Add min_version to esphome config (#3866)

esphome/core/config.py

@@ -15,6 +15,7 @@ from esphome.const import (
     CONF_FRAMEWORK,
     CONF_INCLUDES,
     CONF_LIBRARIES,
+    CONF_MIN_VERSION,
     CONF_NAME,
     CONF_ON_BOOT,
     CONF_ON_LOOP,
@@ -30,6 +31,7 @@ from esphome.const import (
     KEY_CORE,
     TARGET_PLATFORMS,
     PLATFORM_ESP8266,
+    __version__ as ESPHOME_VERSION,
 )
 from esphome.core import CORE, coroutine_with_priority
 from esphome.helpers import copy_file_if_changed, walk_files
@@ -96,6 +98,16 @@ def valid_project_name(value: str):
     return value
 
 
+def validate_version(value: str):
+    min_version = cv.Version.parse(value)
+    current_version = cv.Version.parse(ESPHOME_VERSION)
+    if current_version < min_version:
+        raise cv.Invalid(
+            f"Your ESPHome version is too old. Please update to at least {min_version}"
+        )
+    return value
+
+
 CONF_ESP8266_RESTORE_FROM_FLASH = "esp8266_restore_from_flash"
 CONFIG_SCHEMA = cv.All(
     cv.Schema(
@@ -136,6 +148,9 @@ CONFIG_SCHEMA = cv.All(
                     cv.Required(CONF_VERSION): cv.string_strict,
                 }
             ),
+            cv.Optional(CONF_MIN_VERSION, default=ESPHOME_VERSION): cv.All(
+                cv.version_number, validate_version
+            ),
         }
     ),
     validate_hostname,