Mercurial > public > mercurial-scm > hg-stable
comparison mercurial/util.py @ 8327:aa25be1c2889
atomictempfile: delegate to posixfile instead of inheriting from it
| author | Bryan O'Sullivan <bos@serpentine.com> |
|---|---|
| date | Thu, 26 Mar 2009 13:12:11 -0700 |
| parents | b87a50b7125c |
| children | f55869abb5c3 |
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| 8326:b7017097a4ec | 8327:aa25be1c2889 |
|---|---|
| 962 try: os.unlink(temp) | 962 try: os.unlink(temp) |
| 963 except: pass | 963 except: pass |
| 964 raise | 964 raise |
| 965 return temp | 965 return temp |
| 966 | 966 |
| 967 class atomictempfile(posixfile): | 967 class atomictempfile: |
| 968 """file-like object that atomically updates a file | 968 """file-like object that atomically updates a file |
| 969 | 969 |
| 970 All writes will be redirected to a temporary copy of the original | 970 All writes will be redirected to a temporary copy of the original |
| 971 file. When rename is called, the copy is renamed to the original | 971 file. When rename is called, the copy is renamed to the original |
| 972 name, making the changes visible. | 972 name, making the changes visible. |
| 973 """ | 973 """ |
| 974 def __init__(self, name, mode, createmode): | 974 def __init__(self, name, mode, createmode): |
| 975 self.__name = name | 975 self.__name = name |
| 976 self.temp = mktempcopy(name, emptyok=('w' in mode), | 976 self.temp = mktempcopy(name, emptyok=('w' in mode), |
| 977 createmode=createmode) | 977 createmode=createmode) |
| 978 posixfile.__init__(self, self.temp, mode) | 978 self._fp = posixfile(self.temp, mode) |
| 979 | |
| 980 def __getattr__(self, name): | |
| 981 return getattr(self._fp, name) | |
| 979 | 982 |
| 980 def rename(self): | 983 def rename(self): |
| 981 if not self.closed: | 984 if not self.closed: |
| 982 posixfile.close(self) | 985 self._fp.close() |
| 983 rename(self.temp, localpath(self.__name)) | 986 rename(self.temp, localpath(self.__name)) |
| 984 | 987 |
| 985 def __del__(self): | 988 def __del__(self): |
| 986 if not self.closed: | 989 if not self.closed: |
| 987 try: | 990 try: |
| 988 os.unlink(self.temp) | 991 os.unlink(self.temp) |
| 989 except: pass | 992 except: pass |
| 990 posixfile.close(self) | 993 self._fp.close() |
| 991 | 994 |
| 992 def makedirs(name, mode=None): | 995 def makedirs(name, mode=None): |
| 993 """recursive directory creation with parent mode inheritance""" | 996 """recursive directory creation with parent mode inheritance""" |
| 994 try: | 997 try: |
| 995 os.mkdir(name) | 998 os.mkdir(name) |