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comparison mercurial/obsolete.py @ 22345:cf7014c5f087

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obsolete: add a `commonversion` function This function returns the highest common version between the locally known formats and a list of remotely known formats. This is going to be useful to know what format should be used for exchange.
author Pierre-Yves David <pierre-yves.david@fb.com>
date Tue, 26 Aug 2014 11:36:23 +0200
parents 9680da73cfe0
children 813c6855b97f
comparison
equal deleted inserted replaced
22344:9829b7948100 22345:cf7014c5f087
453 seenmarkers |= direct 453 seenmarkers |= direct
454 pendingnodes -= seennodes 454 pendingnodes -= seennodes
455 seennodes |= pendingnodes 455 seennodes |= pendingnodes
456 return seenmarkers 456 return seenmarkers
457 457
458 def commonversion(versions):
459 """Return the newest version listed in both versions and our local formats.
460
461 Returns None if no common version exists.
462 """
463 versions.sort(reverse=True)
464 # search for highest version known on both side
465 for v in versions:
466 if v in formats:
467 return v
468 return None
458 469
459 # arbitrary picked to fit into 8K limit from HTTP server 470 # arbitrary picked to fit into 8K limit from HTTP server
460 # you have to take in account: 471 # you have to take in account:
461 # - the version header 472 # - the version header
462 # - the base85 encoding 473 # - the base85 encoding