author | Benoit Boissinot <benoit.boissinot@ens-lyon.org> |
Mon, 19 Apr 2010 21:44:21 +0200 | |
changeset 10943 | 15aaa3637f19 |
parent 10282 | 08a0f04b56bd |
permissions | -rw-r--r-- |
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# Mercurial extension to make it easy to refer to the parent of a revision |
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# |
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# Copyright (C) 2007 Alexis S. L. Carvalho <alexis@cecm.usp.br> |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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'''interpret suffixes to refer to ancestor revisions |
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This extension allows you to use git-style suffixes to refer to the |
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ancestors of a specific revision. |
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For example, if you can refer to a revision as "foo", then:: |
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foo^N = Nth parent of foo |
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foo^0 = foo |
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foo^1 = first parent of foo |
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foo^2 = second parent of foo |
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foo^ = foo^1 |
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foo~N = Nth first grandparent of foo |
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foo~0 = foo |
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foo~1 = foo^1 = foo^ = first parent of foo |
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foo~2 = foo^1^1 = foo^^ = first parent of first parent of foo |
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''' |
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from mercurial import error |
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def reposetup(ui, repo): |
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if not repo.local(): |
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return |
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class parentrevspecrepo(repo.__class__): |
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def lookup(self, key): |
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try: |
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_super = super(parentrevspecrepo, self) |
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return _super.lookup(key) |
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except error.RepoError: |
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pass |
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circ = key.find('^') |
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tilde = key.find('~') |
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if circ < 0 and tilde < 0: |
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raise |
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elif circ >= 0 and tilde >= 0: |
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end = min(circ, tilde) |
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else: |
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end = max(circ, tilde) |
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cl = self.changelog |
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base = key[:end] |
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try: |
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node = _super.lookup(base) |
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except error.RepoError: |
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# eek - reraise the first error |
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return _super.lookup(key) |
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rev = cl.rev(node) |
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suffix = key[end:] |
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i = 0 |
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while i < len(suffix): |
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# foo^N => Nth parent of foo |
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# foo^0 == foo |
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# foo^1 == foo^ == 1st parent of foo |
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# foo^2 == 2nd parent of foo |
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if suffix[i] == '^': |
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j = i + 1 |
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p = cl.parentrevs(rev) |
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if j < len(suffix) and suffix[j].isdigit(): |
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j += 1 |
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n = int(suffix[i + 1:j]) |
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if n > 2 or n == 2 and p[1] == -1: |
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raise |
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else: |
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n = 1 |
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if n: |
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rev = p[n - 1] |
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i = j |
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# foo~N => Nth first grandparent of foo |
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# foo~0 = foo |
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# foo~1 = foo^1 == foo^ == 1st parent of foo |
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# foo~2 = foo^1^1 == foo^^ == 1st parent of 1st parent of foo |
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elif suffix[i] == '~': |
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j = i + 1 |
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while j < len(suffix) and suffix[j].isdigit(): |
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j += 1 |
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if j == i + 1: |
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raise |
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n = int(suffix[i + 1:j]) |
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for k in xrange(n): |
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rev = cl.parentrevs(rev)[0] |
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i = j |
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else: |
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raise |
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return cl.node(rev) |
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repo.__class__ = parentrevspecrepo |