[time] Use lazy callback for time sync to save 8 bytes

esphome/components/esp32_hosted/update/esp32_hosted_update.cpp

@@ -38,7 +38,7 @@ static const char *const ESP_HOSTED_VERSION_STR = STRINGIFY(ESP_HOSTED_VERSION_M
 // Returns true if parsing succeeded
 static bool parse_version(const std::string &version_str, int &major, int &minor, int &patch) {
   major = minor = patch = 0;
-  if (sscanf(version_str.c_str(), "%d.%d.%d", &major, &minor, &patch) >= 2) {  // NOLINT
+  if (sscanf(version_str.c_str(), "%d.%d.%d", &major, &minor, &patch) >= 2) {
     return true;
   }
   return false;

esphome/components/time/real_time_clock.h

@@ -62,7 +62,7 @@ class RealTimeClock : public PollingComponent {
   void apply_timezone_();
 #endif
 
-  CallbackManager<void()> time_sync_callback_;
+  LazyCallbackManager<void()> time_sync_callback_;
 };
 
 template<typename... Ts> class TimeHasTimeCondition : public Condition<Ts...> {

script/ci-custom.py

@@ -756,28 +756,6 @@ def lint_no_sprintf(fname, match):
     )
 
 
-@lint_re_check(
-    # Match scanf family functions: scanf, sscanf, fscanf, vscanf, vsscanf, vfscanf
-    # Also match std:: prefixed versions
-    # [^\w] ensures we match function calls, not substrings
-    r"[^\w]((?:std::)?v?[fs]?scanf)\s*\(" + CPP_RE_EOL,
-    include=cpp_include,
-)
-def lint_no_scanf(fname, match):
-    func = match.group(1)
-    return (
-        f"{highlight(func + '()')} is not allowed in new ESPHome code. The scanf family "
-        f"pulls in ~7KB flash on ESP8266 and ~9KB on ESP32, and ESPHome doesn't otherwise "
-        f"need this code.\n"
-        f"Please use alternatives:\n"
-        f"  - {highlight('parse_number<T>(str)')} for parsing integers/floats from strings\n"
-        f"  - {highlight('strtol()/strtof()')} for C-style number parsing with error checking\n"
-        f"  - {highlight('parse_hex()')} for hex string parsing\n"
-        f"  - Manual parsing for simple fixed formats\n"
-        f"(If strictly necessary, add `// NOLINT` to the end of the line)"
-    )
-
-
 @lint_content_find_check(
     "ESP_LOG",
     include=["*.h", "*.tcc"],