Mercurial > hg > mercurial-crew-with-dirclash
comparison mercurial/util.py @ 4859:41ad4105dde9
Add symlink method to util.opener.
Differences from os.symlink:
- the symlink name is relative to the opener base directory
- if a file with that name already exists, it's removed
- if necessary, parent directories are created
- if the system (OS or filesystem) doesn't support symlinks, a
regular file is created. Its contents are the symlink target.
| author | Alexis S. L. Carvalho <alexis@cecm.usp.br> |
|---|---|
| date | Wed, 11 Jul 2007 17:40:41 -0300 |
| parents | 89defeae88f3 |
| children | 0875082d5471 |
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| 4858:89defeae88f3 | 4859:41ad4105dde9 |
|---|---|
| 1258 """ | 1258 """ |
| 1259 def __init__(self, base, audit=True): | 1259 def __init__(self, base, audit=True): |
| 1260 self.base = base | 1260 self.base = base |
| 1261 self.audit = audit | 1261 self.audit = audit |
| 1262 | 1262 |
| 1263 def __getattr__(self, name): | |
| 1264 if name == '_can_symlink': | |
| 1265 self._can_symlink = checklink(self.base) | |
| 1266 return self._can_symlink | |
| 1267 raise AttributeError(name) | |
| 1268 | |
| 1263 def __call__(self, path, mode="r", text=False, atomictemp=False): | 1269 def __call__(self, path, mode="r", text=False, atomictemp=False): |
| 1264 if self.audit: | 1270 if self.audit: |
| 1265 audit_path(path) | 1271 audit_path(path) |
| 1266 f = os.path.join(self.base, path) | 1272 f = os.path.join(self.base, path) |
| 1267 | 1273 |
| 1279 if atomictemp: | 1285 if atomictemp: |
| 1280 return atomictempfile(f, mode) | 1286 return atomictempfile(f, mode) |
| 1281 if nlink > 1: | 1287 if nlink > 1: |
| 1282 rename(mktempcopy(f), f) | 1288 rename(mktempcopy(f), f) |
| 1283 return posixfile(f, mode) | 1289 return posixfile(f, mode) |
| 1290 | |
| 1291 def symlink(self, src, dst): | |
| 1292 if self.audit: | |
| 1293 audit_path(dst) | |
| 1294 linkname = os.path.join(self.base, dst) | |
| 1295 try: | |
| 1296 os.unlink(linkname) | |
| 1297 except OSError: | |
| 1298 pass | |
| 1299 | |
| 1300 dirname = os.path.dirname(linkname) | |
| 1301 if not os.path.exists(dirname): | |
| 1302 os.makedirs(dirname) | |
| 1303 | |
| 1304 if self._can_symlink: | |
| 1305 os.symlink(src, linkname) | |
| 1306 else: | |
| 1307 f = self(self, dst, "w") | |
| 1308 f.write(src) | |
| 1309 f.close() | |
| 1284 | 1310 |
| 1285 class chunkbuffer(object): | 1311 class chunkbuffer(object): |
| 1286 """Allow arbitrary sized chunks of data to be efficiently read from an | 1312 """Allow arbitrary sized chunks of data to be efficiently read from an |
| 1287 iterator over chunks of arbitrary size.""" | 1313 iterator over chunks of arbitrary size.""" |
| 1288 | 1314 |