matching if target == i)
-            errors.append(
+            errs.append(
                 (
                     mi,
                     1,
-                    f"Constant {highlight(ml)} is not ordered, please make sure all "
+                    f"Constant {highlight(mline)} is not ordered, please make sure all "
                     f"constants are ordered. See line {mi} (should go to line {target}, "
                     f"{target_text})",
                 )
             )
-    return errors
+    return errs
 
 
 @lint_re_check(r'^\s*CONF_([A-Z_0-9a-z]+)\s+=\s+[\'"](.*?)[\'"]\s*?$', include=["*.py"])
@@ -344,15 +344,14 @@ def lint_conf_matches(fname, match):
     if const_norm == value_norm:
         return None
     return (
-        "Constant {} does not match value {}! Please make sure the constant's name matches its "
+        f"Constant {highlight('CONF_' + const)} does not match value {highlight(value)}! "
-        "value!"
+        "Please make sure the constant's name matches its value!"
-        "".format(highlight("CONF_" + const), highlight(value))
     )
 
 
 CONF_RE = r'^(CONF_[a-zA-Z0-9_]+)\s*=\s*[\'"].*?[\'"]\s*?$'
-with codecs.open("esphome/const.py", "r", encoding="utf-8") as f_handle:
+with codecs.open("esphome/const.py", "r", encoding="utf-8") as const_f_handle:
-    constants_content = f_handle.read()
+    constants_content = const_f_handle.read()
 CONSTANTS = [m.group(1) for m in re.finditer(CONF_RE, constants_content, re.MULTILINE)]
 
 CONSTANTS_USES = collections.defaultdict(list)
@@ -365,8 +364,8 @@ def lint_conf_from_const_py(fname, match):
         CONSTANTS_USES[name].append(fname)
         return None
     return (
-        "Constant {} has already been defined in const.py - please import the constant from "
+        f"Constant {highlight(name)} has already been defined in const.py - "
-        "const.py directly.".format(highlight(name))
+        "please import the constant from const.py directly."
     )
 
 
@@ -473,16 +472,15 @@ def lint_no_byte_datatype(fname, match):
 
 @lint_post_check
 def lint_constants_usage():
-    errors = []
+    errs = []
     for constant, uses in CONSTANTS_USES.items():
         if len(uses) < 4:
             continue
-        errors.append(
+        errs.append(
-            "Constant {} is defined in {} files. Please move all definitions of the "
+            f"Constant {highlight(constant)} is defined in {len(uses)} files. Please move all definitions of the "
-            "constant to const.py (Uses: {})"
+            f"constant to const.py (Uses: {', '.join(uses)})"
-            "".format(highlight(constant), len(uses), ", ".join(uses))
         )
-    return errors
+    return errs
 
 
 def relative_cpp_search_text(fname, content):
@@ -553,7 +551,7 @@ def lint_namespace(fname, content):
     return (
         "Invalid namespace found in C++ file. All integration C++ files should put all "
         "functions in a separate namespace that matches the integration's name. "
-        "Please make sure the file contains {}".format(highlight(search))
+        f"Please make sure the file contains {highlight(search)}"
     )
 
 
@@ -639,29 +637,32 @@ def lint_log_in_header(fname):
     )
 
 
-errors = collections.defaultdict(list)
+def main():
+    colorama.init()
 
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "files", nargs="*", default=[], help="files to be processed (regex on path)"
+    )
+    parser.add_argument(
+        "-c", "--changed", action="store_true", help="Only run on changed files"
+    )
+    parser.add_argument(
+        "--print-slowest", action="store_true", help="Print the slowest checks"
+    )
+    args = parser.parse_args()
 
-def add_errors(fname, errs):
+    global EXECUTABLE_BIT
-    if not isinstance(errs, list):
+    EXECUTABLE_BIT = git_ls_files()
-        errs = [errs]
+    files = list(EXECUTABLE_BIT.keys())
-    for err in errs:
+    # Match against re
-        if err is None:
+    file_name_re = re.compile("|".join(args.files))
-            continue
+    files = [p for p in files if file_name_re.search(p)]
-        try:
-            lineno, col, msg = err
-        except ValueError:
-            lineno = 1
-            col = 1
-            msg = err
-        if not isinstance(msg, str):
-            raise ValueError("Error is not instance of string!")
-        if not isinstance(lineno, int):
-            raise ValueError("Line number is not an int!")
-        if not isinstance(col, int):
-            raise ValueError("Column number is not an int!")
-        errors[fname].append((lineno, col, msg))
 
