Mercurial > public > mercurial-scm > hg-stable

comparison mercurial/localrepo.py @ 4211:e29f2db5ab18

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Make the tags algorithm smarter
author Matt Mackall <mpm@selenic.com>
date Wed, 14 Mar 2007 18:47:29 -0500
parents caff92047e87
children 6c0be67c2b27
comparison
equal deleted inserted replaced
4210:caff92047e87 4211:e29f2db5ab18
258 def tags(self): 258 def tags(self):
259 '''return a mapping of tag to node''' 259 '''return a mapping of tag to node'''
260 if self.tagscache: 260 if self.tagscache:
261 return self.tagscache 261 return self.tagscache
262 262
263 self.tagscache = {} 263 globaltags = {}
264 globalover = {}
264 265
265 def readtags(lines, fn): 266 def readtags(lines, fn):
266 filetags = {} 267 filetags = {}
268 fileover = {}
267 count = 0 269 count = 0
268 270
269 def warn(msg): 271 def warn(msg):
270 self.ui.warn(_("%s, line %s: %s\n") % (fn, count, msg)) 272 self.ui.warn(_("%s, line %s: %s\n") % (fn, count, msg))
271 273
285 warn(_("node '%s' is not well formed") % node) 287 warn(_("node '%s' is not well formed") % node)
286 continue 288 continue
287 if bin_n not in self.changelog.nodemap: 289 if bin_n not in self.changelog.nodemap:
288 warn(_("tag '%s' refers to unknown node") % key) 290 warn(_("tag '%s' refers to unknown node") % key)
289 continue 291 continue
290 self.tagscache[key] = bin_n 292
291 293 h = {}
292 # read the tags file from each head, ending with the tip, 294 if key in filetags:
293 # and add each tag found to the map, with "newer" ones 295 n, h = filetags[key]
294 # taking precedence 296 h[n] = True
297 filetags[key] = (bin_n, h)
298
299 for k,nh in filetags.items():
300 if k not in globaltags:
301 globaltags[k] = nh
302 continue
303 # we prefer the global tag if:
304 # it supercedes us OR
305 # mutual supercedes and it has a higher rank
306 # otherwise we win because we're tip-most
307 an, ah = nh
308 bn, bh = globaltags[k]
309 if bn != an and an in bh and \
310 (bn not in ah or len(bh) > len(ah)):
311 an = bn
312 ah.update(bh)
313 globaltags[k] = an, ah
314
315 # read the tags file from each head, ending with the tip
295 f = None 316 f = None
296 for rev, node, fnode in self._hgtagsnodes(): 317 for rev, node, fnode in self._hgtagsnodes():
297 f = (f and f.filectx(fnode) or 318 f = (f and f.filectx(fnode) or
298 self.filectx('.hgtags', fileid=fnode)) 319 self.filectx('.hgtags', fileid=fnode))
299 readtags(f.data().splitlines(), f) 320 readtags(f.data().splitlines(), f)
304 # while the internal tag table is stored in UTF-8 325 # while the internal tag table is stored in UTF-8
305 readtags(data.splitlines(), "localtags") 326 readtags(data.splitlines(), "localtags")
306 except IOError: 327 except IOError:
307 pass 328 pass
308 329
330 self.tagscache = {}
331 for k,nh in globaltags.items():
332 n = nh[0]
333 self.tagscache[k] = n
309 self.tagscache['tip'] = self.changelog.tip() 334 self.tagscache['tip'] = self.changelog.tip()
310 335
311 return self.tagscache 336 return self.tagscache
312 337
313 def _hgtagsnodes(self): 338 def _hgtagsnodes(self):