仅当文件有修改时才更新copyright year信息

formatting.py

@@ -14,6 +14,7 @@
 # 2021-06-07     iysheng      Add support with format single file and parse command line parameters
 # 2021-08-24     陈迎春       解决格式化脚本需要和被格式化文件放在同一个磁盘的问题
 # 2021-08-29     Meco Man     优化文件后缀名的判断
+# 2023-04-24     BernardXiong 仅当文件有修改时才更新copyright year信息
 
 # 本文件会自动对指定路径下的所有文件包括子文件夹的文件（.c/.h/.cpp/.hpp）进行扫描
 #   1)将源文件编码统一为UTF-8
@@ -31,6 +32,7 @@
 import re
 import chardet
 import datetime
+import filecmp
 
 # 用空格代替TAB键
 # 这里并不是简单的将TAB替换成4个空格
@@ -80,6 +82,35 @@ def change_realthread_copyright_year(line):
             line = line.replace(line[end-4:end], str_year)# 将20xx替换为今年
     return line
 
+def format_copyright_year(filename):
+    try:
+        file = open(filename, 'r', encoding = 'utf-8')
+
+        temp_file = os.path.join(os.path.dirname(filename), "temp")
+        file_temp = open(temp_file, 'w', encoding='utf-8')
+
+        line_num = 0
+        for line in file:
+            line_num = line_num + 1
+            if line_num < 20: #文件前20行对版权头注释进行扫描，找到截至年份并修改至今年
+                line = change_rtthread_copyright_year(line)
+                line = change_realthread_copyright_year(line)
+
+            file_temp.write(line)
+        file_temp.close()
+        file.close()
+        os.remove(filename)
+        os.rename(temp_file, filename)
+
+    except UnicodeDecodeError:
+        print("解码失败，该文件处理失败" + filename)
+        file_temp.close()
+        file.close()
+    except UnicodeEncodeError:
+        print("编码失败，该文件处理失败" + filename)
+        file_temp.close()
+        file.close()
+
 # 对单个文件进行格式整理
 def format_codes(filename):
     try:
@@ -88,21 +119,23 @@ def format_codes(filename):
         temp_file = filepath + "temp"
         file = open(filename, 'r', encoding='utf-8')
         file_temp = open(temp_file, 'w', encoding='utf-8')
-        line_num = 0
+
         for line in file:
             line = tab2spaces(line)
             line = formattail(line)
 
-            line_num = line_num + 1
-            if line_num < 20: #文件前20行对版权头注释进行扫描，找到截至年份并修改至今年
-                line = change_rtthread_copyright_year(line)
-                line = change_realthread_copyright_year(line)
-
             file_temp.write(line)
         file_temp.close()
         file.close()
-        os.remove(filename)
-        os.rename(temp_file, filename)
+
+        if filecmp.cmp(filename, temp_file):
+            os.remove(temp_file) # same file, no modification
+        else:
+            os.remove(filename)
+            os.rename(temp_file, filename)
+
+            format_copyright_year(filename) # re-format for copyright year information
+
     except UnicodeDecodeError:
         print("解码失败，该文件处理失败" + filename)
         file_temp.close()