Mercurial > public > mercurial-scm > hg-stable
comparison mercurial/node.py @ 1089:142b5d5ec9cc
Break apart hg.py
- move the various parts of hg.py into their own files
- create node.py to store node manipulation functions
| author | mpm@selenic.com |
|---|---|
| date | Sat, 27 Aug 2005 14:21:25 -0700 |
| parents | |
| children | d62130f99a73 |
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| 1088:39b916b1d8e4 | 1089:142b5d5ec9cc |
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| 1 """ | |
| 2 node.py - basic nodeid manipulation for mercurial | |
| 3 | |
| 4 Copyright 2005 Matt Mackall <mpm@selenic.com> | |
| 5 | |
| 6 This software may be used and distributed according to the terms | |
| 7 of the GNU General Public License, incorporated herein by reference. | |
| 8 """ | |
| 9 | |
| 10 import sha, binascii | |
| 11 | |
| 12 nullid = "\0" * 20 | |
| 13 | |
| 14 def hex(node): | |
| 15 return binascii.hexlify(node) | |
| 16 | |
| 17 def bin(node): | |
| 18 return binascii.unhexlify(node) | |
| 19 | |
| 20 def short(node): | |
| 21 return hex(node[:6]) | |
| 22 | |
| 23 def hash(text, p1, p2): | |
| 24 """generate a hash from the given text and its parent hashes | |
| 25 | |
| 26 This hash combines both the current file contents and its history | |
| 27 in a manner that makes it easy to distinguish nodes with the same | |
| 28 content in the revision graph. | |
| 29 """ | |
| 30 l = [p1, p2] | |
| 31 l.sort() | |
| 32 s = sha.new(l[0]) | |
| 33 s.update(l[1]) | |
| 34 s.update(text) | |
| 35 return s.digest() | |
| 36 |