+    if args.changed:
+        files = filter_changed(files)
+
+    files.sort()
 
     for fname in files:
         _, ext = os.path.splitext(fname)
@@ -701,4 +702,8 @@ if args.print_slowest:
             print(f" - '{name}' took {dur:.2f}s total (ran on {invocations} files)")
         print(f"Total time measured: {sum(x[0] for x in lint_times):.2f}s")
 
-sys.exit(len(errors))
+    return len(errors)
+
+
+if __name__ == "__main__":
+    sys.exit(main())

script/helpers.py

@@ -1,10 +1,11 @@
-import colorama
+import json
 import os.path
 import re
 import subprocess
-import json
 from pathlib import Path
 
+import colorama
+
 root_path = os.path.abspath(os.path.normpath(os.path.join(__file__, "..", "..")))
 basepath = os.path.join(root_path, "esphome")
 temp_folder = os.path.join(root_path, ".temp")
@@ -44,7 +45,7 @@ def build_all_include():
     content = "\n".join(headers)
     p = Path(temp_header_file)
     p.parent.mkdir(exist_ok=True)
-    p.write_text(content)
+    p.write_text(content, encoding="utf-8")
 
 
 def walk_files(path):
@@ -54,14 +55,14 @@ def walk_files(path):
 
 
 def get_output(*args):
-    proc = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    with subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE) as proc:
-    output, err = proc.communicate()
+        output, _ = proc.communicate()
     return output.decode("utf-8")
 
 
 def get_err(*args):
-    proc = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    with subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE) as proc:
-    output, err = proc.communicate()
+        _, err = proc.communicate()
     return err.decode("utf-8")
 
 
@@ -78,7 +79,7 @@ def changed_files():
             merge_base = splitlines_no_ends(get_output(*command))[0]
             break
         # pylint: disable=bare-except
-        except:
+        except:  # noqa: E722
             pass
     else:
         raise ValueError("Git not configured")
@@ -103,7 +104,7 @@ def filter_changed(files):
 def filter_grep(files, value):
     matched = []
     for file in files:
-        with open(file) as handle:
+        with open(file, encoding="utf-8") as handle:
             contents = handle.read()
         if value in contents:
             matched.append(file)
@@ -114,8 +115,8 @@ def git_ls_files(patterns=None):
     command = ["git", "ls-files", "-s"]
     if patterns is not None:
         command.extend(patterns)
-    proc = subprocess.Popen(command, stdout=subprocess.PIPE)
+    with subprocess.Popen(command, stdout=subprocess.PIPE) as proc:
-    output, err = proc.communicate()
+        output, _ = proc.communicate()
     lines = [x.split() for x in output.decode("utf-8").splitlines()]
     return {s[3].strip(): int(s[0]) for s in lines}
 

script/sync-device_class.py

@@ -2,6 +2,7 @@
 
 import re
 
+# pylint: disable=import-error
 from homeassistant.components.binary_sensor import BinarySensorDeviceClass
 from homeassistant.components.button import ButtonDeviceClass
 from homeassistant.components.cover import CoverDeviceClass
@@ -9,6 +10,8 @@ from homeassistant.components.number import NumberDeviceClass
 from homeassistant.components.sensor import SensorDeviceClass
 from homeassistant.components.switch import SwitchDeviceClass
 
+# pylint: enable=import-error
+
 BLOCKLIST = (
     # requires special support on HA side
     "enum",
@@ -25,10 +28,10 @@ DOMAINS = {
 
 
 def sub(path, pattern, repl):
-    with open(path) as handle:
+    with open(path, encoding="utf-8") as handle:
         content = handle.read()
     content = re.sub(pattern, repl, content, flags=re.MULTILINE)
-    with open(path, "w") as handle:
+    with open(path, "w", encoding="utf-8") as handle:
         handle.write(content)